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Why are (m1+m2+m3+m4) multiplied by 2?


Locally, this looks a lot like the evaluation of a 2D convolution filter. Is there a way to represent a 3D geometry to evaluate these computations efficiently with a convolution filter?


@clairezb It's the weighting for the midpoints as defined by the method, which was somewhat-arbitrarily defined by aesthetics.

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