How to calculate sun and camera angle?

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:bust_in_silhouette: Asked By JulioYagami

I want to know if the player (Camera) is watching to the sun directly.

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:bust_in_silhouette: Reply From: reimgrab

You need at least the forward vector of the camera and a position and dimension of your sun.
Then you could model the sun (mathematically) as a sphere and do a ray-sphere intersection test.