💿🐜 Antkeeper source code
https://antkeeper.com
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362 lines
12 KiB
362 lines
12 KiB
/*
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* Copyright (C) 2021 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 "renderer/passes/sky-pass.hpp"
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#include "resources/resource-manager.hpp"
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#include "gl/rasterizer.hpp"
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#include "gl/framebuffer.hpp"
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#include "gl/shader-program.hpp"
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#include "gl/shader-input.hpp"
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#include "gl/vertex-buffer.hpp"
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#include "gl/vertex-array.hpp"
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#include "gl/vertex-attribute-type.hpp"
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#include "gl/drawing-mode.hpp"
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#include "gl/texture-2d.hpp"
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#include "gl/texture-wrapping.hpp"
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#include "gl/texture-filter.hpp"
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#include "renderer/vertex-attributes.hpp"
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#include "renderer/render-context.hpp"
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#include "renderer/model.hpp"
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#include "renderer/material.hpp"
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#include "scene/camera.hpp"
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#include "utility/fundamental-types.hpp"
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#include "math/interpolation.hpp"
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#include <cmath>
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#include <glad/glad.h>
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sky_pass::sky_pass(gl::rasterizer* rasterizer, const gl::framebuffer* framebuffer, resource_manager* resource_manager):
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render_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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sky_shader_program(nullptr),
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moon_model(nullptr),
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moon_material(nullptr),
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moon_model_vao(nullptr),
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moon_shader_program(nullptr),
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blue_noise_map(nullptr),
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sky_gradient(nullptr),
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sky_gradient2(nullptr),
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observer_location{0.0f, 0.0f, 0.0f},
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time_tween(nullptr),
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time_of_day_tween(0.0, math::lerp<float, float>),
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julian_day_tween(0.0, math::lerp<float, float>),
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sun_position_tween(float3{1.0f, 1.0f, 1.0f}, math::lerp<float3, float>),
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sun_az_el_tween(float2{0.0f, 0.0f}, math::lerp<float2, float>),
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moon_position_tween(float3{1.0f, 1.0f, 1.0f}, math::lerp<float3, float>),
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moon_az_el_tween(float2{0.0f, 0.0f}, math::lerp<float2, float>),
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horizon_color_tween(float3{0.0f, 0.0f, 0.0f}, math::lerp<float3, float>),
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zenith_color_tween(float3{1.0f, 1.0f, 1.0f}, math::lerp<float3, float>)
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{}
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sky_pass::~sky_pass()
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{}
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void sky_pass::render(render_context* context) const
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{
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rasterizer->use_framebuffer(*framebuffer);
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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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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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float time = (*time_tween)[context->alpha];
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float2 resolution = {static_cast<float>(std::get<0>(viewport)), static_cast<float>(std::get<1>(viewport))};
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const scene::camera& camera = *context->camera;
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float clip_near = camera.get_clip_near_tween().interpolate(context->alpha);
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float clip_far = camera.get_clip_far_tween().interpolate(context->alpha);
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float3 model_scale = float3{1.0f, 1.0f, 1.0f} * (clip_near + clip_far) * 0.5f;
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float4x4 model = math::scale(math::identity4x4<float>, model_scale);
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float4x4 view = math::resize<4, 4>(math::resize<3, 3>(camera.get_view_tween().interpolate(context->alpha)));
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float4x4 model_view = view * model;
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float4x4 projection = camera.get_projection_tween().interpolate(context->alpha);
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float4x4 model_view_projection = projection * model_view;
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float exposure = std::exp2(camera.get_exposure_tween().interpolate(context->alpha));
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float time_of_day = time_of_day_tween.interpolate(context->alpha);
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float julian_day = julian_day_tween.interpolate(context->alpha);
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float3 sun_position = sun_position_tween.interpolate(context->alpha);
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float2 sun_az_el = sun_az_el_tween.interpolate(context->alpha);
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float3 moon_position = moon_position_tween.interpolate(context->alpha);
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float2 moon_az_el = moon_az_el_tween.interpolate(context->alpha);
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float3 horizon_color = horizon_color_tween.interpolate(context->alpha);
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float3 zenith_color = zenith_color_tween.interpolate(context->alpha);
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// Draw sky model
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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_input)
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model_view_projection_input->upload(model_view_projection);
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if (horizon_color_input)
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horizon_color_input->upload(horizon_color);
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if (zenith_color_input)
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zenith_color_input->upload(zenith_color);
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if (mouse_input)
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mouse_input->upload(mouse_position);
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if (resolution_input)
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resolution_input->upload(resolution);
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if (time_input)
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time_input->upload(time);
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if (time_of_day_input)
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time_of_day_input->upload(time_of_day);
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if (blue_noise_map_input)
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blue_noise_map_input->upload(blue_noise_map);
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if (sky_gradient_input && sky_gradient)
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sky_gradient_input->upload(sky_gradient);
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if (sky_gradient2_input && sky_gradient2)
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sky_gradient2_input->upload(sky_gradient2);
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if (observer_location_input)
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observer_location_input->upload(observer_location);
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if (sun_position_input)
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sun_position_input->upload(sun_position);
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if (sun_az_el_input)
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sun_az_el_input->upload(sun_az_el);
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if (moon_position_input)
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moon_position_input->upload(moon_position);
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if (moon_az_el_input)
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moon_az_el_input->upload(moon_az_el);
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if (julian_day_input)
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julian_day_input->upload(julian_day);
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if (cos_moon_angular_radius_input)
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cos_moon_angular_radius_input->upload(cos_moon_angular_radius);
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if (cos_sun_angular_radius_input)
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cos_sun_angular_radius_input->upload(cos_sun_angular_radius);
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if (exposure_input)
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exposure_input->upload(exposure);
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sky_material->upload(context->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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// Draw moon model
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if (moon_az_el[1] >= -moon_angular_radius)
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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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float moon_distance = (clip_near + 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 = moon_position * -moon_distance;
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moon_transform.rotation = moon_rotation;
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moon_transform.scale = {moon_radius, moon_radius, moon_radius};
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model = math::matrix_cast(moon_transform);
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model_view = view * model;
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model_view_projection = projection * model_view;
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float3x3 normal_model = math::transpose(math::inverse(math::resize<3, 3>(model)));
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rasterizer->use_program(*moon_shader_program);
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if (moon_model_view_projection_input)
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moon_model_view_projection_input->upload(model_view_projection);
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if (moon_normal_model_input)
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moon_normal_model_input->upload(normal_model);
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if (moon_moon_position_input)
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moon_moon_position_input->upload(moon_position);
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if (moon_sun_position_input)
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moon_sun_position_input->upload(sun_position);
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moon_material->upload(context->alpha);
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rasterizer->draw_arrays(*moon_model_vao, moon_model_drawing_mode, moon_model_start_index, moon_model_index_count);
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}
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}
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void sky_pass::set_sky_model(const model* model)
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{
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sky_model = model;
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if (sky_model)
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{
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sky_model_vao = model->get_vertex_array();
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const std::vector<model_group*>& groups = *model->get_groups();
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for (model_group* group: groups)
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{
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sky_material = group->get_material();
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sky_model_drawing_mode = group->get_drawing_mode();
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sky_model_start_index = group->get_start_index();
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sky_model_index_count = group->get_index_count();
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}
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if (sky_material)
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{
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sky_shader_program = sky_material->get_shader_program();
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if (sky_shader_program)
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{
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model_view_projection_input = sky_shader_program->get_input("model_view_projection");
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horizon_color_input = sky_shader_program->get_input("horizon_color");
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zenith_color_input = sky_shader_program->get_input("zenith_color");
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mouse_input = sky_shader_program->get_input("mouse");
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resolution_input = sky_shader_program->get_input("resolution");
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time_input = sky_shader_program->get_input("time");
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time_of_day_input = sky_shader_program->get_input("time_of_day");
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blue_noise_map_input = sky_shader_program->get_input("blue_noise_map");
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sky_gradient_input = sky_shader_program->get_input("sky_gradient");
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sky_gradient2_input = sky_shader_program->get_input("sky_gradient2");
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observer_location_input = sky_shader_program->get_input("observer_location");
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sun_position_input = sky_shader_program->get_input("sun_position");
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sun_az_el_input = sky_shader_program->get_input("sun_az_el");
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moon_position_input = sky_shader_program->get_input("moon_position");
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moon_az_el_input = sky_shader_program->get_input("moon_az_el");
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julian_day_input = sky_shader_program->get_input("julian_day");
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cos_moon_angular_radius_input = sky_shader_program->get_input("cos_moon_angular_radius");
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cos_sun_angular_radius_input = sky_shader_program->get_input("cos_sun_angular_radius");
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exposure_input = sky_shader_program->get_input("camera.exposure");
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}
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}
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}
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else
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{
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sky_model_vao = nullptr;
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}
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}
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void sky_pass::set_moon_model(const model* model)
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{
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moon_model = model;
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if (moon_model)
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{
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moon_model_vao = model->get_vertex_array();
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const std::vector<model_group*>& groups = *model->get_groups();
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for (model_group* group: groups)
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{
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moon_material = group->get_material();
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moon_model_drawing_mode = group->get_drawing_mode();
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moon_model_start_index = group->get_start_index();
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moon_model_index_count = group->get_index_count();
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}
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if (moon_material)
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{
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moon_shader_program = moon_material->get_shader_program();
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if (moon_shader_program)
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{
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moon_model_view_projection_input = moon_shader_program->get_input("model_view_projection");
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moon_normal_model_input = moon_shader_program->get_input("normal_model");
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moon_moon_position_input = moon_shader_program->get_input("moon_position");
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moon_sun_position_input = moon_shader_program->get_input("sun_position");
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}
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}
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}
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else
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{
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moon_model = nullptr;
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}
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}
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void sky_pass::update_tweens()
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{
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julian_day_tween.update();
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sun_position_tween.update();
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sun_az_el_tween.update();
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moon_position_tween.update();
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moon_az_el_tween.update();
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time_of_day_tween.update();
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horizon_color_tween.update();
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zenith_color_tween.update();
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}
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void sky_pass::set_time_of_day(float time)
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{
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time_of_day_tween[1] = time;
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}
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void sky_pass::set_time_tween(const tween<double>* time)
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{
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this->time_tween = time;
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}
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void sky_pass::set_blue_noise_map(const gl::texture_2d* texture)
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{
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blue_noise_map = texture;
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}
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void sky_pass::set_sky_gradient(const gl::texture_2d* texture, const gl::texture_2d* texture2)
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{
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sky_gradient = texture;
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sky_gradient2 = texture2;
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}
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void sky_pass::set_julian_day(float jd)
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{
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julian_day_tween[1] = jd;
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}
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void sky_pass::set_observer_location(float altitude, float latitude, float longitude)
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{
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observer_location = {altitude, latitude, longitude};
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}
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void sky_pass::set_sun_coordinates(const float3& position, const float2& az_el)
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{
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sun_position_tween[1] = position;
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sun_az_el_tween[1] = az_el;
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}
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void sky_pass::set_moon_coordinates(const float3& position, const float2& az_el)
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{
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moon_position_tween[1] = position;
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moon_az_el_tween[1] = az_el;
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}
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void sky_pass::set_moon_rotation(const math::quaternion<float>& rotation)
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{
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moon_rotation = rotation;
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}
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void sky_pass::set_moon_angular_radius(float radius)
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{
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moon_angular_radius = radius;
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cos_moon_angular_radius = std::cos(moon_angular_radius);
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}
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void sky_pass::set_sun_angular_radius(float radius)
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{
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sun_angular_radius = radius;
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cos_sun_angular_radius = std::cos(sun_angular_radius);
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}
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void sky_pass::set_horizon_color(const float3& color)
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{
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horizon_color_tween[1] = color;
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}
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void sky_pass::set_zenith_color(const float3& color)
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{
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zenith_color_tween[1] = color;
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}
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void sky_pass::handle_event(const mouse_moved_event& event)
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{
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mouse_position = {static_cast<float>(event.x), static_cast<float>(event.y)};
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}
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