#main.cpp

#include <GL/glut.h>

#include "camera.h"
#include "track.h"

Camera camera; 							// Create a camera for viewing		
Track track;	// Create the track with length 1000m, and parameters b,c,d

void display()
{
	glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );

	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();
	camera.createModelViewMatrix();

	glViewport(0, 0, 1280, 800);
	track.draw();

	glFlush();
	glutSwapBuffers();
}

void reshape(int w, int h)
{
    glViewport(0, 0, w, h);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
	camera.createViewVolume(40.0f, (GLfloat) w / (GLfloat) h, 0.5f, 50.0f); // angle,aspect,near,far
	glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
	camera.createModelViewMatrix();
}

void init()
{
	glEnable(GL_DEPTH_TEST); 					// Use removing of hidden surfaces
	glEnable(GL_NORMALIZE);  					// Normalize vectors

	camera.create(0, 0, 10, 0, 0, 0, 0, 1, 0); 	
	camera.slide(0.0, -9.0, -2.0);
	camera.pitch(-40.0);
}

int main(int argc, char **argv)
{
	glutInit(&argc, argv);
	glutInitDisplayMode( GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH );
	glutInitWindowSize(1280,800);
	glutInitWindowPosition(100,50);
	glutCreateWindow("Øving 6 - Racetrack");
	glutDisplayFunc(display);
	glutReshapeFunc(reshape);
	init();
	glutMainLoop();
	return 0;
}

#track.h

#ifndef __track_h__
#define __track_h__

class Track
{
	public:
		Track();
		void draw();
		void loadTextures();
	private:
		GLuint texture;
};

#endif

#track.cpp
#include <GL/glut.h>
#include "util_graphics.h"
#include <cstdlib>
#include "track.h"

Track::Track() {
	loadTextures();
}

void Track::loadTextures()
{
	unsigned char* data;
	unsigned int width;
	unsigned int height;
	unsigned int components;

	glEnable( GL_TEXTURE_2D );
	glGenTextures( 1, &texture );

	glBindTexture( GL_TEXTURE_2D, texture );
	data = loadJPEG("textures/road.jpg", &width,&height,&components);
	gluBuild2DMipmaps( GL_TEXTURE_2D, GL_RGB, width, height, GL_RGB, GL_UNSIGNED_BYTE, data);
	free(data);
}

void Track::draw()
{
		glEnable( GL_TEXTURE_2D );
		glBindTexture( GL_TEXTURE_2D, texture );
		glBegin(GL_POLYGON);
		glNormal3f(0,0,1);
			glTexCoord2i(0,0);
			glVertex3i(0,0,0);
			glTexCoord2i(0,1);
			glVertex3i(0,1,0);
			glTexCoord2i(1,0);
			glVertex3i(1,1,0);
			glTexCoord2i(1,1);
			glVertex3i(1,0,0);
		glEnd();
		glDisable( GL_TEXTURE_2D );
}