asw-render-pipelines-universal/Editor/ShaderGraph/Includes/OculusMotionVectors.hlsl

#ifndef SG_MOTION_VECTORS_INCLUDED
#define SG_MOTION_VECTORS_INCLUDED

PackedVaryings vert(Attributes input)
{
    Varyings output = (Varyings)0;
    output = BuildVaryings(input);
    PackedVaryings packedOutput = (PackedVaryings)0;
    packedOutput = PackVaryings(output);
    return packedOutput;
}

half4 frag(PackedVaryings packedInput) : SV_TARGET
{
    Varyings unpacked = UnpackVaryings(packedInput);
    UNITY_SETUP_INSTANCE_ID(unpacked);

    float3 screenPos = unpacked.curPositionCS.xyz / unpacked.curPositionCS.w;
    float3 screenPosPrev = unpacked.prevPositionCS.xyz / unpacked.prevPositionCS.w;
    half4 color = (1);
    color.xyz = screenPos - screenPosPrev;

    return color;
}
#endif