Making Light Collide With Tile Map

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Hello everyone!


I am currently making a game which you can find here:


As of right now, if the player stands underneath a platform, the light allows the player to see what is above that said platform. Is there any way to make the light collide with the tilemap so the player can only see what is the below the platform? For example, if the player is standing underneath a platform that has spikes, he should not be able to see the spikes above him as there is a ceiling that blocks the light from getting across.


The lighting that I am using comes from the source code that can be found here:


Thanks in advance.

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