/*************************************************************************/
/*  mesh_data_tool.cpp                                                   */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
/*************************************************************************/
/* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur.                 */
/*                                                                       */
/* 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 "mesh_data_tool.h"


void MeshDataTool::clear() {

	vertices.clear();
	edges.clear();
	faces.clear();
	material = Ref<Material>();
	format=0;
}


Error MeshDataTool::create_from_surface(const Ref<Mesh>& p_mesh,int p_surface) {

	ERR_FAIL_COND_V(p_mesh.is_null(),ERR_INVALID_PARAMETER);

	ERR_FAIL_COND_V(p_mesh.is_null(),ERR_INVALID_PARAMETER);
	ERR_FAIL_COND_V(p_mesh->surface_get_primitive_type(p_surface)!=Mesh::PRIMITIVE_TRIANGLES,ERR_INVALID_PARAMETER);



	Array arrays = p_mesh->surface_get_arrays(p_surface);
	ERR_FAIL_COND_V( arrays.empty(), ERR_INVALID_PARAMETER );

	DVector<Vector3> varray = arrays[Mesh::ARRAY_VERTEX];

	int vcount = varray.size();
	ERR_FAIL_COND_V( vcount == 0, ERR_INVALID_PARAMETER);

	clear();
	format = p_mesh->surface_get_format(p_surface);
	material=p_mesh->surface_get_material(p_surface);

	DVector<Vector3>::Read vr = varray.read();

	DVector<Vector3>::Read nr;
	if (arrays[Mesh::ARRAY_NORMAL].get_type()!=Variant::NIL)
		nr = arrays[Mesh::ARRAY_NORMAL].operator DVector<Vector3>().read();

	DVector<real_t>::Read ta;
	if (arrays[Mesh::ARRAY_TANGENT].get_type()!=Variant::NIL)
		ta = arrays[Mesh::ARRAY_TANGENT].operator DVector<real_t>().read();

	DVector<Vector2>::Read uv;
	if (arrays[Mesh::ARRAY_TEX_UV].get_type()!=Variant::NIL)
		uv = arrays[Mesh::ARRAY_TEX_UV].operator DVector<Vector2>().read();
	DVector<Vector2>::Read uv2;
	if (arrays[Mesh::ARRAY_TEX_UV2].get_type()!=Variant::NIL)
		uv2 = arrays[Mesh::ARRAY_TEX_UV2].operator DVector<Vector2>().read();

	DVector<Color>::Read col;
	if (arrays[Mesh::ARRAY_COLOR].get_type()!=Variant::NIL)
		col = arrays[Mesh::ARRAY_COLOR].operator DVector<Color>().read();

	DVector<real_t>::Read bo;
	if (arrays[Mesh::ARRAY_BONES].get_type()!=Variant::NIL)
		bo = arrays[Mesh::ARRAY_BONES].operator DVector<real_t>().read();

	DVector<real_t>::Read we;
	if (arrays[Mesh::ARRAY_WEIGHTS].get_type()!=Variant::NIL)
		we = arrays[Mesh::ARRAY_WEIGHTS].operator DVector<real_t>().read();


	vertices.resize(vcount);

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

		Vertex v;
		v.vertex=vr[i];
		if (nr.ptr())
			v.normal=nr[i];
		if (ta.ptr())
			v.tangent=Plane(ta[i*4+0],ta[i*4+1],ta[i*4+2],ta[i*4+3]);
		if (uv.ptr())
			v.uv=uv[i];
		if (uv2.ptr())
			v.uv2=uv2[i];
		if (col.ptr())
			v.color=col[i];

		if (we.ptr()) {

			v.weights.push_back(we[i*4+0]);
			v.weights.push_back(we[i*4+1]);
			v.weights.push_back(we[i*4+2]);
			v.weights.push_back(we[i*4+3]);
		}

		if (bo.ptr()) {

			v.bones.push_back(bo[i*4+0]);
			v.bones.push_back(bo[i*4+1]);
			v.bones.push_back(bo[i*4+2]);
			v.bones.push_back(bo[i*4+3]);
		}

		vertices[i]=v;


	}


	DVector<int> indices;

	if (arrays[Mesh::ARRAY_INDEX].get_type()!=Variant::NIL) {

		indices = arrays[Mesh::ARRAY_INDEX];
	} else {
		//make code simpler
		indices.resize(vcount);
		DVector<int>::Write iw=indices.write();
		for(int i=0;i<vcount;i++)
			iw[i]=i;
	}


	int icount=indices.size();
	DVector<int>::Read r = indices.read();


	Map<Point2i,int> edge_indices;

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

		Vertex*v[3]={ &vertices[r[i+0]], &vertices[r[i+1]], &vertices[r[i+2]] };

		int fidx=faces.size();
		Face face;

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

			face.v[j]=r[i+j];

			Point2i edge(r[i+j],r[i+(j+1)%3]);
			if (edge.x > edge.y) {
				SWAP(edge.x,edge.y);
			}

			if (edge_indices.has(edge)) {
				face.edges[j]=edge_indices[edge];

			} else {
				face.edges[j]=edge_indices.size();
				edge_indices[edge]=face.edges[j];
				Edge e;
				e.vertex[0]=edge.x;
				e.vertex[1]=edge.y;
				edges.push_back(e);
			}

			edges[face.edges[j]].faces.push_back(fidx);
			v[j]->faces.push_back(fidx);
			v[j]->edges.push_back(face.edges[j]);
		}


		faces.push_back(face);
	}


	return OK;
}

Error MeshDataTool::commit_to_surface(const Ref<Mesh>& p_mesh) {

	ERR_FAIL_COND_V(p_mesh.is_null(),ERR_INVALID_PARAMETER);
	Array arr;
	arr.resize(Mesh::ARRAY_MAX);


	int vcount=vertices.size();

	DVector<Vector3> v;
	DVector<Vector3> n;
	DVector<real_t> t;
	DVector<Vector2> u;
	DVector<Vector2> u2;
	DVector<Color> c;
	DVector<real_t> b;
	DVector<real_t> w;
	DVector<int> in;

	{

		v.resize(vcount);
		DVector<Vector3>::Write vr=v.write();

		DVector<Vector3>::Write nr;
		if (format&Mesh::ARRAY_FORMAT_NORMAL) {
			n.resize(vcount);
			nr = n.write();
		}

		DVector<real_t>::Write ta;
		if (format&Mesh::ARRAY_FORMAT_TANGENT) {
			t.resize(vcount*4);
			ta = t.write();
		}


		DVector<Vector2>::Write uv;
		if (format&Mesh::ARRAY_FORMAT_TEX_UV) {
			u.resize(vcount);
			uv = u.write();
		}

		DVector<Vector2>::Write uv2;
		if (format&Mesh::ARRAY_FORMAT_TEX_UV2) {
			u2.resize(vcount);
			uv2 = u2.write();
		}

		DVector<Color>::Write col;
		if (format&Mesh::ARRAY_FORMAT_COLOR) {
			c.resize(vcount);
			col = c.write();
		}

		DVector<real_t>::Write bo;
		if (format&Mesh::ARRAY_FORMAT_BONES) {
			b.resize(vcount*4);
			bo = b.write();
		}

		DVector<real_t>::Write we;
		if (format&Mesh::ARRAY_FORMAT_WEIGHTS) {
			w.resize(vcount*4);
			we = w.write();
		}


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

			Vertex &vtx=vertices[i];

			vr[i]=vtx.vertex;
			if (nr.ptr())
				nr[i]=vtx.normal;
			if (ta.ptr()) {
				ta[i*4+0]=vtx.tangent.normal.x;
				ta[i*4+1]=vtx.tangent.normal.y;
				ta[i*4+2]=vtx.tangent.normal.z;
				ta[i*4+3]=vtx.tangent.d;
			}
			if (uv.ptr())
				uv[i]=vtx.uv;
			if (uv2.ptr())
				uv2[i]=vtx.uv2;
			if (col.ptr())
				col[i]=vtx.color;

			if (we.ptr()) {

				we[i*4+0]=vtx.weights[0];
				we[i*4+1]=vtx.weights[1];
				we[i*4+2]=vtx.weights[2];
				we[i*4+3]=vtx.weights[3];

			}

			if (bo.ptr()) {

				bo[i*4+0]=vtx.bones[0];
				bo[i*4+1]=vtx.bones[1];
				bo[i*4+2]=vtx.bones[2];
				bo[i*4+3]=vtx.bones[3];
			}

		}

		int fc = faces.size();
		in.resize(fc*3);
		DVector<int>::Write iw=in.write();
		for(int i=0;i<fc;i++) {

			iw[i*3+0]=faces[i].v[0];
			iw[i*3+1]=faces[i].v[1];
			iw[i*3+2]=faces[i].v[2];
		}

	}

	arr[Mesh::ARRAY_VERTEX]=v;
	arr[Mesh::ARRAY_INDEX]=in;
	if (n.size())
		arr[Mesh::ARRAY_NORMAL]=n;
	if (c.size())
		arr[Mesh::ARRAY_COLOR]=c;
	if (u.size())
		arr[Mesh::ARRAY_TEX_UV]=u;
	if (u2.size())
		arr[Mesh::ARRAY_TEX_UV2]=u2;
	if (t.size())
		arr[Mesh::ARRAY_TANGENT]=t;
	if (b.size())
		arr[Mesh::ARRAY_BONES]=b;
	if (w.size())
		arr[Mesh::ARRAY_WEIGHTS]=w;

	Ref<Mesh> ncmesh=p_mesh;
	int sc = ncmesh->get_surface_count();
	ncmesh->add_surface_from_arrays(Mesh::PRIMITIVE_TRIANGLES,arr);
	ncmesh->surface_set_material(sc,material);

	return OK;
}

int MeshDataTool::get_format() const {

	return format;
}

int MeshDataTool::get_vertex_count() const {

	return vertices.size();
}
int MeshDataTool::get_edge_count() const{

	return edges.size();
}
int MeshDataTool::get_face_count() const{

	return faces.size();
}

Vector3 MeshDataTool::get_vertex(int p_idx) const {

	ERR_FAIL_INDEX_V(p_idx,vertices.size(),Vector3());
	return vertices[p_idx].vertex;
}
void MeshDataTool::set_vertex(int p_idx,const Vector3& p_vertex){

	ERR_FAIL_INDEX(p_idx,vertices.size());
	vertices[p_idx].vertex=p_vertex;

}

Vector3 MeshDataTool::get_vertex_normal(int p_idx) const{

	ERR_FAIL_INDEX_V(p_idx,vertices.size(),Vector3());
	return vertices[p_idx].normal;

}
void MeshDataTool::set_vertex_normal(int p_idx,const Vector3& p_normal){

	ERR_FAIL_INDEX(p_idx,vertices.size());
	vertices[p_idx].normal=p_normal;
	format|=Mesh::ARRAY_FORMAT_NORMAL;

}

Plane MeshDataTool::get_vertex_tangent(int p_idx) const{

	ERR_FAIL_INDEX_V(p_idx,vertices.size(),Plane());
	return vertices[p_idx].tangent;

}
void MeshDataTool::set_vertex_tangent(int p_idx,const Plane& p_tangent){

	ERR_FAIL_INDEX(p_idx,vertices.size());
	vertices[p_idx].tangent=p_tangent;
	format|=Mesh::ARRAY_FORMAT_TANGENT;

}

Vector2 MeshDataTool::get_vertex_uv(int p_idx) const{

	ERR_FAIL_INDEX_V(p_idx,vertices.size(),Vector2());
	return vertices[p_idx].uv;

}
void MeshDataTool::set_vertex_uv(int p_idx,const Vector2& p_uv){

	ERR_FAIL_INDEX(p_idx,vertices.size());
	vertices[p_idx].uv=p_uv;
	format|=Mesh::ARRAY_FORMAT_TEX_UV;

}

Vector2 MeshDataTool::get_vertex_uv2(int p_idx) const{

	ERR_FAIL_INDEX_V(p_idx,vertices.size(),Vector2());
	return vertices[p_idx].uv2;

}
void MeshDataTool::set_vertex_uv2(int p_idx,const Vector2& p_uv2){

	ERR_FAIL_INDEX(p_idx,vertices.size());
	vertices[p_idx].uv2=p_uv2;
	format|=Mesh::ARRAY_FORMAT_TEX_UV2;

}

Color MeshDataTool::get_vertex_color(int p_idx) const{

	ERR_FAIL_INDEX_V(p_idx,vertices.size(),Color());
	return vertices[p_idx].color;


}
void MeshDataTool::set_vertex_color(int p_idx,const Color& p_color){

	ERR_FAIL_INDEX(p_idx,vertices.size());
	vertices[p_idx].color=p_color;
	format|=Mesh::ARRAY_FORMAT_COLOR;

}

Vector<int> MeshDataTool::get_vertex_bones(int p_idx) const{

	ERR_FAIL_INDEX_V(p_idx,vertices.size(),Vector<int>());
	return vertices[p_idx].bones;

}
void MeshDataTool::set_vertex_bones(int p_idx,const Vector<int>& p_bones){

	ERR_FAIL_INDEX(p_idx,vertices.size());
	vertices[p_idx].bones=p_bones;
	format|=Mesh::ARRAY_FORMAT_BONES;

}

Vector<float> MeshDataTool::get_vertex_weights(int p_idx) const{

	ERR_FAIL_INDEX_V(p_idx,vertices.size(),Vector<float>());
	return vertices[p_idx].weights;

}
void MeshDataTool::set_vertex_weights(int p_idx,const Vector<float>& p_weights){
	ERR_FAIL_INDEX(p_idx,vertices.size());
	vertices[p_idx].weights=p_weights;
	format|=Mesh::ARRAY_FORMAT_WEIGHTS;


}

Variant MeshDataTool::get_vertex_meta(int p_idx) const{

	ERR_FAIL_INDEX_V(p_idx,vertices.size(),Variant());
	return vertices[p_idx].meta;

}

void MeshDataTool::set_vertex_meta(int p_idx,const Variant& p_meta){

	ERR_FAIL_INDEX(p_idx,vertices.size());
	vertices[p_idx].meta=p_meta;

}

Vector<int> MeshDataTool::get_vertex_edges(int p_idx) const {

	ERR_FAIL_INDEX_V(p_idx,vertices.size(),Vector<int>());
	return vertices[p_idx].edges;

}
Vector<int> MeshDataTool::get_vertex_faces(int p_idx) const{

	ERR_FAIL_INDEX_V(p_idx,vertices.size(),Vector<int>());
	return vertices[p_idx].faces;

}

int MeshDataTool::get_edge_vertex(int p_edge,int p_vertex) const {

	ERR_FAIL_INDEX_V(p_edge,edges.size(),-1);
	ERR_FAIL_INDEX_V(p_vertex,2,-1);
	return edges[p_edge].vertex[p_vertex];

}
Vector<int> MeshDataTool::get_edge_faces(int p_edge) const{

	ERR_FAIL_INDEX_V(p_edge,edges.size(),Vector<int>());
	return edges[p_edge].faces;

}
Variant MeshDataTool::get_edge_meta(int p_idx) const{

	ERR_FAIL_INDEX_V(p_idx,edges.size(),Variant());
	return edges[p_idx].meta;

}
void MeshDataTool::set_edge_meta(int p_idx,const Variant& p_meta){

	ERR_FAIL_INDEX(p_idx,edges.size());
	edges[p_idx].meta=p_meta;
}

int MeshDataTool::get_face_vertex(int p_face,int p_vertex) const {

	ERR_FAIL_INDEX_V(p_face,faces.size(),-1);
	ERR_FAIL_INDEX_V(p_vertex,3,-1);
	return faces[p_face].v[p_vertex];

}
int MeshDataTool::get_face_edge(int p_face,int p_vertex) const{

	ERR_FAIL_INDEX_V(p_face,faces.size(),-1);
	ERR_FAIL_INDEX_V(p_vertex,3,-1);
	return faces[p_face].edges[p_vertex];

}
Variant MeshDataTool::get_face_meta(int p_face) const{

	ERR_FAIL_INDEX_V(p_face,faces.size(),Variant());
	return faces[p_face].meta;

}
void MeshDataTool::set_face_meta(int p_face,const Variant& p_meta){

	ERR_FAIL_INDEX(p_face,faces.size());
	faces[p_face].meta=p_meta;
}

Vector3 MeshDataTool::get_face_normal(int p_face) const {

	ERR_FAIL_INDEX_V(p_face,faces.size(),Vector3());
	Vector3 v0 = vertices[faces[p_face].v[0]].vertex;
	Vector3 v1 = vertices[faces[p_face].v[1]].vertex;
	Vector3 v2 = vertices[faces[p_face].v[2]].vertex;

	return Plane(v0,v1,v2).normal;

}

Ref<Material> MeshDataTool::get_material() const {

	return material;
}

void MeshDataTool::set_material(const Ref<Material> &p_material) {

	material=p_material;
}


void MeshDataTool::_bind_methods() {

	ClassDB::bind_method(_MD("clear"),&MeshDataTool::clear);
	ClassDB::bind_method(_MD("create_from_surface","mesh","surface"),&MeshDataTool::create_from_surface);
	ClassDB::bind_method(_MD("commit_to_surface","mesh"),&MeshDataTool::commit_to_surface);

	ClassDB::bind_method(_MD("get_format"),&MeshDataTool::get_format);

	ClassDB::bind_method(_MD("get_vertex_count"),&MeshDataTool::get_vertex_count);
	ClassDB::bind_method(_MD("get_edge_count"),&MeshDataTool::get_edge_count);
	ClassDB::bind_method(_MD("get_face_count"),&MeshDataTool::get_face_count);

	ClassDB::bind_method(_MD("set_vertex","idx","vertex"),&MeshDataTool::set_vertex);
	ClassDB::bind_method(_MD("get_vertex","idx"),&MeshDataTool::get_vertex);

	ClassDB::bind_method(_MD("set_vertex_normal","idx","normal"),&MeshDataTool::set_vertex_normal);
	ClassDB::bind_method(_MD("get_vertex_normal","idx"),&MeshDataTool::get_vertex_normal);

	ClassDB::bind_method(_MD("set_vertex_tangent","idx","tangent"),&MeshDataTool::set_vertex_tangent);
	ClassDB::bind_method(_MD("get_vertex_tangent","idx"),&MeshDataTool::get_vertex_tangent);

	ClassDB::bind_method(_MD("set_vertex_uv","idx","uv"),&MeshDataTool::set_vertex_uv);
	ClassDB::bind_method(_MD("get_vertex_uv","idx"),&MeshDataTool::get_vertex_uv);

	ClassDB::bind_method(_MD("set_vertex_uv2","idx","uv2"),&MeshDataTool::set_vertex_uv2);
	ClassDB::bind_method(_MD("get_vertex_uv2","idx"),&MeshDataTool::get_vertex_uv2);

	ClassDB::bind_method(_MD("set_vertex_color","idx","color"),&MeshDataTool::set_vertex_color);
	ClassDB::bind_method(_MD("get_vertex_color","idx"),&MeshDataTool::get_vertex_color);

	ClassDB::bind_method(_MD("set_vertex_bones","idx","bones"),&MeshDataTool::set_vertex_bones);
	ClassDB::bind_method(_MD("get_vertex_bones","idx"),&MeshDataTool::get_vertex_bones);

	ClassDB::bind_method(_MD("set_vertex_weights","idx","weights"),&MeshDataTool::set_vertex_weights);
	ClassDB::bind_method(_MD("get_vertex_weights","idx"),&MeshDataTool::get_vertex_weights);

	ClassDB::bind_method(_MD("set_vertex_meta","idx","meta"),&MeshDataTool::set_vertex_meta);
	ClassDB::bind_method(_MD("get_vertex_meta","idx"),&MeshDataTool::get_vertex_meta);

	ClassDB::bind_method(_MD("get_vertex_edges","idx"),&MeshDataTool::get_vertex_edges);
	ClassDB::bind_method(_MD("get_vertex_faces","idx"),&MeshDataTool::get_vertex_faces);

	ClassDB::bind_method(_MD("get_edge_vertex","idx","vertex"),&MeshDataTool::get_edge_vertex);
	ClassDB::bind_method(_MD("get_edge_faces","idx","faces"),&MeshDataTool::get_edge_faces);

	ClassDB::bind_method(_MD("set_edge_meta","idx","meta"),&MeshDataTool::set_edge_meta);
	ClassDB::bind_method(_MD("get_edge_meta","idx"),&MeshDataTool::get_edge_meta);

	ClassDB::bind_method(_MD("get_face_vertex","idx","vertex"),&MeshDataTool::get_face_vertex);
	ClassDB::bind_method(_MD("get_face_edge","idx","edge"),&MeshDataTool::get_face_edge);

	ClassDB::bind_method(_MD("set_face_meta","idx","meta"),&MeshDataTool::set_face_meta);
	ClassDB::bind_method(_MD("get_face_meta","idx"),&MeshDataTool::get_face_meta);

	ClassDB::bind_method(_MD("get_face_normal","idx"),&MeshDataTool::get_face_normal);

	ClassDB::bind_method(_MD("set_material","material:Material"),&MeshDataTool::set_material);
	ClassDB::bind_method(_MD("get_material","material"),&MeshDataTool::get_material);
}

MeshDataTool::MeshDataTool(){

	clear();
}