-string PbrMaterial::create_program_source() const
-{
- string source = "import cooktorrance;\n";
- if(base_color.texture)
- source += "const bool use_base_color_map = true;\n";
- if(normal.texture)
- source += "const bool use_normal_map = true;\n";
- if(metalness.texture)
- source += "const bool use_metalness_map = true;\n";
- if(roughness.texture)
- source += "const bool use_roughness_map = true;\n";
- if(occlusion.texture)
- source += "const bool use_occlusion_map = true;\n";
- if(emission.texture || emission.value.r || emission.value.g || emission.value.b)
- {
- source += "const bool use_emission = true;\n";
- if(emission.texture)
- source += "const bool use_emission_map = true;\n";
- }
- if(receive_shadows)
- source += "const bool use_shadow_map = true;\n";
- return source;
-}
-
-void PbrMaterial::attach_textures_to(Texturing &texturing, ProgramData &tex_shdata) const
-{
- attach_texture_to(base_color.texture, texturing, tex_shdata, "base_color_map");
- attach_texture_to(metalness.texture, texturing, tex_shdata, "metalness_map");
- attach_texture_to(roughness.texture, texturing, tex_shdata, "roughness_map");
- attach_texture_to(normal.texture, texturing, tex_shdata, "normal_map");
- attach_texture_to(occlusion.texture, texturing, tex_shdata, "occlusion_map");
- attach_texture_to(emission.texture, texturing, tex_shdata, "emission_map");
+const Texture2D &PbrMaterial::get_or_create_fresnel_lookup()
+{
+ Resources &resources = Resources::get_global();
+
+ static const string name = "_pbr_fresnel_lookup.tex";
+ Texture2D *fresnel_lookup = resources.find<Texture2D>(name);
+ if(fresnel_lookup)
+ return *fresnel_lookup;
+
+ fresnel_lookup = new Texture2D;
+ fresnel_lookup->storage(RG8, 128, 128, 1);
+ resources.add(name, fresnel_lookup);
+
+ const Program &shprog = resources.get<Program>("_pbr_fresnel_lookup.glsl.shader");
+ ProgramData shdata;
+ shdata.uniform("n_samples", 1024);
+ // Not actually used here, but put it in to satisfy the interface
+ shdata.uniform("roughness", 0.0f);
+
+ const Mesh &mesh = resources.get<Mesh>("_fullscreen_quad.mesh");
+ Framebuffer fresnel_lookup_fbo((COLOR_ATTACHMENT,RG8));
+ fresnel_lookup_fbo.attach(COLOR_ATTACHMENT, *fresnel_lookup);
+ Renderer renderer;
+ renderer.set_framebuffer(&fresnel_lookup_fbo);
+ renderer.set_shader_program(&shprog, &shdata);
+ mesh.draw(renderer);
+
+ return *fresnel_lookup;
+}
+
+void PbrMaterial::fill_program_info(string &module_name, map<string, int> &spec_values) const
+{
+ module_name = "cooktorrance.glsl";
+ spec_values["use_base_color_map"] = (base_color.texture!=0);
+ spec_values["use_normal_map"] = (normal.texture!=0);
+ spec_values["use_metalness_map"] = (metalness.texture!=0);
+ spec_values["use_roughness_map"] = (roughness.texture!=0);
+ spec_values["use_occlusion_map"] = (occlusion.texture!=0);
+ bool use_emission = (emission.texture || emission.value.r || emission.value.g || emission.value.b);
+ spec_values["use_emission"] = use_emission;
+ spec_values["use_emission_map"] = (emission.texture!=0);
+}
+
+const Texture *PbrMaterial::get_texture(Tag tag) const
+{
+ if(tag==texture_tags[0])
+ return base_color.texture;
+ else if(tag==texture_tags[1])
+ return normal.texture;
+ else if(tag==texture_tags[2])
+ return metalness.texture;
+ else if(tag==texture_tags[3])
+ return roughness.texture;
+ else if(tag==texture_tags[4])
+ return occlusion.texture;
+ else if(tag==texture_tags[5])
+ return emission.texture;
+ else if(tag==texture_tags[6])
+ return &fresnel_lookup;
+ else
+ return 0;
+}
+
+const Sampler *PbrMaterial::get_sampler(Tag tag) const
+{
+ if(tag==texture_tags[6])
+ return &fresnel_sampler;
+ else
+ return sampler;