BufferAttribute applyMatrix3 method presumes itemSize equals 3

applyMatrix3 method of BufferAttribute presumes that itemSize equals 3. This can be seen in the BufferAttribute source code on line 202. I’m a newbie of three.js and maybe I miss something, but I think that’s not always true. For example, UVs in ShapeBufferGeometry have only 2 dimensions.

This led to some NaN in the BufferAttribute’s array after applying applyMatrix3. Maybe it’s possible to do a check itemSize inside the function to handle this case. For instance, we can use something similar to Vector2’s applyMatrix3 if itemSize === 2.

Here’s a sandbox that shows the problem and a simple function based on Vector2.

Three.js version: r117 Browser: All of them

[dumaron]

Yeah, of course, I’ll make it during this week. Thanks!

[dumaron]

It’s not texture atlas, my textures are large photos of marble. And there’s no modeling app: I’m creating my ShapeBufferGeometry from svg files.