point p[] = new point[150];
double v1x[] = new double[p.length];
double v1y[] = new double[p.length];
double v2x[] = new double[p.length];
double v2y[] = new double[p.length];
double hx[] = new double[p.length];
double hy[] = new double[p.length];
int pcur, vpcur;
boolean mouseP;
boolean moving;
double dist, dire;

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[setup, 600, 600]{
	for(int i = 0; i < p.length; i++){
		p[i] = point(-500, -500);
		hx[i] = p[i].x;
		hy[i] = p[i].y;
		v1x[i] = 0.;
		v1y[i] = 0.;
		v2x[i] = 0.;
		v2y[i] = 0.;
	}
	pcur = 0;
	vpcur = 0;	
	mouseP = false;
	setBackColor(255, 255, 255);
	moving = false;
}

[paint]{
		clearAll();
		setColor(0, 0, 0);
		if(0 < pcur){
			for(int i = 1; i <  pcur; i ++){
				drawBezierCurve(p[i-1].x, p[i-1].y, p[i-1].x + v2x[i-1], p[i-1].y + v2y[i-1], p[i].x + v1x[i], p[i].y + v1y[i], p[i].x, p[i].y);
			}
		}
		if(moving == false && mouseP == true){
			for(int i = 0; i < pcur; i++){
				drawOval(p[i].x-5, p[i].y-5, 10, 10);
			}
			for(int i = 0; i <= vpcur; i ++){
				drawRect(p[i].x + v1x[i] - 5, p[i].y + v1y[i] - 5, 10, 10);
				drawRect(p[i].x + v2x[i] - 5, p[i].y + v2y[i] - 5, 10, 10);
				drawLine(p[i].x, p[i].y, p[i].x + v1x[i], p[i].y + v1y[i]);
				drawLine(p[i].x, p[i].y, p[i].x + v2x[i], p[i].y + v2y[i]);
			}
		}
}

[always]{
	if(moving == false &&mouseP == true){
		v2x[vpcur] = mouseX - p[vpcur].x;
		v2y[vpcur] = mouseY - p[vpcur].y;
		v1x[vpcur] = -v2x[vpcur];
		v1y[vpcur] = -v2y[vpcur];
	}
	if(moving == true){
		for(int i = 0; i < pcur; i++){
			dist = p[i].distanceTo(hx[i], hy[i]);
			dire = p[i].directionTo(hx[i], hy[i]);
			p[i].push(dist, dire);
			if(mouseP == true){
				dist = p[i].distanceTo(mouse);
				dire = p[i].directionTo(mouse);
				if(100 < dist)	dist = 100;
				p[i].push(dist, dire);
			}else{
				dist = mouse.distanceTo(p[i]);
				dire = mouse.directionTo(p[i]);
				if(600 < dist)	dist = 600; 
				p[i].push((600 - dist)/6., dire);
			}
		}
	}
}

[mousePressed]{
	mouseP =true;
	if(moving == false && pcur < p.length){
		p[pcur].x = mouseX;
		p[pcur].y = mouseY;
		hx[pcur] = p[pcur].x;
		hy[pcur] = p[pcur].y;
		v1x[pcur] =0.;
		v1y[pcur] =0.;
		v2x[pcur] =0.;
		v2y[pcur] =0.;
		pcur ++;
	}
}

[mouseReleased]{
	mouseP = false;
	if(moving == false){
		vpcur ++;
	}
}

[keyPressed]{
	if(theKey == 's'){
		if(moving ==false){
			moving = true;
		}else{
			moving = false;
		}
	}
}