ShaderWithCamera.metal

struct SceneConstants {
    simd_float4x4 viewMatrix;
    simd_float4x4 projection;
};

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 = sceneConstants.projection 
     * sceneConstants.viewMatrix 
     * modelConstants.modelMatrix 
     * in.position;
    out.color = x.color;
    
    return out;
}