It is possible to detect when a body is under light? ( Collision with the light and a body )
How I check this with libgdx?
Sorry for my english...
Solution
It could be easy to implements with raycasting :
With a point light, you have to perform a raycast from your body object to the light object, if the first returned body is the light then your object is under light.
With a directional (infinite) light you have to raycast from your object body toward light direction opposite, if raycast not returning bodies then your object is under light.
With Cone lights, it's the same as point lights but you also need to check angle with that light.
Notes :
If your object body is big, you may perform multiple raycasts (from different positions).
If you have multiple lights, you need to perform multiple raycasts as well.