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[Tapadi <>]

Hi again,

Indeed a linear interpolation is way better than the constant approximation,
though the formulas are a bit  trickier to implement. 

Instead of "value of the density at triangle's center" x "area of the
triangle", you can compute the volume between 1. the triangle whose each
vertice receives a z-coordinate equal to its density value and 2. the z = 0
plane.

Note that you can in all cases gain precision with the max area condition
and the derivative computation.

Best regards,
Hugo Loi
PhD student at Inria - Maverick team



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