AnimatingWobblingPlaneShader.metal

struct SceneConstants {
    ...
    float t;
};

vertex VertexOut vertex_main(uint vertexID [[vertex_id]],
     constant VertexIn *vertices [[buffer(0)]],
     constant ModelConstants &modelConstants [[buffer(1)]],
     constant SceneConstants &sceneConstants [[buffer(2)]]) {
    
    ...
    float distortion = 0.75 * cnoise(0.43 * position * noiseDencity + sceneConstants.t);
    ...
    
    return out;
}