Create point cloud visualizer

[PeterBowman]

Some possibly helpful links, contributed by @jgvictores:

• https://github.com/jgvictores/snippets/tree/master/vtk
• https://github.com/jgvictores/snippets/tree/master/pcl%2Bvtk
• http://www.open3d.org/docs/release/tutorial/Basic/pointcloud.html
• https://github.com/rdeits/meshcat-python (linked from https://github.com/roboticslab-uc3m/data-visualization)

And VTK implementations:

• skeletonViewer module in https://github.com/robotology/assistive-rehab
• OpenCV Viz module in https://github.com/opencv/opencv_contrib (docs)

[jgvictores]

Also at https://github.com/roboticslab-uc3m/sign-language-papers/issues/4 (private) we mentioned:

• https://github.com/daavoo/pyntcloud

BTW, the resulting code developed at that issue (using resources from https://github.com/roboticslab-uc3m/sign-language-papers/issues/3 (private)) resulted in https://github.com/roboticslab-uc3m/sign-language-papers/blob/67d816ab93a6d5b6ff204631d6aaf66d3eaa787a/python/snippets/3-plot-layers.py which uses instead uses a vanilla matplotlib scatter: extremely slow for the purpose, so this kind of vanilla implementation is not something you would go if you want a good framerate with no latency.

[PeterBowman]

A few more VTK resources:

• https://vtk.org/Wiki/VTK/Tutorials
• https://vtk.org/Wiki/VTK/Tutorials/External_Tutorials
• https://vtk.org/documentation/
  • https://www.kitware.com/products/books/VTKUsersGuide.pdf
  • https://raw.githubusercontent.com/lorensen/VTKExamples/master/src/VTKBookLaTeX/VTKTextBook.pdf
• https://vtk.org/doc/nightly/html/
• https://lorensen.github.io/VTKExamples/site/

OpenCV's Viz impl and usage:

• https://github.com/opencv/opencv_contrib/blob/5fae4082cc493efa5cb7a7486f9e009618a5198b/modules/rgbd/samples/kinfu_demo.cpp
• https://docs.opencv.org/4.4.0/d9/d62/namespacecv_1_1viz.html
• https://docs.opencv.org/4.4.0/db/d82/classcv_1_1viz_1_1WCloud.html
• https://github.com/opencv/opencv_contrib/blob/5fae4082cc493efa5cb7a7486f9e009618a5198b/modules/viz/src/clouds.cpp