how to get the pixel coordinate of a collision ?

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Hi, I would like to address my problem more specifically.

I guess ImagesCollide() works is because it tests all the non-transparent pixel to see if there is an overlap between two images.
So if ImagesCollide() can detect this, it should be easily able to return the value of the coordinate of the overlapping pixels.
Certainly B+ did not provide this function, but it really nice if it can be done in new version.
I know in principle how to build up my own collision detection function. But I could imagine it will works much slow than ImagesCollide() because I think ImagesCollide() is best optimized.
I would like to perform multi-collision and reflection between objects, that's why I would like to know the pixel coordinate to determine cases. Is this a hard problem beyond a beginner ?

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