Sometimes you need a quick way to code up a triangulated mesh. This is a Three.js + CodeMirror tool to do live WebGL coding with STL and OBJ export.
Drag to rotate, scroll to zoom, right click and drag to pan.
Click "Save STL" to save a binary STL.
Click "Save OBJ" to save an OBJ.
Ctrl/⌘+S to save a .js file with your code.
Drag to resize editor.
Built by Amanda Ghassaei, code on Github.