Equivalent to CGRectIntersectsRect

Question

Is there an equivalent to CGRectIntersectsRect that would be something more along the lines of points intersecting... I'm making a game and RectIntersectsRect works for what I want it to do but it looks bad because sometimes the corner of the one object will intersect the corner of the other and it will call the method, and you can barely see that the two objects touched, so it looks like it just glitches. Is there a CGPointIntersectsPoint or something along the lines of that? Thanks.

Answer 1

Try CGRectContainsPoint . If you want to just compare two points use CGPointEqualToPoint .

You can't really have a point intersecting another point as they're two exact points in space. The only way they can "intersect" is by being equal.

Answer 2

You can use CGRectContainsPoint to see if one of your rectangle contains a corner of the other, but you will get the same issue.

You can look for the intersection of the two rectangles using CGRectIntersection. It will give you an other CGRect, which represents the area in common from your two rectangles. From this rectangle, you can check width and height to see if the intersection is "big enough"

CGRect intersection = CGRectIntersection(rect1, rect2);
if (CGRectGetWidth(intersection) > kHorizontalThreshold || CGRectGetHeight (intersection) > kVerticalThreshold)
{
     // call your intersection method here
}