MTLStepFunction.perInstance The function fetches data based on the instance index. Declarationcase perInstance See AlsoStep optionsMTLStepFunction.constantMTLStepFunction.perPatchMTLStepFunction.perPatchControlPointMTLStepFunction.perVertexMTLStepFunction.threadPositionInGridXMTLStepFunction.threadPositionInGridYMTLStepFunction.threadPositionInGridXIndexedMTLStepFunction.threadPositionInGridYIndexed