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Add Scene3d.shadowIf #78

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ianmackenzie opened this issue Apr 28, 2020 · 0 comments

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ianmackenzie commented Apr 28, 2020

Useful optimization, allows objects to cast shadows only from a subset of lights:

Scene3d.shadowIf : 
    (Light coordinates Bool -> Bool) 
    -> Shadow coordinates 
    -> Entity coordinates

The callback will be called with every shadow-casting light to check if a shadow should actually be cast for the given object.

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