380 lines
13 KiB
C++
380 lines
13 KiB
C++
/*************************************************************************/
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/* xr_server.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#include "xr_server.h"
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#include "core/config/project_settings.h"
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#include "xr/xr_interface.h"
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#include "xr/xr_positional_tracker.h"
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XRServer *XRServer::singleton = nullptr;
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XRServer *XRServer::get_singleton() {
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return singleton;
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};
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void XRServer::_bind_methods() {
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ClassDB::bind_method(D_METHOD("get_world_scale"), &XRServer::get_world_scale);
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ClassDB::bind_method(D_METHOD("set_world_scale"), &XRServer::set_world_scale);
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ClassDB::bind_method(D_METHOD("get_reference_frame"), &XRServer::get_reference_frame);
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ClassDB::bind_method(D_METHOD("center_on_hmd", "rotation_mode", "keep_height"), &XRServer::center_on_hmd);
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ClassDB::bind_method(D_METHOD("get_hmd_transform"), &XRServer::get_hmd_transform);
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ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "world_scale"), "set_world_scale", "get_world_scale");
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ClassDB::bind_method(D_METHOD("get_interface_count"), &XRServer::get_interface_count);
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ClassDB::bind_method(D_METHOD("get_interface", "idx"), &XRServer::get_interface);
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ClassDB::bind_method(D_METHOD("get_interfaces"), &XRServer::get_interfaces);
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ClassDB::bind_method(D_METHOD("find_interface", "name"), &XRServer::find_interface);
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ClassDB::bind_method(D_METHOD("get_tracker_count"), &XRServer::get_tracker_count);
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ClassDB::bind_method(D_METHOD("get_tracker", "idx"), &XRServer::get_tracker);
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ClassDB::bind_method(D_METHOD("get_primary_interface"), &XRServer::get_primary_interface);
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ClassDB::bind_method(D_METHOD("set_primary_interface", "interface"), &XRServer::set_primary_interface);
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ADD_PROPERTY(PropertyInfo(Variant::OBJECT, "primary_interface"), "set_primary_interface", "get_primary_interface");
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ClassDB::bind_method(D_METHOD("get_last_process_usec"), &XRServer::get_last_process_usec);
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ClassDB::bind_method(D_METHOD("get_last_commit_usec"), &XRServer::get_last_commit_usec);
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ClassDB::bind_method(D_METHOD("get_last_frame_usec"), &XRServer::get_last_frame_usec);
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BIND_ENUM_CONSTANT(TRACKER_CONTROLLER);
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BIND_ENUM_CONSTANT(TRACKER_BASESTATION);
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BIND_ENUM_CONSTANT(TRACKER_ANCHOR);
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BIND_ENUM_CONSTANT(TRACKER_ANY_KNOWN);
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BIND_ENUM_CONSTANT(TRACKER_UNKNOWN);
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BIND_ENUM_CONSTANT(TRACKER_ANY);
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BIND_ENUM_CONSTANT(RESET_FULL_ROTATION);
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BIND_ENUM_CONSTANT(RESET_BUT_KEEP_TILT);
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BIND_ENUM_CONSTANT(DONT_RESET_ROTATION);
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ADD_SIGNAL(MethodInfo("interface_added", PropertyInfo(Variant::STRING_NAME, "interface_name")));
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ADD_SIGNAL(MethodInfo("interface_removed", PropertyInfo(Variant::STRING_NAME, "interface_name")));
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ADD_SIGNAL(MethodInfo("tracker_added", PropertyInfo(Variant::STRING_NAME, "tracker_name"), PropertyInfo(Variant::INT, "type"), PropertyInfo(Variant::INT, "id")));
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ADD_SIGNAL(MethodInfo("tracker_removed", PropertyInfo(Variant::STRING_NAME, "tracker_name"), PropertyInfo(Variant::INT, "type"), PropertyInfo(Variant::INT, "id")));
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};
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real_t XRServer::get_world_scale() const {
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return world_scale;
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};
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void XRServer::set_world_scale(real_t p_world_scale) {
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if (p_world_scale < 0.01) {
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p_world_scale = 0.01;
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} else if (p_world_scale > 1000.0) {
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p_world_scale = 1000.0;
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}
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world_scale = p_world_scale;
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};
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Transform XRServer::get_world_origin() const {
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return world_origin;
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};
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void XRServer::set_world_origin(const Transform &p_world_origin) {
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world_origin = p_world_origin;
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};
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Transform XRServer::get_reference_frame() const {
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return reference_frame;
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};
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void XRServer::center_on_hmd(RotationMode p_rotation_mode, bool p_keep_height) {
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if (primary_interface != nullptr) {
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// clear our current reference frame or we'll end up double adjusting it
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reference_frame = Transform();
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// requesting our EYE_MONO transform should return our current HMD position
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Transform new_reference_frame = primary_interface->get_transform_for_eye(XRInterface::EYE_MONO, Transform());
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// remove our tilt
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if (p_rotation_mode == 1) {
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// take the Y out of our Z
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new_reference_frame.basis.set_axis(2, Vector3(new_reference_frame.basis.elements[0][2], 0.0, new_reference_frame.basis.elements[2][2]).normalized());
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// Y is straight up
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new_reference_frame.basis.set_axis(1, Vector3(0.0, 1.0, 0.0));
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// and X is our cross reference
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new_reference_frame.basis.set_axis(0, new_reference_frame.basis.get_axis(1).cross(new_reference_frame.basis.get_axis(2)).normalized());
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} else if (p_rotation_mode == 2) {
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// remove our rotation, we're only interesting in centering on position
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new_reference_frame.basis = Basis();
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};
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// don't negate our height
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if (p_keep_height) {
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new_reference_frame.origin.y = 0.0;
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};
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reference_frame = new_reference_frame.inverse();
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};
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};
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Transform XRServer::get_hmd_transform() {
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Transform hmd_transform;
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if (primary_interface != nullptr) {
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hmd_transform = primary_interface->get_transform_for_eye(XRInterface::EYE_MONO, hmd_transform);
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};
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return hmd_transform;
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};
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void XRServer::add_interface(const Ref<XRInterface> &p_interface) {
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ERR_FAIL_COND(p_interface.is_null());
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for (int i = 0; i < interfaces.size(); i++) {
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if (interfaces[i] == p_interface) {
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ERR_PRINT("Interface was already added");
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return;
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};
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};
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interfaces.push_back(p_interface);
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emit_signal("interface_added", p_interface->get_name());
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};
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void XRServer::remove_interface(const Ref<XRInterface> &p_interface) {
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ERR_FAIL_COND(p_interface.is_null());
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int idx = -1;
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for (int i = 0; i < interfaces.size(); i++) {
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if (interfaces[i] == p_interface) {
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idx = i;
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break;
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};
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};
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ERR_FAIL_COND(idx == -1);
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print_verbose("XR: Removed interface" + p_interface->get_name());
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emit_signal("interface_removed", p_interface->get_name());
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interfaces.remove(idx);
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};
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int XRServer::get_interface_count() const {
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return interfaces.size();
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};
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Ref<XRInterface> XRServer::get_interface(int p_index) const {
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ERR_FAIL_INDEX_V(p_index, interfaces.size(), nullptr);
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return interfaces[p_index];
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};
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Ref<XRInterface> XRServer::find_interface(const String &p_name) const {
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int idx = -1;
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for (int i = 0; i < interfaces.size(); i++) {
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if (interfaces[i]->get_name() == p_name) {
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idx = i;
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break;
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};
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};
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ERR_FAIL_COND_V(idx == -1, nullptr);
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return interfaces[idx];
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};
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Array XRServer::get_interfaces() const {
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Array ret;
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for (int i = 0; i < interfaces.size(); i++) {
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Dictionary iface_info;
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iface_info["id"] = i;
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iface_info["name"] = interfaces[i]->get_name();
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ret.push_back(iface_info);
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};
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return ret;
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};
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/*
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A little extra info on the tracker ids, these are unique per tracker type so we get some consistency in recognising our trackers, specifically controllers.
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The first controller that is turned of will get ID 1, the second will get ID 2, etc.
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The magic happens when one of the controllers is turned off, say controller 1 turns off, controller 2 will remain controller 2, controller 3 will remain controller 3.
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If controller number 1 is turned on again it again gets ID 1 unless another new controller was turned on since.
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The most likely scenario however is a controller that runs out of battery and another controller being used to replace it.
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Because the controllers are often linked to physical objects, say you're holding a shield in controller 1, your left hand, and a gun in controller 2, your right hand, and controller 1 dies:
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- using our tracker index would suddenly make the gun disappear and the shield jump into your right hand because controller 2 becomes controller 1.
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- using this approach the shield disappears or is no longer tracked, but the gun stays firmly in your right hand because that is still controller 2, further more, if controller 1 is replaced the shield will return.
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*/
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bool XRServer::is_tracker_id_in_use_for_type(TrackerType p_tracker_type, int p_tracker_id) const {
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for (int i = 0; i < trackers.size(); i++) {
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if (trackers[i]->get_type() == p_tracker_type && trackers[i]->get_tracker_id() == p_tracker_id) {
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return true;
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};
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};
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// all good
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return false;
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};
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int XRServer::get_free_tracker_id_for_type(TrackerType p_tracker_type) {
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// We start checking at 1, 0 means that it's not a controller..
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// Note that for controller we reserve:
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// - 1 for the left hand controller and
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// - 2 for the right hand controller
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// so we start at 3 :)
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int tracker_id = p_tracker_type == XRServer::TRACKER_CONTROLLER ? 3 : 1;
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while (is_tracker_id_in_use_for_type(p_tracker_type, tracker_id)) {
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// try the next one
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tracker_id++;
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};
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return tracker_id;
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};
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void XRServer::add_tracker(XRPositionalTracker *p_tracker) {
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ERR_FAIL_NULL(p_tracker);
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trackers.push_back(p_tracker);
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emit_signal("tracker_added", p_tracker->get_name(), p_tracker->get_type(), p_tracker->get_tracker_id());
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};
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void XRServer::remove_tracker(XRPositionalTracker *p_tracker) {
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ERR_FAIL_NULL(p_tracker);
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int idx = -1;
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for (int i = 0; i < trackers.size(); i++) {
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if (trackers[i] == p_tracker) {
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idx = i;
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break;
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};
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};
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ERR_FAIL_COND(idx == -1);
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emit_signal("tracker_removed", p_tracker->get_name(), p_tracker->get_type(), p_tracker->get_tracker_id());
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trackers.remove(idx);
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};
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int XRServer::get_tracker_count() const {
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return trackers.size();
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};
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XRPositionalTracker *XRServer::get_tracker(int p_index) const {
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ERR_FAIL_INDEX_V(p_index, trackers.size(), nullptr);
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return trackers[p_index];
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};
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XRPositionalTracker *XRServer::find_by_type_and_id(TrackerType p_tracker_type, int p_tracker_id) const {
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ERR_FAIL_COND_V(p_tracker_id == 0, nullptr);
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for (int i = 0; i < trackers.size(); i++) {
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if (trackers[i]->get_type() == p_tracker_type && trackers[i]->get_tracker_id() == p_tracker_id) {
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return trackers[i];
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};
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};
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return nullptr;
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};
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Ref<XRInterface> XRServer::get_primary_interface() const {
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return primary_interface;
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};
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void XRServer::set_primary_interface(const Ref<XRInterface> &p_primary_interface) {
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primary_interface = p_primary_interface;
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print_verbose("XR: Primary interface set to: " + primary_interface->get_name());
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};
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void XRServer::clear_primary_interface_if(const Ref<XRInterface> &p_primary_interface) {
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if (primary_interface == p_primary_interface) {
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print_verbose("XR: Clearing primary interface");
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primary_interface.unref();
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};
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};
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uint64_t XRServer::get_last_process_usec() {
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return last_process_usec;
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};
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uint64_t XRServer::get_last_commit_usec() {
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return last_commit_usec;
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};
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uint64_t XRServer::get_last_frame_usec() {
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return last_frame_usec;
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};
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void XRServer::_process() {
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/* called from renderer_viewport.draw_viewports right before we start drawing our viewports */
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/* mark for our frame timing */
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last_process_usec = OS::get_singleton()->get_ticks_usec();
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/* process all active interfaces */
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for (int i = 0; i < interfaces.size(); i++) {
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if (!interfaces[i].is_valid()) {
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// ignore, not a valid reference
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} else if (interfaces[i]->is_initialized()) {
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interfaces.write[i]->process();
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};
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};
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};
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void XRServer::_mark_commit() {
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/* time this */
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last_commit_usec = OS::get_singleton()->get_ticks_usec();
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/* now store our difference as we may overwrite last_process_usec before this is accessed */
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last_frame_usec = last_commit_usec - last_process_usec;
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};
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XRServer::XRServer() {
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singleton = this;
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world_scale = 1.0;
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};
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XRServer::~XRServer() {
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primary_interface.unref();
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while (interfaces.size() > 0) {
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interfaces.remove(0);
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}
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while (trackers.size() > 0) {
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trackers.remove(0);
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}
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singleton = nullptr;
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};
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