def v3dist(pt1, pt2):
    d = pt1 - pt2
    return math.sqrt(d[0]*d[0] + d[1]*d[1] + d[2]*d[2])
Calculates the distance between two 3d points element-wise
dataset/ETHPy150Open pycollada/meshtool/meshtool/filters/simplify_filters/sander_simplify.py/v3dist