How big are the collision objects? If they're smaller missiles then can't the point of impact be the position of the missile as North suggests?
If they're larger objects (such as asteroids) you'll either have to use polygon collisions (which is quite advanced to find an impact point) or set a number of hotspot testing points around each object. It won't be exact but it should be close enough.
If they collision objects rotate or scale then you'll need to apply the same to the hotspots.
This might help.
If they're larger objects (such as asteroids) you'll either have to use polygon collisions (which is quite advanced to find an impact point) or set a number of hotspot testing points around each object. It won't be exact but it should be close enough.
If they collision objects rotate or scale then you'll need to apply the same to the hotspots.
This might help.