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9995549257
First step: intersect segment (p, p+growthvector) with surface elements
Second step: intersect segment with moved surface elements
TODO: Need mutual reduction of growthvector (not just taking one
intersection point)
IDEA: Take plane with segment, intersection point and
intersectionpoint-growthvector (need interpolation and barycentric
coordinates to get point on original surface element)
Then calculate in 2d how far one could go (depending on angle of two
growthvectors)