antkeeper
/
source


								/*

								 * Copyright (C) 2021  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/>.

								 */


								#ifndef ANTKEEPER_MATERIAL_PASS_HPP

								#define ANTKEEPER_MATERIAL_PASS_HPP


								#include "renderer/render-pass.hpp"

								#include "renderer/material.hpp"

								#include "animation/tween.hpp"

								#include "utility/fundamental-types.hpp"

								#include "event/event-handler.hpp"

								#include "event/input-events.hpp"

								#include <unordered_map>

								#include "gl/shader-program.hpp"

								#include "gl/shader-input.hpp"

								#include "gl/texture-2d.hpp"


								class camera;

								class resource_manager;

								class shadow_map_pass;


								/**

								 * Renders scene objects using their material-specified shaders and properties.

								 */

								class material_pass: public render_pass,

									public event_handler<mouse_moved_event>

								{

								public:

									material_pass(gl::rasterizer* rasterizer, const gl::framebuffer* framebuffer, resource_manager* resource_manager);

									virtual ~material_pass();

									virtual void render(render_context* context) const final;


									/// Sets the material to be used when a render operation is missing a material. If no fallback material is specified, render operations without materials will not be processed.

									void set_fallback_material(const material* fallback);


									/// Sets the time tween, which is interpolated between updates

									void set_time_tween(const tween<double>* time);


									void set_focal_point_tween(const tween<float3>* focal_point);


									const ::shadow_map_pass* shadow_map_pass;

									const gl::texture_2d* shadow_map;


								private:

									virtual void handle_event(const mouse_moved_event& event);


									/**

									 * Sets of known shader input parameters. Each time a new shader is encountered, a parameter set will be created and its inputs connected to the shader program. A null input indiciates that the shader doesn't have that parameter.

									 */

									struct parameter_set

									{

										const gl::shader_input* time;

										const gl::shader_input* mouse;

										const gl::shader_input* resolution;

										const gl::shader_input* camera_position;

										const gl::shader_input* camera_exposure;

										const gl::shader_input* model;

										const gl::shader_input* view;

										const gl::shader_input* projection;

										const gl::shader_input* model_view;

										const gl::shader_input* view_projection;

										const gl::shader_input* model_view_projection;

										const gl::shader_input* normal_model;

										const gl::shader_input* normal_model_view;

										const gl::shader_input* clip_depth;

										const gl::shader_input* log_depth_coef;


										const gl::shader_input* ambient_light_count;

										const gl::shader_input* ambient_light_colors;

										const gl::shader_input* point_light_count;

										const gl::shader_input* point_light_colors;

										const gl::shader_input* point_light_positions;

										const gl::shader_input* point_light_attenuations;

										const gl::shader_input* directional_light_count;

										const gl::shader_input* directional_light_colors;

										const gl::shader_input* directional_light_directions;

										const gl::shader_input* directional_light_textures;

										const gl::shader_input* directional_light_texture_matrices;

										const gl::shader_input* directional_light_texture_opacities;

										const gl::shader_input* spot_light_count;

										const gl::shader_input* spot_light_colors;

										const gl::shader_input* spot_light_positions;

										const gl::shader_input* spot_light_directions;

										const gl::shader_input* spot_light_attenuations;

										const gl::shader_input* spot_light_cutoffs;


										const gl::shader_input* focal_point;


										const gl::shader_input* shadow_map_directional;

										const gl::shader_input* shadow_splits_directional;

										const gl::shader_input* shadow_matrices_directional;

									};


									const parameter_set* load_parameter_set(const gl::shader_program* program) const;


									mutable std::unordered_map<const gl::shader_program*, parameter_set*> parameter_sets;

									const material* fallback_material;

									const tween<double>* time_tween;

									float2 mouse_position;

									const tween<float3>* focal_point_tween;


									int max_ambient_light_count;

									int max_point_light_count;

									int max_directional_light_count;

									int max_spot_light_count;


									mutable int ambient_light_count;

									mutable int point_light_count;

									mutable int directional_light_count;

									mutable int spot_light_count;


									float3* ambient_light_colors;

									float3* point_light_colors;

									float3* point_light_positions;

									float3* point_light_attenuations;

									float3* directional_light_colors;

									float3* directional_light_directions;

									const gl::texture_2d** directional_light_textures;

									float4x4* directional_light_texture_matrices;

									float* directional_light_texture_opacities;

									float3* spot_light_colors;

									float3* spot_light_positions;

									float3* spot_light_directions;

									float3* spot_light_attenuations;

									float2* spot_light_cutoffs;

								};


								#endif // ANTKEEPER_MATERIAL_PASS_HPP