[BUG] math::Ray ill defined if a component of its direction is zero. #2094
Description
Environment
Debian Trixie
Describe the bug
When a Ray is created with direction component that is zero, then mInvDir will be ill defined.
To Reproduce
Run unit tests, a ray with direction 1,0,0 will divide by zero.
Expected behavior
No FP exception.
Additional context
[ RUN ] TestLevelSetRayIntersector.tests
Thread 1 "vdb_test" received signal SIGFPE, Arithmetic exception.
(gdb) up
#1 0x0000555557ec7a60 in openvdb::v12_1::math::Ray<double>::Ray (
this=0x7fffffffd8f0, eye=..., direction=..., t0=1.0000000000000001e-09,
t1=1.7976931348623157e+308)
at /home/bram/src/openvdb/openvdb/openvdb/../openvdb/math/Ray.h:61
61 : mEye(eye), mDir(direction), mInvDir(1/mDir), mTimeSpan(t0, t1)
(gdb) print mDir
$1 = {<openvdb::v12_1::math::Tuple<3, double>> = {static size = 3, mm = {1, 0,
0}}, <No data fields>}