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Example of a DOTS Instancing shader that accesses per-instance data in URP

An example of accessing per-instance color data in a DOTS Instancing shader.
읽는 시간 1분최근 업데이트: 25일 전
In this example:
  • The metadata value for 
    Color
    is 
    0x80001000
    .
  • The instance index is 
    5
    .
  • Data for instance 0 starts at address 0x1000.
  • Data for instance 5 is at address 0x1000 + 5 * sizeof(float4) = 0x1050
Because the most significant bit is already set, the accessor macros don't load defaults. This means that 
c0
, 
c1
, and 
c2
will all have the same value, loaded from 
unity_DOTSInstanceData
address 
0x1050
.
void ExamplePerInstance(){    // rawMetadataValue will contain 0x80001000    uint rawMetadataValue = UNITY_DOTS_INSTANCED_METADATA_NAME(float4, Color);    float4 c0 = UNITY_ACCESS_DOTS_INSTANCED_PROP(float4, Color);    float4 c1 = UNITY_ACCESS_DOTS_INSTANCED_PROP_WITH_DEFAULT(float4, Color);    float4 c2 = UNITY_ACCESS_DOTS_INSTANCED_PROP_WITH_CUSTOM_DEFAULT(float4, Color, float4(1, 2, 3, 4));}