💿🐜 Antkeeper source code
https://antkeeper.com
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1236 lines
43 KiB
1236 lines
43 KiB
/*
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* Copyright (C) 2023 Christopher J. Howard
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*
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* This file is part of Antkeeper source code.
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*
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* Antkeeper source code is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Antkeeper source code is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <engine/render/passes/sky-pass.hpp>
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#include <engine/resources/resource-manager.hpp>
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#include <engine/gl/rasterizer.hpp>
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#include <engine/gl/framebuffer.hpp>
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#include <engine/gl/shader-program.hpp>
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#include <engine/gl/shader-variable.hpp>
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#include <engine/gl/vertex-buffer.hpp>
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#include <engine/gl/vertex-array.hpp>
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#include <engine/gl/vertex-attribute.hpp>
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#include <engine/gl/drawing-mode.hpp>
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#include <engine/gl/texture-2d.hpp>
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#include <engine/gl/texture-wrapping.hpp>
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#include <engine/gl/texture-filter.hpp>
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#include <engine/render/vertex-attribute.hpp>
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#include <engine/render/context.hpp>
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#include <engine/render/model.hpp>
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#include <engine/render/material.hpp>
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#include <engine/scene/camera.hpp>
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#include <engine/utility/fundamental-types.hpp>
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#include <engine/color/color.hpp>
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#include <engine/math/interpolation.hpp>
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#include <engine/geom/cartesian.hpp>
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#include <engine/geom/spherical.hpp>
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#include <engine/physics/orbit/orbit.hpp>
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#include <engine/physics/light/photometry.hpp>
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#include <bit>
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#include <cmath>
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#include <stdexcept>
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#include <glad/glad.h>
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namespace render {
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sky_pass::sky_pass(gl::rasterizer* rasterizer, const gl::framebuffer* framebuffer, resource_manager* resource_manager):
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pass(rasterizer, framebuffer),
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mouse_position({0.0f, 0.0f}),
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sky_model(nullptr),
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sky_material(nullptr),
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sky_model_vao(nullptr),
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moon_model(nullptr),
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moon_model_vao(nullptr),
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moon_material(nullptr),
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moon_shader_program(nullptr),
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stars_model(nullptr),
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stars_model_vao(nullptr),
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star_material(nullptr),
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star_shader_program(nullptr),
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observer_position_tween({0, 0, 0}, math::lerp<float3, float>),
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sun_position_tween(float3{1.0f, 0.0f, 0.0f}, math::lerp<float3, float>),
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sun_luminance_tween(float3{0.0f, 0.0f, 0.0f}, math::lerp<float3, float>),
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sun_illuminance_tween(float3{0.0f, 0.0f, 0.0f}, math::lerp<float3, float>),
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icrf_to_eus_translation({0, 0, 0}, math::lerp<float3, float>),
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icrf_to_eus_rotation(math::quaternion<float>::identity(), math::nlerp<float>),
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moon_position_tween(float3{0, 0, 0}, math::lerp<float3, float>),
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moon_rotation_tween(math::quaternion<float>::identity(), math::nlerp<float>),
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moon_angular_radius_tween(0.0f, math::lerp<float, float>),
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moon_sunlight_direction_tween(float3{0, 0, 0}, math::lerp<float3, float>),
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moon_sunlight_illuminance_tween(float3{0, 0, 0}, math::lerp<float3, float>),
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moon_planetlight_direction_tween(float3{0, 0, 0}, math::lerp<float3, float>),
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moon_planetlight_illuminance_tween(float3{0, 0, 0}, math::lerp<float3, float>),
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moon_illuminance_tween(float3{0.0f, 0.0f, 0.0f}, math::lerp<float3, float>),
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magnification(1.0f)
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{
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// Build quad VBO and VAO
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const float2 vertex_positions[] =
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{
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{-1.0f, 1.0f},
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{-1.0f, -1.0f},
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{ 1.0f, 1.0f},
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{ 1.0f, -1.0f}
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};
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const auto vertex_data = std::as_bytes(std::span{vertex_positions});
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std::size_t vertex_size = 2;
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std::size_t vertex_stride = sizeof(float) * vertex_size;
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quad_vbo = std::make_unique<gl::vertex_buffer>(gl::buffer_usage::static_draw, vertex_data.size(), vertex_data);
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quad_vao = std::make_unique<gl::vertex_array>();
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// Define position vertex attribute
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gl::vertex_attribute position_attribute;
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position_attribute.buffer = quad_vbo.get();
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position_attribute.offset = 0;
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position_attribute.stride = vertex_stride;
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position_attribute.type = gl::vertex_attribute_type::float_32;
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position_attribute.components = 2;
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// Bind vertex attributes to VAO
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quad_vao->bind(render::vertex_attribute::position, position_attribute);
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// Transmittance LUT
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{
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// Construct transmittance LUT texture
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m_transmittance_lut_texture = std::make_unique<gl::texture_2d>(m_transmittance_lut_resolution.x(), m_transmittance_lut_resolution.y(), gl::pixel_type::float_32, gl::pixel_format::rgb);
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m_transmittance_lut_texture->set_wrapping(gl::texture_wrapping::extend, gl::texture_wrapping::extend);
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m_transmittance_lut_texture->set_filters(gl::texture_min_filter::linear, gl::texture_mag_filter::linear);
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m_transmittance_lut_texture->set_max_anisotropy(0.0f);
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// Construct transmittance LUT framebuffer and attach texture
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m_transmittance_lut_framebuffer = std::make_unique<gl::framebuffer>(m_transmittance_lut_resolution.x(), m_transmittance_lut_resolution.y());
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m_transmittance_lut_framebuffer->attach(gl::framebuffer_attachment_type::color, m_transmittance_lut_texture.get());
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// Load transmittance LUT shader template
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m_transmittance_lut_shader_template = resource_manager->load<gl::shader_template>("sky-transmittance-lut.glsl");
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// Build transmittance LUT shader program
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rebuild_transmittance_lut_shader_program();
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// Build transmittance LUT command buffer
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rebuild_transmittance_lut_command_buffer();
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}
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// Multiscattering LUT
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{
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// Construct multiscattering LUT texture
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m_multiscattering_lut_texture = std::make_unique<gl::texture_2d>(m_multiscattering_lut_resolution.x(), m_multiscattering_lut_resolution.y(), gl::pixel_type::float_32, gl::pixel_format::rgb);
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m_multiscattering_lut_texture->set_wrapping(gl::texture_wrapping::extend, gl::texture_wrapping::extend);
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m_multiscattering_lut_texture->set_filters(gl::texture_min_filter::linear, gl::texture_mag_filter::linear);
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m_multiscattering_lut_texture->set_max_anisotropy(0.0f);
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// Construct multiscattering LUT framebuffer and attach texture
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m_multiscattering_lut_framebuffer = std::make_unique<gl::framebuffer>(m_multiscattering_lut_resolution.x(), m_multiscattering_lut_resolution.y());
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m_multiscattering_lut_framebuffer->attach(gl::framebuffer_attachment_type::color, m_multiscattering_lut_texture.get());
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// Load multiscattering LUT shader template
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m_multiscattering_lut_shader_template = resource_manager->load<gl::shader_template>("sky-multiscattering-lut.glsl");
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// Build multiscattering LUT shader program
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rebuild_multiscattering_lut_shader_program();
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// Build multiscattering LUT command buffer
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rebuild_multiscattering_lut_command_buffer();
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}
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// Luminance LUT
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{
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// Construct luminance LUT texture
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m_luminance_lut_texture = std::make_unique<gl::texture_2d>(m_luminance_lut_resolution.x(), m_luminance_lut_resolution.y(), gl::pixel_type::float_32, gl::pixel_format::rgb);
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m_luminance_lut_texture->set_wrapping(gl::texture_wrapping::extend, gl::texture_wrapping::extend);
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m_luminance_lut_texture->set_filters(gl::texture_min_filter::linear, gl::texture_mag_filter::linear);
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m_luminance_lut_texture->set_max_anisotropy(0.0f);
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// Construct luminance LUT framebuffer and attach texture
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m_luminance_lut_framebuffer = std::make_unique<gl::framebuffer>(m_luminance_lut_resolution.x(), m_luminance_lut_resolution.y());
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m_luminance_lut_framebuffer->attach(gl::framebuffer_attachment_type::color, m_luminance_lut_texture.get());
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// Load luminance LUT shader template
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m_luminance_lut_shader_template = resource_manager->load<gl::shader_template>("sky-luminance-lut.glsl");
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// Build luminance LUT shader program
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rebuild_luminance_lut_shader_program();
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// Build luminance LUT command buffer
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rebuild_luminance_lut_command_buffer();
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}
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// Load sky probe shader template
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m_sky_probe_shader_template = resource_manager->load<gl::shader_template>("sky-probe.glsl");
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// Build sky probe shader program
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m_sky_probe_shader_program = m_sky_probe_shader_template->build({});
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if (!m_sky_probe_shader_program->linked())
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{
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debug::log::error("Failed to build sky probe shader program: {}", m_sky_probe_shader_program->info());
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debug::log::warning("{}", m_sky_probe_shader_template->configure(gl::shader_stage::vertex));
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}
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// Load cubemap downsample shader template
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m_cubemap_downsample_shader_template = resource_manager->load<gl::shader_template>("cubemap-downsample.glsl");
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// Build cubemap downsample shader program
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m_cubemap_downsample_shader_program = m_cubemap_downsample_shader_template->build({});
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if (!m_cubemap_downsample_shader_program->linked())
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{
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debug::log::error("Failed to build cubemap downsample shader program: {}", m_cubemap_downsample_shader_program->info());
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debug::log::warning("{}", m_cubemap_downsample_shader_template->configure(gl::shader_stage::vertex));
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}
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// Load moon textures
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m_moon_albedo_map = resource_manager->load<gl::texture_2d>("moon-albedo.tex");
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m_moon_normal_map = resource_manager->load<gl::texture_2d>("moon-normal.tex");
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}
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void sky_pass::render(render::context& ctx)
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{
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glDisable(GL_BLEND);
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glDisable(GL_DEPTH_TEST);
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glDepthMask(GL_FALSE);
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glEnable(GL_CULL_FACE);
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glCullFace(GL_BACK);
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// Render transmittance LUT (if parameters have changed)
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if (m_render_transmittance_lut)
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{
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for (const auto& command: m_transmittance_lut_command_buffer)
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{
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command();
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}
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m_render_transmittance_lut = false;
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}
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// Render multiscattering LUT (if parameters have changed)
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if (m_render_multiscattering_lut)
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{
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for (const auto& command: m_multiscattering_lut_command_buffer)
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{
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command();
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}
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m_render_multiscattering_lut = false;
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}
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// Construct matrices
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const scene::camera& camera = *ctx.camera;
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float3 model_scale = float3{1.0f, 1.0f, 1.0f} * (camera.get_clip_near() + camera.get_clip_far()) * 0.5f;
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float4x4 model = math::scale(math::matrix4<float>::identity(), model_scale);
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float4x4 view = float4x4(float3x3(camera.get_view()));
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float4x4 model_view = view * model;
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const float4x4& projection = camera.get_projection();
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float4x4 view_projection = projection * view;
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float4x4 model_view_projection = projection * model_view;
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camera_exposure = camera.get_exposure_normalization();
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// Interpolate observer position
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observer_position = observer_position_tween.interpolate(ctx.alpha);
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// Construct tweened ICRF to EUS transformation
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math::transformation::se3<float> icrf_to_eus =
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{
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icrf_to_eus_translation.interpolate(ctx.alpha),
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icrf_to_eus_rotation.interpolate(ctx.alpha)
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};
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// Get EUS direction to sun
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float3 sun_position = sun_position_tween.interpolate(ctx.alpha);
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float3 sun_direction = math::normalize(sun_position);
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// Interpolate and expose sun luminance and illuminance
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float3 sun_illuminance = sun_illuminance_tween.interpolate(ctx.alpha) * camera_exposure;
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float3 sun_luminance = sun_luminance_tween.interpolate(ctx.alpha) * camera_exposure;
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float3 moon_position = moon_position_tween.interpolate(ctx.alpha);
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float3 moon_direction = math::normalize(moon_position);
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float3 moon_illuminance = moon_illuminance_tween.interpolate(ctx.alpha) * camera_exposure;
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float moon_angular_radius = moon_angular_radius_tween.interpolate(ctx.alpha) * magnification;
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float sun_y = color::aces::ap1<float>.luminance(sun_transmitted_illuminance);
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float moon_y = color::aces::ap1<float>.luminance(moon_transmitted_illuminance);
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// if (math::max(sun_illuminance) > math::max(moon_illuminance))
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// {
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dominant_light_direction = sun_direction;
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dominant_light_illuminance = sun_illuminance;
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// }
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// else
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// {
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// dominant_light_direction = moon_direction;
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// dominant_light_illuminance = moon_illuminance;
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// }
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// Render luminance LUT
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// if (m_render_luminance_lut)
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{
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for (const auto& command: m_luminance_lut_command_buffer)
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{
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command();
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}
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}
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// Render sky probe
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for (const auto& command: m_sky_probe_command_buffer)
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{
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command();
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}
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rasterizer->use_framebuffer(*framebuffer);
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auto viewport = framebuffer->get_dimensions();
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rasterizer->set_viewport(0, 0, std::get<0>(viewport), std::get<1>(viewport));
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float2 resolution = {static_cast<float>(std::get<0>(viewport)), static_cast<float>(std::get<1>(viewport))};
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// Draw atmosphere
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if (sky_model && sky_shader_program)
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{
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rasterizer->use_program(*sky_shader_program);
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// Upload shader parameters
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if (model_view_projection_var)
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model_view_projection_var->update(model_view_projection);
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if (mouse_var)
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mouse_var->update(mouse_position);
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if (resolution_var)
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resolution_var->update(resolution);
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if (light_direction_var)
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light_direction_var->update(dominant_light_direction);
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if (sun_luminance_var)
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sun_luminance_var->update(sun_luminance);
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if (sun_angular_radius_var)
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sun_angular_radius_var->update(sun_angular_radius * magnification);
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if (atmosphere_radii_var)
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atmosphere_radii_var->update(atmosphere_radii);
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if (observer_position_var)
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observer_position_var->update(observer_position);
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if (sky_transmittance_lut_var)
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sky_transmittance_lut_var->update(*m_transmittance_lut_texture);
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if (sky_transmittance_lut_resolution_var)
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sky_transmittance_lut_resolution_var->update(math::vector2<float>(m_transmittance_lut_resolution));
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if (sky_luminance_lut_var)
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sky_luminance_lut_var->update(*m_luminance_lut_texture);
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if (sky_luminance_lut_resolution_var)
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sky_luminance_lut_resolution_var->update(math::vector2<float>(m_luminance_lut_resolution));
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//sky_material->update(ctx.alpha);
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rasterizer->draw_arrays(*sky_model_vao, sky_model_drawing_mode, sky_model_start_index, sky_model_index_count);
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}
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glEnable(GL_BLEND);
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// glBlendFunc(GL_SRC_ALPHA, GL_ONE);
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glBlendFunc(GL_ONE, GL_ONE);
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// Flag moon pixels in stencil buffer
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glEnable(GL_STENCIL_TEST);
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glStencilMask(0xff);
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glStencilFunc(GL_ALWAYS, 1, 0xff);
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glStencilOp(GL_KEEP, GL_KEEP, GL_REPLACE);
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// Draw moon model
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//if (moon_position.y() >= -moon_angular_radius)
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if (moon_shader_program)
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{
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float moon_distance = (camera.get_clip_near() + camera.get_clip_far()) * 0.5f;
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float moon_radius = moon_angular_radius * moon_distance;
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math::transform<float> moon_transform;
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moon_transform.translation = math::normalize(moon_position) * moon_distance;
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moon_transform.rotation = moon_rotation_tween.interpolate(ctx.alpha);
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moon_transform.scale = {moon_radius, moon_radius, moon_radius};
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model = moon_transform.matrix();
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float3x3 normal_model = math::transpose(math::inverse(float3x3(model)));
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rasterizer->use_program(*moon_shader_program);
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if (moon_model_var)
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moon_model_var->update(model);
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if (moon_view_projection_var)
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moon_view_projection_var->update(view_projection);
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if (moon_normal_model_var)
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moon_normal_model_var->update(normal_model);
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if (moon_camera_position_var)
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moon_camera_position_var->update(camera.get_translation());
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if (moon_sunlight_direction_var)
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moon_sunlight_direction_var->update(math::normalize(moon_sunlight_direction_tween.interpolate(ctx.alpha)));
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if (moon_sunlight_illuminance_var)
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moon_sunlight_illuminance_var->update(moon_sunlight_illuminance_tween.interpolate(ctx.alpha) * camera_exposure);
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if (moon_planetlight_direction_var)
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moon_planetlight_direction_var->update(math::normalize(moon_planetlight_direction_tween.interpolate(ctx.alpha)));
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if (moon_planetlight_illuminance_var)
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moon_planetlight_illuminance_var->update(moon_planetlight_illuminance_tween.interpolate(ctx.alpha) * camera_exposure);
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if (moon_albedo_map_var && m_moon_albedo_map)
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moon_albedo_map_var->update(*m_moon_albedo_map);
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if (moon_normal_map_var && m_moon_normal_map)
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moon_normal_map_var->update(*m_moon_normal_map);
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if (moon_observer_position_var)
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moon_observer_position_var->update(observer_position);
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if (moon_sky_transmittance_lut_var)
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moon_sky_transmittance_lut_var->update(*m_transmittance_lut_texture);
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if (moon_atmosphere_radii_var)
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moon_atmosphere_radii_var->update(atmosphere_radii);
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//moon_material->update(ctx.alpha);
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rasterizer->draw_arrays(*moon_model_vao, moon_model_drawing_mode, moon_model_start_index, moon_model_index_count);
|
|
}
|
|
|
|
// Prevent stars from being drawn in front of the moon
|
|
glStencilMask(0x00);
|
|
glStencilFunc(GL_NOTEQUAL, 1, 0xff);
|
|
|
|
// Draw stars
|
|
if (star_shader_program)
|
|
{
|
|
float star_distance = (camera.get_clip_near() + camera.get_clip_far()) * 0.5f;
|
|
|
|
model = float4x4(float3x3(icrf_to_eus.r));
|
|
model = math::scale(model, {star_distance, star_distance, star_distance});
|
|
|
|
model_view_projection = view_projection * model;
|
|
|
|
rasterizer->use_program(*star_shader_program);
|
|
if (star_model_view_projection_var)
|
|
star_model_view_projection_var->update(model_view_projection);
|
|
if (star_distance_var)
|
|
star_distance_var->update(star_distance);
|
|
if (star_exposure_var)
|
|
star_exposure_var->update(camera_exposure);
|
|
if (star_inv_resolution_var)
|
|
star_inv_resolution_var->update(1.0f / resolution);
|
|
|
|
//star_material->update(ctx.alpha);
|
|
|
|
rasterizer->draw_arrays(*stars_model_vao, stars_model_drawing_mode, stars_model_start_index, stars_model_index_count);
|
|
}
|
|
|
|
glDisable(GL_STENCIL_TEST);
|
|
}
|
|
|
|
void sky_pass::set_transmittance_lut_sample_count(std::uint16_t count)
|
|
{
|
|
if (m_transmittance_lut_sample_count != count)
|
|
{
|
|
m_transmittance_lut_sample_count = count;
|
|
|
|
// Rebuild transmittance LUT shader program and command buffer
|
|
rebuild_transmittance_lut_shader_program();
|
|
rebuild_transmittance_lut_command_buffer();
|
|
|
|
// Trigger rendering of transmittance LUT
|
|
m_render_transmittance_lut = true;
|
|
}
|
|
}
|
|
|
|
void sky_pass::set_transmittance_lut_resolution(const math::vector2<std::uint16_t>& resolution)
|
|
{
|
|
if (m_transmittance_lut_resolution.x() != resolution.x() || m_transmittance_lut_resolution.y() != resolution.y())
|
|
{
|
|
m_transmittance_lut_resolution = resolution;
|
|
m_transmittance_lut_texture->resize(resolution.x(), resolution.y(), nullptr);
|
|
m_transmittance_lut_framebuffer->resize({resolution.x(), resolution.y()});
|
|
|
|
// Trigger rendering of transmittance LUT
|
|
m_render_transmittance_lut = true;
|
|
}
|
|
}
|
|
|
|
void sky_pass::set_multiscattering_lut_direction_sample_count(std::uint16_t count)
|
|
{
|
|
if (m_multiscattering_lut_direction_sample_count != count)
|
|
{
|
|
m_multiscattering_lut_direction_sample_count = count;
|
|
|
|
// Rebuild multiscattering LUT shader program and command buffer
|
|
rebuild_multiscattering_lut_shader_program();
|
|
rebuild_multiscattering_lut_command_buffer();
|
|
|
|
// Trigger rendering of multiscattering LUT
|
|
m_render_multiscattering_lut = true;
|
|
}
|
|
}
|
|
|
|
void sky_pass::set_multiscattering_lut_scatter_sample_count(std::uint16_t count)
|
|
{
|
|
if (m_multiscattering_lut_scatter_sample_count != count)
|
|
{
|
|
m_multiscattering_lut_scatter_sample_count = count;
|
|
|
|
// Rebuild multiscattering LUT shader program and command buffer
|
|
rebuild_multiscattering_lut_shader_program();
|
|
rebuild_multiscattering_lut_command_buffer();
|
|
|
|
// Trigger rendering of multiscattering LUT
|
|
m_render_multiscattering_lut = true;
|
|
}
|
|
}
|
|
|
|
void sky_pass::set_multiscattering_lut_resolution(const math::vector2<std::uint16_t>& resolution)
|
|
{
|
|
if (m_multiscattering_lut_resolution.x() != resolution.x() || m_multiscattering_lut_resolution.y() != resolution.y())
|
|
{
|
|
m_multiscattering_lut_resolution = resolution;
|
|
m_multiscattering_lut_texture->resize(resolution.x(), resolution.y(), nullptr);
|
|
m_multiscattering_lut_framebuffer->resize({resolution.x(), resolution.y()});
|
|
|
|
// Trigger rendering of multiscattering LUT
|
|
m_render_multiscattering_lut = true;
|
|
}
|
|
}
|
|
|
|
void sky_pass::set_luminance_lut_sample_count(std::uint16_t count)
|
|
{
|
|
if (m_luminance_lut_sample_count != count)
|
|
{
|
|
m_luminance_lut_sample_count = count;
|
|
|
|
// Rebuild luminance LUT shader program and command buffer
|
|
rebuild_luminance_lut_shader_program();
|
|
rebuild_luminance_lut_command_buffer();
|
|
|
|
// Trigger rendering of luminance LUT
|
|
m_render_luminance_lut = true;
|
|
}
|
|
}
|
|
|
|
void sky_pass::set_luminance_lut_resolution(const math::vector2<std::uint16_t>& resolution)
|
|
{
|
|
if (m_luminance_lut_resolution.x() != resolution.x() || m_luminance_lut_resolution.y() != resolution.y())
|
|
{
|
|
m_luminance_lut_resolution = resolution;
|
|
m_luminance_lut_texture->resize(resolution.x(), resolution.y(), nullptr);
|
|
m_luminance_lut_framebuffer->resize({resolution.x(), resolution.y()});
|
|
|
|
// Trigger rendering of luminance LUT
|
|
m_render_luminance_lut = true;
|
|
}
|
|
}
|
|
|
|
void sky_pass::set_sky_model(std::shared_ptr<render::model> model)
|
|
{
|
|
sky_model = model;
|
|
sky_shader_program = nullptr;
|
|
|
|
if (sky_model)
|
|
{
|
|
sky_model_vao = model->get_vertex_array().get();
|
|
|
|
for (const auto& group: model->get_groups())
|
|
{
|
|
sky_material = group.material.get();
|
|
sky_model_drawing_mode = group.drawing_mode;
|
|
sky_model_start_index = group.start_index;
|
|
sky_model_index_count = group.index_count;
|
|
}
|
|
|
|
if (sky_material)
|
|
{
|
|
sky_shader_program = sky_material->get_shader_template()->build();
|
|
|
|
if (sky_shader_program->linked())
|
|
{
|
|
model_view_projection_var = sky_shader_program->variable("model_view_projection");
|
|
mouse_var = sky_shader_program->variable("mouse");
|
|
resolution_var = sky_shader_program->variable("resolution");
|
|
light_direction_var = sky_shader_program->variable("light_direction");
|
|
sun_luminance_var = sky_shader_program->variable("sun_luminance");
|
|
sun_angular_radius_var = sky_shader_program->variable("sun_angular_radius");
|
|
atmosphere_radii_var = sky_shader_program->variable("atmosphere_radii");
|
|
observer_position_var = sky_shader_program->variable("observer_position");
|
|
sky_transmittance_lut_var = sky_shader_program->variable("sky_transmittance_lut");
|
|
sky_transmittance_lut_resolution_var = sky_shader_program->variable("sky_transmittance_lut_resolution");
|
|
sky_luminance_lut_var = sky_shader_program->variable("sky_luminance_lut");
|
|
sky_luminance_lut_resolution_var = sky_shader_program->variable("sky_luminance_lut_resolution");
|
|
}
|
|
else
|
|
{
|
|
debug::log::error("Failed to build sky shader program: {}", sky_shader_program->info());
|
|
debug::log::warning("{}", sky_material->get_shader_template()->configure(gl::shader_stage::vertex));
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
sky_model_vao = nullptr;
|
|
}
|
|
}
|
|
|
|
void sky_pass::set_moon_model(std::shared_ptr<render::model> model)
|
|
{
|
|
moon_model = model;
|
|
moon_shader_program = nullptr;
|
|
|
|
if (moon_model)
|
|
{
|
|
moon_model_vao = model->get_vertex_array().get();
|
|
|
|
for (const auto& group: model->get_groups())
|
|
{
|
|
moon_material = group.material.get();
|
|
moon_model_drawing_mode = group.drawing_mode;
|
|
moon_model_start_index = group.start_index;
|
|
moon_model_index_count = group.index_count;
|
|
}
|
|
|
|
if (moon_material)
|
|
{
|
|
moon_shader_program = moon_material->get_shader_template()->build();
|
|
|
|
if (moon_shader_program->linked())
|
|
{
|
|
moon_model_var = moon_shader_program->variable("model");
|
|
moon_view_projection_var = moon_shader_program->variable("view_projection");
|
|
moon_normal_model_var = moon_shader_program->variable("normal_model");
|
|
moon_camera_position_var = moon_shader_program->variable("camera_position");
|
|
moon_sunlight_direction_var = moon_shader_program->variable("sunlight_direction");
|
|
moon_sunlight_illuminance_var = moon_shader_program->variable("sunlight_illuminance");
|
|
moon_planetlight_direction_var = moon_shader_program->variable("planetlight_direction");
|
|
moon_planetlight_illuminance_var = moon_shader_program->variable("planetlight_illuminance");
|
|
moon_albedo_map_var = moon_shader_program->variable("albedo_map");
|
|
moon_normal_map_var = moon_shader_program->variable("normal_map");
|
|
moon_observer_position_var = moon_shader_program->variable("observer_position");
|
|
moon_sky_transmittance_lut_var = moon_shader_program->variable("sky_transmittance_lut");
|
|
moon_atmosphere_radii_var = moon_shader_program->variable("atmosphere_radii");
|
|
}
|
|
else
|
|
{
|
|
debug::log::error("Failed to build moon shader program: {}", moon_shader_program->info());
|
|
debug::log::warning("{}", moon_material->get_shader_template()->configure(gl::shader_stage::vertex));
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
moon_model = nullptr;
|
|
}
|
|
}
|
|
|
|
void sky_pass::set_stars_model(std::shared_ptr<render::model> model)
|
|
{
|
|
stars_model = model;
|
|
star_shader_program = nullptr;
|
|
|
|
if (stars_model)
|
|
{
|
|
stars_model_vao = model->get_vertex_array().get();
|
|
|
|
for (const auto& group: model->get_groups())
|
|
{
|
|
stars_model_drawing_mode = group.drawing_mode;
|
|
stars_model_start_index = group.start_index;
|
|
stars_model_index_count = group.index_count;
|
|
star_material = group.material.get();
|
|
}
|
|
|
|
if (star_material)
|
|
{
|
|
star_shader_program = star_material->get_shader_template()->build();
|
|
|
|
if (star_shader_program->linked())
|
|
{
|
|
star_model_view_projection_var = star_shader_program->variable("model_view_projection");
|
|
star_distance_var = star_shader_program->variable("star_distance");
|
|
star_exposure_var = star_shader_program->variable("camera_exposure");
|
|
star_inv_resolution_var = star_shader_program->variable("inv_resolution");
|
|
}
|
|
else
|
|
{
|
|
debug::log::error("Failed to build star shader program: {}", star_shader_program->info());
|
|
debug::log::warning("{}", star_material->get_shader_template()->configure(gl::shader_stage::vertex));
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
stars_model = nullptr;
|
|
}
|
|
}
|
|
|
|
void sky_pass::update_tweens()
|
|
{
|
|
observer_position_tween.update();
|
|
sun_position_tween.update();
|
|
sun_luminance_tween.update();
|
|
sun_illuminance_tween.update();
|
|
icrf_to_eus_translation.update();
|
|
icrf_to_eus_rotation.update();
|
|
|
|
moon_position_tween.update();
|
|
moon_rotation_tween.update();
|
|
moon_angular_radius_tween.update();
|
|
moon_sunlight_direction_tween.update();
|
|
moon_sunlight_illuminance_tween.update();
|
|
moon_planetlight_direction_tween.update();
|
|
moon_planetlight_illuminance_tween.update();
|
|
moon_illuminance_tween.update();
|
|
}
|
|
|
|
void sky_pass::set_magnification(float magnification)
|
|
{
|
|
this->magnification = magnification;
|
|
}
|
|
|
|
void sky_pass::set_icrf_to_eus(const math::transformation::se3<float>& transformation)
|
|
{
|
|
icrf_to_eus_translation[1] = transformation.t;
|
|
icrf_to_eus_rotation[1] = transformation.r;
|
|
}
|
|
|
|
void sky_pass::set_sun_position(const float3& position)
|
|
{
|
|
sun_position_tween[1] = position;
|
|
}
|
|
|
|
void sky_pass::set_sun_illuminance(const float3& illuminance, const float3& transmitted_illuminance)
|
|
{
|
|
sun_illuminance_tween[1] = illuminance;
|
|
sun_transmitted_illuminance = transmitted_illuminance;
|
|
}
|
|
|
|
void sky_pass::set_sun_luminance(const float3& luminance)
|
|
{
|
|
sun_luminance_tween[1] = luminance;
|
|
}
|
|
|
|
void sky_pass::set_sun_angular_radius(float radius)
|
|
{
|
|
sun_angular_radius = radius;
|
|
}
|
|
|
|
void sky_pass::set_planet_radius(float radius)
|
|
{
|
|
atmosphere_radii[0] = radius;
|
|
atmosphere_radii[1] = atmosphere_radii[0] + atmosphere_upper_limit;
|
|
atmosphere_radii[2] = atmosphere_radii[0] * atmosphere_radii[0];
|
|
atmosphere_radii[3] = atmosphere_radii[1] * atmosphere_radii[1];
|
|
|
|
observer_position_tween[1] = {0.0f, atmosphere_radii.x() + observer_elevation, 0.0f};
|
|
|
|
// Trigger transmittance and multiscattering LUT render
|
|
m_render_transmittance_lut = true;
|
|
m_render_multiscattering_lut = true;
|
|
}
|
|
|
|
void sky_pass::set_atmosphere_upper_limit(float limit)
|
|
{
|
|
atmosphere_upper_limit = limit;
|
|
atmosphere_radii[1] = atmosphere_radii[0] + atmosphere_upper_limit;
|
|
atmosphere_radii[3] = atmosphere_radii[1] * atmosphere_radii[1];
|
|
|
|
// Trigger transmittance and multiscattering LUT render
|
|
m_render_transmittance_lut = true;
|
|
m_render_multiscattering_lut = true;
|
|
}
|
|
|
|
void sky_pass::set_observer_elevation(float elevation)
|
|
{
|
|
observer_elevation = elevation;
|
|
observer_position_tween[1] = {0.0f, atmosphere_radii.x() + observer_elevation, 0.0f};
|
|
}
|
|
|
|
void sky_pass::set_rayleigh_parameters(float scale_height, const float3& scattering)
|
|
{
|
|
rayleigh_parameters =
|
|
{
|
|
-1.0f / scale_height,
|
|
scattering.x(),
|
|
scattering.y(),
|
|
scattering.z()
|
|
};
|
|
|
|
// Trigger transmittance and multiscattering LUT render
|
|
m_render_transmittance_lut = true;
|
|
m_render_multiscattering_lut = true;
|
|
}
|
|
|
|
void sky_pass::set_mie_parameters(float scale_height, float scattering, float extinction, float anisotropy)
|
|
{
|
|
mie_parameters =
|
|
{
|
|
-1.0f / scale_height,
|
|
scattering,
|
|
extinction,
|
|
anisotropy
|
|
};
|
|
|
|
// Trigger transmittance and multiscattering LUT render
|
|
m_render_transmittance_lut = true;
|
|
m_render_multiscattering_lut = true;
|
|
}
|
|
|
|
void sky_pass::set_ozone_parameters(float lower_limit, float upper_limit, float mode, const float3& absorption)
|
|
{
|
|
ozone_distribution =
|
|
{
|
|
1.0f / (lower_limit - mode),
|
|
1.0f / (upper_limit - mode),
|
|
mode
|
|
};
|
|
ozone_absorption = absorption;
|
|
|
|
// Trigger transmittance and multiscattering LUT render
|
|
m_render_transmittance_lut = true;
|
|
m_render_multiscattering_lut = true;
|
|
}
|
|
|
|
void sky_pass::set_airglow_luminance(const float3& luminance)
|
|
{
|
|
airglow_luminance = luminance;
|
|
}
|
|
|
|
void sky_pass::set_ground_albedo(const float3& albedo)
|
|
{
|
|
m_ground_albedo = albedo;
|
|
|
|
// Trigger multiscattering LUT render
|
|
m_render_multiscattering_lut = true;
|
|
}
|
|
|
|
void sky_pass::set_moon_position(const float3& position)
|
|
{
|
|
moon_position_tween[1] = position;
|
|
}
|
|
|
|
void sky_pass::set_moon_rotation(const math::quaternion<float>& rotation)
|
|
{
|
|
moon_rotation_tween[1] = rotation;
|
|
}
|
|
|
|
void sky_pass::set_moon_angular_radius(float angular_radius)
|
|
{
|
|
moon_angular_radius_tween[1] = angular_radius;
|
|
}
|
|
|
|
void sky_pass::set_moon_sunlight_direction(const float3& direction)
|
|
{
|
|
moon_sunlight_direction_tween[1] = direction;
|
|
}
|
|
|
|
void sky_pass::set_moon_sunlight_illuminance(const float3& illuminance)
|
|
{
|
|
moon_sunlight_illuminance_tween[1] = illuminance;
|
|
}
|
|
|
|
void sky_pass::set_moon_planetlight_direction(const float3& direction)
|
|
{
|
|
moon_planetlight_direction_tween[1] = direction;
|
|
}
|
|
|
|
void sky_pass::set_moon_planetlight_illuminance(const float3& illuminance)
|
|
{
|
|
moon_planetlight_illuminance_tween[1] = illuminance;
|
|
}
|
|
|
|
void sky_pass::set_moon_illuminance(const float3& illuminance, const float3& transmitted_illuminance)
|
|
{
|
|
moon_illuminance_tween[1] = illuminance;
|
|
moon_transmitted_illuminance = transmitted_illuminance;
|
|
}
|
|
|
|
void sky_pass::set_sky_probe(std::shared_ptr<scene::light_probe> probe)
|
|
{
|
|
m_sky_probe = probe;
|
|
|
|
if (m_sky_probe && m_sky_probe->get_luminance_texture())
|
|
{
|
|
auto& luminance_texture = *m_sky_probe->get_luminance_texture();
|
|
|
|
std::uint16_t face_size = luminance_texture.get_face_size();
|
|
const std::uint8_t mip_count = static_cast<std::uint8_t>(std::bit_width(face_size));
|
|
|
|
m_sky_probe_framebuffers.resize(mip_count);
|
|
for (std::uint8_t i = 0; i < mip_count; ++i)
|
|
{
|
|
m_sky_probe_framebuffers[i] = std::make_unique<gl::framebuffer>(face_size, face_size);
|
|
m_sky_probe_framebuffers[i]->attach(gl::framebuffer_attachment_type::color, &luminance_texture, i);
|
|
face_size >>= 1;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
m_sky_probe_framebuffers.clear();
|
|
}
|
|
|
|
rebuild_sky_probe_command_buffer();
|
|
}
|
|
|
|
void sky_pass::rebuild_transmittance_lut_shader_program()
|
|
{
|
|
m_transmittance_lut_shader_program = m_transmittance_lut_shader_template->build
|
|
(
|
|
{
|
|
{"SAMPLE_COUNT", std::to_string(m_transmittance_lut_sample_count)}
|
|
}
|
|
);
|
|
if (!m_transmittance_lut_shader_program->linked())
|
|
{
|
|
debug::log::error("Failed to build sky transmittance LUT shader program: {}", m_transmittance_lut_shader_program->info());
|
|
debug::log::warning("{}", m_transmittance_lut_shader_template->configure(gl::shader_stage::vertex));
|
|
}
|
|
}
|
|
|
|
void sky_pass::rebuild_transmittance_lut_command_buffer()
|
|
{
|
|
m_transmittance_lut_command_buffer.clear();
|
|
|
|
if (!m_transmittance_lut_shader_program->linked() || !m_transmittance_lut_texture)
|
|
{
|
|
return;
|
|
}
|
|
|
|
// Bind framebuffer and shader program
|
|
m_transmittance_lut_command_buffer.emplace_back
|
|
(
|
|
[&]()
|
|
{
|
|
rasterizer->set_viewport(0, 0, m_transmittance_lut_resolution.x(), m_transmittance_lut_resolution.y());
|
|
rasterizer->use_framebuffer(*m_transmittance_lut_framebuffer);
|
|
rasterizer->use_program(*m_transmittance_lut_shader_program);
|
|
}
|
|
);
|
|
|
|
// Update shader variables
|
|
if (auto atmosphere_radii_var = m_transmittance_lut_shader_program->variable("atmosphere_radii"))
|
|
{
|
|
m_transmittance_lut_command_buffer.emplace_back([&, atmosphere_radii_var](){atmosphere_radii_var->update(atmosphere_radii);});
|
|
}
|
|
if (auto rayleigh_parameters_var = m_transmittance_lut_shader_program->variable("rayleigh_parameters"))
|
|
{
|
|
m_transmittance_lut_command_buffer.emplace_back([&, rayleigh_parameters_var](){rayleigh_parameters_var->update(rayleigh_parameters);});
|
|
}
|
|
if (auto mie_parameters_var = m_transmittance_lut_shader_program->variable("mie_parameters"))
|
|
{
|
|
m_transmittance_lut_command_buffer.emplace_back([&, mie_parameters_var](){mie_parameters_var->update(mie_parameters);});
|
|
}
|
|
if (auto ozone_distribution_var = m_transmittance_lut_shader_program->variable("ozone_distribution"))
|
|
{
|
|
m_transmittance_lut_command_buffer.emplace_back([&, ozone_distribution_var](){ozone_distribution_var->update(ozone_distribution);});
|
|
}
|
|
if (auto ozone_absorption_var = m_transmittance_lut_shader_program->variable("ozone_absorption"))
|
|
{
|
|
m_transmittance_lut_command_buffer.emplace_back([&, ozone_absorption_var](){ozone_absorption_var->update(ozone_absorption);});
|
|
}
|
|
if (auto resolution_var = m_transmittance_lut_shader_program->variable("resolution"))
|
|
{
|
|
m_transmittance_lut_command_buffer.emplace_back([&, resolution_var](){resolution_var->update(math::vector2<float>(m_transmittance_lut_resolution));});
|
|
}
|
|
|
|
// Draw quad
|
|
m_transmittance_lut_command_buffer.emplace_back
|
|
(
|
|
[&]()
|
|
{
|
|
rasterizer->draw_arrays(*quad_vao, gl::drawing_mode::triangle_strip, 0, 4);
|
|
}
|
|
);
|
|
}
|
|
|
|
void sky_pass::rebuild_multiscattering_lut_shader_program()
|
|
{
|
|
m_multiscattering_lut_shader_program = m_multiscattering_lut_shader_template->build
|
|
(
|
|
{
|
|
{"DIRECTION_SAMPLE_COUNT", std::to_string(m_multiscattering_lut_direction_sample_count)},
|
|
{"SCATTER_SAMPLE_COUNT", std::to_string(m_multiscattering_lut_scatter_sample_count)}
|
|
}
|
|
);
|
|
if (!m_multiscattering_lut_shader_program->linked())
|
|
{
|
|
debug::log::error("Failed to build sky multiscattering LUT shader program: {}", m_multiscattering_lut_shader_program->info());
|
|
debug::log::warning("{}", m_multiscattering_lut_shader_template->configure(gl::shader_stage::vertex));
|
|
}
|
|
}
|
|
|
|
void sky_pass::rebuild_multiscattering_lut_command_buffer()
|
|
{
|
|
m_multiscattering_lut_command_buffer.clear();
|
|
|
|
if (!m_multiscattering_lut_shader_program->linked() || !m_multiscattering_lut_texture)
|
|
{
|
|
return;
|
|
}
|
|
|
|
// Bind framebuffer and shader program
|
|
m_multiscattering_lut_command_buffer.emplace_back
|
|
(
|
|
[&]()
|
|
{
|
|
rasterizer->set_viewport(0, 0, m_multiscattering_lut_resolution.x(), m_multiscattering_lut_resolution.y());
|
|
rasterizer->use_framebuffer(*m_multiscattering_lut_framebuffer);
|
|
rasterizer->use_program(*m_multiscattering_lut_shader_program);
|
|
}
|
|
);
|
|
|
|
// Update shader variables
|
|
if (auto atmosphere_radii_var = m_multiscattering_lut_shader_program->variable("atmosphere_radii"))
|
|
{
|
|
m_multiscattering_lut_command_buffer.emplace_back([&, atmosphere_radii_var](){atmosphere_radii_var->update(atmosphere_radii);});
|
|
}
|
|
if (auto rayleigh_parameters_var = m_multiscattering_lut_shader_program->variable("rayleigh_parameters"))
|
|
{
|
|
m_multiscattering_lut_command_buffer.emplace_back([&, rayleigh_parameters_var](){rayleigh_parameters_var->update(rayleigh_parameters);});
|
|
}
|
|
if (auto mie_parameters_var = m_multiscattering_lut_shader_program->variable("mie_parameters"))
|
|
{
|
|
m_multiscattering_lut_command_buffer.emplace_back([&, mie_parameters_var](){mie_parameters_var->update(mie_parameters);});
|
|
}
|
|
if (auto ozone_distribution_var = m_multiscattering_lut_shader_program->variable("ozone_distribution"))
|
|
{
|
|
m_multiscattering_lut_command_buffer.emplace_back([&, ozone_distribution_var](){ozone_distribution_var->update(ozone_distribution);});
|
|
}
|
|
if (auto ozone_absorption_var = m_multiscattering_lut_shader_program->variable("ozone_absorption"))
|
|
{
|
|
m_multiscattering_lut_command_buffer.emplace_back([&, ozone_absorption_var](){ozone_absorption_var->update(ozone_absorption);});
|
|
}
|
|
if (auto ground_albedo_var = m_multiscattering_lut_shader_program->variable("ground_albedo"))
|
|
{
|
|
m_multiscattering_lut_command_buffer.emplace_back([&, ground_albedo_var](){ground_albedo_var->update(m_ground_albedo);});
|
|
}
|
|
if (auto resolution_var = m_multiscattering_lut_shader_program->variable("resolution"))
|
|
{
|
|
m_multiscattering_lut_command_buffer.emplace_back([&, resolution_var](){resolution_var->update(math::vector2<float>(m_multiscattering_lut_resolution));});
|
|
}
|
|
if (auto transmittance_lut_var = m_multiscattering_lut_shader_program->variable("transmittance_lut"))
|
|
{
|
|
m_multiscattering_lut_command_buffer.emplace_back([&, transmittance_lut_var](){transmittance_lut_var->update(*m_transmittance_lut_texture);});
|
|
}
|
|
|
|
// Draw quad
|
|
m_multiscattering_lut_command_buffer.emplace_back
|
|
(
|
|
[&]()
|
|
{
|
|
rasterizer->draw_arrays(*quad_vao, gl::drawing_mode::triangle_strip, 0, 4);
|
|
}
|
|
);
|
|
}
|
|
|
|
void sky_pass::rebuild_luminance_lut_shader_program()
|
|
{
|
|
m_luminance_lut_shader_program = m_luminance_lut_shader_template->build
|
|
(
|
|
{
|
|
{"SAMPLE_COUNT", std::to_string(m_luminance_lut_sample_count)}
|
|
}
|
|
);
|
|
if (!m_luminance_lut_shader_program->linked())
|
|
{
|
|
debug::log::error("Failed to build sky luminance LUT shader program: {}", m_luminance_lut_shader_program->info());
|
|
debug::log::warning("{}", m_luminance_lut_shader_template->configure(gl::shader_stage::vertex));
|
|
}
|
|
}
|
|
|
|
void sky_pass::rebuild_luminance_lut_command_buffer()
|
|
{
|
|
m_luminance_lut_command_buffer.clear();
|
|
|
|
if (!m_luminance_lut_shader_program->linked() || !m_luminance_lut_texture)
|
|
{
|
|
return;
|
|
}
|
|
|
|
// Bind framebuffer and shader program
|
|
m_luminance_lut_command_buffer.emplace_back
|
|
(
|
|
[&]()
|
|
{
|
|
rasterizer->set_viewport(0, 0, m_luminance_lut_resolution.x(), m_luminance_lut_resolution.y());
|
|
rasterizer->use_framebuffer(*m_luminance_lut_framebuffer);
|
|
rasterizer->use_program(*m_luminance_lut_shader_program);
|
|
}
|
|
);
|
|
|
|
// Update shader variables
|
|
if (auto light_direction_var = m_luminance_lut_shader_program->variable("light_direction"))
|
|
{
|
|
m_luminance_lut_command_buffer.emplace_back([&, light_direction_var](){light_direction_var->update(dominant_light_direction);});
|
|
}
|
|
if (auto light_illuminance_var = m_luminance_lut_shader_program->variable("light_illuminance"))
|
|
{
|
|
m_luminance_lut_command_buffer.emplace_back([&, light_illuminance_var](){light_illuminance_var->update(dominant_light_illuminance);});
|
|
}
|
|
if (auto atmosphere_radii_var = m_luminance_lut_shader_program->variable("atmosphere_radii"))
|
|
{
|
|
m_luminance_lut_command_buffer.emplace_back([&, atmosphere_radii_var](){atmosphere_radii_var->update(atmosphere_radii);});
|
|
}
|
|
if (auto observer_position_var = m_luminance_lut_shader_program->variable("observer_position"))
|
|
{
|
|
m_luminance_lut_command_buffer.emplace_back([&, observer_position_var](){observer_position_var->update(observer_position);});
|
|
}
|
|
if (auto rayleigh_parameters_var = m_luminance_lut_shader_program->variable("rayleigh_parameters"))
|
|
{
|
|
m_luminance_lut_command_buffer.emplace_back([&, rayleigh_parameters_var](){rayleigh_parameters_var->update(rayleigh_parameters);});
|
|
}
|
|
if (auto mie_parameters_var = m_luminance_lut_shader_program->variable("mie_parameters"))
|
|
{
|
|
m_luminance_lut_command_buffer.emplace_back([&, mie_parameters_var](){mie_parameters_var->update(mie_parameters);});
|
|
}
|
|
if (auto ozone_distribution_var = m_luminance_lut_shader_program->variable("ozone_distribution"))
|
|
{
|
|
m_luminance_lut_command_buffer.emplace_back([&, ozone_distribution_var](){ozone_distribution_var->update(ozone_distribution);});
|
|
}
|
|
if (auto ozone_absorption_var = m_luminance_lut_shader_program->variable("ozone_absorption"))
|
|
{
|
|
m_luminance_lut_command_buffer.emplace_back([&, ozone_absorption_var](){ozone_absorption_var->update(ozone_absorption);});
|
|
}
|
|
if (auto airglow_luminance_var = m_luminance_lut_shader_program->variable("airglow_luminance"))
|
|
{
|
|
m_luminance_lut_command_buffer.emplace_back([&, airglow_luminance_var](){airglow_luminance_var->update(airglow_luminance * camera_exposure);});
|
|
}
|
|
if (auto resolution_var = m_luminance_lut_shader_program->variable("resolution"))
|
|
{
|
|
m_luminance_lut_command_buffer.emplace_back([&, resolution_var](){resolution_var->update(math::vector2<float>(m_luminance_lut_resolution));});
|
|
}
|
|
if (auto transmittance_lut_var = m_luminance_lut_shader_program->variable("transmittance_lut"))
|
|
{
|
|
m_luminance_lut_command_buffer.emplace_back([&, transmittance_lut_var](){transmittance_lut_var->update(*m_transmittance_lut_texture);});
|
|
}
|
|
if (auto multiscattering_lut_var = m_luminance_lut_shader_program->variable("multiscattering_lut"))
|
|
{
|
|
m_luminance_lut_command_buffer.emplace_back([&, multiscattering_lut_var](){multiscattering_lut_var->update(*m_multiscattering_lut_texture);});
|
|
}
|
|
|
|
// Draw quad
|
|
m_luminance_lut_command_buffer.emplace_back
|
|
(
|
|
[&]()
|
|
{
|
|
rasterizer->draw_arrays(*quad_vao, gl::drawing_mode::triangle_strip, 0, 4);
|
|
}
|
|
);
|
|
}
|
|
|
|
void sky_pass::rebuild_sky_probe_command_buffer()
|
|
{
|
|
m_sky_probe_command_buffer.clear();
|
|
|
|
if (!m_sky_probe_shader_program->linked() || m_sky_probe_framebuffers.empty())
|
|
{
|
|
return;
|
|
}
|
|
|
|
// Bind sky probe framebuffer and shader program
|
|
m_sky_probe_command_buffer.emplace_back
|
|
(
|
|
[&]()
|
|
{
|
|
const auto resolution = m_sky_probe->get_luminance_texture()->get_face_size();
|
|
rasterizer->set_viewport(0, 0, resolution, resolution);
|
|
rasterizer->use_framebuffer(*m_sky_probe_framebuffers[0]);
|
|
rasterizer->use_program(*m_sky_probe_shader_program);
|
|
}
|
|
);
|
|
|
|
if (auto luminance_lut_var = m_sky_probe_shader_program->variable("luminance_lut"))
|
|
{
|
|
m_sky_probe_command_buffer.emplace_back([&, luminance_lut_var](){luminance_lut_var->update(*m_luminance_lut_texture);});
|
|
}
|
|
if (auto light_direction_var = m_sky_probe_shader_program->variable("light_direction"))
|
|
{
|
|
m_sky_probe_command_buffer.emplace_back([&, light_direction_var](){light_direction_var->update(dominant_light_direction);});
|
|
}
|
|
if (auto observer_position_var = m_sky_probe_shader_program->variable("observer_position"))
|
|
{
|
|
m_sky_probe_command_buffer.emplace_back([&, observer_position_var](){observer_position_var->update(observer_position);});
|
|
}
|
|
if (auto atmosphere_radii_var = m_sky_probe_shader_program->variable("atmosphere_radii"))
|
|
{
|
|
m_sky_probe_command_buffer.emplace_back([&, atmosphere_radii_var](){atmosphere_radii_var->update(atmosphere_radii);});
|
|
}
|
|
|
|
// Draw point
|
|
m_sky_probe_command_buffer.emplace_back
|
|
(
|
|
[&]()
|
|
{
|
|
rasterizer->draw_arrays(*quad_vao, gl::drawing_mode::points, 0, 1);
|
|
m_sky_probe->set_luminance_outdated(true);
|
|
m_sky_probe->set_illuminance_outdated(true);
|
|
}
|
|
);
|
|
|
|
if (!m_cubemap_downsample_shader_program->linked())
|
|
{
|
|
return;
|
|
}
|
|
|
|
auto cubemap_var = m_cubemap_downsample_shader_program->variable("cubemap");
|
|
if (!cubemap_var)
|
|
{
|
|
return;
|
|
}
|
|
|
|
m_sky_probe_command_buffer.emplace_back
|
|
(
|
|
[&, cubemap_var]()
|
|
{
|
|
// Bind downsample shader program
|
|
rasterizer->use_program(*m_cubemap_downsample_shader_program);
|
|
|
|
// Change texture filter mode to linear to prevent undefined access when reading and writing to different mip levels of the same texture
|
|
// m_sky_probe->get_luminance_texture()->set_min_filter(gl::texture_min_filter::linear);
|
|
|
|
// Update cubemap shader variable
|
|
cubemap_var->update(*m_sky_probe->get_luminance_texture());
|
|
}
|
|
);
|
|
|
|
for (std::size_t i = 1; i < m_sky_probe_framebuffers.size(); ++i)
|
|
{
|
|
const auto resolution = m_sky_probe->get_luminance_texture()->get_face_size() >> i;
|
|
|
|
// Bind sky probe mip framebuffer
|
|
m_sky_probe_command_buffer.emplace_back
|
|
(
|
|
[&, resolution, i]()
|
|
{
|
|
rasterizer->set_viewport(0, 0, resolution, resolution);
|
|
|
|
// Restrict mipmap range
|
|
const std::uint8_t base_mip_level = static_cast<std::uint8_t>(i - 1);
|
|
m_sky_probe->get_luminance_texture()->set_mipmap_range(base_mip_level, base_mip_level);
|
|
|
|
rasterizer->use_framebuffer(*m_sky_probe_framebuffers[i]);
|
|
rasterizer->draw_arrays(*quad_vao, gl::drawing_mode::points, 0, 1);
|
|
}
|
|
);
|
|
}
|
|
|
|
// Restore mipmap range
|
|
m_sky_probe_command_buffer.emplace_back
|
|
(
|
|
[&]()
|
|
{
|
|
m_sky_probe->get_luminance_texture()->set_mipmap_range(0, 255);
|
|
}
|
|
);
|
|
|
|
|
|
|
|
// Restore texture filter mode
|
|
// m_sky_probe_command_buffer.emplace_back
|
|
// (
|
|
// [&]()
|
|
// {
|
|
// m_sky_probe->get_luminance_texture()->set_min_filter(gl::texture_min_filter::linear_mipmap_linear);
|
|
// }
|
|
// );
|
|
}
|
|
|
|
} // namespace render
|