There is a potential performance drawback due to a type mismatch in TriangleMesh.java:548 as `points.size()` returns `int` so storing as `double` makes not much sense.

Current Code:
```
final double len = points.size();
```

Proposes Fix:
```
final int len = points.size();
```

(Original Reporter: Dr Michael PAUS via TeamFX)