Cannot import com.mojang.math classes

[Etil]

The com.mojang.math package is part of the minecraft source, not other library.
Paperweight currently expects any import from the minecraft namespace to exist in net/minecraft, making i.e. minecraft com.mojang.math.OctahedralGroup or minecraft com.mojang.math.Transformation impossible.

[Bjarne Koll]

See

paperweight/paperweight-lib/src/main/kotlin/util/McDev.kt

Line 51 in 49031b3

 .map { targetDir.resolve("net/minecraft/$it.java") } 

and the general readMcDevNames method.