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Scott Alford committed Sep 7, 2020
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# VTK for QtPyVCP on Raspberry Pi

QtPyVCP utilises VTK to provide GCode back plot functionality. Unfortunately there is no pip package for VTK and the normal installation of QtPyVCP fails. Below is the procedure using the development installation instructions with some adjustmentsto to use a specifically compiled version of VTK 7.1.1 with Qt5 and Python 2 wrapping.
QtPyVCP utilises VTK to provide GCode back plot functionality. Unfortunately there is no pip package for VTK and the normal installation of QtPyVCP fails. Below is the procedure using the development installation instructions with some adjustmentsto to use a specifically compiled version of VTK 7.1.1 with Qt5 and Python 2 wrapping. The key to being able to build VTK with OpenGL "legacy" is to install ```libopengl-dev``` and configure with ```VTK_RENDERING_BACKEND:STRING=OpenGL``` not OpenGL2 which tries to use later versions of OpenGL that are currently not supported on the RPi.


### STEP 1: Download and install
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