Rescaling issue

[braice]

Hello

I found a bug in the handling of the max size in numpy2stl.py

When the condition is triggered on one dimension, all the scale values are changed at the same time instead of the dimension in question, meaning that lines like
xsize = facets[:, 3::3].ptp()
if xsize > max_width:
facets = facets * float(max_width) / xsize

should become

xsize = facets[:, 3::3].ptp()
if xsize > max_width:
    facets[:, 3::3] = facets[:, 3::3] * float(max_width) / xsize

Then it fixes the issue (with the proper indices)

Brice