#include <stdlib.h>

#include "camera_gl.h"

#include "bezier.h"



#include <GL/glut.h>

static GLint Height;		/*height of window*/

static Camera_GL *TheCamera;


static Point3D P[4][4] = 
	{{{-2.500, -2.500, 0.002},{-2.500, -1.250,0.020},{-2.500, 0.000, 0.044},{-2.500, 1.250, 0.020}},
	 {{-1.250, -2.500, 0.020},{-1.250, -1.250, 0.210},{-1.250, 0.000, 0.458},{-1.250,1.250, 0.210}},
	 {{0.000, -2.500, 0.044},{0.000, -1.250, 0.458},{0.000, 0.000, 1.000},{0.000,1.250, 0.458}},
	 {{1.250, -2.500, 0.020},{1.250, -1.250, 0.210},{1.250, 0.000, 0.458},{1.250,1.250, 0.210}}};
                      

static void display ()
{
    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
    glColor3f(0.0,0.0,0.0);
    displayBezier(P);
    glFlush();
}
 
 
static void reshape(int width, int height)
{ 	
	setCOP_GL(TheCamera,0.0,0.0,-6.0);
	setClipPlanes_GL(TheCamera,-5.9,200.0);
	setVPWindow_GL(TheCamera,-4.0,4.0,-0.5,0.75);

	clickProject_GL(TheCamera);
	
    	glViewport (0, 0, width, height); /*define the viewport*/
}
	
static void initialise(void) 
{

	/*GL_FLAT or GL_SMOOTH*/	
    	glShadeModel(GL_FLAT);
    
    	/*set the background (clear) Color to white*/
    	glClearColor(1.0,1.0,1.0,0.0);
	
	glEnable(GL_DEPTH_TEST);
	
    	/*set the depth buffer for clearing*/
    	glClearDepth(1.0);
 	
	/*initialise the camera*/
	TheCamera = newCamera_GL();
	setVRP_GL(TheCamera,0.0,0.0,0.0);
	setVPN_GL(TheCamera,1.0,1.0,-0.05);
	setVUV_GL(TheCamera,0.0,0.0,1.0);
	
	clickView_GL(TheCamera);
}

int main(int argc, char** argv)
{	
	int window;

	glutInit(&argc,argv);
	
	/*record the window height*/
	Height = 500;
	
	glutInitWindowSize(Height,Height);

	glutInitDisplayMode(GLUT_RGBA|GLUT_DEPTH);

	window = glutCreateWindow("Bezier");
	
	
	glutSetWindow(window);

    	initialise();

	/*register callbacks*/
	glutDisplayFunc(display); /*display function*/
	glutReshapeFunc(reshape);

	glutMainLoop();
}