Drawing Touch Points With Cocos2d

I’ve been experimenting with cocos2d for iOS development and made a very simple program that grabs the touch locations on the screen and draws the points. It uses a C++ vector to store the CGPoint primitives and the draw: message takes care of drawing them, whenever we fill the vector with points.
Here’s the draw:

static std::vectorpoints;
...

-(void) draw {
...
	// Draw points
	glPointSize(4);
	for (int i = 0; i < points.size(); i++) {
		glColor4ub(0,255,0,255); // Green
		CGPoint p = points.at(i);
		ccDrawPoint(p);
		
		glColor4ub(255,255,255,255); // White
		CGPoint *vertices = &points[0]; // Vector to array
		ccDrawPoly(vertices, points.size(), NO);
	}
...
}

And here’s how the points are captured:

- (void)ccTouchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch *myTouch = [touches anyObject];
    CGPoint location = [myTouch locationInView:[myTouch view]];
    location = [[CCDirector sharedDirector] convertToGL:location];
    b2Vec2 locationWorld = b2Vec2(location.x/PTM_RATIO, location.y/PTM_RATIO);
	
	NSLog(@"TOUCH BEGIN %f %f", location.x, location.y);
	
	points.clear();
	points.push_back(location);
}

-(void)ccTouchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch *myTouch = [touches anyObject];
    CGPoint location = [myTouch locationInView:[myTouch view]];
    location = [[CCDirector sharedDirector] convertToGL:location];
    b2Vec2 locationWorld = b2Vec2(location.x/PTM_RATIO, location.y/PTM_RATIO);
    
	points.push_back(location);
}

-(void)ccTouchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event {
    points.clear();
}

- (void)ccTouchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
	UITouch *myTouch = [touches anyObject];
    CGPoint location = [myTouch locationInView:[myTouch view]];
    location = [[CCDirector sharedDirector] convertToGL:location];
    b2Vec2 locationWorld = b2Vec2(location.x/PTM_RATIO, location.y/PTM_RATIO);
	
    NSLog(@"TOUCH END %f %f", location.x, location.y);
	
	for (int i = 0; i < points.size(); i++) {
		CGPoint p = points.at(i);
		NSLog(@" TOUCH @ %f %f", p.x, p.y);
	}
}

Download Xcode Project