197 lines
7.4 KiB
C++
197 lines
7.4 KiB
C++
/*************************************************************************/
|
|
/* lightmap_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 "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;
|
|
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) {
|
|
RTCIntersectContext context;
|
|
|
|
rtcInitIntersectContext(&context);
|
|
|
|
rtcIntersect1(embree_scene, &context, (RTCRayHit *)&r_ray);
|
|
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);
|
|
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
|