Guarantee of affine status of Mat4::look_at_rh() and Mat4::look_at_lh() output

[ClydeHobart]

I've been getting some asserts when I turn on debug-glam-assert from calling transform_point3() on the output of Mat4::look_at_rh(), but upon inspection, row 3 typically falls in the range [[-0.0, -0.0, -0.0, 1.0], [0.0, 0.0, 0.0, 1.0000001]]. There's no means of supplying a perspective to these look_at_* functions, so shouldn't the error introduced by writing [0.0, 0.0, 0.0, 1.0] to row 3 be negligible? I'm admittedly not the most knowledgeable on 4x4 matrices, so apologies if I'm making baseless assumptions.

[bitshifter]

Yeah it looks like that assert needs an epsilon, it's doing an exact comparison with [0, 0, 0, 1]. I'll make a bug for this.

[bitshifter]

I've pushed a fix for this to main. I'm not sure when I'll make a new release, want to get some other stuff in as well.

[ClydeHobart]

Thanks!