Ray casting to objects with a common border

[hofk]

@aitheorem

One observation that I made is that when I click on the interior of the quadrilaterals, the ray that cast is always at one of the edges and not at the location that was clicked on. Why is this?

Maybe this can help?
(Note! From r95 raycast multi-material is supported correctly!)

Modify indexed BufferGeometry (mouse or input)

I wrote a HTML/Script. [modifyGeometry] A basic version led to a question that was solved thanks to mugen87. [SOLVED] Raycaster - MultiMaterial Therefore, it is essential to use three-version three.89.mugen.js. (workaround from mugen87, raycast for multi material) The tool makes it possible to modify indexed BufferGeometry with the mouse or by input. It requires the output of the modifyCreateGeo.html. See Addon. Produces almost infinite many time-varying geometries with fu…

In these examples I select triangle, edge or corner.

http://threejs.hofk.de/modifyGeo/modifyGeo.html
http://sandboxthreef.threejs.hofk.de/modifyRaycastMultiMaterial.html