Shader3DPlane.metal

struct ModelConstants {
    simd_float4x4 modelMatrix;
}

vertex VertexOut vertex_main(uint vertexID [[vertex_id]],
     constant VertexIn *vertices [[buffer(0)]],
     constant ModelConstants &modelConstants [[buffer(1)]],
     constant SceneConstants &sceneConstants [[buffer(2)]]) {
    VertexIn in = vertices[vertexID];
    VertexOut out;
  
    out.position = modelConstants.modelMatrix * in.position;
    out.color = in.color;
    return out;
}