Transformed triangle mesh render incorrectly

[nidin]

Transformed triangle mesh render incorrectly seems like normal calculations are wrong.

Scale = 1

Scale = 0.9

[fogleman]

Nice catch, thanks! For some reason, translating and rotating worked but not scaling.

Fixed with aac95259dbc79b708cbd1d4e726b81407bb73475

Also added examples/ellipsoid.go to verify non-uniform scaling.

[fogleman]

Found a couple more issues and fixed them. Here's a before & after of the new example.

Before:

After:

[ghost]

First: what editor used? Second: I found way to run examples... even 32-bit.

[nidin]

@acterhd If the first question is for me, Answer is WebStorm. and good that you found a way to run examples :+1: