Three.js
Three.js is a 3D Javscript library
Coordinate system
Three.js uses the coordinate system shown in the following picture:
- x: red
- y: green (up)
- z: blue
See also https://tweedegolf.nl/blog/5/threejs-rotations
Robot Simulator
see https://discourse.threejs.org/t/robot-simulation-rotation-issues/9065