#include "stdafx.h"

#include "Callbacks.h"
#include "Structures.h"
#include "AuxObjects.h"

/************************************************************************/
/*                    Structures and definitions                        */
/************************************************************************/

// 3d objects
Coordinates coordinates;
Grid grid;
Prism prism;

// Defined in Callbacks.cpp
extern winsz WindowSize;	                                            
extern bool cameraRotation;												
extern double cameraAngleX;												
extern void setProjectionMatrix(void);		

/************************************************************************/
/*                             Aux. stuff                               */
/************************************************************************/

// Initializing scene before using it
void init_scene(GLFWwindow* window)
{
	resize_callback(window, WindowSize.Width, WindowSize.Height);
}


/************************************************************************/
/*                              Drawing                                 */
/************************************************************************/
void render_scene(void)
{
	// Perform camera rotation ("R" key)
	if (cameraRotation == true)
	{
		cameraAngleX += 0.1;
		setProjectionMatrix();
	}

	// Select & reset the modelview matrix
	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();

	// Drawing coordinates, grid & light
	coordinates.draw(4);
	grid.draw(10, 1);

	// Build and draw prism
	prism.build(6);
	prism.draw();

} 
   

int main(int argc, char* argv[]) 
{ 
	GLFWwindow* window;
	std::cout << WindowSize.Width << ", " << WindowSize.Height << std::endl;
	
	// Init GLFW
    if(!glfwInit()) 
    { 
        printf("glfwInit failed\n"); 
        return -1; 
    } 
   
	// Trying to create window
    glfwSetErrorCallback(error_callback); 
	window = glfwCreateWindow(WindowSize.Width, WindowSize.Height, "Test app", NULL, NULL);
    if (window == NULL) 
    { 
        printf("glfwOpenWindow failed. Can your hardware handle OpenGL 3.2?\n"); 
        glfwTerminate(); 
        return -2; 
    } 
   
    int attrib; 
    attrib = glfwGetWindowAttrib(window, GLFW_CONTEXT_VERSION_MAJOR); 
    attrib = glfwGetWindowAttrib(window, GLFW_CONTEXT_VERSION_MINOR); 
    attrib = glfwGetWindowAttrib(window, GLFW_OPENGL_PROFILE); 
   
	// Creating context
    glfwMakeContextCurrent(window); 
   
	// Setting up callbacks
	glfwSetKeyCallback(window, keyboard_callback);
	glfwSetFramebufferSizeCallback(window, resize_callback);
	glfwSetMouseButtonCallback(window, mouse_callback);
	glfwSetCursorPosCallback(window, cursor_callback);
	glfwSetScrollCallback(window, wheel_callback);


	// Initialization
	init_scene(window);
   
	// Main loop
    while (!glfwWindowShouldClose(window)) 
    { 
        render_scene(); 
   
		glfwSwapBuffers(window);
		glClearColor(0, 0, 0, 0);
		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

		glfwPollEvents();
    } 
   
    glfwDestroyWindow(window); 
   
    // clean up and exit 
    glfwTerminate(); 
   
    return 0; 
}