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Stretches just part of an stl file

Project description

STL Stretch

This script lets you modify stl files by scaling them, including by scaling just a section along an axis.

Requirements:

  • Python 2.7+ including Python 3.x
  • Nose in order to run the tests

How does it work?

For example, let's say you have this file, but want it to be wider:

original

You coud scale it by a fixed amount through the whole way, but that will make the circles out of round, which you might need for screws or something else:

scale by 1.6 in x

To use this script, you need to find (or guess and iterate) on the coordinates the bound where you want to modify, for example to stretch between X=9 and X=15, the script divides it into 3 segments:

3 segments

The no-op change would be python stl.py --stretch "X 9 15 0" -o new.stl old.stl. Note the 0. If you want to expand this region by 7.5 units (typically mm by convention) then change the 0 to 7.5.

middle segment stretched

The resulting file is one without gaps, those are just for illustration.

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0.1

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