[Merged by Bors] - perf: only recalculate frusta of changed lights #4086
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## Objective Currently, all directional and point lights have their viewing frusta recalculated every frame, even if they have not moved or been disabled/enabled. ## Solution The relevant systems now make use of change detection to only update those lights whose viewing frusta may have changed.
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## Objective Currently, all directional and point lights have their viewing frusta recalculated every frame, even if they have not moved or been disabled/enabled. ## Solution The relevant systems now make use of change detection to only update those lights whose viewing frusta may have changed.
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## Objective Currently, all directional and point lights have their viewing frusta recalculated every frame, even if they have not moved or been disabled/enabled. ## Solution The relevant systems now make use of change detection to only update those lights whose viewing frusta may have changed.
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Objective
Currently, all directional and point lights have their viewing frusta recalculated every frame, even if they have not moved or been disabled/enabled.
Solution
The relevant systems now make use of change detection to only update those lights whose viewing frusta may have changed.