CUBE TOURNANT AVEC CAMERA MOVEMENT ET ECLAIRAGE

#include <windows.h>
#include <gl\glut.h>

// variable for camera Distance
float Distance = -30.0f;


//float g_LightPosition[] = {0, 10, (Distance)+30};
float g_bLight = true;	

typedef unsigned char uchar;

void RenderScene (void)
{
	// angle of revolution
	static float fElect1 = 0.0f;

	//clears screen with current clearing color
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

	//Loads Identity
	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();
	

	// variable for the z-axis in glTranslate 
	// controlled by the camera distance
	glTranslatef(0.0f, 0.0f, Distance);

	// Rotation controlled by variable (angle of revolution)
	glRotatef(fElect1, 1.0f, 0.0f, 0.0f);
	glRotatef(fElect1, 0.0f, 1.0f, 0.0f);

	glBegin(GL_QUADS);

		// Front face
		glColor3f(1.0f, 0.0f, 0.0f);
		glVertex3f(2.5f, 2.5f, 2.5f);

		glColor3f(0.0f, 1.0f, 0.0f);
		glVertex3f(2.5f, -2.5f, 2.5f);

		glColor3f(0.0f, 0.0f, 1.0f);
		glVertex3f(-2.5f, -2.5f, 2.5f);

		glColor3f(1.0f, 1.0f ,0.0f);
		glVertex3f(-2.5, 2.5f ,2.5f);

		// Back Face
		glColor3f(1.0f, 0.0f, 0.0f);
		glVertex3f(2.5f, 2.5f, -2.5f);

		glColor3f(0.0f, 1.0f, 0.0f);
		glVertex3f(2.5f, -2.5f, -2.5f);

		glColor3f(0.0f, 0.0f, 1.0f);
		glVertex3f(-2.5f, -2.5f, -2.5f);

		glColor3f(1.0f, 1.0f ,0.0f);
		glVertex3f(-2.5, 2.5f ,-2.5f);

		// Right-Side Face

		glColor3f(1.0f, 0.0f, 0.0f);
		glVertex3f(2.5f, 2.5f, 2.5f);

		glColor3f(0.0f, 1.0f, 0.0f);
		glVertex3f(2.5f, -2.5f, 2.5f);

		glColor3f(0.0f, 0.0f, 1.0f);
		glVertex3f(2.5f, -2.5, -2.5f);

		glColor3f(1.0f, 1.0f, 0.0f);
		glVertex3f(2.5f, 2.5f, -2.5f);

		//Left Face

		glColor3f(1.0f, 0.0f, 0.0f);
		glVertex3f(-2.5f, 2.5f, 2.5f);

		glColor3f(0.0f, 1.0f, 0.0f);
		glVertex3f(-2.5f, -2.5f, 2.5f);

		glColor3f(0.0f, 0.0f, 1.0f);
		glVertex3f(-2.5f, -2.5, -2.5f);

		glColor3f(1.0f, 1.0f, 0.0f);
		glVertex3f(-2.5f, 2.5f, -2.5f);

		// Top Face 
		glColor3f(1.0f, 0.0f, 0.0f);
		glVertex3f(2.5f, 2.5f, 2.5f);

		glColor3f(0.0f, 1.0f, 0.0f);
		glVertex3f(2.5f, 2.5f, -2.5f);

		glColor3f(0.0f, 0.0f, 1.0f);
		glVertex3f(-2.5f, 2.5f, -2.5);

		glColor3f(1.0f,1.0f, 0.0f);
		glVertex3f(-2.5f, 2.5f, 2.5f);

		//Bottom Face
		glColor3f(1.0f, 0.0f, 0.0f);
		glVertex3f(2.5f, -2.5f, 2.5f);

		glColor3f(0.0f, 1.0f, 0.0f);
		glVertex3f(2.5f, -2.5f, -2.5f);

		glColor3f(0.0f, 0.0f, 1.0f);
		glVertex3f(-2.5f, -2.5f, -2.5);

		glColor3f(1.0f,1.0f, 0.0f);
		glVertex3f(-2.5f, -2.5f, 2.5f);

	glEnd();

	// Rotate by 10 degrees
	fElect1 += 0.5f;


	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();

	// Swap the buffers
	glutSwapBuffers();

	// Update our scene
	glutPostRedisplay();

	
}

void SetupRC( void )
{
	// Clearing color
	glClearColor(0.0f, 0.0f, 0.0f, 0.0f);

	GLfloat ambient[] = {0.8f, 0.8f, 0.8f, 1.0f};

	// Enable depth test
	glEnable(GL_DEPTH_TEST);
	glEnable(  GL_LIGHTING );

	glLightModelfv( GL_LIGHT_MODEL_AMBIENT, ambient);	


	glEnable(GL_COLOR_MATERIAL);

	glColorMaterial(GL_FRONT,GL_AMBIENT_AND_DIFFUSE);

}

void ChangeSize (GLsizei w, GLsizei h)
{
	// Aspect ratio variable
	GLfloat fAspect = 0.0f;

	// prevent a divide by zero
	if ( h == 0 )
		h = 1;

	// Sets the viewport to window dimensions
	glViewport(0, 0, w, h);

	// calculates the aspect ration
	fAspect = (GLfloat)w / (GLfloat)h;

	
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();

	// Perspective with angle 70 degrees, aspect ration
	// Near and Far clip
	gluPerspective(70.0f, fAspect, 1.0f, 400.0f);

	glMatrixMode(GL_MODELVIEW);
	glLoadIdentity();
}

void OnKey( uchar Key, int X, int Y )
{
	// Key input for switching zoom IN/OUT
	switch( Key )
	{
		case 'i': case 'I':
		Distance += 1.0f;
		break;

		case 'o': case 'O':
		Distance -= 1.0f;
		break;
	}
}


void main (void)
{
	glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB );
	glutCreateWindow("Teapot");

	SetupRC();

	glutDisplayFunc(RenderScene);
	glutReshapeFunc(ChangeSize);
	glutKeyboardFunc(OnKey);

	glutMainLoop();

}