#include <glut.h>
#include <stdlib.h>
#include "Vector2D.h"

int w = 600;
int h = 600;
int n = 100000;
int pickpt = 0;
Vector2D p[3], P;

void init(){
	glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
	glClearColor(1.0, 1.0, 1.0, 0.0);
	glColor3f(0.0, 0.0, 0.0);
}

void display(){
	glClear(GL_COLOR_BUFFER_BIT);
	for(int i=0; i<n; ++i){
		pickpt = (int)rand() % 3;
		P = 0.5*(P+p[pickpt]);
		glBegin(GL_POINTS);
			glVertex3f(P.x(), P.y(), 0.0);
		glEnd();
	}
	glFlush();
}

int main(int argc, char** argv){
	p[0].setXY(0, 0);
	p[1].setXY(1, 0);
	p[2].setXY(0.5, 1);
	P = p[0];

	glutInit(&argc, argv);
	glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB);
	glutInitWindowSize(w, h);
	glutInitWindowPosition(100,100);
	glutCreateWindow("Aufgabe7: Sierpinski");
	init();
	glClear(GL_COLOR_BUFFER_BIT);
	glutDisplayFunc(display);
	glutMainLoop();
	return 0;
}