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+/*************************************************************************/
+/* lightmapper_rd.h */
+/*************************************************************************/
+/* This file is part of: */
+/* GODOT ENGINE */
+/* https://godotengine.org */
+/*************************************************************************/
+/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
+/* Copyright (c) 2014-2020 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. */
+/*************************************************************************/
+
+#ifndef LIGHTMAPPER_RD_H
+#define LIGHTMAPPER_RD_H
+
+#include "core/local_vector.h"
+#include "scene/3d/lightmapper.h"
+#include "scene/resources/mesh.h"
+#include "servers/rendering/rendering_device.h"
+
+class LightmapperRD : public Lightmapper {
+ GDCLASS(LightmapperRD, Lightmapper)
+
+ struct MeshInstance {
+ MeshData data;
+ int slice = 0;
+ Vector2i offset;
+ };
+
+ struct Light {
+ float position[3];
+ uint32_t type = LIGHT_TYPE_DIRECTIONAL;
+ float direction[3];
+ float energy;
+ float color[3];
+ float size;
+ float range;
+ float attenuation;
+ float spot_angle;
+ float spot_attenuation;
+ uint32_t static_bake;
+ uint32_t pad[3];
+
+ bool operator<(const Light &p_light) const {
+ return type < p_light.type;
+ }
+ };
+
+ struct Vertex {
+ float position[3];
+ float normal_z;
+ float uv[2];
+ float normal_xy[2];
+
+ bool operator==(const Vertex &p_vtx) const {
+ return (position[0] == p_vtx.position[0]) &&
+ (position[1] == p_vtx.position[1]) &&
+ (position[2] == p_vtx.position[2]) &&
+ (uv[0] == p_vtx.uv[0]) &&
+ (uv[1] == p_vtx.uv[1]) &&
+ (normal_xy[0] == p_vtx.normal_xy[0]) &&
+ (normal_xy[1] == p_vtx.normal_xy[1]) &&
+ (normal_z == p_vtx.normal_z);
+ }
+ };
+
+ struct Edge {
+ Vector3 a;
+ Vector3 b;
+ Vector3 na;
+ Vector3 nb;
+ bool operator==(const Edge &p_seam) const {
+ return a == p_seam.a && b == p_seam.b && na == p_seam.na && nb == p_seam.nb;
+ }
+ Edge() {
+ }
+
+ Edge(const Vector3 &p_a, const Vector3 &p_b, const Vector3 &p_na, const Vector3 &p_nb) {
+ a = p_a;
+ b = p_b;
+ na = p_na;
+ nb = p_nb;
+ }
+ };
+
+ struct Probe {
+ float position[4];
+ };
+
+ Vector<Probe> probe_positions;
+
+ struct EdgeHash {
+ _FORCE_INLINE_ static uint32_t hash(const Edge &p_edge) {
+ uint32_t h = hash_djb2_one_float(p_edge.a.x);
+ h = hash_djb2_one_float(p_edge.a.y, h);
+ h = hash_djb2_one_float(p_edge.a.z, h);
+ h = hash_djb2_one_float(p_edge.b.x, h);
+ h = hash_djb2_one_float(p_edge.b.y, h);
+ h = hash_djb2_one_float(p_edge.b.z, h);
+ return h;
+ }
+ };
+ struct EdgeUV2 {
+ Vector2 a;
+ Vector2 b;
+ Vector2i indices;
+ bool operator==(const EdgeUV2 &p_uv2) const {
+ return a == p_uv2.a && b == p_uv2.b;
+ }
+ bool seam_found = false;
+ EdgeUV2(Vector2 p_a, Vector2 p_b, Vector2i p_indices) {
+ a = p_a;
+ b = p_b;
+ indices = p_indices;
+ }
+ EdgeUV2() {}
+ };
+
+ struct Seam {
+ Vector2i a;
+ Vector2i b;
+ uint32_t slice;
+ bool operator<(const Seam &p_seam) const {
+ return slice < p_seam.slice;
+ }
+ };
+
+ struct VertexHash {
+ _FORCE_INLINE_ static uint32_t hash(const Vertex &p_vtx) {
+ uint32_t h = hash_djb2_one_float(p_vtx.position[0]);
+ h = hash_djb2_one_float(p_vtx.position[1], h);
+ h = hash_djb2_one_float(p_vtx.position[2], h);
+ h = hash_djb2_one_float(p_vtx.uv[0], h);
+ h = hash_djb2_one_float(p_vtx.uv[1], h);
+ h = hash_djb2_one_float(p_vtx.normal_xy[0], h);
+ h = hash_djb2_one_float(p_vtx.normal_xy[1], h);
+ h = hash_djb2_one_float(p_vtx.normal_z, h);
+ return h;
+ }
+ };
+
+ struct Box {
+ float min_bounds[3];
+ float pad0;
+ float max_bounds[3];
+ float pad1;
+ };
+
+ struct Triangle {
+ uint32_t indices[3];
+ uint32_t slice;
+ bool operator<(const Triangle &p_triangle) const {
+ return slice < p_triangle.slice;
+ }
+ };
+
+ Vector<MeshInstance> mesh_instances;
+
+ Vector<Light> lights;
+
+ struct TriangleSort {
+ uint32_t cell_index;
+ uint32_t triangle_index;
+ bool operator<(const TriangleSort &p_triangle_sort) const {
+ return cell_index < p_triangle_sort.cell_index; //sorting by triangle index in this case makes no sense
+ }
+ };
+
+ void _plot_triangle_into_triangle_index_list(int p_size, const Vector3i &p_ofs, const AABB &p_bounds, const Vector3 p_points[], uint32_t p_triangle_index, LocalVector<TriangleSort> &triangles, uint32_t p_grid_size);
+
+ struct RasterPushConstant {
+ float atlas_size[2];
+ float uv_offset[2];
+ float to_cell_size[3];
+ uint32_t base_triangle;
+ float to_cell_offset[3];
+ float bias;
+ int32_t grid_size[3];
+ uint32_t pad2;
+ };
+
+ struct RasterSeamsPushConstant {
+ uint32_t base_index;
+ uint32_t slice;
+ float uv_offset[2];
+ uint32_t debug;
+ float blend;
+ uint32_t pad[2];
+ };
+
+ struct PushConstant {
+ int32_t atlas_size[2];
+ uint32_t ray_count;
+ uint32_t ray_to;
+
+ float world_size[3];
+ float bias;
+
+ float to_cell_offset[3];
+ uint32_t ray_from;
+
+ float to_cell_size[3];
+ uint32_t light_count;
+
+ int32_t grid_size;
+ int32_t atlas_slice;
+ int32_t region_ofs[2];
+
+ float environment_xform[12];
+ };
+
+ Vector<Ref<Image>> bake_textures;
+ Vector<Color> probe_values;
+
+ BakeError _blit_meshes_into_atlas(int p_max_texture_size, Vector<Ref<Image>> &albedo_images, Vector<Ref<Image>> &emission_images, AABB &bounds, Size2i &atlas_size, int &atlas_slices, BakeStepFunc p_step_function, void *p_bake_userdata);
+ void _create_acceleration_structures(RenderingDevice *rd, Size2i atlas_size, int atlas_slices, AABB &bounds, int grid_size, Vector<Probe> &probe_positions, GenerateProbes p_generate_probes, Vector<int> &slice_triangle_count, Vector<int> &slice_seam_count, RID &vertex_buffer, RID &triangle_buffer, RID &box_buffer, RID &lights_buffer, RID &triangle_cell_indices_buffer, RID &probe_positions_buffer, RID &grid_texture, RID &grid_texture_sdf, RID &seams_buffer, BakeStepFunc p_step_function, void *p_bake_userdata);
+ void _raster_geometry(RenderingDevice *rd, Size2i atlas_size, int atlas_slices, int grid_size, AABB bounds, float p_bias, Vector<int> slice_triangle_count, RID position_tex, RID unocclude_tex, RID normal_tex, RID raster_depth_buffer, RID rasterize_shader, RID raster_base_uniform);
+
+public:
+ virtual void add_mesh(const MeshData &p_mesh);
+ virtual void add_directional_light(bool p_static, const Vector3 &p_direction, const Color &p_color, float p_energy, float p_angular_distance);
+ virtual void add_omni_light(bool p_static, const Vector3 &p_position, const Color &p_color, float p_energy, float p_range, float p_attenuation, float p_size);
+ virtual void add_spot_light(bool p_static, const Vector3 &p_position, const Vector3 p_direction, const Color &p_color, float p_energy, float p_range, float p_attenuation, float p_spot_angle, float p_spot_attenuation, float p_size);
+ virtual void add_probe(const Vector3 &p_position);
+ virtual BakeError bake(BakeQuality p_quality, bool p_use_denoiser, int p_bounces, float p_bias, int p_max_texture_size, bool p_bake_sh, GenerateProbes p_generate_probes, const Ref<Image> &p_environment_panorama, const Basis &p_environment_transform, BakeStepFunc p_step_function = nullptr, void *p_bake_userdata = nullptr);
+
+ int get_bake_texture_count() const;
+ Ref<Image> get_bake_texture(int p_index) const;
+ int get_bake_mesh_count() const;
+ Variant get_bake_mesh_userdata(int p_index) const;
+ Rect2 get_bake_mesh_uv_scale(int p_index) const;
+ int get_bake_mesh_texture_slice(int p_index) const;
+ int get_bake_probe_count() const;
+ Vector3 get_bake_probe_point(int p_probe) const;
+ Vector<Color> get_bake_probe_sh(int p_probe) const;
+
+ LightmapperRD();
+};
+
+#endif // LIGHTMAPPER_H
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