/*************************************************************************/
/*  shader_graph.cpp                                                     */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md)    */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/
#include "shader_graph.h"
#include "scene/scene_string_names.h"

Array ShaderGraph::_get_node_list(ShaderType p_type) const {

	List<int> nodes;
	get_node_list(p_type, &nodes);
	Array arr(true);
	for (List<int>::Element *E = nodes.front(); E; E = E->next())
		arr.push_back(E->get());
	return arr;
}
Array ShaderGraph::_get_connections(ShaderType p_type) const {

	List<Connection> connections;
	get_node_connections(p_type, &connections);
	Array arr(true);
	for (List<Connection>::Element *E = connections.front(); E; E = E->next()) {

		Dictionary d(true);
		d["src_id"] = E->get().src_id;
		d["src_slot"] = E->get().src_slot;
		d["dst_id"] = E->get().dst_id;
		d["dst_slot"] = E->get().dst_slot;
		arr.push_back(d);
	}
	return arr;
}

void ShaderGraph::_set_data(const Dictionary &p_data) {

	Dictionary d = p_data;
	ERR_FAIL_COND(!d.has("shaders"));
	Array sh = d["shaders"];
	ERR_FAIL_COND(sh.size() != 3);

	for (int t = 0; t < 3; t++) {
		Array data = sh[t];
		ERR_FAIL_COND((data.size() % 6) != 0);
		shader[t].node_map.clear();
		for (int i = 0; i < data.size(); i += 6) {

			Node n;
			n.id = data[i + 0];
			n.type = NodeType(int(data[i + 1]));
			n.pos = data[i + 2];
			n.param1 = data[i + 3];
			n.param2 = data[i + 4];

			Array conns = data[i + 5];
			ERR_FAIL_COND((conns.size() % 3) != 0);

			for (int j = 0; j < conns.size(); j += 3) {
				SourceSlot ss;
				int ls = conns[j + 0];
				if (ls == SLOT_DEFAULT_VALUE) {
					n.defaults[conns[j + 1]] = conns[j + 2];
				} else {
					ss.id = conns[j + 1];
					ss.slot = conns[j + 2];
					n.connections[ls] = ss;
				}
			}
			shader[t].node_map[n.id] = n;
		}
	}

	_pending_update_shader = true;
	_update_shader();
}

Dictionary ShaderGraph::_get_data() const {

	Array sh;
	for (int i = 0; i < 3; i++) {
		Array data;
		int ec = shader[i].node_map.size();
		data.resize(ec * 6);
		int idx = 0;
		for (Map<int, Node>::Element *E = shader[i].node_map.front(); E; E = E->next()) {

			data[idx + 0] = E->key();
			data[idx + 1] = E->get().type;
			data[idx + 2] = E->get().pos;
			data[idx + 3] = E->get().param1;
			data[idx + 4] = E->get().param2;

			Array conns;
			conns.resize(E->get().connections.size() * 3 + E->get().defaults.size() * 3);
			int idx2 = 0;
			for (Map<int, SourceSlot>::Element *F = E->get().connections.front(); F; F = F->next()) {

				conns[idx2 + 0] = F->key();
				conns[idx2 + 1] = F->get().id;
				conns[idx2 + 2] = F->get().slot;
				idx2 += 3;
			}
			for (Map<int, Variant>::Element *F = E->get().defaults.front(); F; F = F->next()) {

				conns[idx2 + 0] = SLOT_DEFAULT_VALUE;
				conns[idx2 + 1] = F->key();
				conns[idx2 + 2] = F->get();
				idx2 += 3;
			}

			data[idx + 5] = conns;
			idx += 6;
		}
		sh.push_back(data);
	}

	Dictionary data;
	data["shaders"] = sh;
	return data;
}

ShaderGraph::GraphError ShaderGraph::get_graph_error(ShaderType p_type) const {

	ERR_FAIL_INDEX_V(p_type, 3, GRAPH_OK);
	return shader[p_type].error;
}

int ShaderGraph::node_count(ShaderType p_which, int p_type) {
	int count = 0;
	for (Map<int, Node>::Element *E = shader[p_which].node_map.front(); E; E = E->next())
		if (E->get().type == p_type)
			count++;
	return count;
}

void ShaderGraph::_bind_methods() {

	ObjectTypeDB::bind_method(_MD("_update_shader"), &ShaderGraph::_update_shader);

	ObjectTypeDB::bind_method(_MD("node_add", "shader_type", "node_type", "id"), &ShaderGraph::node_add);
	ObjectTypeDB::bind_method(_MD("node_remove", "shader_type", "id"), &ShaderGraph::node_remove);
	ObjectTypeDB::bind_method(_MD("node_set_pos", "shader_type", "id", "pos"), &ShaderGraph::node_set_pos);
	ObjectTypeDB::bind_method(_MD("node_get_pos", "shader_type", "id"), &ShaderGraph::node_get_pos);

	ObjectTypeDB::bind_method(_MD("node_get_type", "shader_type", "id"), &ShaderGraph::node_get_type);

	ObjectTypeDB::bind_method(_MD("get_node_list", "shader_type"), &ShaderGraph::_get_node_list);

	ObjectTypeDB::bind_method(_MD("default_set_value", "shader_type", "id", "param_id", "value"), &ShaderGraph::default_set_value);
	ObjectTypeDB::bind_method(_MD("default_get_value", "shader_type", "id", "param_id"), &ShaderGraph::default_get_value);

	ObjectTypeDB::bind_method(_MD("scalar_const_node_set_value", "shader_type", "id", "value"), &ShaderGraph::scalar_const_node_set_value);
	ObjectTypeDB::bind_method(_MD("scalar_const_node_get_value", "shader_type", "id"), &ShaderGraph::scalar_const_node_get_value);

	ObjectTypeDB::bind_method(_MD("vec_const_node_set_value", "shader_type", "id", "value"), &ShaderGraph::vec_const_node_set_value);
	ObjectTypeDB::bind_method(_MD("vec_const_node_get_value", "shader_type", "id"), &ShaderGraph::vec_const_node_get_value);

	ObjectTypeDB::bind_method(_MD("rgb_const_node_set_value", "shader_type", "id", "value"), &ShaderGraph::rgb_const_node_set_value);
	ObjectTypeDB::bind_method(_MD("rgb_const_node_get_value", "shader_type", "id"), &ShaderGraph::rgb_const_node_get_value);

	ObjectTypeDB::bind_method(_MD("xform_const_node_set_value", "shader_type", "id", "value"), &ShaderGraph::xform_const_node_set_value);
	ObjectTypeDB::bind_method(_MD("xform_const_node_get_value", "shader_type", "id"), &ShaderGraph::xform_const_node_get_value);

	//	void get_node_list(ShaderType p_which,List<int> *p_node_list) const;

	ObjectTypeDB::bind_method(_MD("texture_node_set_filter_size", "shader_type", "id", "filter_size"), &ShaderGraph::texture_node_set_filter_size);
	ObjectTypeDB::bind_method(_MD("texture_node_get_filter_size", "shader_type", "id"), &ShaderGraph::texture_node_get_filter_size);

	ObjectTypeDB::bind_method(_MD("texture_node_set_filter_strength", "shader_type", "id", "filter_strength"), &ShaderGraph::texture_node_set_filter_strength);
	ObjectTypeDB::bind_method(_MD("texture_node_get_filter_strength", "shader_type", "id"), &ShaderGraph::texture_node_get_filter_strength);

	ObjectTypeDB::bind_method(_MD("scalar_op_node_set_op", "shader_type", "id", "op"), &ShaderGraph::scalar_op_node_set_op);
	ObjectTypeDB::bind_method(_MD("scalar_op_node_get_op", "shader_type", "id"), &ShaderGraph::scalar_op_node_get_op);

	ObjectTypeDB::bind_method(_MD("vec_op_node_set_op", "shader_type", "id", "op"), &ShaderGraph::vec_op_node_set_op);
	ObjectTypeDB::bind_method(_MD("vec_op_node_get_op", "shader_type", "id"), &ShaderGraph::vec_op_node_get_op);

	ObjectTypeDB::bind_method(_MD("vec_scalar_op_node_set_op", "shader_type", "id", "op"), &ShaderGraph::vec_scalar_op_node_set_op);
	ObjectTypeDB::bind_method(_MD("vec_scalar_op_node_get_op", "shader_type", "id"), &ShaderGraph::vec_scalar_op_node_get_op);

	ObjectTypeDB::bind_method(_MD("rgb_op_node_set_op", "shader_type", "id", "op"), &ShaderGraph::rgb_op_node_set_op);
	ObjectTypeDB::bind_method(_MD("rgb_op_node_get_op", "shader_type", "id"), &ShaderGraph::rgb_op_node_get_op);

	ObjectTypeDB::bind_method(_MD("xform_vec_mult_node_set_no_translation", "shader_type", "id", "disable"), &ShaderGraph::xform_vec_mult_node_set_no_translation);
	ObjectTypeDB::bind_method(_MD("xform_vec_mult_node_get_no_translation", "shader_type", "id"), &ShaderGraph::xform_vec_mult_node_get_no_translation);

	ObjectTypeDB::bind_method(_MD("scalar_func_node_set_function", "shader_type", "id", "func"), &ShaderGraph::scalar_func_node_set_function);
	ObjectTypeDB::bind_method(_MD("scalar_func_node_get_function", "shader_type", "id"), &ShaderGraph::scalar_func_node_get_function);

	ObjectTypeDB::bind_method(_MD("vec_func_node_set_function", "shader_type", "id", "func"), &ShaderGraph::vec_func_node_set_function);
	ObjectTypeDB::bind_method(_MD("vec_func_node_get_function", "shader_type", "id"), &ShaderGraph::vec_func_node_get_function);

	ObjectTypeDB::bind_method(_MD("input_node_set_name", "shader_type", "id", "name"), &ShaderGraph::input_node_set_name);
	ObjectTypeDB::bind_method(_MD("input_node_get_name", "shader_type", "id"), &ShaderGraph::input_node_get_name);

	ObjectTypeDB::bind_method(_MD("scalar_input_node_set_value", "shader_type", "id", "value"), &ShaderGraph::scalar_input_node_set_value);
	ObjectTypeDB::bind_method(_MD("scalar_input_node_get_value", "shader_type", "id"), &ShaderGraph::scalar_input_node_get_value);

	ObjectTypeDB::bind_method(_MD("vec_input_node_set_value", "shader_type", "id", "value"), &ShaderGraph::vec_input_node_set_value);
	ObjectTypeDB::bind_method(_MD("vec_input_node_get_value", "shader_type", "id"), &ShaderGraph::vec_input_node_get_value);

	ObjectTypeDB::bind_method(_MD("rgb_input_node_set_value", "shader_type", "id", "value"), &ShaderGraph::rgb_input_node_set_value);
	ObjectTypeDB::bind_method(_MD("rgb_input_node_get_value", "shader_type", "id"), &ShaderGraph::rgb_input_node_get_value);

	ObjectTypeDB::bind_method(_MD("xform_input_node_set_value", "shader_type", "id", "value"), &ShaderGraph::xform_input_node_set_value);
	ObjectTypeDB::bind_method(_MD("xform_input_node_get_value", "shader_type", "id"), &ShaderGraph::xform_input_node_get_value);

	ObjectTypeDB::bind_method(_MD("texture_input_node_set_value", "shader_type", "id", "value:Texture"), &ShaderGraph::texture_input_node_set_value);
	ObjectTypeDB::bind_method(_MD("texture_input_node_get_value:Texture", "shader_type", "id"), &ShaderGraph::texture_input_node_get_value);

	ObjectTypeDB::bind_method(_MD("cubemap_input_node_set_value", "shader_type", "id", "value:CubeMap"), &ShaderGraph::cubemap_input_node_set_value);
	ObjectTypeDB::bind_method(_MD("cubemap_input_node_get_value:CubeMap", "shader_type", "id"), &ShaderGraph::cubemap_input_node_get_value);

	ObjectTypeDB::bind_method(_MD("comment_node_set_text", "shader_type", "id", "text"), &ShaderGraph::comment_node_set_text);
	ObjectTypeDB::bind_method(_MD("comment_node_get_text", "shader_type", "id"), &ShaderGraph::comment_node_get_text);

	ObjectTypeDB::bind_method(_MD("color_ramp_node_set_ramp", "shader_type", "id", "colors", "offsets"), &ShaderGraph::color_ramp_node_set_ramp);
	ObjectTypeDB::bind_method(_MD("color_ramp_node_get_colors", "shader_type", "id"), &ShaderGraph::color_ramp_node_get_colors);
	ObjectTypeDB::bind_method(_MD("color_ramp_node_get_offsets", "shader_type", "id"), &ShaderGraph::color_ramp_node_get_offsets);

	ObjectTypeDB::bind_method(_MD("curve_map_node_set_points", "shader_type", "id", "points"), &ShaderGraph::curve_map_node_set_points);
	ObjectTypeDB::bind_method(_MD("curve_map_node_get_points", "shader_type", "id"), &ShaderGraph::curve_map_node_get_points);

	ObjectTypeDB::bind_method(_MD("connect_node:Error", "shader_type", "src_id", "src_slot", "dst_id", "dst_slot"), &ShaderGraph::connect_node);
	ObjectTypeDB::bind_method(_MD("is_node_connected", "shader_type", "src_id", "src_slot", "dst_id", "dst_slot"), &ShaderGraph::is_node_connected);
	ObjectTypeDB::bind_method(_MD("disconnect_node", "shader_type", "src_id", "src_slot", "dst_id", "dst_slot"), &ShaderGraph::disconnect_node);
	ObjectTypeDB::bind_method(_MD("get_node_connections", "shader_type"), &ShaderGraph::_get_connections);

	ObjectTypeDB::bind_method(_MD("clear", "shader_type"), &ShaderGraph::clear);

	ObjectTypeDB::bind_method(_MD("node_set_state", "shader_type", "id", "state"), &ShaderGraph::node_set_state);
	ObjectTypeDB::bind_method(_MD("node_get_state:Variant", "shader_type", "id"), &ShaderGraph::node_get_state);

	ObjectTypeDB::bind_method(_MD("_set_data"), &ShaderGraph::_set_data);
	ObjectTypeDB::bind_method(_MD("_get_data"), &ShaderGraph::_get_data);

	ADD_PROPERTY(PropertyInfo(Variant::DICTIONARY, "_data", PROPERTY_HINT_NONE, "", PROPERTY_USAGE_NOEDITOR), _SCS("_set_data"), _SCS("_get_data"));

	//void get_connections(ShaderType p_which,List<Connection> *p_connections) const;

	BIND_CONSTANT(NODE_INPUT); // all inputs (shader type dependent)
	BIND_CONSTANT(NODE_SCALAR_CONST); //scalar constant
	BIND_CONSTANT(NODE_VEC_CONST); //vec3 constant
	BIND_CONSTANT(NODE_RGB_CONST); //rgb constant (shows a color picker instead)
	BIND_CONSTANT(NODE_XFORM_CONST); // 4x4 matrix constant
	BIND_CONSTANT(NODE_TIME); // time in seconds
	BIND_CONSTANT(NODE_SCREEN_TEX); // screen texture sampler (takes UV) (only usable in fragment shader)
	BIND_CONSTANT(NODE_SCALAR_OP); // scalar vs scalar op (mul ); add ); div ); etc)
	BIND_CONSTANT(NODE_VEC_OP); // vec3 vs vec3 op (mul );ad );div );crossprod );etc)
	BIND_CONSTANT(NODE_VEC_SCALAR_OP); // vec3 vs scalar op (mul ); add ); div ); etc)
	BIND_CONSTANT(NODE_RGB_OP); // vec3 vs vec3 rgb op (with scalar amount) ); like brighten ); darken ); burn ); dodge ); multiply ); etc.
	BIND_CONSTANT(NODE_XFORM_MULT); // mat4 x mat4
	BIND_CONSTANT(NODE_XFORM_VEC_MULT); // mat4 x vec3 mult (with no-translation option)
	BIND_CONSTANT(NODE_XFORM_VEC_INV_MULT); // mat4 x vec3 inverse mult (with no-translation option)
	BIND_CONSTANT(NODE_SCALAR_FUNC); // scalar function (sin ); cos ); etc)
	BIND_CONSTANT(NODE_VEC_FUNC); // vector function (normalize ); negate ); reciprocal ); rgb2hsv ); hsv2rgb ); etc ); etc)
	BIND_CONSTANT(NODE_VEC_LEN); // vec3 length
	BIND_CONSTANT(NODE_DOT_PROD); // vec3 . vec3 (dot product -> scalar output)
	BIND_CONSTANT(NODE_VEC_TO_SCALAR); // 1 vec3 input ); 3 scalar outputs
	BIND_CONSTANT(NODE_SCALAR_TO_VEC); // 3 scalar input ); 1 vec3 output
	BIND_CONSTANT(NODE_VEC_TO_XFORM); // 3 vec input ); 1 xform output
	BIND_CONSTANT(NODE_XFORM_TO_VEC); // 3 vec input ); 1 xform output
	BIND_CONSTANT(NODE_SCALAR_INTERP); // scalar interpolation (with optional curve)
	BIND_CONSTANT(NODE_VEC_INTERP); // vec3 interpolation  (with optional curve)
	BIND_CONSTANT(NODE_COLOR_RAMP);
	BIND_CONSTANT(NODE_CURVE_MAP);
	BIND_CONSTANT(NODE_SCALAR_INPUT); // scalar uniform (assignable in material)
	BIND_CONSTANT(NODE_VEC_INPUT); // vec3 uniform (assignable in material)
	BIND_CONSTANT(NODE_RGB_INPUT); // color uniform (assignable in material)
	BIND_CONSTANT(NODE_XFORM_INPUT); // mat4 uniform (assignable in material)
	BIND_CONSTANT(NODE_TEXTURE_INPUT); // texture input (assignable in material)
	BIND_CONSTANT(NODE_CUBEMAP_INPUT); // cubemap input (assignable in material)
	BIND_CONSTANT(NODE_DEFAULT_TEXTURE);
	BIND_CONSTANT(NODE_OUTPUT); // output (shader type dependent)
	BIND_CONSTANT(NODE_COMMENT); // comment
	BIND_CONSTANT(NODE_TYPE_MAX);

	BIND_CONSTANT(SLOT_TYPE_SCALAR);
	BIND_CONSTANT(SLOT_TYPE_VEC);
	BIND_CONSTANT(SLOT_TYPE_XFORM);
	BIND_CONSTANT(SLOT_TYPE_TEXTURE);
	BIND_CONSTANT(SLOT_MAX);

	BIND_CONSTANT(SHADER_TYPE_VERTEX);
	BIND_CONSTANT(SHADER_TYPE_FRAGMENT);
	BIND_CONSTANT(SHADER_TYPE_LIGHT);
	BIND_CONSTANT(SHADER_TYPE_MAX);

	BIND_CONSTANT(SLOT_IN);
	BIND_CONSTANT(SLOT_OUT);

	BIND_CONSTANT(GRAPH_OK);
	BIND_CONSTANT(GRAPH_ERROR_CYCLIC);
	BIND_CONSTANT(GRAPH_ERROR_MISSING_CONNECTIONS);

	BIND_CONSTANT(SCALAR_OP_ADD);
	BIND_CONSTANT(SCALAR_OP_SUB);
	BIND_CONSTANT(SCALAR_OP_MUL);
	BIND_CONSTANT(SCALAR_OP_DIV);
	BIND_CONSTANT(SCALAR_OP_MOD);
	BIND_CONSTANT(SCALAR_OP_POW);
	BIND_CONSTANT(SCALAR_OP_MAX);
	BIND_CONSTANT(SCALAR_OP_MIN);
	BIND_CONSTANT(SCALAR_OP_ATAN2);
	BIND_CONSTANT(SCALAR_MAX_OP);

	BIND_CONSTANT(VEC_OP_ADD);
	BIND_CONSTANT(VEC_OP_SUB);
	BIND_CONSTANT(VEC_OP_MUL);
	BIND_CONSTANT(VEC_OP_DIV);
	BIND_CONSTANT(VEC_OP_MOD);
	BIND_CONSTANT(VEC_OP_POW);
	BIND_CONSTANT(VEC_OP_MAX);
	BIND_CONSTANT(VEC_OP_MIN);
	BIND_CONSTANT(VEC_OP_CROSS);
	BIND_CONSTANT(VEC_MAX_OP);

	BIND_CONSTANT(VEC_SCALAR_OP_MUL);
	BIND_CONSTANT(VEC_SCALAR_OP_DIV);
	BIND_CONSTANT(VEC_SCALAR_OP_POW);
	BIND_CONSTANT(VEC_SCALAR_MAX_OP);

	BIND_CONSTANT(RGB_OP_SCREEN);
	BIND_CONSTANT(RGB_OP_DIFFERENCE);
	BIND_CONSTANT(RGB_OP_DARKEN);
	BIND_CONSTANT(RGB_OP_LIGHTEN);
	BIND_CONSTANT(RGB_OP_OVERLAY);
	BIND_CONSTANT(RGB_OP_DODGE);
	BIND_CONSTANT(RGB_OP_BURN);
	BIND_CONSTANT(RGB_OP_SOFT_LIGHT);
	BIND_CONSTANT(RGB_OP_HARD_LIGHT);
	BIND_CONSTANT(RGB_MAX_OP);

	BIND_CONSTANT(SCALAR_FUNC_SIN);
	BIND_CONSTANT(SCALAR_FUNC_COS);
	BIND_CONSTANT(SCALAR_FUNC_TAN);
	BIND_CONSTANT(SCALAR_FUNC_ASIN);
	BIND_CONSTANT(SCALAR_FUNC_ACOS);
	BIND_CONSTANT(SCALAR_FUNC_ATAN);
	BIND_CONSTANT(SCALAR_FUNC_SINH);
	BIND_CONSTANT(SCALAR_FUNC_COSH);
	BIND_CONSTANT(SCALAR_FUNC_TANH);
	BIND_CONSTANT(SCALAR_FUNC_LOG);
	BIND_CONSTANT(SCALAR_FUNC_EXP);
	BIND_CONSTANT(SCALAR_FUNC_SQRT);
	BIND_CONSTANT(SCALAR_FUNC_ABS);
	BIND_CONSTANT(SCALAR_FUNC_SIGN);
	BIND_CONSTANT(SCALAR_FUNC_FLOOR);
	BIND_CONSTANT(SCALAR_FUNC_ROUND);
	BIND_CONSTANT(SCALAR_FUNC_CEIL);
	BIND_CONSTANT(SCALAR_FUNC_FRAC);
	BIND_CONSTANT(SCALAR_FUNC_SATURATE);
	BIND_CONSTANT(SCALAR_FUNC_NEGATE);
	BIND_CONSTANT(SCALAR_MAX_FUNC);

	BIND_CONSTANT(VEC_FUNC_NORMALIZE);
	BIND_CONSTANT(VEC_FUNC_SATURATE);
	BIND_CONSTANT(VEC_FUNC_NEGATE);
	BIND_CONSTANT(VEC_FUNC_RECIPROCAL);
	BIND_CONSTANT(VEC_FUNC_RGB2HSV);
	BIND_CONSTANT(VEC_FUNC_HSV2RGB);
	BIND_CONSTANT(VEC_MAX_FUNC);

	ADD_SIGNAL(MethodInfo("updated"));

#if 0
	ObjectTypeDB::bind_method(_MD("node_add"),&ShaderGraph::node_add );
	ObjectTypeDB::bind_method(_MD("node_remove"),&ShaderGraph::node_remove );
	ObjectTypeDB::bind_method(_MD("node_set_param"),&ShaderGraph::node_set_param );
	ObjectTypeDB::bind_method(_MD("node_set_pos"),&ShaderGraph::node_set_pos );

	ObjectTypeDB::bind_method(_MD("node_get_pos"),&ShaderGraph::node_get_pos );
	ObjectTypeDB::bind_method(_MD("node_get_param"),&ShaderGraph::node_get_param);
	ObjectTypeDB::bind_method(_MD("node_get_type"),&ShaderGraph::node_get_type);

	ObjectTypeDB::bind_method(_MD("connect"),&ShaderGraph::connect );
	ObjectTypeDB::bind_method(_MD("disconnect"),&ShaderGraph::disconnect );

	ObjectTypeDB::bind_method(_MD("get_connections"),&ShaderGraph::_get_connections_helper );

	ObjectTypeDB::bind_method(_MD("clear"),&ShaderGraph::clear );

	BIND_CONSTANT( NODE_IN ); ///< param 0: name
	BIND_CONSTANT( NODE_OUT ); ///< param 0: name
	BIND_CONSTANT( NODE_CONSTANT ); ///< param 0: value
	BIND_CONSTANT( NODE_PARAMETER ); ///< param 0: name
	BIND_CONSTANT( NODE_ADD );
	BIND_CONSTANT( NODE_SUB );
	BIND_CONSTANT( NODE_MUL );
	BIND_CONSTANT( NODE_DIV );
	BIND_CONSTANT( NODE_MOD );
	BIND_CONSTANT( NODE_SIN );
	BIND_CONSTANT( NODE_COS );
	BIND_CONSTANT( NODE_TAN );
	BIND_CONSTANT( NODE_ARCSIN );
	BIND_CONSTANT( NODE_ARCCOS );
	BIND_CONSTANT( NODE_ARCTAN );
	BIND_CONSTANT( NODE_POW );
	BIND_CONSTANT( NODE_LOG );
	BIND_CONSTANT( NODE_MAX );
	BIND_CONSTANT( NODE_MIN );
	BIND_CONSTANT( NODE_COMPARE );
	BIND_CONSTANT( NODE_TEXTURE ); ///< param  0: texture
	BIND_CONSTANT( NODE_TIME ); ///< param  0: interval length
	BIND_CONSTANT( NODE_NOISE );
	BIND_CONSTANT( NODE_PASS );
	BIND_CONSTANT( NODE_VEC_IN ); ///< param 0: name
	BIND_CONSTANT( NODE_VEC_OUT ); ///< param 0: name
	BIND_CONSTANT( NODE_VEC_CONSTANT ); ///< param  0: value
	BIND_CONSTANT( NODE_VEC_PARAMETER ); ///< param  0: name
	BIND_CONSTANT( NODE_VEC_ADD );
	BIND_CONSTANT( NODE_VEC_SUB );
	BIND_CONSTANT( NODE_VEC_MUL );
	BIND_CONSTANT( NODE_VEC_DIV );
	BIND_CONSTANT( NODE_VEC_MOD );
	BIND_CONSTANT( NODE_VEC_CROSS );
	BIND_CONSTANT( NODE_VEC_DOT );
	BIND_CONSTANT( NODE_VEC_POW );
	BIND_CONSTANT( NODE_VEC_NORMALIZE );
	BIND_CONSTANT( NODE_VEC_TRANSFORM3 );
	BIND_CONSTANT( NODE_VEC_TRANSFORM4 );
	BIND_CONSTANT( NODE_VEC_COMPARE );
	BIND_CONSTANT( NODE_VEC_TEXTURE_2D );
	BIND_CONSTANT( NODE_VEC_TEXTURE_CUBE );
	BIND_CONSTANT( NODE_VEC_NOISE );
	BIND_CONSTANT( NODE_VEC_0 );
	BIND_CONSTANT( NODE_VEC_1 );
	BIND_CONSTANT( NODE_VEC_2 );
	BIND_CONSTANT( NODE_VEC_BUILD );
	BIND_CONSTANT( NODE_VEC_PASS );
	BIND_CONSTANT( NODE_COLOR_CONSTANT );
	BIND_CONSTANT( NODE_COLOR_PARAMETER );
	BIND_CONSTANT( NODE_TEXTURE_PARAMETER );
	BIND_CONSTANT( NODE_TEXTURE_2D_PARAMETER );
	BIND_CONSTANT( NODE_TEXTURE_CUBE_PARAMETER );
	BIND_CONSTANT( NODE_TYPE_MAX );
#endif
}

String ShaderGraph::_find_unique_name(const String &p_base) {

	int idx = 1;
	while (true) {
		String tocmp = p_base;
		if (idx > 1) {
			tocmp += "_" + itos(idx);
		}
		bool valid = true;
		for (int i = 0; i < 3; i++) {
			if (!valid)
				break;
			for (Map<int, Node>::Element *E = shader[i].node_map.front(); E; E = E->next()) {
				if (E->get().type != NODE_SCALAR_INPUT && E->get().type != NODE_VEC_INPUT && E->get().type == NODE_RGB_INPUT && E->get().type == NODE_XFORM_INPUT && E->get().type == NODE_TEXTURE_INPUT && E->get().type == NODE_CUBEMAP_INPUT)
					continue;
				String name = E->get().param1;
				if (name == tocmp) {
					valid = false;
					break;
				}
			}
		}

		if (!valid) {
			idx++;
			continue;
		}
		return tocmp;
	}
	return String();
}

void ShaderGraph::node_add(ShaderType p_type, NodeType p_node_type, int p_id) {

	ERR_FAIL_INDEX(p_type, 3);
	ERR_FAIL_COND(p_id == 0);
	ERR_FAIL_COND(p_node_type == NODE_OUTPUT); //can't create output
	ERR_FAIL_COND(shader[p_type].node_map.has(p_id));
	ERR_FAIL_INDEX(p_node_type, NODE_TYPE_MAX);
	Node node;

	if (p_node_type == NODE_INPUT) {
		//see if it already exists
		for (Map<int, Node>::Element *E = shader[p_type].node_map.front(); E; E = E->next()) {
			if (E->get().type == NODE_INPUT) {
				ERR_EXPLAIN("Only one input node can be added to the graph.");
				ERR_FAIL_COND(E->get().type == NODE_INPUT);
			}
		}
	}
	node.type = p_node_type;
	node.id = p_id;

	switch (p_node_type) {
		case NODE_INPUT: {
		} break; // all inputs (shader type dependent)
		case NODE_SCALAR_CONST: {
			node.param1 = 0;
		} break; //scalar constant
		case NODE_VEC_CONST: {
			node.param1 = Vector3();
		} break; //vec3 constant
		case NODE_RGB_CONST: {
			node.param1 = Color();
		} break; //rgb constant (shows a color picker instead)
		case NODE_XFORM_CONST: {
			node.param1 = Transform();
		} break; // 4x4 matrix constant
		case NODE_TIME: {
		} break; // time in seconds
		case NODE_SCREEN_TEX: {
			Array arr;
			arr.push_back(0);
			arr.push_back(0);
			node.param2 = arr;
		} break; // screen texture sampler (takes UV) (only usable in fragment shader)
		case NODE_SCALAR_OP: {
			node.param1 = SCALAR_OP_ADD;
		} break; // scalar vs scalar op (mul: {} break; add: {} break; div: {} break; etc)
		case NODE_VEC_OP: {
			node.param1 = VEC_OP_ADD;
		} break; // vec3 vs vec3 op (mul: {} break;ad: {} break;div: {} break;crossprod: {} break;etc)
		case NODE_VEC_SCALAR_OP: {
			node.param1 = VEC_SCALAR_OP_MUL;
		} break; // vec3 vs scalar op (mul: {} break; add: {} break; div: {} break; etc)
		case NODE_RGB_OP: {
			node.param1 = RGB_OP_SCREEN;
		} break; // vec3 vs vec3 rgb op (with scalar amount): {} break; like brighten: {} break; darken: {} break; burn: {} break; dodge: {} break; multiply: {} break; etc.
		case NODE_XFORM_MULT: {
		} break; // mat4 x mat4
		case NODE_XFORM_VEC_MULT: {
		} break; // mat4 x vec3 mult (with no-translation option)
		case NODE_XFORM_VEC_INV_MULT: {
		} break; // mat4 x vec3 inverse mult (with no-translation option)
		case NODE_SCALAR_FUNC: {
			node.param1 = SCALAR_FUNC_SIN;
		} break; // scalar function (sin: {} break; cos: {} break; etc)
		case NODE_VEC_FUNC: {
			node.param1 = VEC_FUNC_NORMALIZE;
		} break; // vector function (normalize: {} break; negate: {} break; reciprocal: {} break; rgb2hsv: {} break; hsv2rgb: {} break; etc: {} break; etc)
		case NODE_VEC_LEN: {
		} break; // vec3 length
		case NODE_DOT_PROD: {
		} break; // vec3 . vec3 (dot product -> scalar output)
		case NODE_VEC_TO_SCALAR: {
		} break; // 1 vec3 input: {} break; 3 scalar outputs
		case NODE_SCALAR_TO_VEC: {
		} break; // 3 scalar input: {} break; 1 vec3 output
		case NODE_VEC_TO_XFORM: {
		} break; // 3 scalar input: {} break; 1 vec3 output
		case NODE_XFORM_TO_VEC: {
		} break; // 3 scalar input: {} break; 1 vec3 output
		case NODE_SCALAR_INTERP: {
		} break; // scalar interpolation (with optional curve)
		case NODE_VEC_INTERP: {
		} break; // vec3 interpolation  (with optional curve)
		case NODE_COLOR_RAMP: {
			node.param1 = DVector<Color>();
			node.param2 = DVector<real_t>();
		} break; // vec3 interpolation  (with optional curve)
		case NODE_CURVE_MAP: {
			node.param1 = DVector<Vector2>();
		} break; // vec3 interpolation  (with optional curve)
		case NODE_SCALAR_INPUT: {
			node.param1 = _find_unique_name("Scalar");
			node.param2 = 0;
		} break; // scalar uniform (assignable in material)
		case NODE_VEC_INPUT: {
			node.param1 = _find_unique_name("Vec3");
			node.param2 = Vector3();
		} break; // vec3 uniform (assignable in material)
		case NODE_RGB_INPUT: {
			node.param1 = _find_unique_name("Color");
			node.param2 = Color();
		} break; // color uniform (assignable in material)
		case NODE_XFORM_INPUT: {
			node.param1 = _find_unique_name("XForm");
			node.param2 = Transform();
		} break; // mat4 uniform (assignable in material)
		case NODE_TEXTURE_INPUT: {
			node.param1 = _find_unique_name("Tex");
		} break; // texture input (assignable in material)
		case NODE_CUBEMAP_INPUT: {
			node.param1 = _find_unique_name("Cube");
		} break; // cubemap input (assignable in material)
		case NODE_DEFAULT_TEXTURE: {
		}; break;
		case NODE_OUTPUT: {
		} break; // output (shader type dependent)
		case NODE_COMMENT: {
		} break; // comment
		case NODE_TYPE_MAX: {
		};
	}

	shader[p_type].node_map[p_id] = node;
	_request_update();
}

void ShaderGraph::node_set_pos(ShaderType p_type, int p_id, const Vector2 &p_pos) {
	ERR_FAIL_INDEX(p_type, 3);

	ERR_FAIL_COND(!shader[p_type].node_map.has(p_id));
	shader[p_type].node_map[p_id].pos = p_pos;
	_request_update();
}
Vector2 ShaderGraph::node_get_pos(ShaderType p_type, int p_id) const {
	ERR_FAIL_INDEX_V(p_type, 3, Vector2());

	ERR_FAIL_COND_V(!shader[p_type].node_map.has(p_id), Vector2());
	return shader[p_type].node_map[p_id].pos;
}

void ShaderGraph::node_remove(ShaderType p_type, int p_id) {

	ERR_FAIL_COND(p_id == 0);
	ERR_FAIL_INDEX(p_type, 3);

	ERR_FAIL_COND(!shader[p_type].node_map.has(p_id));

	//erase connections associated with node
	for (Map<int, Node>::Element *E = shader[p_type].node_map.front(); E; E = E->next()) {
		if (E->key() == p_id)
			continue; //no self

		for (Map<int, SourceSlot>::Element *F = E->get().connections.front(); F;) {
			Map<int, SourceSlot>::Element *N = F->next();

			if (F->get().id == p_id) {
				E->get().connections.erase(F);
			}

			F = N;
		}
	}

	shader[p_type].node_map.erase(p_id);

	_request_update();
}

void ShaderGraph::get_node_list(ShaderType p_type, List<int> *p_node_list) const {

	ERR_FAIL_INDEX(p_type, 3);

	Map<int, Node>::Element *E = shader[p_type].node_map.front();

	while (E) {

		p_node_list->push_back(E->key());
		E = E->next();
	}
}

ShaderGraph::NodeType ShaderGraph::node_get_type(ShaderType p_type, int p_id) const {

	ERR_FAIL_INDEX_V(p_type, 3, NODE_TYPE_MAX);

	ERR_FAIL_COND_V(!shader[p_type].node_map.has(p_id), NODE_TYPE_MAX);
	return shader[p_type].node_map[p_id].type;
}

Error ShaderGraph::connect_node(ShaderType p_type, int p_src_id, int p_src_slot, int p_dst_id, int p_dst_slot) {
	ERR_FAIL_INDEX_V(p_type, 3, ERR_INVALID_PARAMETER);

	ERR_FAIL_COND_V(p_src_id == p_dst_id, ERR_INVALID_PARAMETER);
	ERR_FAIL_COND_V(!shader[p_type].node_map.has(p_src_id), ERR_INVALID_PARAMETER);
	ERR_FAIL_COND_V(!shader[p_type].node_map.has(p_dst_id), ERR_INVALID_PARAMETER);
	NodeType type_src = shader[p_type].node_map[p_src_id].type;
	NodeType type_dst = shader[p_type].node_map[p_dst_id].type;
	ERR_FAIL_INDEX_V(p_src_slot, get_node_output_slot_count(get_mode(), p_type, type_src), ERR_INVALID_PARAMETER);
	ERR_FAIL_INDEX_V(p_dst_slot, get_node_input_slot_count(get_mode(), p_type, type_dst), ERR_INVALID_PARAMETER);
	ERR_FAIL_COND_V(get_node_output_slot_type(get_mode(), p_type, type_src, p_src_slot) != get_node_input_slot_type(get_mode(), p_type, type_dst, p_dst_slot), ERR_INVALID_PARAMETER);

	SourceSlot ts;
	ts.id = p_src_id;
	ts.slot = p_src_slot;
	shader[p_type].node_map[p_dst_id].connections[p_dst_slot] = ts;
	_request_update();

	return OK;
}

bool ShaderGraph::is_node_connected(ShaderType p_type, int p_src_id, int p_src_slot, int p_dst_id, int p_dst_slot) const {

	ERR_FAIL_INDEX_V(p_type, 3, false);

	SourceSlot ts;
	ts.id = p_src_id;
	ts.slot = p_src_slot;
	return shader[p_type].node_map.has(p_dst_id) && shader[p_type].node_map[p_dst_id].connections.has(p_dst_slot) &&
		   shader[p_type].node_map[p_dst_id].connections[p_dst_slot] == ts;
}

void ShaderGraph::disconnect_node(ShaderType p_type, int p_src_id, int p_src_slot, int p_dst_id, int p_dst_slot) {
	ERR_FAIL_INDEX(p_type, 3);

	SourceSlot ts;
	ts.id = p_src_id;
	ts.slot = p_src_slot;
	if (shader[p_type].node_map.has(p_dst_id) && shader[p_type].node_map[p_dst_id].connections.has(p_dst_slot) &&
			shader[p_type].node_map[p_dst_id].connections[p_dst_slot] == ts) {
		shader[p_type].node_map[p_dst_id].connections.erase(p_dst_slot);
	}
	_request_update();
}

void ShaderGraph::get_node_connections(ShaderType p_type, List<Connection> *p_connections) const {

	ERR_FAIL_INDEX(p_type, 3);

	for (const Map<int, Node>::Element *E = shader[p_type].node_map.front(); E; E = E->next()) {
		for (const Map<int, SourceSlot>::Element *F = E->get().connections.front(); F; F = F->next()) {

			Connection c;
			c.dst_id = E->key();
			c.dst_slot = F->key();
			c.src_id = F->get().id;
			c.src_slot = F->get().slot;
			p_connections->push_back(c);
		}
	}
}

bool ShaderGraph::is_slot_connected(ShaderGraph::ShaderType p_type, int p_dst_id, int slot_id) {
	for (const Map<int, Node>::Element *E = shader[p_type].node_map.front(); E; E = E->next()) {
		for (const Map<int, SourceSlot>::Element *F = E->get().connections.front(); F; F = F->next()) {

			if (p_dst_id == E->key() && slot_id == F->key())
				return true;
		}
	}
	return false;
}

void ShaderGraph::clear(ShaderType p_type) {

	ERR_FAIL_INDEX(p_type, 3);
	shader[p_type].node_map.clear();
	Node out;
	out.pos = Vector2(300, 300);
	out.type = NODE_OUTPUT;
	shader[p_type].node_map.insert(0, out);

	_request_update();
}

void ShaderGraph::scalar_const_node_set_value(ShaderType p_type, int p_id, float p_value) {

	ERR_FAIL_INDEX(p_type, 3);
	ERR_FAIL_COND(!shader[p_type].node_map.has(p_id));
	Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND(n.type != NODE_SCALAR_CONST);
	n.param1 = p_value;
	_request_update();
}

float ShaderGraph::scalar_const_node_get_value(ShaderType p_type, int p_id) const {

	ERR_FAIL_INDEX_V(p_type, 3, 0);
	ERR_FAIL_COND_V(!shader[p_type].node_map.has(p_id), 0);
	const Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND_V(n.type != NODE_SCALAR_CONST, 0);
	return n.param1;
}

void ShaderGraph::vec_const_node_set_value(ShaderType p_type, int p_id, const Vector3 &p_value) {

	ERR_FAIL_INDEX(p_type, 3);
	ERR_FAIL_COND(!shader[p_type].node_map.has(p_id));
	Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND(n.type != NODE_VEC_CONST);
	n.param1 = p_value;
	_request_update();
}
Vector3 ShaderGraph::vec_const_node_get_value(ShaderType p_type, int p_id) const {

	ERR_FAIL_INDEX_V(p_type, 3, Vector3());
	ERR_FAIL_COND_V(!shader[p_type].node_map.has(p_id), Vector3());
	const Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND_V(n.type != NODE_VEC_CONST, Vector3());
	return n.param1;
}

void ShaderGraph::rgb_const_node_set_value(ShaderType p_type, int p_id, const Color &p_value) {

	ERR_FAIL_INDEX(p_type, 3);
	ERR_FAIL_COND(!shader[p_type].node_map.has(p_id));
	Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND(n.type != NODE_RGB_CONST);
	n.param1 = p_value;
	_request_update();
}
Color ShaderGraph::rgb_const_node_get_value(ShaderType p_type, int p_id) const {

	ERR_FAIL_INDEX_V(p_type, 3, Color());
	ERR_FAIL_COND_V(!shader[p_type].node_map.has(p_id), Color());
	const Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND_V(n.type != NODE_RGB_CONST, Color());
	return n.param1;
}

void ShaderGraph::xform_const_node_set_value(ShaderType p_type, int p_id, const Transform &p_value) {

	ERR_FAIL_INDEX(p_type, 3);
	ERR_FAIL_COND(!shader[p_type].node_map.has(p_id));
	Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND(n.type != NODE_XFORM_CONST);
	n.param1 = p_value;
	_request_update();
}
Transform ShaderGraph::xform_const_node_get_value(ShaderType p_type, int p_id) const {

	ERR_FAIL_INDEX_V(p_type, 3, Transform());
	ERR_FAIL_COND_V(!shader[p_type].node_map.has(p_id), Transform());
	const Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND_V(n.type != NODE_XFORM_CONST, Transform());
	return n.param1;
}

void ShaderGraph::texture_node_set_filter_size(ShaderType p_type, int p_id, int p_size) {

	ERR_FAIL_INDEX(p_type, 3);
	ERR_FAIL_COND(!shader[p_type].node_map.has(p_id));
	Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND(n.type != NODE_TEXTURE_INPUT && n.type != NODE_SCREEN_TEX);
	Array arr = n.param2;
	arr[0] = p_size;
	n.param2 = arr;
	_request_update();
}
int ShaderGraph::texture_node_get_filter_size(ShaderType p_type, int p_id) const {

	ERR_FAIL_INDEX_V(p_type, 3, 0);
	ERR_FAIL_COND_V(!shader[p_type].node_map.has(p_id), 0);
	const Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND_V(n.type != NODE_TEXTURE_INPUT && n.type != NODE_SCREEN_TEX, 0);
	Array arr = n.param2;
	return arr[0];
}

void ShaderGraph::texture_node_set_filter_strength(ShaderType p_type, float p_id, float p_strength) {

	ERR_FAIL_INDEX(p_type, 3);
	ERR_FAIL_COND(!shader[p_type].node_map.has(p_id));
	Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND(n.type != NODE_TEXTURE_INPUT && n.type != NODE_SCREEN_TEX);
	Array arr = n.param2;
	arr[1] = p_strength;
	n.param2 = arr;
	_request_update();
}
float ShaderGraph::texture_node_get_filter_strength(ShaderType p_type, float p_id) const {

	ERR_FAIL_INDEX_V(p_type, 3, 0);
	ERR_FAIL_COND_V(!shader[p_type].node_map.has(p_id), 0);
	const Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND_V(n.type != NODE_TEXTURE_INPUT && n.type != NODE_SCREEN_TEX, 0);
	Array arr = n.param2;
	return arr[1];
}

void ShaderGraph::duplicate_nodes(ShaderType p_which, List<int> &p_nodes) {
	//Create new node IDs
	Map<int, int> duplicates = Map<int, int>();
	int i = 1;
	for (List<int>::Element *E = p_nodes.front(); E; E = E->next()) {
		while (shader[p_which].node_map.has(i))
			i++;
		duplicates.insert(E->get(), i);
		i++;
	}

	for (List<int>::Element *E = p_nodes.front(); E; E = E->next()) {

		const Node &n = shader[p_which].node_map[E->get()];
		Node nn = n;
		nn.id = duplicates.find(n.id)->get();
		nn.pos += Vector2(0, 100);
		for (Map<int, SourceSlot>::Element *C = nn.connections.front(); C; C = C->next()) {
			SourceSlot &c = C->get();
			if (p_nodes.find(c.id))
				c.id = duplicates.find(c.id)->get();
		}
		shader[p_which].node_map[nn.id] = nn;
	}
	_request_update();
}

List<int> ShaderGraph::generate_ids(ShaderType p_type, int count) {
	List<int> ids = List<int>();
	int i = 1;
	while (ids.size() < count) {
		while (shader[p_type].node_map.has(i))
			i++;
		ids.push_back(i);
		i++;
	}
	return ids;
}

void ShaderGraph::scalar_op_node_set_op(ShaderType p_type, float p_id, ScalarOp p_op) {

	ERR_FAIL_INDEX(p_type, 3);
	ERR_FAIL_COND(!shader[p_type].node_map.has(p_id));
	Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND(n.type != NODE_SCALAR_OP);
	n.param1 = p_op;
	_request_update();
}
ShaderGraph::ScalarOp ShaderGraph::scalar_op_node_get_op(ShaderType p_type, float p_id) const {

	ERR_FAIL_INDEX_V(p_type, 3, SCALAR_MAX_OP);
	ERR_FAIL_COND_V(!shader[p_type].node_map.has(p_id), SCALAR_MAX_OP);
	const Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND_V(n.type != NODE_SCALAR_OP, SCALAR_MAX_OP);
	int op = n.param1;
	return ScalarOp(op);
}

void ShaderGraph::vec_op_node_set_op(ShaderType p_type, float p_id, VecOp p_op) {

	ERR_FAIL_INDEX(p_type, 3);
	ERR_FAIL_COND(!shader[p_type].node_map.has(p_id));
	Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND(n.type != NODE_VEC_OP);
	n.param1 = p_op;
	_request_update();
}
ShaderGraph::VecOp ShaderGraph::vec_op_node_get_op(ShaderType p_type, float p_id) const {

	ERR_FAIL_INDEX_V(p_type, 3, VEC_MAX_OP);
	ERR_FAIL_COND_V(!shader[p_type].node_map.has(p_id), VEC_MAX_OP);
	const Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND_V(n.type != NODE_VEC_OP, VEC_MAX_OP);
	int op = n.param1;
	return VecOp(op);
}

void ShaderGraph::vec_scalar_op_node_set_op(ShaderType p_type, float p_id, VecScalarOp p_op) {

	ERR_FAIL_INDEX(p_type, 3);
	ERR_FAIL_COND(!shader[p_type].node_map.has(p_id));
	Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND(n.type != NODE_VEC_SCALAR_OP);
	n.param1 = p_op;
	_request_update();
}
ShaderGraph::VecScalarOp ShaderGraph::vec_scalar_op_node_get_op(ShaderType p_type, float p_id) const {

	ERR_FAIL_INDEX_V(p_type, 3, VEC_SCALAR_MAX_OP);
	ERR_FAIL_COND_V(!shader[p_type].node_map.has(p_id), VEC_SCALAR_MAX_OP);
	const Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND_V(n.type != NODE_VEC_SCALAR_OP, VEC_SCALAR_MAX_OP);
	int op = n.param1;
	return VecScalarOp(op);
}

void ShaderGraph::rgb_op_node_set_op(ShaderType p_type, float p_id, RGBOp p_op) {

	ERR_FAIL_INDEX(p_type, 3);
	ERR_FAIL_COND(!shader[p_type].node_map.has(p_id));
	Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND(n.type != NODE_RGB_OP);
	n.param1 = p_op;

	_request_update();
}
ShaderGraph::RGBOp ShaderGraph::rgb_op_node_get_op(ShaderType p_type, float p_id) const {

	ERR_FAIL_INDEX_V(p_type, 3, RGB_MAX_OP);
	ERR_FAIL_COND_V(!shader[p_type].node_map.has(p_id), RGB_MAX_OP);
	const Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND_V(n.type != NODE_RGB_OP, RGB_MAX_OP);
	int op = n.param1;
	return RGBOp(op);
}

void ShaderGraph::xform_vec_mult_node_set_no_translation(ShaderType p_type, int p_id, bool p_no_translation) {

	ERR_FAIL_INDEX(p_type, 3);
	ERR_FAIL_COND(!shader[p_type].node_map.has(p_id));
	Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND(n.type != NODE_XFORM_VEC_MULT && n.type != NODE_XFORM_VEC_INV_MULT);
	n.param1 = p_no_translation;
	_request_update();
}
bool ShaderGraph::xform_vec_mult_node_get_no_translation(ShaderType p_type, int p_id) const {

	ERR_FAIL_INDEX_V(p_type, 3, false);
	ERR_FAIL_COND_V(!shader[p_type].node_map.has(p_id), false);
	const Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND_V(n.type != NODE_XFORM_VEC_MULT && n.type != NODE_XFORM_VEC_INV_MULT, false);
	return n.param1;
}

void ShaderGraph::scalar_func_node_set_function(ShaderType p_type, int p_id, ScalarFunc p_func) {

	ERR_FAIL_INDEX(p_type, 3);
	ERR_FAIL_COND(!shader[p_type].node_map.has(p_id));
	Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND(n.type != NODE_SCALAR_FUNC);
	int func = p_func;
	ERR_FAIL_INDEX(func, SCALAR_MAX_FUNC);
	n.param1 = func;
	_request_update();
}
ShaderGraph::ScalarFunc ShaderGraph::scalar_func_node_get_function(ShaderType p_type, int p_id) const {

	ERR_FAIL_INDEX_V(p_type, 3, SCALAR_MAX_FUNC);
	ERR_FAIL_COND_V(!shader[p_type].node_map.has(p_id), SCALAR_MAX_FUNC);
	const Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND_V(n.type != NODE_SCALAR_FUNC, SCALAR_MAX_FUNC);
	int func = n.param1;
	return ScalarFunc(func);
}

void ShaderGraph::default_set_value(ShaderGraph::ShaderType p_which, int p_id, int p_param, const Variant &p_value) {
	ERR_FAIL_INDEX(p_which, 3);
	ERR_FAIL_COND(!shader[p_which].node_map.has(p_id));
	Node &n = shader[p_which].node_map[p_id];
	if (p_value.get_type() == Variant::NIL)
		n.defaults.erase(n.defaults.find(p_param));
	else
		n.defaults[p_param] = p_value;

	_request_update();
}

Variant ShaderGraph::default_get_value(ShaderGraph::ShaderType p_which, int p_id, int p_param) {
	ERR_FAIL_INDEX_V(p_which, 3, Variant());
	ERR_FAIL_COND_V(!shader[p_which].node_map.has(p_id), Variant());
	const Node &n = shader[p_which].node_map[p_id];

	if (!n.defaults.has(p_param))
		return Variant();
	return n.defaults[p_param];
}

void ShaderGraph::vec_func_node_set_function(ShaderType p_type, int p_id, VecFunc p_func) {

	ERR_FAIL_INDEX(p_type, 3);
	ERR_FAIL_COND(!shader[p_type].node_map.has(p_id));
	Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND(n.type != NODE_VEC_FUNC);
	int func = p_func;
	ERR_FAIL_INDEX(func, VEC_MAX_FUNC);
	n.param1 = func;

	_request_update();
}
ShaderGraph::VecFunc ShaderGraph::vec_func_node_get_function(ShaderType p_type, int p_id) const {

	ERR_FAIL_INDEX_V(p_type, 3, VEC_MAX_FUNC);
	ERR_FAIL_COND_V(!shader[p_type].node_map.has(p_id), VEC_MAX_FUNC);
	const Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND_V(n.type != NODE_VEC_FUNC, VEC_MAX_FUNC);
	int func = n.param1;
	return VecFunc(func);
}

void ShaderGraph::color_ramp_node_set_ramp(ShaderType p_type, int p_id, const DVector<Color> &p_colors, const DVector<real_t> &p_offsets) {

	ERR_FAIL_INDEX(p_type, 3);
	ERR_FAIL_COND(!shader[p_type].node_map.has(p_id));
	ERR_FAIL_COND(p_colors.size() != p_offsets.size());
	Node &n = shader[p_type].node_map[p_id];
	n.param1 = p_colors;
	n.param2 = p_offsets;
	_request_update();
}

DVector<Color> ShaderGraph::color_ramp_node_get_colors(ShaderType p_type, int p_id) const {

	ERR_FAIL_INDEX_V(p_type, 3, DVector<Color>());
	ERR_FAIL_COND_V(!shader[p_type].node_map.has(p_id), DVector<Color>());
	const Node &n = shader[p_type].node_map[p_id];
	return n.param1;
}

DVector<real_t> ShaderGraph::color_ramp_node_get_offsets(ShaderType p_type, int p_id) const {

	ERR_FAIL_INDEX_V(p_type, 3, DVector<real_t>());
	ERR_FAIL_COND_V(!shader[p_type].node_map.has(p_id), DVector<real_t>());
	const Node &n = shader[p_type].node_map[p_id];
	return n.param2;
}

void ShaderGraph::curve_map_node_set_points(ShaderType p_type, int p_id, const DVector<Vector2> &p_points) {

	ERR_FAIL_INDEX(p_type, 3);
	ERR_FAIL_COND(!shader[p_type].node_map.has(p_id));
	Node &n = shader[p_type].node_map[p_id];
	n.param1 = p_points;
	_request_update();
}

DVector<Vector2> ShaderGraph::curve_map_node_get_points(ShaderType p_type, int p_id) const {

	ERR_FAIL_INDEX_V(p_type, 3, DVector<Vector2>());
	ERR_FAIL_COND_V(!shader[p_type].node_map.has(p_id), DVector<Vector2>());
	const Node &n = shader[p_type].node_map[p_id];
	return n.param1;
}

void ShaderGraph::input_node_set_name(ShaderType p_type, int p_id, const String &p_name) {

	ERR_FAIL_INDEX(p_type, 3);
	ERR_FAIL_COND(!shader[p_type].node_map.has(p_id));
	ERR_FAIL_COND(!p_name.is_valid_identifier());
	Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND(n.type != NODE_SCALAR_INPUT && n.type != NODE_VEC_INPUT && n.type == NODE_RGB_INPUT && n.type == NODE_XFORM_INPUT && n.type == NODE_TEXTURE_INPUT && n.type == NODE_CUBEMAP_INPUT);

	n.param1 = "";
	n.param1 = _find_unique_name(p_name);
	_request_update();
}
String ShaderGraph::input_node_get_name(ShaderType p_type, int p_id) {

	ERR_FAIL_INDEX_V(p_type, 3, String());
	ERR_FAIL_COND_V(!shader[p_type].node_map.has(p_id), String());
	const Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND_V(n.type != NODE_SCALAR_INPUT && n.type != NODE_VEC_INPUT && n.type == NODE_RGB_INPUT && n.type == NODE_XFORM_INPUT && n.type == NODE_TEXTURE_INPUT && n.type == NODE_CUBEMAP_INPUT, String());
	return n.param1;
}

void ShaderGraph::scalar_input_node_set_value(ShaderType p_type, int p_id, float p_value) {

	ERR_FAIL_INDEX(p_type, 3);
	ERR_FAIL_COND(!shader[p_type].node_map.has(p_id));
	Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND(n.type != NODE_SCALAR_INPUT);
	n.param2 = p_value;
	_request_update();
}

float ShaderGraph::scalar_input_node_get_value(ShaderType p_type, int p_id) const {

	ERR_FAIL_INDEX_V(p_type, 3, 0);
	ERR_FAIL_COND_V(!shader[p_type].node_map.has(p_id), 0);
	const Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND_V(n.type != NODE_SCALAR_INPUT, 0);

	return n.param2;
}

void ShaderGraph::vec_input_node_set_value(ShaderType p_type, int p_id, const Vector3 &p_value) {

	ERR_FAIL_INDEX(p_type, 3);
	ERR_FAIL_COND(!shader[p_type].node_map.has(p_id));
	Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND(n.type != NODE_VEC_INPUT);

	n.param2 = p_value;
	_request_update();
}
Vector3 ShaderGraph::vec_input_node_get_value(ShaderType p_type, int p_id) const {

	ERR_FAIL_INDEX_V(p_type, 3, Vector3());
	ERR_FAIL_COND_V(!shader[p_type].node_map.has(p_id), Vector3());
	const Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND_V(n.type != NODE_VEC_INPUT, Vector3());
	return n.param2;
}

void ShaderGraph::rgb_input_node_set_value(ShaderType p_type, int p_id, const Color &p_value) {

	ERR_FAIL_INDEX(p_type, 3);
	ERR_FAIL_COND(!shader[p_type].node_map.has(p_id));
	Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND(n.type != NODE_RGB_INPUT);
	n.param2 = p_value;
	_request_update();
}
Color ShaderGraph::rgb_input_node_get_value(ShaderType p_type, int p_id) const {

	ERR_FAIL_INDEX_V(p_type, 3, Color());
	ERR_FAIL_COND_V(!shader[p_type].node_map.has(p_id), Color());
	const Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND_V(n.type != NODE_RGB_INPUT, Color());
	return n.param2;
}

void ShaderGraph::xform_input_node_set_value(ShaderType p_type, int p_id, const Transform &p_value) {

	ERR_FAIL_INDEX(p_type, 3);
	ERR_FAIL_COND(!shader[p_type].node_map.has(p_id));
	Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND(n.type != NODE_XFORM_INPUT);
	n.param2 = p_value;
	_request_update();
}
Transform ShaderGraph::xform_input_node_get_value(ShaderType p_type, int p_id) const {

	ERR_FAIL_INDEX_V(p_type, 3, Transform());
	ERR_FAIL_COND_V(!shader[p_type].node_map.has(p_id), Transform());
	const Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND_V(n.type != NODE_XFORM_INPUT, Transform());
	return n.param2;
}

void ShaderGraph::texture_input_node_set_value(ShaderType p_type, int p_id, const Ref<Texture> &p_texture) {

	ERR_FAIL_INDEX(p_type, 3);
	ERR_FAIL_COND(!shader[p_type].node_map.has(p_id));
	Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND(n.type != NODE_TEXTURE_INPUT);
	n.param2 = p_texture;
	_request_update();
}

Ref<Texture> ShaderGraph::texture_input_node_get_value(ShaderType p_type, int p_id) const {

	ERR_FAIL_INDEX_V(p_type, 3, Ref<Texture>());
	ERR_FAIL_COND_V(!shader[p_type].node_map.has(p_id), Ref<Texture>());
	const Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND_V(n.type != NODE_TEXTURE_INPUT, Ref<Texture>());
	return n.param2;
}

void ShaderGraph::cubemap_input_node_set_value(ShaderType p_type, int p_id, const Ref<CubeMap> &p_cubemap) {

	ERR_FAIL_INDEX(p_type, 3);
	ERR_FAIL_COND(!shader[p_type].node_map.has(p_id));
	Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND(n.type != NODE_CUBEMAP_INPUT);
	n.param2 = p_cubemap;
	_request_update();
}

Ref<CubeMap> ShaderGraph::cubemap_input_node_get_value(ShaderType p_type, int p_id) const {

	ERR_FAIL_INDEX_V(p_type, 3, Ref<CubeMap>());
	ERR_FAIL_COND_V(!shader[p_type].node_map.has(p_id), Ref<CubeMap>());
	const Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND_V(n.type != NODE_CUBEMAP_INPUT, Ref<CubeMap>());
	return n.param2;
}

void ShaderGraph::comment_node_set_text(ShaderType p_type, int p_id, const String &p_comment) {

	ERR_FAIL_INDEX(p_type, 3);
	ERR_FAIL_COND(!shader[p_type].node_map.has(p_id));
	Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND(n.type != NODE_COMMENT);
	n.param1 = p_comment;
}

String ShaderGraph::comment_node_get_text(ShaderType p_type, int p_id) const {

	ERR_FAIL_INDEX_V(p_type, 3, String());
	ERR_FAIL_COND_V(!shader[p_type].node_map.has(p_id), String());
	const Node &n = shader[p_type].node_map[p_id];
	ERR_FAIL_COND_V(n.type != NODE_COMMENT, String());
	return n.param1;
}

void ShaderGraph::_request_update() {

	if (_pending_update_shader)
		return;

	_pending_update_shader = true;
	call_deferred("_update_shader");
}

Variant ShaderGraph::node_get_state(ShaderType p_type, int p_id) const {

	ERR_FAIL_INDEX_V(p_type, 3, Variant());
	ERR_FAIL_COND_V(!shader[p_type].node_map.has(p_id), Variant());
	const Node &n = shader[p_type].node_map[p_id];
	Dictionary s;
	s["pos"] = n.pos;
	s["param1"] = n.param1;
	s["param2"] = n.param2;
	Array keys;
	for (Map<int, Variant>::Element *E = n.defaults.front(); E; E = E->next()) {
		keys.append(E->key());
		s[E->key()] = E->get();
	}
	s["default_keys"] = keys;
	return s;
}
void ShaderGraph::node_set_state(ShaderType p_type, int p_id, const Variant &p_state) {

	ERR_FAIL_INDEX(p_type, 3);
	ERR_FAIL_COND(!shader[p_type].node_map.has(p_id));
	Node &n = shader[p_type].node_map[p_id];
	Dictionary d = p_state;
	ERR_FAIL_COND(!d.has("pos"));
	ERR_FAIL_COND(!d.has("param1"));
	ERR_FAIL_COND(!d.has("param2"));
	ERR_FAIL_COND(!d.has("default_keys"));

	n.pos = d["pos"];
	n.param1 = d["param1"];
	n.param2 = d["param2"];
	Array keys = d["default_keys"];
	for (int i = 0; i < keys.size(); i++) {
		n.defaults[keys[i]] = d[keys[i]];
	}
}

ShaderGraph::ShaderGraph(Mode p_mode) :
		Shader(p_mode) {

	//shader = VisualServer::get_singleton()->shader_create();
	_pending_update_shader = false;

	Node input;
	input.id = 1;
	input.pos = Vector2(50, 40);
	input.type = NODE_INPUT;

	Node output;
	output.id = 0;
	output.pos = Vector2(350, 40);
	output.type = NODE_OUTPUT;

	for (int i = 0; i < 3; i++) {

		shader[i].node_map.insert(0, output);
		shader[i].node_map.insert(1, input);
	}
}

ShaderGraph::~ShaderGraph() {

	//VisualServer::get_singleton()->free(shader);
}

const ShaderGraph::InOutParamInfo ShaderGraph::inout_param_info[] = {
	//material vertex in
	{ MODE_MATERIAL, SHADER_TYPE_VERTEX, "Vertex", "SRC_VERTEX", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_MATERIAL, SHADER_TYPE_VERTEX, "Normal", "SRC_NORMAL", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_MATERIAL, SHADER_TYPE_VERTEX, "Tangent", "SRC_TANGENT", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_MATERIAL, SHADER_TYPE_VERTEX, "BinormalF", "SRC_BINORMALF", "", SLOT_TYPE_SCALAR, SLOT_IN },
	{ MODE_MATERIAL, SHADER_TYPE_VERTEX, "Color", "SRC_COLOR", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_MATERIAL, SHADER_TYPE_VERTEX, "Alpha", "SRC_ALPHA", "", SLOT_TYPE_SCALAR, SLOT_IN },
	{ MODE_MATERIAL, SHADER_TYPE_VERTEX, "UV", "SRC_UV", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_MATERIAL, SHADER_TYPE_VERTEX, "UV2", "SRC_UV2", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_MATERIAL, SHADER_TYPE_VERTEX, "WorldMatrix", "WORLD_MATRIX", "", SLOT_TYPE_XFORM, SLOT_IN },
	{ MODE_MATERIAL, SHADER_TYPE_VERTEX, "InvCameraMatrix", "INV_CAMERA_MATRIX", "", SLOT_TYPE_XFORM, SLOT_IN },
	{ MODE_MATERIAL, SHADER_TYPE_VERTEX, "ProjectionMatrix", "PROJECTION_MATRIX", "", SLOT_TYPE_XFORM, SLOT_IN },
	{ MODE_MATERIAL, SHADER_TYPE_VERTEX, "ModelviewMatrix", "MODELVIEW_MATRIX", "", SLOT_TYPE_XFORM, SLOT_IN },
	{ MODE_MATERIAL, SHADER_TYPE_VERTEX, "InstanceID", "INSTANCE_ID", "", SLOT_TYPE_SCALAR, SLOT_IN },

	//material vertex out
	{ MODE_MATERIAL, SHADER_TYPE_VERTEX, "Vertex", "VERTEX", "", SLOT_TYPE_VEC, SLOT_OUT },
	{ MODE_MATERIAL, SHADER_TYPE_VERTEX, "Normal", "NORMAL", "", SLOT_TYPE_VEC, SLOT_OUT },
	{ MODE_MATERIAL, SHADER_TYPE_VERTEX, "Tangent", "TANGENT", "", SLOT_TYPE_VEC, SLOT_OUT },
	{ MODE_MATERIAL, SHADER_TYPE_VERTEX, "Binormal", "BINORMAL", "", SLOT_TYPE_VEC, SLOT_OUT },
	{ MODE_MATERIAL, SHADER_TYPE_VERTEX, "UV", "UV", ".xy", SLOT_TYPE_VEC, SLOT_OUT },
	{ MODE_MATERIAL, SHADER_TYPE_VERTEX, "UV2", "UV2", ".xy", SLOT_TYPE_VEC, SLOT_OUT },
	{ MODE_MATERIAL, SHADER_TYPE_VERTEX, "Color", "COLOR.rgb", "", SLOT_TYPE_VEC, SLOT_OUT },
	{ MODE_MATERIAL, SHADER_TYPE_VERTEX, "Alpha", "COLOR.a", "", SLOT_TYPE_SCALAR, SLOT_OUT },
	{ MODE_MATERIAL, SHADER_TYPE_VERTEX, "Var1", "VAR1.rgb", "", SLOT_TYPE_VEC, SLOT_OUT },
	{ MODE_MATERIAL, SHADER_TYPE_VERTEX, "Var2", "VAR2.rgb", "", SLOT_TYPE_VEC, SLOT_OUT },
	{ MODE_MATERIAL, SHADER_TYPE_VERTEX, "SpecExp", "SPEC_EXP", "", SLOT_TYPE_SCALAR, SLOT_OUT },
	{ MODE_MATERIAL, SHADER_TYPE_VERTEX, "PointSize", "POINT_SIZE", "", SLOT_TYPE_SCALAR, SLOT_OUT },
	//pixel vertex in
	{ MODE_MATERIAL, SHADER_TYPE_FRAGMENT, "Vertex", "VERTEX", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_MATERIAL, SHADER_TYPE_FRAGMENT, "Position", "POSITION.xyz", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_MATERIAL, SHADER_TYPE_FRAGMENT, "Normal", "IN_NORMAL", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_MATERIAL, SHADER_TYPE_FRAGMENT, "Tangent", "TANGENT", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_MATERIAL, SHADER_TYPE_FRAGMENT, "Binormal", "BINORMAL", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_MATERIAL, SHADER_TYPE_FRAGMENT, "UV", "vec3(UV,0)", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_MATERIAL, SHADER_TYPE_FRAGMENT, "UV2", "vec3(UV2,0)", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_MATERIAL, SHADER_TYPE_FRAGMENT, "UVScreen", "vec3(SCREEN_UV,0)", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_MATERIAL, SHADER_TYPE_FRAGMENT, "PointCoord", "POINT_COORD", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_MATERIAL, SHADER_TYPE_FRAGMENT, "Color", "COLOR.rgb", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_MATERIAL, SHADER_TYPE_FRAGMENT, "Alpha", "COLOR.a", "", SLOT_TYPE_SCALAR, SLOT_IN },
	{ MODE_MATERIAL, SHADER_TYPE_FRAGMENT, "InvCameraMatrix", "INV_CAMERA_MATRIX", "", SLOT_TYPE_XFORM, SLOT_IN },
	{ MODE_MATERIAL, SHADER_TYPE_FRAGMENT, "Var1", "VAR1.rgb", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_MATERIAL, SHADER_TYPE_FRAGMENT, "Var2", "VAR2.rgb", "", SLOT_TYPE_VEC, SLOT_IN },
	//pixel vertex out
	{ MODE_MATERIAL, SHADER_TYPE_FRAGMENT, "Diffuse", "DIFFUSE_OUT", "", SLOT_TYPE_VEC, SLOT_OUT },
	{ MODE_MATERIAL, SHADER_TYPE_FRAGMENT, "DiffuseAlpha", "ALPHA_OUT", "", SLOT_TYPE_SCALAR, SLOT_OUT },
	{ MODE_MATERIAL, SHADER_TYPE_FRAGMENT, "Specular", "SPECULAR", "", SLOT_TYPE_VEC, SLOT_OUT },
	{ MODE_MATERIAL, SHADER_TYPE_FRAGMENT, "SpecularExp", "SPEC_EXP", "", SLOT_TYPE_SCALAR, SLOT_OUT },
	{ MODE_MATERIAL, SHADER_TYPE_FRAGMENT, "Emission", "EMISSION", "", SLOT_TYPE_VEC, SLOT_OUT },
	{ MODE_MATERIAL, SHADER_TYPE_FRAGMENT, "Glow", "GLOW", "", SLOT_TYPE_SCALAR, SLOT_OUT },
	{ MODE_MATERIAL, SHADER_TYPE_FRAGMENT, "ShadeParam", "SHADE_PARAM", "", SLOT_TYPE_SCALAR, SLOT_OUT },
	{ MODE_MATERIAL, SHADER_TYPE_FRAGMENT, "Normal", "NORMAL", "", SLOT_TYPE_VEC, SLOT_OUT },
	{ MODE_MATERIAL, SHADER_TYPE_FRAGMENT, "NormalMap", "NORMALMAP", "", SLOT_TYPE_VEC, SLOT_OUT },
	{ MODE_MATERIAL, SHADER_TYPE_FRAGMENT, "NormalMapDepth", "NORMALMAP_DEPTH", "", SLOT_TYPE_SCALAR, SLOT_OUT },
	{ MODE_MATERIAL, SHADER_TYPE_FRAGMENT, "Discard", "DISCARD", ">0.5", SLOT_TYPE_SCALAR, SLOT_OUT },
	//light in
	{ MODE_MATERIAL, SHADER_TYPE_LIGHT, "Normal", "NORMAL", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_MATERIAL, SHADER_TYPE_LIGHT, "LightDir", "LIGHT_DIR", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_MATERIAL, SHADER_TYPE_LIGHT, "LightDiffuse", "LIGHT_DIFFUSE", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_MATERIAL, SHADER_TYPE_LIGHT, "LightSpecular", "LIGHT_SPECULAR", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_MATERIAL, SHADER_TYPE_LIGHT, "EyeVec", "EYE_VEC", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_MATERIAL, SHADER_TYPE_LIGHT, "Diffuse", "DIFFUSE", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_MATERIAL, SHADER_TYPE_LIGHT, "Specular", "SPECULAR", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_MATERIAL, SHADER_TYPE_LIGHT, "SpecExp", "SPECULAR_EXP", "", SLOT_TYPE_SCALAR, SLOT_IN },
	{ MODE_MATERIAL, SHADER_TYPE_LIGHT, "ShadeParam", "SHADE_PARAM", "", SLOT_TYPE_SCALAR, SLOT_IN },
	//light out
	{ MODE_MATERIAL, SHADER_TYPE_LIGHT, "Light", "LIGHT", "", SLOT_TYPE_VEC, SLOT_OUT },
	{ MODE_MATERIAL, SHADER_TYPE_LIGHT, "Shadow", "SHADOW", "", SLOT_TYPE_VEC, SLOT_OUT },
	//canvas item vertex in
	{ MODE_CANVAS_ITEM, SHADER_TYPE_VERTEX, "Vertex", "vec3(SRC_VERTEX,0)", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_VERTEX, "UV", "SRC_UV", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_VERTEX, "Color", "SRC_COLOR.rgb", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_VERTEX, "Alpha", "SRC_COLOR.a", "", SLOT_TYPE_SCALAR, SLOT_IN },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_VERTEX, "WorldMatrix", "WORLD_MATRIX", "", SLOT_TYPE_XFORM, SLOT_IN },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_VERTEX, "ExtraMatrix", "EXTRA_MATRIX", "", SLOT_TYPE_XFORM, SLOT_IN },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_VERTEX, "ProjectionMatrix", "PROJECTION_MATRIX", "", SLOT_TYPE_XFORM, SLOT_IN },
	//canvas item vertex out
	{ MODE_CANVAS_ITEM, SHADER_TYPE_VERTEX, "Vertex", "VERTEX", ".xy", SLOT_TYPE_VEC, SLOT_OUT },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_VERTEX, "UV", "UV", ".xy", SLOT_TYPE_VEC, SLOT_OUT },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_VERTEX, "Color", "COLOR.rgb", "", SLOT_TYPE_VEC, SLOT_OUT },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_VERTEX, "Alpha", "COLOR.a", "", SLOT_TYPE_SCALAR, SLOT_OUT },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_VERTEX, "Var1", "VAR1.rgb", "", SLOT_TYPE_VEC, SLOT_OUT },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_VERTEX, "Var2", "VAR2.rgb", "", SLOT_TYPE_VEC, SLOT_OUT },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_VERTEX, "PointSize", "POINT_SIZE", "", SLOT_TYPE_SCALAR, SLOT_OUT },
	//canvas item fragment in
	{ MODE_CANVAS_ITEM, SHADER_TYPE_FRAGMENT, "Color", "SRC_COLOR.rgb", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_FRAGMENT, "Alpha", "SRC_COLOR.a", "", SLOT_TYPE_SCALAR, SLOT_IN },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_FRAGMENT, "UV", "vec3(UV,0)", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_FRAGMENT, "UVScreen", "vec3(SCREEN_UV,0)", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_FRAGMENT, "TexPixelSize", "vec3(TEXTURE_PIXEL_SIZE,0)", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_FRAGMENT, "Var1", "VAR1.rgb", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_FRAGMENT, "Var2", "VAR2.rgb", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_FRAGMENT, "PointCoord", "POINT_COORD", "", SLOT_TYPE_VEC, SLOT_IN },
	//canvas item fragment out
	{ MODE_CANVAS_ITEM, SHADER_TYPE_FRAGMENT, "Color", "COLOR.rgb", "", SLOT_TYPE_VEC, SLOT_OUT },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_FRAGMENT, "Alpha", "COLOR.a", "", SLOT_TYPE_SCALAR, SLOT_OUT },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_FRAGMENT, "Normal", "NORMAL", "", SLOT_TYPE_VEC, SLOT_OUT },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_FRAGMENT, "NormalMap", "NORMALMAP", "", SLOT_TYPE_VEC, SLOT_OUT },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_FRAGMENT, "NormalMapDepth", "NORMALMAP_DEPTH", "", SLOT_TYPE_SCALAR, SLOT_OUT },
	//canvas item light in
	{ MODE_CANVAS_ITEM, SHADER_TYPE_LIGHT, "Color", "COLOR.rgb", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_LIGHT, "Alpha", "COLOR.a", "", SLOT_TYPE_SCALAR, SLOT_IN },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_LIGHT, "Normal", "NORMAL", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_LIGHT, "UV", "vec3(UV,0)", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_LIGHT, "LightColor", "LIGHT_COLOR.rgb", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_LIGHT, "LightAlpha", "LIGHT_COLOR.a", "", SLOT_TYPE_SCALAR, SLOT_IN },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_LIGHT, "LightHeight", "LIGHT_HEIGHT", "", SLOT_TYPE_SCALAR, SLOT_IN },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_LIGHT, "ShadowColor", "LIGHT_SHADOW.rgb", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_LIGHT, "ShadowAlpha", "LIGHT_SHADOW.a", "", SLOT_TYPE_SCALAR, SLOT_IN },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_LIGHT, "TexPixelSize", "vec3(TEXTURE_PIXEL_SIZE,0)", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_LIGHT, "Var1", "VAR1.rgb", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_LIGHT, "Var2", "VAR2.rgb", "", SLOT_TYPE_VEC, SLOT_IN },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_LIGHT, "PointCoord", "POINT_COORD", "", SLOT_TYPE_VEC, SLOT_IN },
	//canvas item light out
	{ MODE_CANVAS_ITEM, SHADER_TYPE_LIGHT, "LightColor", "LIGHT.rgb", "", SLOT_TYPE_VEC, SLOT_OUT },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_LIGHT, "LightAlpha", "LIGHT.a", "", SLOT_TYPE_SCALAR, SLOT_OUT },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_LIGHT, "ShadowColor", "SHADOW.rgb", "", SLOT_TYPE_VEC, SLOT_OUT },
	{ MODE_CANVAS_ITEM, SHADER_TYPE_LIGHT, "ShadowAlpha", "SHADOW.a", "", SLOT_TYPE_SCALAR, SLOT_OUT },
	//end
	{ MODE_MATERIAL, SHADER_TYPE_FRAGMENT, NULL, NULL, NULL, SLOT_TYPE_SCALAR, SLOT_OUT },

};

void ShaderGraph::get_input_output_node_slot_info(Mode p_mode, ShaderType p_type, List<SlotInfo> *r_slots) {

	const InOutParamInfo *iop = &inout_param_info[0];
	while (iop->name) {
		if (p_mode == iop->shader_mode && p_type == iop->shader_type) {

			SlotInfo si;
			si.dir = iop->dir;
			si.name = iop->name;
			si.type = iop->slot_type;
			r_slots->push_back(si);
		}
		iop++;
	}
}

const ShaderGraph::NodeSlotInfo ShaderGraph::node_slot_info[] = {

	{ NODE_SCALAR_CONST, { SLOT_MAX }, { SLOT_TYPE_SCALAR, SLOT_MAX } }, //scalar constant
	{ NODE_VEC_CONST, { SLOT_MAX }, { SLOT_TYPE_VEC, SLOT_MAX } }, //vec3 constant
	{ NODE_RGB_CONST, { SLOT_MAX }, { SLOT_TYPE_VEC, SLOT_TYPE_SCALAR, SLOT_MAX } }, //rgb constant (shows a color picker instead)
	{ NODE_XFORM_CONST, { SLOT_MAX }, { SLOT_TYPE_XFORM, SLOT_MAX } }, // 4x4 matrix constant
	{ NODE_TIME, { SLOT_MAX }, { SLOT_TYPE_SCALAR, SLOT_MAX } }, // time in seconds
	{ NODE_SCREEN_TEX, { SLOT_TYPE_VEC, SLOT_MAX }, { SLOT_TYPE_VEC, SLOT_MAX } }, // screen texture sampler (takes UV) (only usable in fragment shader)
	{ NODE_SCALAR_OP, { SLOT_TYPE_SCALAR, SLOT_TYPE_SCALAR, SLOT_MAX }, { SLOT_TYPE_SCALAR, SLOT_MAX } }, // scalar vs scalar op (mul,{SLOT_MAX},{SLOT_MAX}}, add,{SLOT_MAX},{SLOT_MAX}}, div,{SLOT_MAX},{SLOT_MAX}}, etc)
	{ NODE_VEC_OP, { SLOT_TYPE_VEC, SLOT_TYPE_VEC, SLOT_MAX }, { SLOT_TYPE_VEC, SLOT_MAX } }, // scalar vs scalar op (mul,{SLOT_MAX},{SLOT_MAX}}, add,{SLOT_MAX},{SLOT_MAX}}, div,{SLOT_MAX},{SLOT_MAX}}, etc)
	{ NODE_VEC_SCALAR_OP, { SLOT_TYPE_VEC, SLOT_TYPE_SCALAR, SLOT_MAX }, { SLOT_TYPE_VEC, SLOT_MAX } }, // vec3 vs scalar op (mul,{SLOT_MAX},{SLOT_MAX}}, add,{SLOT_MAX},{SLOT_MAX}}, div,{SLOT_MAX},{SLOT_MAX}}, etc)
	{ NODE_RGB_OP, { SLOT_TYPE_VEC, SLOT_TYPE_VEC, SLOT_MAX }, { SLOT_TYPE_VEC, SLOT_MAX } }, // vec3 vs scalar op (mul,{SLOT_MAX},{SLOT_MAX}}, add,{SLOT_MAX},{SLOT_MAX}}, div,{SLOT_MAX},{SLOT_MAX}}, etc)
	{ NODE_XFORM_MULT, { SLOT_TYPE_XFORM, SLOT_TYPE_XFORM, SLOT_MAX }, { SLOT_TYPE_XFORM, SLOT_MAX } }, // mat4 x mat4
	{ NODE_XFORM_VEC_MULT, { SLOT_TYPE_XFORM, SLOT_TYPE_VEC, SLOT_MAX }, { SLOT_TYPE_VEC, SLOT_MAX } }, // mat4 x vec3 mult (with no-translation option)
	{ NODE_XFORM_VEC_INV_MULT, { SLOT_TYPE_VEC, SLOT_TYPE_XFORM, SLOT_MAX }, { SLOT_TYPE_VEC, SLOT_MAX } }, // mat4 x vec3 inverse mult (with no-translation option)
	{ NODE_SCALAR_FUNC, { SLOT_TYPE_SCALAR, SLOT_MAX }, { SLOT_TYPE_SCALAR, SLOT_MAX } }, // scalar function (sin,{SLOT_MAX},{SLOT_MAX}}, cos,{SLOT_MAX},{SLOT_MAX}}, etc)
	{ NODE_VEC_FUNC, { SLOT_TYPE_VEC, SLOT_MAX }, { SLOT_TYPE_VEC, SLOT_MAX } }, // vector function (normalize,{SLOT_MAX},{SLOT_MAX}}, negate,{SLOT_MAX},{SLOT_MAX}}, reciprocal,{SLOT_MAX},{SLOT_MAX}}, rgb2hsv,{SLOT_MAX},{SLOT_MAX}}, hsv2rgb,{SLOT_MAX},{SLOT_MAX}}, etc,{SLOT_MAX},{SLOT_MAX}}, etc)
	{ NODE_VEC_LEN, { SLOT_TYPE_VEC, SLOT_MAX }, { SLOT_TYPE_SCALAR, SLOT_MAX } }, // vec3 length
	{ NODE_DOT_PROD, { SLOT_TYPE_VEC, SLOT_TYPE_VEC, SLOT_MAX }, { SLOT_TYPE_SCALAR, SLOT_MAX } }, // vec3 . vec3 (dot product -> scalar output)
	{ NODE_VEC_TO_SCALAR, { SLOT_TYPE_VEC, SLOT_MAX }, { SLOT_TYPE_SCALAR, SLOT_TYPE_SCALAR, SLOT_TYPE_SCALAR } }, // 1 vec3 input,{SLOT_MAX},{SLOT_MAX}}, 3 scalar outputs
	{ NODE_SCALAR_TO_VEC, { SLOT_TYPE_SCALAR, SLOT_TYPE_SCALAR, SLOT_TYPE_SCALAR }, { SLOT_TYPE_VEC, SLOT_MAX } }, // 3 scalar input,{SLOT_MAX},{SLOT_MAX}}, 1 vec3 output
	{ NODE_SCALAR_INTERP, { SLOT_TYPE_SCALAR, SLOT_TYPE_SCALAR, SLOT_TYPE_SCALAR }, { SLOT_TYPE_SCALAR, SLOT_MAX } }, // scalar interpolation (with optional curve)
	{ NODE_VEC_INTERP, { SLOT_TYPE_VEC, SLOT_TYPE_VEC, SLOT_TYPE_SCALAR }, { SLOT_TYPE_VEC, SLOT_MAX } }, // vec3 interpolation  (with optional curve)
	{ NODE_COLOR_RAMP, { SLOT_TYPE_SCALAR, SLOT_MAX }, { SLOT_TYPE_VEC, SLOT_TYPE_SCALAR, SLOT_MAX } }, // vec3 interpolation  (with optional curve)
	{ NODE_CURVE_MAP, { SLOT_TYPE_SCALAR, SLOT_MAX }, { SLOT_TYPE_SCALAR, SLOT_MAX } }, // vec3 interpolation  (with optional curve)
	{ NODE_SCALAR_INPUT, { SLOT_MAX }, { SLOT_TYPE_SCALAR, SLOT_MAX } }, // scalar uniform (assignable in material)
	{ NODE_VEC_INPUT, { SLOT_MAX }, { SLOT_TYPE_VEC, SLOT_MAX } }, // vec3 uniform (assignable in material)
	{ NODE_RGB_INPUT, { SLOT_MAX }, { SLOT_TYPE_VEC, SLOT_TYPE_SCALAR, SLOT_MAX } }, // color uniform (assignable in material)
	{ NODE_XFORM_INPUT, { SLOT_MAX }, { SLOT_TYPE_XFORM, SLOT_MAX } }, // mat4 uniform (assignable in material)
	{ NODE_TEXTURE_INPUT, { SLOT_TYPE_VEC, SLOT_MAX }, { SLOT_TYPE_VEC, SLOT_TYPE_SCALAR, SLOT_MAX } }, // texture input (assignable in material)
	{ NODE_CUBEMAP_INPUT, { SLOT_TYPE_VEC, SLOT_MAX }, { SLOT_TYPE_VEC, SLOT_TYPE_SCALAR, SLOT_MAX } }, // cubemap input (assignable in material)
	{ NODE_DEFAULT_TEXTURE, { SLOT_TYPE_VEC, SLOT_MAX }, { SLOT_TYPE_VEC, SLOT_TYPE_SCALAR, SLOT_MAX } }, // cubemap input (assignable in material)
	{ NODE_COMMENT, { SLOT_MAX }, { SLOT_MAX } }, // comment
	{ NODE_TYPE_MAX, { SLOT_MAX }, { SLOT_MAX } }
};

int ShaderGraph::get_node_input_slot_count(Mode p_mode, ShaderType p_shader_type, NodeType p_type) {

	if (p_type == NODE_INPUT || p_type == NODE_OUTPUT) {

		const InOutParamInfo *iop = &inout_param_info[0];
		int pc = 0;
		while (iop->name) {
			if (p_mode == iop->shader_mode && p_shader_type == iop->shader_type) {

				if (iop->dir == SLOT_OUT)
					pc++;
			}
			iop++;
		}
		return pc;
	} else if (p_type == NODE_VEC_TO_XFORM) {
		return 4;
	} else if (p_type == NODE_XFORM_TO_VEC) {
		return 1;
	} else {

		const NodeSlotInfo *nsi = &node_slot_info[0];
		while (nsi->type != NODE_TYPE_MAX) {

			if (nsi->type == p_type) {
				int pc = 0;
				for (int i = 0; i < NodeSlotInfo::MAX_INS; i++) {
					if (nsi->ins[i] == SLOT_MAX)
						break;
					pc++;
				}
				return pc;
			}

			nsi++;
		}

		return 0;
	}
}

int ShaderGraph::get_node_output_slot_count(Mode p_mode, ShaderType p_shader_type, NodeType p_type) {

	if (p_type == NODE_INPUT || p_type == NODE_OUTPUT) {

		const InOutParamInfo *iop = &inout_param_info[0];
		int pc = 0;
		while (iop->name) {
			if (p_mode == iop->shader_mode && p_shader_type == iop->shader_type) {

				if (iop->dir == SLOT_IN)
					pc++;
			}
			iop++;
		}
		return pc;
	} else if (p_type == NODE_VEC_TO_XFORM) {
		return 1;
	} else if (p_type == NODE_XFORM_TO_VEC) {
		return 4;
	} else {

		const NodeSlotInfo *nsi = &node_slot_info[0];
		while (nsi->type != NODE_TYPE_MAX) {

			if (nsi->type == p_type) {
				int pc = 0;
				for (int i = 0; i < NodeSlotInfo::MAX_OUTS; i++) {
					if (nsi->outs[i] == SLOT_MAX)
						break;
					pc++;
				}
				return pc;
			}

			nsi++;
		}

		return 0;
	}
}
ShaderGraph::SlotType ShaderGraph::get_node_input_slot_type(Mode p_mode, ShaderType p_shader_type, NodeType p_type, int p_idx) {

	if (p_type == NODE_INPUT || p_type == NODE_OUTPUT) {

		const InOutParamInfo *iop = &inout_param_info[0];
		int pc = 0;
		while (iop->name) {
			if (p_mode == iop->shader_mode && p_shader_type == iop->shader_type) {

				if (iop->dir == SLOT_OUT) {
					if (pc == p_idx)
						return iop->slot_type;
					pc++;
				}
			}
			iop++;
		}
		ERR_FAIL_V(SLOT_MAX);
	} else if (p_type == NODE_VEC_TO_XFORM) {
		return SLOT_TYPE_VEC;
	} else if (p_type == NODE_XFORM_TO_VEC) {
		return SLOT_TYPE_XFORM;
	} else {

		const NodeSlotInfo *nsi = &node_slot_info[0];
		while (nsi->type != NODE_TYPE_MAX) {

			if (nsi->type == p_type) {
				for (int i = 0; i < NodeSlotInfo::MAX_INS; i++) {

					if (nsi->ins[i] == SLOT_MAX)
						break;
					if (i == p_idx)
						return nsi->ins[i];
				}
			}

			nsi++;
		}

		ERR_FAIL_V(SLOT_MAX);
	}
}
ShaderGraph::SlotType ShaderGraph::get_node_output_slot_type(Mode p_mode, ShaderType p_shader_type, NodeType p_type, int p_idx) {

	if (p_type == NODE_INPUT || p_type == NODE_OUTPUT) {

		const InOutParamInfo *iop = &inout_param_info[0];
		int pc = 0;
		while (iop->name) {
			if (p_mode == iop->shader_mode && p_shader_type == iop->shader_type) {

				if (iop->dir == SLOT_IN) {
					if (pc == p_idx)
						return iop->slot_type;
					pc++;
				}
			}
			iop++;
		}
		ERR_FAIL_V(SLOT_MAX);
	} else if (p_type == NODE_VEC_TO_XFORM) {
		return SLOT_TYPE_XFORM;
	} else if (p_type == NODE_XFORM_TO_VEC) {
		return SLOT_TYPE_VEC;
	} else {

		const NodeSlotInfo *nsi = &node_slot_info[0];
		while (nsi->type != NODE_TYPE_MAX) {

			if (nsi->type == p_type) {
				for (int i = 0; i < NodeSlotInfo::MAX_OUTS; i++) {
					if (nsi->outs[i] == SLOT_MAX)
						break;
					if (i == p_idx)
						return nsi->outs[i];
				}
			}

			nsi++;
		}

		ERR_FAIL_V(SLOT_MAX);
	}
}

void ShaderGraph::_update_shader() {

	String code[3];

	List<StringName> names;
	get_default_texture_param_list(&names);

	for (List<StringName>::Element *E = names.front(); E; E = E->next()) {

		set_default_texture_param(E->get(), Ref<Texture>());
	}

	for (int i = 0; i < 3; i++) {

		int idx = 0;
		for (Map<int, Node>::Element *E = shader[i].node_map.front(); E; E = E->next()) {

			E->get().sort_order = idx++;
		}
		//simple method for graph solving using bubblesort derived algorithm
		int iters = 0;
		int iter_max = shader[i].node_map.size() * shader[i].node_map.size();

		while (true) {
			if (iters > iter_max)
				break;

			int swaps = 0;
			for (Map<int, Node>::Element *E = shader[i].node_map.front(); E; E = E->next()) {

				for (Map<int, SourceSlot>::Element *F = E->get().connections.front(); F; F = F->next()) {

					//this is kinda slow, could be sped up
					Map<int, Node>::Element *G = shader[i].node_map.find(F->get().id);
					ERR_FAIL_COND(!G);
					if (G->get().sort_order > E->get().sort_order) {

						SWAP(G->get().sort_order, E->get().sort_order);
						swaps++;
					}
				}
			}

			iters++;
			if (swaps == 0) {
				iters = 0;
				break;
			}
		}

		if (iters > 0) {

			shader[i].error = GRAPH_ERROR_CYCLIC;
			continue;
		}

		Vector<Node *> order;
		order.resize(shader[i].node_map.size());

		for (Map<int, Node>::Element *E = shader[i].node_map.front(); E; E = E->next()) {

			order[E->get().sort_order] = &E->get();
		}

		//generate code for the ordered graph
		bool failed = false;

		if (i == SHADER_TYPE_FRAGMENT && get_mode() == MODE_MATERIAL) {
			code[i] += "vec3 DIFFUSE_OUT=vec3(0,0,0);\n";
			code[i] += "float ALPHA_OUT=0;\n";
		}

		Map<String, String> inputs_xlate;
		Map<String, String> input_names_xlate;
		Set<String> inputs_used;

		for (int j = 0; j < order.size(); j++) {

			Node *n = order[j];
			if (n->type == NODE_INPUT) {

				const InOutParamInfo *iop = &inout_param_info[0];
				int idx = 0;
				while (iop->name) {
					if (get_mode() == iop->shader_mode && i == iop->shader_type && SLOT_IN == iop->dir) {

						const char *typestr[4] = { "float", "vec3", "mat4", "texture" };

						String vname = ("nd" + itos(n->id) + "sl" + itos(idx));
						inputs_xlate[vname] = String(typestr[iop->slot_type]) + " " + vname + "=" + iop->variable + ";\n";
						input_names_xlate[vname] = iop->variable;
						idx++;
					}
					iop++;
				}

			} else if (n->type == NODE_OUTPUT) {

				bool use_alpha = false;
				const InOutParamInfo *iop = &inout_param_info[0];
				int idx = 0;
				while (iop->name) {
					if (get_mode() == iop->shader_mode && i == iop->shader_type && SLOT_OUT == iop->dir) {

						if (n->connections.has(idx)) {
							String iname = ("nd" + itos(n->connections[idx].id) + "sl" + itos(n->connections[idx].slot));
							if (node_get_type(ShaderType(i), n->connections[idx].id) == NODE_INPUT)
								inputs_used.insert(iname);
							code[i] += String(iop->variable) + "=" + iname + String(iop->postfix) + ";\n";
							if (i == SHADER_TYPE_FRAGMENT && get_mode() == MODE_MATERIAL && String(iop->name) == "DiffuseAlpha")
								use_alpha = true;
						}
						idx++;
					}
					iop++;
				}

				if (i == SHADER_TYPE_FRAGMENT && get_mode() == MODE_MATERIAL) {

					if (use_alpha) {
						code[i] += "DIFFUSE_ALPHA=vec4(DIFFUSE_OUT,ALPHA_OUT);\n";
					} else {
						code[i] += "DIFFUSE=DIFFUSE_OUT;\n";
					}
				}

			} else {
				Vector<String> inputs;
				int max = get_node_input_slot_count(get_mode(), ShaderType(i), n->type);
				for (int k = 0; k < max; k++) {
					String iname;
					if (!n->connections.has(k)) {
						iname = "nd" + itos(n->id) + "sl" + itos(k) + "def";
					} else {
						iname = "nd" + itos(n->connections[k].id) + "sl" + itos(n->connections[k].slot);
						if (node_get_type(ShaderType(i), n->connections[k].id) == NODE_INPUT) {
							inputs_used.insert(iname);
						}
					}
					inputs.push_back(iname);
				}

				if (failed)
					break;

				if (n->type == NODE_TEXTURE_INPUT || n->type == NODE_CUBEMAP_INPUT) {

					set_default_texture_param(n->param1, n->param2);
				}
				_add_node_code(ShaderType(i), n, inputs, code[i]);
			}
		}

		if (failed)
			continue;

		for (Set<String>::Element *E = inputs_used.front(); E; E = E->next()) {

			ERR_CONTINUE(!inputs_xlate.has(E->get()));
			code[i] = inputs_xlate[E->get()] + code[i];
			String name = input_names_xlate[E->get()];

			if (i == SHADER_TYPE_VERTEX && get_mode() == MODE_MATERIAL) {
				if (name == ("SRC_COLOR"))
					code[i] = "vec3 SRC_COLOR=COLOR.rgb;\n" + code[i];
				if (name == ("SRC_ALPHA"))
					code[i] = "float SRC_ALPHA=COLOR.a;\n" + code[i];
				if (name == ("SRC_UV"))
					code[i] = "vec3 SRC_UV=vec3(UV,0);\n" + code[i];
				if (name == ("SRC_UV2"))
					code[i] = "float SRC_UV2=vec3(UV2,0);\n" + code[i];
			} else if (i == SHADER_TYPE_FRAGMENT && get_mode() == MODE_MATERIAL) {
				if (name == ("IN_NORMAL"))
					code[i] = "vec3 IN_NORMAL=NORMAL;\n" + code[i];
			} else if (i == SHADER_TYPE_VERTEX && get_mode() == MODE_CANVAS_ITEM) {
				if (name == ("SRC_COLOR"))
					code[i] = "vec3 SRC_COLOR=COLOR.rgb;\n" + code[i];
				if (name == ("SRC_UV"))
					code[i] = "vec3 SRC_UV=vec3(UV,0);\n" + code[i];
			}
		}

		shader[i].error = GRAPH_OK;
	}

	bool all_ok = true;
	for (int i = 0; i < 3; i++) {
		if (shader[i].error != GRAPH_OK)
			all_ok = false;
	}

	/*print_line("VERTEX: \n"+code[0]);
	print_line("FRAGMENT: \n"+code[1]);
	print_line("LIGHT: \n"+code[2]);*/

	if (all_ok) {
		set_code(code[0], code[1], code[2]);
	}
	//do shader here

	_pending_update_shader = false;
	emit_signal(SceneStringNames::get_singleton()->updated);
}

void ShaderGraph::_plot_curve(const Vector2 &p_a, const Vector2 &p_b, const Vector2 &p_c, const Vector2 &p_d, uint8_t *p_heights, bool *p_useds) {

	float geometry[4][4];
	float tmp1[4][4];
	float tmp2[4][4];
	float deltas[4][4];
	double x, dx, dx2, dx3;
	double y, dy, dy2, dy3;
	double d, d2, d3;
	int lastx, lasty;
	int newx, newy;
	int ntimes;
	int i, j;

	int xmax = 255;
	int ymax = 255;

	/* construct the geometry matrix from the segment */
	for (i = 0; i < 4; i++) {
		geometry[i][2] = 0;
		geometry[i][3] = 0;
	}

	geometry[0][0] = (p_a[0] * xmax);
	geometry[1][0] = (p_b[0] * xmax);
	geometry[2][0] = (p_c[0] * xmax);
	geometry[3][0] = (p_d[0] * xmax);

	geometry[0][1] = (p_a[1] * ymax);
	geometry[1][1] = (p_b[1] * ymax);
	geometry[2][1] = (p_c[1] * ymax);
	geometry[3][1] = (p_d[1] * ymax);

	/* subdivide the curve ntimes (1000) times */
	ntimes = 4 * xmax;
	/* ntimes can be adjusted to give a finer or coarser curve */
	d = 1.0 / ntimes;
	d2 = d * d;
	d3 = d * d * d;

	/* construct a temporary matrix for determining the forward differencing deltas */
	tmp2[0][0] = 0;
	tmp2[0][1] = 0;
	tmp2[0][2] = 0;
	tmp2[0][3] = 1;
	tmp2[1][0] = d3;
	tmp2[1][1] = d2;
	tmp2[1][2] = d;
	tmp2[1][3] = 0;
	tmp2[2][0] = 6 * d3;
	tmp2[2][1] = 2 * d2;
	tmp2[2][2] = 0;
	tmp2[2][3] = 0;
	tmp2[3][0] = 6 * d3;
	tmp2[3][1] = 0;
	tmp2[3][2] = 0;
	tmp2[3][3] = 0;

	/* compose the basis and geometry matrices */

	static const float CR_basis[4][4] = {
		{ -0.5, 1.5, -1.5, 0.5 },
		{ 1.0, -2.5, 2.0, -0.5 },
		{ -0.5, 0.0, 0.5, 0.0 },
		{ 0.0, 1.0, 0.0, 0.0 },
	};

	for (i = 0; i < 4; i++) {
		for (j = 0; j < 4; j++) {
			tmp1[i][j] = (CR_basis[i][0] * geometry[0][j] +
						  CR_basis[i][1] * geometry[1][j] +
						  CR_basis[i][2] * geometry[2][j] +
						  CR_basis[i][3] * geometry[3][j]);
		}
	}
	/* compose the above results to get the deltas matrix */

	for (i = 0; i < 4; i++) {
		for (j = 0; j < 4; j++) {
			deltas[i][j] = (tmp2[i][0] * tmp1[0][j] +
							tmp2[i][1] * tmp1[1][j] +
							tmp2[i][2] * tmp1[2][j] +
							tmp2[i][3] * tmp1[3][j]);
		}
	}

	/* extract the x deltas */
	x = deltas[0][0];
	dx = deltas[1][0];
	dx2 = deltas[2][0];
	dx3 = deltas[3][0];

	/* extract the y deltas */
	y = deltas[0][1];
	dy = deltas[1][1];
	dy2 = deltas[2][1];
	dy3 = deltas[3][1];

	lastx = CLAMP(x, 0, xmax);
	lasty = CLAMP(y, 0, ymax);

	p_heights[lastx] = lasty;
	p_useds[lastx] = true;

	/* loop over the curve */
	for (i = 0; i < ntimes; i++) {
		/* increment the x values */
		x += dx;
		dx += dx2;
		dx2 += dx3;

		/* increment the y values */
		y += dy;
		dy += dy2;
		dy2 += dy3;

		newx = CLAMP((Math::round(x)), 0, xmax);
		newy = CLAMP((Math::round(y)), 0, ymax);

		/* if this point is different than the last one...then draw it */
		if ((lastx != newx) || (lasty != newy)) {
			p_useds[newx] = true;
			p_heights[newx] = newy;
		}

		lastx = newx;
		lasty = newy;
	}
}

void ShaderGraph::_add_node_code(ShaderType p_type, Node *p_node, const Vector<String> &p_inputs, String &code) {

	const char *typestr[4] = { "float", "vec3", "mat4", "texture" };
#define OUTNAME(id, slot) (String(typestr[get_node_output_slot_type(get_mode(), p_type, p_node->type, slot)]) + " " + ("nd" + itos(id) + "sl" + itos(slot)))
#define OUTVAR(id, slot) ("nd" + itos(id) + "sl" + itos(slot))
#define DEF_VEC(slot)                                                              \
	if (p_inputs[slot].ends_with("def")) {                                         \
		Vector3 v = p_node->defaults[slot];                                        \
		code += String(typestr[1]) + " " + p_inputs[slot] + "=vec3(" + v + ");\n"; \
	}
#define DEF_SCALAR(slot)                                                           \
	if (p_inputs[slot].ends_with("def")) {                                         \
		double v = p_node->defaults[slot];                                         \
		code += String(typestr[0]) + " " + p_inputs[slot] + "=" + rtos(v) + ";\n"; \
	}
#define DEF_COLOR(slot)                                                                                                              \
	if (p_inputs[slot].ends_with("def")) {                                                                                           \
		Color col = p_node->defaults[slot];                                                                                          \
		code += String(typestr[1]) + " " + p_inputs[slot] + "=vec3(" + rtos(col.r) + "," + rtos(col.g) + "," + rtos(col.b) + ");\n"; \
	}
#define DEF_MATRIX(slot)                                                                                                                             \
	if (p_inputs[slot].ends_with("def")) {                                                                                                           \
		Transform xf = p_node->defaults[slot];                                                                                                       \
		code += String(typestr[2]) + " " + p_inputs[slot] + "=mat4(\n";                                                                              \
		code += "\tvec4(vec3(" + rtos(xf.basis.get_axis(0).x) + "," + rtos(xf.basis.get_axis(0).y) + "," + rtos(xf.basis.get_axis(0).z) + "),0),\n"; \
		code += "\tvec4(vec3(" + rtos(xf.basis.get_axis(1).x) + "," + rtos(xf.basis.get_axis(1).y) + "," + rtos(xf.basis.get_axis(1).z) + "),0),\n"; \
		code += "\tvec4(vec3(" + rtos(xf.basis.get_axis(2).x) + "," + rtos(xf.basis.get_axis(2).y) + "," + rtos(xf.basis.get_axis(2).z) + "),0),\n"; \
		code += "\tvec4(vec3(" + rtos(xf.origin.x) + "," + rtos(xf.origin.y) + "," + rtos(xf.origin.z) + "),1)\n";                                   \
		code += ");\n";                                                                                                                              \
	}

	switch (p_node->type) {

		case NODE_INPUT: {

		} break;
		case NODE_SCALAR_CONST: {

			double scalar = p_node->param1;
			code += OUTNAME(p_node->id, 0) + "=" + rtos(scalar) + ";\n";
		} break;
		case NODE_VEC_CONST: {
			Vector3 vec = p_node->param1;
			code += OUTNAME(p_node->id, 0) + "=vec3(" + rtos(vec.x) + "," + rtos(vec.y) + "," + rtos(vec.z) + ");\n";
		} break;
		case NODE_RGB_CONST: {
			Color col = p_node->param1;
			code += OUTNAME(p_node->id, 0) + "=vec3(" + rtos(col.r) + "," + rtos(col.g) + "," + rtos(col.b) + ");\n";
			code += OUTNAME(p_node->id, 1) + "=" + rtos(col.a) + ";\n";
		} break;
		case NODE_XFORM_CONST: {

			Transform xf = p_node->param1;
			code += OUTNAME(p_node->id, 0) + "=mat4(\n";
			code += "\tvec4(vec3(" + rtos(xf.basis.get_axis(0).x) + "," + rtos(xf.basis.get_axis(0).y) + "," + rtos(xf.basis.get_axis(0).z) + "),0),\n";
			code += "\tvec4(vec3(" + rtos(xf.basis.get_axis(1).x) + "," + rtos(xf.basis.get_axis(1).y) + "," + rtos(xf.basis.get_axis(1).z) + "),0),\n";
			code += "\tvec4(vec3(" + rtos(xf.basis.get_axis(2).x) + "," + rtos(xf.basis.get_axis(2).y) + "," + rtos(xf.basis.get_axis(2).z) + "),0),\n";
			code += "\tvec4(vec3(" + rtos(xf.origin.x) + "," + rtos(xf.origin.y) + "," + rtos(xf.origin.z) + "),1)\n";
			code += ");";

		} break;
		case NODE_TIME: {
			code += OUTNAME(p_node->id, 0) + "=TIME;\n";
		} break;
		case NODE_SCREEN_TEX: {
			DEF_VEC(0);
			code += OUTNAME(p_node->id, 0) + "=texscreen(" + p_inputs[0] + ".xy);\n";
		} break;
		case NODE_SCALAR_OP: {
			DEF_SCALAR(0);
			DEF_SCALAR(1);
			int op = p_node->param1;
			String optxt;
			switch (op) {

				case SCALAR_OP_ADD: optxt = p_inputs[0] + "+" + p_inputs[1] + ";"; break;
				case SCALAR_OP_SUB: optxt = p_inputs[0] + "-" + p_inputs[1] + ";"; break;
				case SCALAR_OP_MUL: optxt = p_inputs[0] + "*" + p_inputs[1] + ";"; break;
				case SCALAR_OP_DIV: optxt = p_inputs[0] + "/" + p_inputs[1] + ";"; break;
				case SCALAR_OP_MOD: optxt = "mod(" + p_inputs[0] + "," + p_inputs[1] + ");"; break;
				case SCALAR_OP_POW: optxt = "pow(" + p_inputs[0] + "," + p_inputs[1] + ");"; break;
				case SCALAR_OP_MAX: optxt = "max(" + p_inputs[0] + "," + p_inputs[1] + ");"; break;
				case SCALAR_OP_MIN: optxt = "min(" + p_inputs[0] + "," + p_inputs[1] + ");"; break;
				case SCALAR_OP_ATAN2: optxt = "atan2(" + p_inputs[0] + "," + p_inputs[1] + ");"; break;
			}
			code += OUTNAME(p_node->id, 0) + "=" + optxt + "\n";

		} break;
		case NODE_VEC_OP: {
			DEF_VEC(0);
			DEF_VEC(1);
			int op = p_node->param1;
			String optxt;
			switch (op) {
				case VEC_OP_ADD: optxt = p_inputs[0] + "+" + p_inputs[1] + ";"; break;
				case VEC_OP_SUB: optxt = p_inputs[0] + "-" + p_inputs[1] + ";"; break;
				case VEC_OP_MUL: optxt = p_inputs[0] + "*" + p_inputs[1] + ";"; break;
				case VEC_OP_DIV: optxt = p_inputs[0] + "/" + p_inputs[1] + ";"; break;
				case VEC_OP_MOD: optxt = "mod(" + p_inputs[0] + "," + p_inputs[1] + ");"; break;
				case VEC_OP_POW: optxt = "pow(" + p_inputs[0] + "," + p_inputs[1] + ");"; break;
				case VEC_OP_MAX: optxt = "max(" + p_inputs[0] + "," + p_inputs[1] + ");"; break;
				case VEC_OP_MIN: optxt = "min(" + p_inputs[0] + "," + p_inputs[1] + ");"; break;
				case VEC_OP_CROSS: optxt = "cross(" + p_inputs[0] + "," + p_inputs[1] + ");"; break;
			}
			code += OUTNAME(p_node->id, 0) + "=" + optxt + "\n";

		} break;
		case NODE_VEC_SCALAR_OP: {
			DEF_VEC(0);
			DEF_SCALAR(1);
			int op = p_node->param1;
			String optxt;
			switch (op) {
				case VEC_SCALAR_OP_MUL: optxt = p_inputs[0] + "*" + p_inputs[1] + ";"; break;
				case VEC_SCALAR_OP_DIV: optxt = p_inputs[0] + "/" + p_inputs[1] + ";"; break;
				case VEC_SCALAR_OP_POW: optxt = "pow(" + p_inputs[0] + "," + p_inputs[1] + ");"; break;
			}
			code += OUTNAME(p_node->id, 0) + "=" + optxt + "\n";

		} break;
		case NODE_RGB_OP: {
			DEF_COLOR(0);
			DEF_COLOR(1);

			int op = p_node->param1;
			static const char *axisn[3] = { "x", "y", "z" };
			switch (op) {
				case RGB_OP_SCREEN: {

					code += OUTNAME(p_node->id, 0) + "=vec3(1.0)-(vec3(1.0)-" + p_inputs[0] + ")*(vec3(1.0)-" + p_inputs[1] + ");\n";
				} break;
				case RGB_OP_DIFFERENCE: {

					code += OUTNAME(p_node->id, 0) + "=abs(" + p_inputs[0] + "-" + p_inputs[1] + ");\n";
				} break;
				case RGB_OP_DARKEN: {

					code += OUTNAME(p_node->id, 0) + "=min(" + p_inputs[0] + "," + p_inputs[1] + ");\n";
				} break;
				case RGB_OP_LIGHTEN: {

					code += OUTNAME(p_node->id, 0) + "=max(" + p_inputs[0] + "," + p_inputs[1] + ");\n";

				} break;
				case RGB_OP_OVERLAY: {

					code += OUTNAME(p_node->id, 0) + ";\n";
					for (int i = 0; i < 3; i++) {
						code += "{\n";
						code += "\tfloat base=" + p_inputs[0] + "." + axisn[i] + ";\n";
						code += "\tfloat blend=" + p_inputs[1] + "." + axisn[i] + ";\n";
						code += "\tif (base < 0.5) {\n";
						code += "\t\t" + OUTVAR(p_node->id, 0) + "." + axisn[i] + " = 2.0 * base * blend;\n";
						code += "\t} else {\n";
						code += "\t\t" + OUTVAR(p_node->id, 0) + "." + axisn[i] + " = 1.0 - 2.0 * (1.0 - blend) * (1.0 - base);\n";
						code += "\t}\n";
						code += "}\n";
					}

				} break;
				case RGB_OP_DODGE: {

					code += OUTNAME(p_node->id, 0) + "=(" + p_inputs[0] + ")/(vec3(1.0)-" + p_inputs[1] + ");\n";

				} break;
				case RGB_OP_BURN: {

					code += OUTNAME(p_node->id, 0) + "=vec3(1.0)-(vec3(1.0)-" + p_inputs[0] + ")/(" + p_inputs[1] + ");\n";
				} break;
				case RGB_OP_SOFT_LIGHT: {

					code += OUTNAME(p_node->id, 0) + ";\n";
					for (int i = 0; i < 3; i++) {
						code += "{\n";
						code += "\tfloat base=" + p_inputs[0] + "." + axisn[i] + ";\n";
						code += "\tfloat blend=" + p_inputs[1] + "." + axisn[i] + ";\n";
						code += "\tif (base < 0.5) {\n";
						code += "\t\t" + OUTVAR(p_node->id, 0) + "." + axisn[i] + " = (base * (blend+0.5));\n";
						code += "\t} else {\n";
						code += "\t\t" + OUTVAR(p_node->id, 0) + "." + axisn[i] + " = (1 - (1-base) * (1-(blend-0.5)));\n";
						code += "\t}\n";
						code += "}\n";
					}

				} break;
				case RGB_OP_HARD_LIGHT: {

					code += OUTNAME(p_node->id, 0) + ";\n";
					for (int i = 0; i < 3; i++) {
						code += "{\n";
						code += "\tfloat base=" + p_inputs[0] + "." + axisn[i] + ";\n";
						code += "\tfloat blend=" + p_inputs[1] + "." + axisn[i] + ";\n";
						code += "\tif (base < 0.5) {\n";
						code += "\t\t" + OUTVAR(p_node->id, 0) + "." + axisn[i] + " = (base * (2*blend));\n";
						code += "\t} else {\n";
						code += "\t\t" + OUTVAR(p_node->id, 0) + "." + axisn[i] + " = (1 - (1-base) * (1-2*(blend-0.5)));\n";
						code += "\t}\n";
						code += "}\n";
					}

				} break;
			}
		} break;
		case NODE_XFORM_MULT: {
			DEF_MATRIX(0);
			DEF_MATRIX(1);

			code += OUTNAME(p_node->id, 0) + "=" + p_inputs[0] + "*" + p_inputs[1] + ";\n";

		} break;
		case NODE_XFORM_VEC_MULT: {
			DEF_MATRIX(0);
			DEF_VEC(1);

			bool no_translation = p_node->param1;
			if (no_translation) {
				code += OUTNAME(p_node->id, 0) + "=(" + p_inputs[0] + "*vec4(" + p_inputs[1] + ",0)).xyz;\n";
			} else {
				code += OUTNAME(p_node->id, 0) + "=(" + p_inputs[0] + "*vec4(" + p_inputs[1] + ",1)).xyz;\n";
			}

		} break;
		case NODE_XFORM_VEC_INV_MULT: {
			DEF_VEC(0);
			DEF_MATRIX(1);
			bool no_translation = p_node->param1;
			if (no_translation) {
				code += OUTNAME(p_node->id, 0) + "=(" + p_inputs[1] + "*vec4(" + p_inputs[0] + ",0)).xyz;\n";
			} else {
				code += OUTNAME(p_node->id, 0) + "=(" + p_inputs[1] + "*vec4(" + p_inputs[0] + ",1)).xyz;\n";
			}
		} break;
		case NODE_SCALAR_FUNC: {
			DEF_SCALAR(0);
			static const char *scalar_func_id[SCALAR_MAX_FUNC] = {
				"sin($)",
				"cos($)",
				"tan($)",
				"asin($)",
				"acos($)",
				"atan($)",
				"sinh($)",
				"cosh($)",
				"tanh($)",
				"log($)",
				"exp($)",
				"sqrt($)",
				"abs($)",
				"sign($)",
				"floor($)",
				"round($)",
				"ceil($)",
				"fract($)",
				"min(max($,0),1)",
				"-($)",
			};

			int func = p_node->param1;
			ERR_FAIL_INDEX(func, SCALAR_MAX_FUNC);
			code += OUTNAME(p_node->id, 0) + "=" + String(scalar_func_id[func]).replace("$", p_inputs[0]) + ";\n";

		} break;
		case NODE_VEC_FUNC: {
			DEF_VEC(0);
			static const char *vec_func_id[VEC_MAX_FUNC] = {
				"normalize($)",
				"max(min($,vec3(1,1,1)),vec3(0,0,0))",
				"-($)",
				"1.0/($)",
				"",
				"",
			};

			int func = p_node->param1;
			ERR_FAIL_INDEX(func, VEC_MAX_FUNC);
			if (func == VEC_FUNC_RGB2HSV) {
				code += OUTNAME(p_node->id, 0) + ";\n";
				code += "{\n";
				code += "\tvec3 c = " + p_inputs[0] + ";\n";
				code += "\tvec4 K = vec4(0.0, -1.0 / 3.0, 2.0 / 3.0, -1.0);\n";
				code += "\tvec4 p = mix(vec4(c.bg, K.wz), vec4(c.gb, K.xy), step(c.b, c.g));\n";
				code += "\tvec4 q = mix(vec4(p.xyw, c.r), vec4(c.r, p.yzx), step(p.x, c.r));\n";
				code += "\tfloat d = q.x - min(q.w, q.y);\n";
				code += "\tfloat e = 1.0e-10;\n";
				code += "\t" + OUTVAR(p_node->id, 0) + "=vec3(abs(q.z + (q.w - q.y) / (6.0 * d + e)), d / (q.x + e), q.x);\n";
				code += "}\n";
			} else if (func == VEC_FUNC_HSV2RGB) {
				code += OUTNAME(p_node->id, 0) + ";\n";
				code += "{\n";
				code += "\tvec3 c = " + p_inputs[0] + ";\n";
				code += "\tvec4 K = vec4(1.0, 2.0 / 3.0, 1.0 / 3.0, 3.0);\n";
				code += "\tvec3 p = abs(fract(c.xxx + K.xyz) * 6.0 - K.www);\n";
				code += "\t" + OUTVAR(p_node->id, 0) + "=c.z * mix(K.xxx, clamp(p - K.xxx, 0.0, 1.0), c.y);\n";
				code += "}\n";

			} else {
				code += OUTNAME(p_node->id, 0) + "=" + String(vec_func_id[func]).replace("$", p_inputs[0]) + ";\n";
			}
		} break;
		case NODE_VEC_LEN: {
			DEF_VEC(0);

			code += OUTNAME(p_node->id, 0) + "=length(" + p_inputs[0] + ");\n";

		} break;
		case NODE_DOT_PROD: {
			DEF_VEC(0);
			DEF_VEC(1);
			code += OUTNAME(p_node->id, 0) + "=dot(" + p_inputs[1] + "," + p_inputs[0] + ");\n";

		} break;
		case NODE_VEC_TO_SCALAR: {
			DEF_VEC(0);
			code += OUTNAME(p_node->id, 0) + "=" + p_inputs[0] + ".x;\n";
			code += OUTNAME(p_node->id, 1) + "=" + p_inputs[0] + ".y;\n";
			code += OUTNAME(p_node->id, 2) + "=" + p_inputs[0] + ".z;\n";

		} break;
		case NODE_SCALAR_TO_VEC: {
			DEF_SCALAR(0);
			DEF_SCALAR(1);
			DEF_SCALAR(2);
			code += OUTNAME(p_node->id, 0) + "=vec3(" + p_inputs[0] + "," + p_inputs[1] + "," + p_inputs[2] + "" + ");\n";

		} break;
		case NODE_VEC_TO_XFORM: {
			DEF_VEC(0);
			DEF_VEC(1);
			DEF_VEC(2);
			DEF_VEC(3);
			code += OUTNAME(p_node->id, 0) + "=mat4(" +
					"vec4(" + p_inputs[0] + ".x," + p_inputs[0] + ".y," + p_inputs[0] + ".z, 0.0),"
																						"vec4(" +
					p_inputs[1] + ".x," + p_inputs[1] + ".y," + p_inputs[1] + ".z, 0.0),"
																			  "vec4(" +
					p_inputs[2] + ".x," + p_inputs[2] + ".y," + p_inputs[2] + ".z, 0.0),"
																			  "vec4(" +
					p_inputs[3] + ".x," + p_inputs[3] + ".y," + p_inputs[3] + ".z, 1.0));\n";

		} break;
		case NODE_XFORM_TO_VEC: {
			DEF_MATRIX(0);
			code += OUTNAME(p_node->id, 0) + ";\n";
			code += OUTNAME(p_node->id, 1) + ";\n";
			code += OUTNAME(p_node->id, 2) + ";\n";
			code += OUTNAME(p_node->id, 3) + ";\n";
			code += "{\n";
			code += "\tvec4 xform_row_01=" + p_inputs[0] + ".x;\n";
			code += "\tvec4 xform_row_02=" + p_inputs[0] + ".y;\n";
			code += "\tvec4 xform_row_03=" + p_inputs[0] + ".z;\n";
			code += "\tvec4 xform_row_04=" + p_inputs[0] + ".w;\n";
			code += "\t" + OUTVAR(p_node->id, 0) + "=vec3(xform_row_01.x, xform_row_01.y, xform_row_01.z);\n";
			code += "\t" + OUTVAR(p_node->id, 1) + "=vec3(xform_row_02.x, xform_row_02.y, xform_row_02.z);\n";
			code += "\t" + OUTVAR(p_node->id, 2) + "=vec3(xform_row_03.x, xform_row_03.y, xform_row_03.z);\n";
			code += "\t" + OUTVAR(p_node->id, 3) + "=vec3(xform_row_04.x, xform_row_04.y, xform_row_04.z);\n";
			code += "}\n";
		} break;
		case NODE_SCALAR_INTERP: {
			DEF_SCALAR(0);
			DEF_SCALAR(1);
			DEF_SCALAR(2);

			code += OUTNAME(p_node->id, 0) + "=mix(" + p_inputs[0] + "," + p_inputs[1] + "," + p_inputs[2] + ");\n";

		} break;
		case NODE_VEC_INTERP: {
			DEF_VEC(0);
			DEF_VEC(1);
			DEF_SCALAR(2);
			code += OUTNAME(p_node->id, 0) + "=mix(" + p_inputs[0] + "," + p_inputs[1] + "," + p_inputs[2] + ");\n";

		} break;
		case NODE_COLOR_RAMP: {
			DEF_SCALAR(0);

			static const int color_ramp_len = 512;
			DVector<uint8_t> cramp;
			cramp.resize(color_ramp_len * 4);
			{

				DVector<Color> colors = p_node->param1;
				DVector<real_t> offsets = p_node->param2;
				int cc = colors.size();
				DVector<uint8_t>::Write crw = cramp.write();
				DVector<Color>::Read cr = colors.read();
				DVector<real_t>::Read ofr = offsets.read();

				int at = 0;
				Color color_at(0, 0, 0, 1);
				for (int i = 0; i <= cc; i++) {

					int pos;
					Color to;
					if (i == cc) {
						if (at == color_ramp_len)
							break;
						pos = color_ramp_len;
						to = Color(1, 1, 1, 1);
					} else {
						to = cr[i];
						pos = MIN(ofr[i] * color_ramp_len, color_ramp_len);
					}
					for (int j = at; j < pos; j++) {
						float t = (j - at) / float(pos - at);
						Color c = color_at.linear_interpolate(to, t);
						crw[j * 4 + 0] = Math::fast_ftoi(CLAMP(c.r * 255.0, 0, 255));
						crw[j * 4 + 1] = Math::fast_ftoi(CLAMP(c.g * 255.0, 0, 255));
						crw[j * 4 + 2] = Math::fast_ftoi(CLAMP(c.b * 255.0, 0, 255));
						crw[j * 4 + 3] = Math::fast_ftoi(CLAMP(c.a * 255.0, 0, 255));
					}

					at = pos;
					color_at = to;
				}
			}

			Image gradient(color_ramp_len, 1, 0, Image::FORMAT_RGBA, cramp);
			Ref<ImageTexture> it = memnew(ImageTexture);
			it->create_from_image(gradient, Texture::FLAG_FILTER | Texture::FLAG_MIPMAPS);

			String crampname = "cramp_" + itos(p_node->id);
			set_default_texture_param(crampname, it);

			code += "uniform texture " + crampname + ";\n";
			code += "vec4 " + crampname + "_r=tex(" + crampname + ",vec2(" + p_inputs[0] + ",0));\n";
			code += OUTNAME(p_node->id, 0) + "=" + crampname + "_r.rgb;\n";
			code += OUTNAME(p_node->id, 1) + "=" + crampname + "_r.a;\n";

		} break;
		case NODE_CURVE_MAP: {
			DEF_SCALAR(0);
			static const int curve_map_len = 256;
			bool mapped[256];
			zeromem(mapped, sizeof(mapped));
			DVector<uint8_t> cmap;
			cmap.resize(curve_map_len);
			{

				DVector<Point2> points = p_node->param1;
				int pc = points.size();
				DVector<uint8_t>::Write cmw = cmap.write();
				DVector<Point2>::Read pr = points.read();

				Vector2 prev = Vector2(0, 0);
				Vector2 prev2 = Vector2(0, 0);

				for (int i = -1; i < pc; i++) {

					Vector2 next;
					Vector2 next2;
					if (i + 1 >= pc) {
						next = Vector2(1, 1);
					} else {
						next = Vector2(pr[i + 1].x, pr[i + 1].y);
					}

					if (i + 2 >= pc) {
						next2 = Vector2(1, 1);
					} else {
						next2 = Vector2(pr[i + 2].x, pr[i + 2].y);
					}

					/*if (i==-1 && prev.offset==next.offset) {
						prev=next;
						continue;
					}*/

					_plot_curve(prev2, prev, next, next2, cmw.ptr(), mapped);

					prev2 = prev;
					prev = next;
				}

				uint8_t pp = 0;
				for (int i = 0; i < curve_map_len; i++) {

					if (!mapped[i]) {
						cmw[i] = pp;
					} else {
						pp = cmw[i];
					}
				}
			}

			Image gradient(curve_map_len, 1, 0, Image::FORMAT_GRAYSCALE, cmap);
			Ref<ImageTexture> it = memnew(ImageTexture);
			it->create_from_image(gradient, Texture::FLAG_FILTER | Texture::FLAG_MIPMAPS);

			String cmapname = "cmap_" + itos(p_node->id);
			set_default_texture_param(cmapname, it);

			code += "uniform texture " + cmapname + ";\n";
			code += OUTNAME(p_node->id, 0) + "=tex(" + cmapname + ",vec2(" + p_inputs[0] + ",0)).r;\n";

		} break;
		case NODE_SCALAR_INPUT: {
			String name = p_node->param1;
			float dv = p_node->param2;
			code += "uniform float " + name + "=" + rtos(dv) + ";\n";
			code += OUTNAME(p_node->id, 0) + "=" + name + ";\n";
		} break;
		case NODE_VEC_INPUT: {

			String name = p_node->param1;
			Vector3 dv = p_node->param2;
			code += "uniform vec3 " + name + "=vec3(" + rtos(dv.x) + "," + rtos(dv.y) + "," + rtos(dv.z) + ");\n";
			code += OUTNAME(p_node->id, 0) + "=" + name + ";\n";
		} break;
		case NODE_RGB_INPUT: {

			String name = p_node->param1;
			Color dv = p_node->param2;

			code += "uniform color " + name + "=vec4(" + rtos(dv.r) + "," + rtos(dv.g) + "," + rtos(dv.b) + "," + rtos(dv.a) + ");\n";
			code += OUTNAME(p_node->id, 0) + "=" + name + ".rgb;\n";
			code += OUTNAME(p_node->id, 1) + "=" + name + ".a;\n";

		} break;
		case NODE_XFORM_INPUT: {

			String name = p_node->param1;
			Transform dv = p_node->param2;

			code += "uniform mat4 " + name + "=mat4(\n";
			code += "\tvec4(vec3(" + rtos(dv.basis.get_axis(0).x) + "," + rtos(dv.basis.get_axis(0).y) + "," + rtos(dv.basis.get_axis(0).z) + "),0),\n";
			code += "\tvec4(vec3(" + rtos(dv.basis.get_axis(1).x) + "," + rtos(dv.basis.get_axis(1).y) + "," + rtos(dv.basis.get_axis(1).z) + "),0),\n";
			code += "\tvec4(vec3(" + rtos(dv.basis.get_axis(2).x) + "," + rtos(dv.basis.get_axis(2).y) + "," + rtos(dv.basis.get_axis(2).z) + "),0),\n";
			code += "\tvec4(vec3(" + rtos(dv.origin.x) + "," + rtos(dv.origin.y) + "," + rtos(dv.origin.z) + "),1)\n";
			code += ");";

			code += OUTNAME(p_node->id, 0) + "=" + name + ";\n";

		} break;
		case NODE_TEXTURE_INPUT: {
			DEF_VEC(0);
			String name = p_node->param1;
			String rname = "rt_read_tex" + itos(p_node->id);
			code += "uniform texture " + name + ";";
			code += "vec4 " + rname + "=tex(" + name + "," + p_inputs[0] + ".xy);\n";
			code += OUTNAME(p_node->id, 0) + "=" + rname + ".rgb;\n";
			code += OUTNAME(p_node->id, 1) + "=" + rname + ".a;\n";

		} break;
		case NODE_CUBEMAP_INPUT: {
			DEF_VEC(0);
			String name = p_node->param1;
			code += "uniform cubemap " + name + ";";
			String rname = "rt_read_tex" + itos(p_node->id);
			code += "vec4 " + rname + "=texcube(" + name + "," + p_inputs[0] + ".xy);\n";
			code += OUTNAME(p_node->id, 0) + "=" + rname + ".rgb;\n";
			code += OUTNAME(p_node->id, 1) + "=" + rname + ".a;\n";
		} break;
		case NODE_DEFAULT_TEXTURE: {
			DEF_VEC(0);

			if (get_mode() == MODE_CANVAS_ITEM && p_type == SHADER_TYPE_FRAGMENT) {

				String rname = "rt_default_tex" + itos(p_node->id);
				code += "vec4 " + rname + "=tex(TEXTURE," + p_inputs[0] + ".xy);\n";
				code += OUTNAME(p_node->id, 0) + "=" + rname + ".rgb;\n";
				code += OUTNAME(p_node->id, 1) + "=" + rname + ".a;\n";

			} else {
				//not supported
				code += OUTNAME(p_node->id, 0) + "=vec3(0,0,0);\n";
				code += OUTNAME(p_node->id, 1) + "=1.0;\n";
			}
		} break;
		case NODE_OUTPUT: {

		} break;
		case NODE_COMMENT: {

		} break;
		case NODE_TYPE_MAX: {
		}
	}
#undef DEF_SCALAR
#undef DEF_COLOR
#undef DEF_MATRIX
#undef DEF_VEC
}