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/*************************************************************************/
/* static_raycaster_embree.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2022 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. */
/*************************************************************************/
#ifdef TOOLS_ENABLED
#include "static_raycaster_embree.h"
#ifdef __SSE2__
#include <pmmintrin.h>
#endif
RTCDevice StaticRaycasterEmbree::embree_device;
StaticRaycaster *StaticRaycasterEmbree::create_embree_raycaster() {
return memnew(StaticRaycasterEmbree);
}
void StaticRaycasterEmbree::make_default_raycaster() {
create_function = create_embree_raycaster;
}
void StaticRaycasterEmbree::free() {
if (embree_device) {
rtcReleaseDevice(embree_device);
}
}
bool StaticRaycasterEmbree::intersect(Ray &r_ray) {
RTCIntersectContext context;
rtcInitIntersectContext(&context);
rtcIntersect1(embree_scene, &context, (RTCRayHit *)&r_ray);
return r_ray.geomID != RTC_INVALID_GEOMETRY_ID;
}
void StaticRaycasterEmbree::intersect(Vector<Ray> &r_rays) {
Ray *rays = r_rays.ptrw();
for (int i = 0; i < r_rays.size(); ++i) {
intersect(rays[i]);
}
}
void StaticRaycasterEmbree::add_mesh(const PackedVector3Array &p_vertices, const PackedInt32Array &p_indices, unsigned int p_id) {
RTCGeometry embree_mesh = rtcNewGeometry(embree_device, RTC_GEOMETRY_TYPE_TRIANGLE);
int vertex_count = p_vertices.size();
Vector3 *embree_vertices = (Vector3 *)rtcSetNewGeometryBuffer(embree_mesh, RTC_BUFFER_TYPE_VERTEX, 0, RTC_FORMAT_FLOAT3, sizeof(Vector3), vertex_count);
memcpy(embree_vertices, p_vertices.ptr(), sizeof(Vector3) * vertex_count);
if (p_indices.is_empty()) {
ERR_FAIL_COND(vertex_count % 3 != 0);
uint32_t *embree_triangles = (uint32_t *)rtcSetNewGeometryBuffer(embree_mesh, RTC_BUFFER_TYPE_INDEX, 0, RTC_FORMAT_UINT3, sizeof(uint32_t) * 3, vertex_count / 3);
for (int i = 0; i < vertex_count; i++) {
embree_triangles[i] = i;
}
} else {
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);
memcpy(embree_triangles, p_indices.ptr(), sizeof(uint32_t) * p_indices.size());
}
rtcCommitGeometry(embree_mesh);
rtcAttachGeometryByID(embree_scene, embree_mesh, p_id);
rtcReleaseGeometry(embree_mesh);
}
void StaticRaycasterEmbree::commit() {
rtcCommitScene(embree_scene);
}
void StaticRaycasterEmbree::set_mesh_filter(const HashSet<int> &p_mesh_ids) {
for (const int &E : p_mesh_ids) {
rtcDisableGeometry(rtcGetGeometry(embree_scene, E));
}
rtcCommitScene(embree_scene);
filter_meshes = p_mesh_ids;
}
void StaticRaycasterEmbree::clear_mesh_filter() {
for (const int &E : filter_meshes) {
rtcEnableGeometry(rtcGetGeometry(embree_scene, E));
}
rtcCommitScene(embree_scene);
filter_meshes.clear();
}
void embree_error_handler(void *p_user_data, RTCError p_code, const char *p_str) {
print_error("Embree error: " + String(p_str));
}
StaticRaycasterEmbree::StaticRaycasterEmbree() {
#ifdef __SSE2__
_MM_SET_FLUSH_ZERO_MODE(_MM_FLUSH_ZERO_ON);
_MM_SET_DENORMALS_ZERO_MODE(_MM_DENORMALS_ZERO_ON);
#endif
if (!embree_device) {
embree_device = rtcNewDevice(nullptr);
rtcSetDeviceErrorFunction(embree_device, &embree_error_handler, nullptr);
}
embree_scene = rtcNewScene(embree_device);
}
StaticRaycasterEmbree::~StaticRaycasterEmbree() {
if (embree_scene != nullptr) {
rtcReleaseScene(embree_scene);
}
}
#endif // TOOLS_ENABLED
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