BatchedMesh: Store draw ranges for use with multi draw support #27109
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This was referenced Nov 7, 2023
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Related issue: #22376
Description
Adds storage of the "drawRange" for each geometry to the BatchedMesh and updates it on change in preparation for multidraw support. Also updates some variable names to reduce conflict (
reservedRangeanddrawRange) and addsisBatchedMeshfield.Next I will add support for the multi draw extension. The list of ranges for use with the API will be able to be generated, sorted, and filtered in the "onBeforeRender" callback.