3 #include "environmentmap.h"
13 EnvironmentMap::EnvironmentMap(unsigned s, PixelFormat f, Renderable &r, Renderable &e):
16 irradiance_shprog(Resources::get_global().get<Program>("_envmap_irradiance.glsl.shader")),
17 specular_shprog(Resources::get_global().get<Program>("_envmap_specular.glsl.shader")),
18 fullscreen_mesh(Resources::get_global().get<Mesh>("_fullscreen_quad.mesh")),
19 sampler(Resources::get_global().get<Sampler>("_linear_clamp.samp")),
20 mip_sampler(Resources::get_global().get<Sampler>("_mip_clamp.samp"))
25 EnvironmentMap::EnvironmentMap(unsigned s, PixelFormat f, unsigned l, Renderable &r, Renderable &e):
28 irradiance_shprog(Resources::get_global().get<Program>("_envmap_irradiance.glsl.shader")),
29 specular_shprog(Resources::get_global().get<Program>("_envmap_specular.glsl.shader")),
30 fullscreen_mesh(Resources::get_global().get<Mesh>("_fullscreen_quad.mesh")),
31 sampler(Resources::get_global().get<Sampler>("_linear_clamp.samp")),
32 mip_sampler(Resources::get_global().get<Sampler>("_mip_clamp.samp"))
37 void EnvironmentMap::init(unsigned s, PixelFormat f, unsigned l)
39 if(!l || (1U<<(l-1))>=s)
40 throw invalid_argument("EnvironmentMap::EnvironmentMap");
47 env_tex.storage(f, size, l);
48 depth_buf.storage(DEPTH_COMPONENT32F, size, size, 1);
49 for(unsigned i=0; i<6; ++i)
51 TextureCubeFace face = TextureCube::enumerate_faces(i);
52 faces[i].fbo.set_format((COLOR_ATTACHMENT,f, DEPTH_ATTACHMENT,DEPTH_COMPONENT32F));
53 faces[i].fbo.attach(COLOR_ATTACHMENT, env_tex, face, 0);
54 faces[i].fbo.attach(DEPTH_ATTACHMENT, depth_buf);
55 faces[i].camera.set_look_direction(TextureCube::get_face_direction(face));
56 faces[i].camera.set_up_direction(TextureCube::get_t_direction(face));
57 faces[i].camera.set_field_of_view(Geometry::Angle<float>::right());
58 faces[i].camera.set_aspect_ratio(1);
59 faces[i].camera.set_depth_clip(0.1, 100);
62 irradiance.storage(f, size/4, 1);
63 irradiance_fbo.set_format((COLOR_ATTACHMENT,f));
64 irradiance_fbo.attach_layered(COLOR_ATTACHMENT, irradiance);
68 specular_fbos.resize(l-1);
69 for(unsigned i=1; i<l; ++i)
71 specular_fbos[i-1].set_format((COLOR_ATTACHMENT,f));
72 specular_fbos[i-1].attach_layered(COLOR_ATTACHMENT, env_tex, i);
75 LinAl::Matrix<float, 3, 3> face_matrices[6];
76 for(unsigned i=0; i<6; ++i)
78 GL::TextureCubeFace face = GL::TextureCube::enumerate_faces(i);
79 GL::Vector3 columns[3];
80 columns[0] = GL::TextureCube::get_s_direction(face);
81 columns[1] = GL::TextureCube::get_t_direction(face);
82 columns[2] = GL::TextureCube::get_face_direction(face);
83 face_matrices[i] = LinAl::Matrix<float, 3, 3>::from_columns(columns);
86 prefilter_shdata.uniform_array("faces", 6, &face_matrices[0]);
87 prefilter_shdata.uniform("n_samples", 128);
88 prefilter_shdata.uniform("roughness", 1.0f);
91 shdata.uniform("env_world_matrix", LinAl::SquareMatrix<float, 3>::identity());
94 void EnvironmentMap::set_depth_clip(float n, float f)
96 for(unsigned i=0; i<6; ++i)
97 faces[i].camera.set_depth_clip(n, f);
100 void EnvironmentMap::set_update_interval(unsigned i)
103 update_delay = min(update_delay, update_interval-1);
106 void EnvironmentMap::queue_update()
111 void EnvironmentMap::setup_frame(Renderer &renderer)
117 renderable.setup_frame(renderer);
125 update_delay = update_interval-1;
126 environment.setup_frame(renderer);
128 const Matrix *matrix = renderable.get_matrix();
132 Renderer::Push push(renderer);
133 Renderer::Exclude exclude1(renderer, renderable);
134 Renderer::Exclude exclude2(renderer, *this);
136 Vector3 center = matrix->column(3).slice<3>(0);
138 for(unsigned i=0; i<6; ++i)
140 faces[i].camera.set_position(center);
141 renderer.set_framebuffer(&faces[i].fbo);
143 renderer.set_camera(faces[i].camera);
144 renderer.render(environment);
147 renderer.set_framebuffer(&irradiance_fbo);
148 renderer.set_shader_program(&irradiance_shprog, &prefilter_shdata);
149 renderer.set_texture("environment_map", &env_tex, &sampler);
150 fullscreen_mesh.draw(renderer);
152 renderer.set_shader_program(&specular_shprog);
153 for(unsigned i=0; i<specular_fbos.size(); ++i)
155 prefilter_shdata.uniform("roughness", 1.0f-sqrt(1.0f-static_cast<float>(i+1)/specular_fbos.size()));
156 renderer.set_framebuffer(&specular_fbos[i]);
157 fullscreen_mesh.draw(renderer);
161 void EnvironmentMap::finish_frame()
166 renderable.finish_frame();
167 environment.finish_frame();
171 void EnvironmentMap::render(Renderer &renderer, Tag tag) const
173 if(!enabled_passes.count(tag))
174 return renderer.render(renderable, tag);
176 Renderer::Push _push_rend(renderer);
178 renderer.set_texture("environment_map", &env_tex, &mip_sampler);
179 renderer.set_texture("irradiance_map", &irradiance, &sampler);
180 renderer.add_shader_data(shdata);
181 renderer.render(renderable, tag);
184 void EnvironmentMap::set_debug_name(const string &name)
187 env_tex.set_debug_name(name+"/environment.texcb");
188 depth_buf.set_debug_name(name+"/environment_depth.rbuf");
189 static const char *face_names[] = { "X+", "X-", "Y+", "Y-", "Z+", "Z-" };
190 for(unsigned i=0; i<6; ++i)
192 faces[i].fbo.set_debug_name(format("%s [FBO:%s]", name, face_names[i]));
193 faces[i].camera.set_debug_name(format("%s/%s.camera", name, face_names[i]));
196 irradiance.set_debug_name(name+"/irradiance.texcb");
197 irradiance_fbo.set_debug_name(name+" [FBO:irradiance]");
198 for(unsigned i=0; i<specular_fbos.size(); ++i)
199 specular_fbos[i].set_debug_name(format("%s [FBO:specular_mip%d]", name, i+1));
200 prefilter_shdata.set_debug_name(name+" [UBO:prefilter]");
201 shdata.set_debug_name(name+" [UBO]");