#include "SceneOpenGl.h"

SceneOpenGL::SceneOpenGL(SDL_Window* window) {
    if (window == NULL) {
        throw new SceneOpenGLException();
    }
    // Engine
    this->window = window;
    // Tools
    this->fps = new FPSCount();
    this->input = new Input();
    // Scene
    this->run = false;

    int w, h;
    SDL_GetWindowSize(window, &w, &h);
    this->projection = glm::perspective(70.0, (double)(w/h), 1.0, 100.0);
    this->modelview = glm::mat4(1.0);
}


SceneOpenGL::~SceneOpenGL()
{
    delete fps;
    delete input;
}

void SceneOpenGL::start() {
    run = true;

    // Test en attendant ObjectGL.show() //
    float vertices[] = { -0.5, -0.5,   0.0, 0.5,   0.5, -0.5 };
    // /Test //

    while (run) {
        // FPS flag
        if (fps->flag()) {
            std::cout << "FPS : " << fps->getFps() << std::endl;
        }

        // Input check/actions
        input->updateEvents();
        if (input->isKeyPush(SDL_SCANCODE_ESCAPE)) {
            run = false;
        }

        // Cleaning last frame
        glClear(GL_COLOR_BUFFER_BIT);

        // Test en attendant ObjectGL.show() //
        glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, vertices);
        glEnableVertexAttribArray(0);
        glDrawArrays(GL_TRIANGLES, 0, 3);
        glDisableVertexAttribArray(0);
        // /Test //

        // FPS add frame
        fps->addFrame();

        // Rendering
        SDL_GL_SwapWindow(window);
    }
}