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- /*
- * Copyright (C) 2020 Christopher J. Howard
- *
- * This file is part of Antkeeper source code.
- *
- * Antkeeper source code is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * Antkeeper source code is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with Antkeeper source code. If not, see <http://www.gnu.org/licenses/>.
- */
-
- #include "renderer/passes/sky-pass.hpp"
- #include "resources/resource-manager.hpp"
- #include "rasterizer/rasterizer.hpp"
- #include "rasterizer/framebuffer.hpp"
- #include "rasterizer/shader-program.hpp"
- #include "rasterizer/shader-input.hpp"
- #include "rasterizer/vertex-buffer.hpp"
- #include "rasterizer/vertex-array.hpp"
- #include "rasterizer/vertex-attribute-type.hpp"
- #include "rasterizer/drawing-mode.hpp"
- #include "rasterizer/texture-2d.hpp"
- #include "rasterizer/texture-wrapping.hpp"
- #include "rasterizer/texture-filter.hpp"
- #include "renderer/vertex-attributes.hpp"
- #include "renderer/render-context.hpp"
- #include "renderer/model.hpp"
- #include "scene/camera.hpp"
- #include "scene/scene.hpp"
- #include "scene/scene.hpp"
- #include "utility/fundamental-types.hpp"
- #include <cmath>
- #include <glad/glad.h>
-
- sky_pass::sky_pass(::rasterizer* rasterizer, const ::framebuffer* framebuffer, resource_manager* resource_manager):
- render_pass(rasterizer, framebuffer),
- mouse_position({0.0f, 0.0f}),
- time_of_day(0.0f),
- sky_model(nullptr),
- sky_model_vao(nullptr),
- blue_noise_map(nullptr),
- observer_coordinates{0.0f, 0.0f}
- {
- shader_program = resource_manager->load<::shader_program>("sky.glsl");
- model_view_projection_input = shader_program->get_input("model_view_projection");
- sun_color_input = shader_program->get_input("sun_color");
- sky_gradient_input = shader_program->get_input("sky_gradient");
- mouse_input = shader_program->get_input("mouse");
- resolution_input = shader_program->get_input("resolution");
- time_input = shader_program->get_input("time");
- time_of_day_input = shader_program->get_input("time_of_day");
- blue_noise_map_input = shader_program->get_input("blue_noise_map");
- observer_coordinates_input = shader_program->get_input("observer_coordinates");
- sun_position_input = shader_program->get_input("sun_position");
- sun_az_el_input = shader_program->get_input("sun_az_el");
- moon_position_input = shader_program->get_input("moon_position");
- moon_az_el_input = shader_program->get_input("moon_az_el");
-
- const float vertex_data[] =
- {
- -1.0f, 1.0f, 0.0f,
- -1.0f, -1.0f, 0.0f,
- 1.0f, 1.0f, 0.0f,
- 1.0f, 1.0f, 0.0f,
- -1.0f, -1.0f, 0.0f,
- 1.0f, -1.0f, 0.0f
- };
-
- std::size_t vertex_size = 3;
- std::size_t vertex_stride = sizeof(float) * vertex_size;
- std::size_t vertex_count = 6;
-
- quad_vbo = new vertex_buffer(sizeof(float) * vertex_size * vertex_count, vertex_data);
- quad_vao = new vertex_array();
- quad_vao->bind_attribute(VERTEX_POSITION_LOCATION, *quad_vbo, 3, vertex_attribute_type::float_32, vertex_stride, 0);
-
- sky_gradient[0] = {1.0, 0.0f, 0.0f, 0.0f};
- sky_gradient[1] = {0.0, 1.0f, 0.0f, 0.333f};
- sky_gradient[2] = {0.0, 0.0f, 1.0f, 0.667f};
- sky_gradient[3] = {1.0, 1.0f, 0.0f, 1.0f};
- }
-
- sky_pass::~sky_pass()
- {
- delete quad_vao;
- delete quad_vbo;
- }
-
- void sky_pass::render(render_context* context) const
- {
- if (!sky_model_vao)
- return;
-
- rasterizer->use_framebuffer(*framebuffer);
-
- glDisable(GL_BLEND);
- glDisable(GL_DEPTH_TEST);
- glDepthMask(GL_FALSE);
- glEnable(GL_CULL_FACE);
- glCullFace(GL_BACK);
-
- auto viewport = framebuffer->get_dimensions();
- rasterizer->set_viewport(0, 0, std::get<0>(viewport), std::get<1>(viewport));
-
- float time = (time_tween) ? time_tween->interpolate(context->alpha) : 0.0f;
- float2 resolution = {static_cast<float>(std::get<0>(viewport)), static_cast<float>(std::get<1>(viewport))};
-
- const ::camera& camera = *context->camera;
- float clip_near = camera.get_clip_near_tween().interpolate(context->alpha);
- float clip_far = camera.get_clip_far_tween().interpolate(context->alpha);
- float3 model_scale = float3{1.0f, 1.0f, 1.0f} * (clip_near + clip_far) * 0.5f;
- float4x4 model = math::scale(math::identity4x4<float>, model_scale);
- float4x4 model_view = math::resize<4, 4>(math::resize<3, 3>(camera.get_view_tween().interpolate(context->alpha))) * model;
- float4x4 projection = camera.get_projection_tween().interpolate(context->alpha);
- float4x4 model_view_projection = projection * model_view;
-
- // Change shader program
- rasterizer->use_program(*shader_program);
-
- // Upload shader parameters
- if (model_view_projection_input)
- model_view_projection_input->upload(model_view_projection);
- if (sun_color_input)
- sun_color_input->upload(sun_color);
- if (sky_gradient_input)
- sky_gradient_input->upload(0, &sky_gradient[0], 4);
- if (mouse_input)
- mouse_input->upload(mouse_position);
- if (resolution_input)
- resolution_input->upload(resolution);
- if (time_input)
- time_input->upload(time);
- if (time_of_day_input)
- time_of_day_input->upload(time_of_day);
- if (blue_noise_map_input)
- blue_noise_map_input->upload(blue_noise_map);
- if (observer_coordinates_input)
- observer_coordinates_input->upload(observer_coordinates);
-
- if (sun_position_input)
- sun_position_input->upload(sun_position);
- if (sun_az_el_input)
- sun_az_el_input->upload(sun_az_el);
- if (moon_position_input)
- moon_position_input->upload(moon_position);
- if (moon_az_el_input)
- moon_az_el_input->upload(moon_az_el);
-
- // Draw sky model
- rasterizer->draw_arrays(*sky_model_vao, sky_model_drawing_mode, sky_model_start_index, sky_model_index_count);
- }
-
- void sky_pass::set_sky_model(const model* model)
- {
- sky_model = model;
-
- if (sky_model)
- {
- sky_model_vao = model->get_vertex_array();
-
- const std::vector<model_group*>& groups = *model->get_groups();
- for (model_group* group: groups)
- {
- sky_model_drawing_mode = group->get_drawing_mode();
- sky_model_start_index = group->get_start_index();
- sky_model_index_count = group->get_index_count();
- }
- }
- else
- {
- sky_model_vao = nullptr;
- }
- }
-
- void sky_pass::set_sun_color(const float3& color)
- {
- sun_color = color;
- }
-
- void sky_pass::set_sky_gradient(const std::array<float4, 4>& gradient)
- {
- sky_gradient = gradient;
- }
-
- void sky_pass::set_time_of_day(float time)
- {
- time_of_day = time;
- }
-
- void sky_pass::set_time_tween(const tween<double>* time)
- {
- this->time_tween = time;
- }
-
- void sky_pass::set_blue_noise_map(const texture_2d* texture)
- {
- blue_noise_map = texture;
- }
-
- void sky_pass::set_observer_coordinates(const float2& coordinates)
- {
- observer_coordinates = coordinates;
- }
-
- void sky_pass::set_sun_coordinates(const float3& position, const float2& az_el)
- {
- sun_position = position;
- sun_az_el = az_el;
- }
-
- void sky_pass::set_moon_coordinates(const float3& position, const float2& az_el)
- {
- moon_position = position;
- moon_az_el = az_el;
- }
-
- void sky_pass::handle_event(const mouse_moved_event& event)
- {
- mouse_position = {static_cast<float>(event.x), static_cast<float>(event.y)};
- }
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