#include <GLUT/glut.h>		// OpenGL Utility Toolkit

void display(){
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);	// Clear the buffer
	for (int i=0; i<20;i++){				// Draw some random data
		glColor4f( (double)(i%3)/3.,			// Set the color (R,G,B,alpha)
			   (double)(i%2)/2.,
			   (double)(i)/10.,   0.2);
		glTranslatef(	0.04*(double)i-0.1,		// Translate the origin (x,y,z)
				0.004*(double)(i*i)-0.1, 0.);
		glutSolidSphere(0.05,32,32);			// Draw a sphere (radius, slices, stacks)
		glutWireCube(0.4);				// Draw a cube with size 0.4
	}
	glutSwapBuffers();
}

int main(int argc, char* argv[]){
	glutInit(&argc, argv);					// Initialise Glut
	glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
	glutInitWindowSize(700,700);				// Define and create window
	glutCreateWindow("PiTP OpenGL Demo");			
	glutDisplayFunc(display);				// Define drawing callback function
	glEnable(GL_BLEND);					// Enable transparancy
	glBlendFunc(GL_SRC_ALPHA, GL_ONE);
	glutMainLoop();						// Give control away
	return 0;
}