Evolution 1.1 Main Loop

main.cpp

int main(int argc, char** argv) {
    /* INITIALIZATION */
    g_renderSystem = new RenderSystem();
    g_renderSystem->Initialize();
    
    g_renderSystem->CreateWindow(800, 600, "Evolution", false);
    
    /* START CODE TO CREATE TRIANGLE - THIS WILL HAPPEN IN A LOADER LATER */
    
    // Let's create our first renderable entity
    Entity* entity = new Entity();
    Renderable* renderable = new Renderable();
    entity->AddComponent(renderable);
    
    // Load the simple colour shader
    ShaderLoader* loader = ShaderLoader::GetInstance();
    renderable->program = loader->Load("resources/shaders/simple_colour");
    
    // Create a vertex attribute object to store our buffers, attributes, data pointers, etc.
    glGenVertexArrays(1, &renderable->vertexAttribObject);
    glBindVertexArray(renderable->vertexAttribObject);
    
    // Populate our vertex buffer
    glGenBuffers(1, &renderable->vertexBuffer);
    float vertices[] = {
        0.0f, 0.5f, -1.0f, 1.0f, 0.0f, 0.0f,
        -0.5f, -0.5f, -1.0f, 0.0f, 1.0f, 0.0f,
        0.5f, -0.5f, -1.0f, 0.0f, 0.0f, 1.0f
    };
    glBindBuffer(GL_ARRAY_BUFFER, renderable->vertexBuffer);
    glBufferData(GL_ARRAY_BUFFER, sizeof(float) * 18, vertices, GL_STATIC_DRAW);
    
    // Set up our vertex description
    glEnableVertexAttribArray(0);
    glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, sizeof(float) * 6, (void*)0);
    glEnableVertexAttribArray(1);
    glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, sizeof(float) * 6, (void*)(sizeof(float) * 3));
    
    // Save the number of triangles
    renderable->numTriangles = 1;
    
    glBindVertexArray(0);
    
    // Add our triangle to the render system
    g_renderSystem->AddComponent(renderable);
    
    /* END MANUAL TRIANGLE CODE */
    
    /* MAIN LOOP */
    while(!glfwWindowShouldClose(g_renderSystem->GetWindow())) {
        // Update our render system
        g_renderSystem->Update(0);
        
        // Poll for and process events
        glfwPollEvents();
        
        usleep(1);
    }
    
    /* SHUT DOWN */
    g_renderSystem->Shutdown();
    
    return(0);
}