using the webcam as a low res facetted brightness input device
https://codepen.io/tristanschulze/full/porpMqN
pixel difference operation – aka low tech motion detection with a smoothed centered blob
https://codepen.io/tristanschulze/full/ExvQYaL
basic heatmap motion detection – all pixel difference is stored in buffer array to be visualized
https://codepen.io/tristanschulze/full/RwZQbjN
this step generates one continuous heatmap from recognized motion as a low resolution image to be processed further
https://codepen.io/tristanschulze/full/RwZQbjN
todo – implement voxel 3D with shader > https://www.shadertoy.com/view/NtfXWS