#include <metal_stdlib> using namespace metal; kernel void tint_symbol() { float3x3 m = float3x3(float3(1.0f, 2.0f, 3.0f), float3(4.0f, 5.0f, 6.0f), float3(7.0f, 8.0f, 9.0f)); m[1] = float3(5.0f, 5.0f, 5.0f); return; }