CollapseMode

Controls the method used when selecting the position the results from an edge collapse.

some of the simpler methods (such as average) may be significantly slower as they result in many more points that are rejected because the would cause a triangle flip. MinimalQuadricPositionError Try to find position for collapsed vertices that minimizes quadric error. If false we just use midpoints, which is actually significantly slower, because it results in many more points that would cause a triangle flip, which are then rejected.

MinimalExistingVertexError Use one of the existing vertex position with smallest error for the collapse point.

AverageVertexPosition Use the midpoint of the two vertex positions.