How do I check if an image point or coordinate has a certain object under it?

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  • I'm trying to do some point based collision and was wondering if there is a way to quickly check if 4 specific coordinate points have a sprite under it. For example, I have the point 400, 800, and want to check if that point overlaps a specific object.

    You could do this in code, obviously, but for efficiency's sake I am looking for a built in way.

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  • There is no "Is overlapping point" condition. However, you could probably create a single pixel collision "polygon" and do your test with this object. A caveat is that you need to move this object for every check you want to do.

  • Yes, that was one of my ideas but I wanted to avoid a solution which used a lot of coding, since I need to do it 4 times for 4 points (to check if an object is fully overlapped by another object) so I'll probably end up making a custom function or expression. Thanks for the reply!

  • There is no "Is overlapping point" condition.

    Actually, there is - "System pick overlapping point". 

    Variable counter=0
Repeat 4 times
 System pick Box overlapping point (Sprite.ImagePointX("Point"&loopindex), Sprite.ImagePointY("Point"&loopindex))
 	Add 1 to counter

If counter=4 
	Set text "All 4 boxes are correctly placed"

  • Weird that such a feature is under "System" and not a common condition like many other.

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