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197 | /**************************************************************************/
/* lightmap_raycaster_embree.cpp */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 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. */
/**************************************************************************/
#ifdef TOOLS_ENABLED
#include "lightmap_raycaster_embree.h"
#ifdef __SSE2__
#include <pmmintrin.h>
#endif
LightmapRaycaster *LightmapRaycasterEmbree::create_embree_raycaster() {
return memnew(LightmapRaycasterEmbree);
}
void LightmapRaycasterEmbree::make_default_raycaster() {
create_function = create_embree_raycaster;
}
void LightmapRaycasterEmbree::filter_function(const struct RTCFilterFunctionNArguments *p_args) {
RTCHit *hit = (RTCHit *)p_args->hit;
unsigned int geomID = hit->geomID;
float u = hit->u;
float v = hit->v;
LightmapRaycasterEmbree *scene = (LightmapRaycasterEmbree *)p_args->geometryUserPtr;<--- C-style pointer casting [+]C-style pointer casting detected. C++ offers four different kinds of casts as replacements: static_cast, const_cast, dynamic_cast and reinterpret_cast. A C-style cast could evaluate to any of those automatically, thus it is considered safer if the programmer explicitly states which kind of cast is expected. See also: https://www.securecoding.cert.org/confluence/display/cplusplus/EXP05-CPP.+Do+not+use+C-style+casts.
RTCGeometry geom = rtcGetGeometry(scene->embree_scene, geomID);
rtcInterpolate0(geom, hit->primID, hit->u, hit->v, RTC_BUFFER_TYPE_VERTEX_ATTRIBUTE, 0, &hit->u, 2);
if (scene->alpha_textures.has(geomID)) {
const AlphaTextureData &alpha_texture = scene->alpha_textures[geomID];
if (alpha_texture.sample(hit->u, hit->v) < 128) {
p_args->valid[0] = 0;
return;
}
}
rtcInterpolate0(geom, hit->primID, u, v, RTC_BUFFER_TYPE_VERTEX_ATTRIBUTE, 1, &hit->Ng_x, 3);
}
bool LightmapRaycasterEmbree::intersect(Ray &r_ray) {
RTCRayQueryContext context;
rtcInitRayQueryContext(&context);
RTCIntersectArguments args;
rtcInitIntersectArguments(&args);
args.context = &context;
rtcIntersect1(embree_scene, (RTCRayHit *)&r_ray, &args);
return r_ray.geomID != RTC_INVALID_GEOMETRY_ID;
}
void LightmapRaycasterEmbree::intersect(Vector<Ray> &r_rays) {
Ray *rays = r_rays.ptrw();
for (int i = 0; i < r_rays.size(); ++i) {
intersect(rays[i]);
}
}
void LightmapRaycasterEmbree::set_mesh_alpha_texture(Ref<Image> p_alpha_texture, unsigned int p_id) {
if (p_alpha_texture.is_valid() && p_alpha_texture->get_size() != Vector2i()) {
AlphaTextureData tex;
tex.size = p_alpha_texture->get_size();
tex.data = p_alpha_texture->get_data();
alpha_textures.insert(p_id, tex);
}
}
float blerp(float c00, float c10, float c01, float c11, float tx, float ty) {
return Math::lerp(Math::lerp(c00, c10, tx), Math::lerp(c01, c11, tx), ty);
}
uint8_t LightmapRaycasterEmbree::AlphaTextureData::sample(float u, float v) const {
float x = u * size.x;
float y = v * size.y;
int xi = (int)x;
int yi = (int)y;
uint8_t texels[4];
for (int i = 0; i < 4; ++i) {
int sample_x = CLAMP(xi + i % 2, 0, size.x - 1);
int sample_y = CLAMP(yi + i / 2, 0, size.y - 1);
texels[i] = data[sample_y * size.x + sample_x];
}
return Math::round(blerp(texels[0], texels[1], texels[2], texels[3], x - xi, y - yi));
}
void LightmapRaycasterEmbree::add_mesh(const Vector<Vector3> &p_vertices, const Vector<Vector3> &p_normals, const Vector<Vector2> &p_uv2s, unsigned int p_id) {
RTCGeometry embree_mesh = rtcNewGeometry(embree_device, RTC_GEOMETRY_TYPE_TRIANGLE);
rtcSetGeometryVertexAttributeCount(embree_mesh, 2);
int vertex_count = p_vertices.size();
ERR_FAIL_COND(vertex_count % 3 != 0);
ERR_FAIL_COND(vertex_count != p_uv2s.size());
ERR_FAIL_COND(!p_normals.is_empty() && vertex_count != p_normals.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);
Vector2 *embree_light_uvs = (Vector2 *)rtcSetNewGeometryBuffer(embree_mesh, RTC_BUFFER_TYPE_VERTEX_ATTRIBUTE, 0, RTC_FORMAT_FLOAT2, sizeof(Vector2), vertex_count);
memcpy(embree_light_uvs, p_uv2s.ptr(), sizeof(Vector2) * vertex_count);
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;
}
if (!p_normals.is_empty()) {
Vector3 *embree_normals = (Vector3 *)rtcSetNewGeometryBuffer(embree_mesh, RTC_BUFFER_TYPE_VERTEX_ATTRIBUTE, 1, RTC_FORMAT_FLOAT3, sizeof(Vector3), vertex_count);
memcpy(embree_normals, p_normals.ptr(), sizeof(Vector3) * vertex_count);
}
rtcCommitGeometry(embree_mesh);
rtcSetGeometryIntersectFilterFunction(embree_mesh, filter_function);
rtcSetGeometryUserData(embree_mesh, this);
rtcAttachGeometryByID(embree_scene, embree_mesh, p_id);
rtcReleaseGeometry(embree_mesh);
}
void LightmapRaycasterEmbree::commit() {
rtcCommitScene(embree_scene);
}
void LightmapRaycasterEmbree::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 LightmapRaycasterEmbree::clear_mesh_filter() {
for (const int &E : filter_meshes) {
rtcEnableGeometry(rtcGetGeometry(embree_scene, E));
}
rtcCommitScene(embree_scene);
filter_meshes.clear();
}
void embree_lm_error_handler(void *p_user_data, RTCError p_code, const char *p_str) {
print_error("Embree error: " + String(p_str));
}
LightmapRaycasterEmbree::LightmapRaycasterEmbree() {
#ifdef __SSE2__
_MM_SET_FLUSH_ZERO_MODE(_MM_FLUSH_ZERO_ON);
_MM_SET_DENORMALS_ZERO_MODE(_MM_DENORMALS_ZERO_ON);
#endif
embree_device = rtcNewDevice(nullptr);<--- Variable 'embree_device' is assigned in constructor body. Consider performing initialization in initialization list. [+]When an object of a class is created, the constructors of all member variables are called consecutively in the order the variables are declared, even if you don't explicitly write them to the initialization list. You could avoid assigning 'embree_device' a value by passing the value to the constructor in the initialization list.
rtcSetDeviceErrorFunction(embree_device, &embree_lm_error_handler, nullptr);
embree_scene = rtcNewScene(embree_device);
}
LightmapRaycasterEmbree::~LightmapRaycasterEmbree() {
if (embree_scene != nullptr) {
rtcReleaseScene(embree_scene);
}
if (embree_device != nullptr) {
rtcReleaseDevice(embree_device);
}
}
#endif // TOOLS_ENABLED
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