1/**************************************************************************/
2/* static_raycaster_embree.cpp */
3/**************************************************************************/
4/* This file is part of: */
5/* GODOT ENGINE */
6/* https://godotengine.org */
7/**************************************************************************/
8/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
9/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
10/* */
11/* Permission is hereby granted, free of charge, to any person obtaining */
12/* a copy of this software and associated documentation files (the */
13/* "Software"), to deal in the Software without restriction, including */
14/* without limitation the rights to use, copy, modify, merge, publish, */
15/* distribute, sublicense, and/or sell copies of the Software, and to */
16/* permit persons to whom the Software is furnished to do so, subject to */
17/* the following conditions: */
18/* */
19/* The above copyright notice and this permission notice shall be */
20/* included in all copies or substantial portions of the Software. */
21/* */
22/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
23/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
24/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
25/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
26/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
27/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
28/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
29/**************************************************************************/
30
31#include "static_raycaster_embree.h"
32
33#ifdef TOOLS_ENABLED
34
35#ifdef __SSE2__
36#include <pmmintrin.h>
37#endif
38
39RTCDevice StaticRaycasterEmbree::embree_device;
40
41StaticRaycaster *StaticRaycasterEmbree::create_embree_raycaster() {
42 return memnew(StaticRaycasterEmbree);
43}
44
45void StaticRaycasterEmbree::make_default_raycaster() {
46 create_function = create_embree_raycaster;
47}
48
49void StaticRaycasterEmbree::free() {
50 if (embree_device) {
51 rtcReleaseDevice(embree_device);
52 }
53}
54
55bool StaticRaycasterEmbree::intersect(Ray &r_ray) {
56 RTCIntersectContext context;
57 rtcInitIntersectContext(&context);
58 rtcIntersect1(embree_scene, &context, (RTCRayHit *)&r_ray);
59 return r_ray.geomID != RTC_INVALID_GEOMETRY_ID;
60}
61
62void StaticRaycasterEmbree::intersect(Vector<Ray> &r_rays) {
63 Ray *rays = r_rays.ptrw();
64 for (int i = 0; i < r_rays.size(); ++i) {
65 intersect(rays[i]);
66 }
67}
68
69void StaticRaycasterEmbree::add_mesh(const PackedVector3Array &p_vertices, const PackedInt32Array &p_indices, unsigned int p_id) {
70 RTCGeometry embree_mesh = rtcNewGeometry(embree_device, RTC_GEOMETRY_TYPE_TRIANGLE);
71
72 int vertex_count = p_vertices.size();
73
74 Vector3 *embree_vertices = (Vector3 *)rtcSetNewGeometryBuffer(embree_mesh, RTC_BUFFER_TYPE_VERTEX, 0, RTC_FORMAT_FLOAT3, sizeof(Vector3), vertex_count);
75 memcpy(embree_vertices, p_vertices.ptr(), sizeof(Vector3) * vertex_count);
76
77 if (p_indices.is_empty()) {
78 ERR_FAIL_COND(vertex_count % 3 != 0);
79 uint32_t *embree_triangles = (uint32_t *)rtcSetNewGeometryBuffer(embree_mesh, RTC_BUFFER_TYPE_INDEX, 0, RTC_FORMAT_UINT3, sizeof(uint32_t) * 3, vertex_count / 3);
80 for (int i = 0; i < vertex_count; i++) {
81 embree_triangles[i] = i;
82 }
83 } else {
84 uint32_t *embree_triangles = (uint32_t *)rtcSetNewGeometryBuffer(embree_mesh, RTC_BUFFER_TYPE_INDEX, 0, RTC_FORMAT_UINT3, sizeof(uint32_t) * 3, p_indices.size() / 3);
85 memcpy(embree_triangles, p_indices.ptr(), sizeof(uint32_t) * p_indices.size());
86 }
87
88 rtcCommitGeometry(embree_mesh);
89 rtcAttachGeometryByID(embree_scene, embree_mesh, p_id);
90 rtcReleaseGeometry(embree_mesh);
91}
92
93void StaticRaycasterEmbree::commit() {
94 rtcCommitScene(embree_scene);
95}
96
97void StaticRaycasterEmbree::set_mesh_filter(const HashSet<int> &p_mesh_ids) {
98 for (const int &E : p_mesh_ids) {
99 rtcDisableGeometry(rtcGetGeometry(embree_scene, E));
100 }
101 rtcCommitScene(embree_scene);
102 filter_meshes = p_mesh_ids;
103}
104
105void StaticRaycasterEmbree::clear_mesh_filter() {
106 for (const int &E : filter_meshes) {
107 rtcEnableGeometry(rtcGetGeometry(embree_scene, E));
108 }
109 rtcCommitScene(embree_scene);
110 filter_meshes.clear();
111}
112
113void embree_error_handler(void *p_user_data, RTCError p_code, const char *p_str) {
114 print_error("Embree error: " + String(p_str));
115}
116
117StaticRaycasterEmbree::StaticRaycasterEmbree() {
118#ifdef __SSE2__
119 _MM_SET_FLUSH_ZERO_MODE(_MM_FLUSH_ZERO_ON);
120 _MM_SET_DENORMALS_ZERO_MODE(_MM_DENORMALS_ZERO_ON);
121#endif
122
123 if (!embree_device) {
124 embree_device = rtcNewDevice(nullptr);
125 rtcSetDeviceErrorFunction(embree_device, &embree_error_handler, nullptr);
126 }
127
128 embree_scene = rtcNewScene(embree_device);
129}
130
131StaticRaycasterEmbree::~StaticRaycasterEmbree() {
132 if (embree_scene != nullptr) {
133 rtcReleaseScene(embree_scene);
134 }
135}
136
137#endif // TOOLS_ENABLED
138