ShapeOp Python bindings
Recently, the Computer Graphics and Geometry Laboratory of EPFL released the ShapeOp library, which is “a header-only C++ library for static and dynamic geometry processing, using a unified framework for optimization under constraints“.
The process of creating Python bindings for the library is described in the official documentation. However, if you are on Mac and using a non-framework version of Python, such as one provided by macports, anaconda, homebrew …, you may need a few more instructions. I will describe the process for the macports version of Python.
First of all, make sure you have the following ports installed:
- cmake
- swig
- python-swig
- boost
- eigen
- eigen3
This will take some time, so go do something else while it is happening. Then proceed as instructed in the SahpeOp documentation:
1.$ mkdir build2.$ cd build3.$ cmake .. -DSWIG_PYTHON=TRUE4.$ makeFinally modify the link path of _shapeopPython.so using install_name_tool. You need to have the CommandLine Tools of XCode installed to do this, but if you got this far, i assume this is already taken care of.
First, check the current link path:
1.$ cd ./libShapeOp/bindings/python2.$ otool -L _shapeopPython.so3./System/Library/Frameworks/Python.framework/Versions/2.7/Python4./usr/lib/libc++.1.dylib5./usr/lib/libSystem.B.dylibThe first link should be changed. Therefore, do the following:
1.$ install_name_tool -change /System/Library/Frameworks/Python.framework/Versions/2.7/Python /opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/libpython2.7.dylib _shapeopPython.soAfter this, executing the runme.py file should return this output:
1.Input points:2.0.0 0.5 0.5 0.03.0.0 0.0 1.0 1.04.0.0 1.0 0.0 1.05.Output points:6.0.0 0.0 0.0 0.07.0.0 0.0 1.0 1.08.0.0 1.0 0.0 1.0