Looked around but don't see an easy way to do this. When adding a body to the world, is there a way to easily ask if that body is "on top" (colliding with) any existing body? Tried to process "collisionStart/End" but it looks like those happen only as bodies move around.

Two additions:

• To explain: I need to detect if an application drag/drop event, which normally would add a body to my world, would result in a colliding body. If so, I want to change its collisionFilter characteristics.
• I've studied the code in the MouseConstraint and think it will work for me with some modification.

So comments would be welcome, otherwise you can close this issue. Thanks.