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/**
* @file render.hpp
* Handles all in game rendering
*
* Copyright (C) 2019 Clyne Sullivan
* Copyright (C) 2019 Belle-Isle, Andrew <drumsetmonkey@gmail.com>
*
* This program 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.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef SYSTEM_RENDER_HPP_
#define SYSTEM_RENDER_HPP_
#include <entityx/entityx.h>
#include <GL/glew.h>
#include <SDL2/SDL.h>
#include <SDL2/SDL_opengl.h>
#define GLM_FORCE_RADIANS
#include <glm/glm.hpp>
#include <glm/gtc/matrix_transform.hpp>
#include <glm/gtc/type_ptr.hpp>
#include <glm/gtc/noise.hpp>
#include "shader.hpp"
#include "world.hpp"
#include "components/Player.hpp"
#include "events/render.hpp"
#include <map>
struct UIRenderData
{
GLuint tex;
GLuint normal;
unsigned int vertex;
UIRenderData(GLuint _tex, GLuint _normal, unsigned int _vertex) :
tex(_tex), normal(_normal), vertex(_vertex) {}
};
struct WorldRenderData
{
GLuint tex;
GLuint normal;
unsigned int vertex;
WorldRenderData(GLuint _tex, GLuint _normal, unsigned int _vertex) :
tex(_tex), normal(_normal), vertex(_vertex) {}
};
class RenderSystem : public entityx::System<RenderSystem>,
public entityx::Receiver<RenderSystem>
{
private:
std::string title;
int width;
int height;
std::unique_ptr<SDL_Window, void (*)(SDL_Window *)> window;
SDL_GLContext context;
Shader worldShader;
Shader uiShader;
glm::vec3 camPos;
// Map of VBOs and their render data
std::map<GLuint, UIRenderData> uiRenders;
std::map<GLuint, WorldRenderData> worldRenders;
entityx::Entity player; // Save the player so we can track the camera
public:
RenderSystem() :
window(nullptr, SDL_DestroyWindow) {}
~RenderSystem()
{
SDL_GL_DeleteContext(context);
SDL_Quit();
}
/**
* Prepares the system for running.
*/
void configure(entityx::EntityManager& entities,
entityx::EventManager& events) final;
/**
* Updates the render system.
*/
void update(entityx::EntityManager& entities,
entityx::EventManager& events,
entityx::TimeDelta dt) final;
/**
* Initializes the rendering system
* @return Zero on success, non-zero on error
*/
int init();
glm::vec3 getCameraPosition() const {
return camPos;
}
Position uiToWorldCoord(float x, float y) const;
/**
* Returns the width of the camera's view in world coordinates.
*/
float getWorldViewWidth() const;
/**
* Returns the height of the camera's view in world coordinates.
*/
float getWorldViewHeight() const;
/************
* EVENTS *
************/
void receive(const WorldMeshUpdateEvent &wmu);
void receive(const NewRenderEvent &nre);
void receive(const DelRenderEvent &dre);
void receive(const entityx::ComponentAddedEvent<Player> &cae);
};
#endif // SYSTEM_RENDER_HPP_
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