[ggt-info] gmtl::intersect tri and lineseg

[Thomas K. <t.k...@gm...>]

Hi,

In the intersection code for a Tri and a LineSeg I read the following in
Intersection.h on line 905
| Ray<DATA_TYPE> temp( lineseg.getOrigin(), lineseg.getDir() );
I don't understand the reason for this temporary copy and to what extent
'temp' is different from 'lineseg'.

If I wanted to have a double-sided Tri-LineSeg intersection would it be
enough to change
| bool result = intersect( tri, temp, u, v, t );
to
| bool result = intersectDoubleSided( tri, temp, u, v, t );
on line 906?

I hope some can shed some light onto my two questions. Thanks in advance.

Kind regards,
Thomas