675     VEC3 segDir;  in DistSqLine3ToSegment3()  local
676     VEC3Sub(&segDir, &S->P1, &S->P0);  in DistSqLine3ToSegment3()
684     b = VEC3Dot(&L0->d, &segDir);  in DistSqLine3ToSegment3()
685     c = VEC3SquareLen(&segDir);  in DistSqLine3ToSegment3()
687     e = VEC3Dot(&segDir, &u);  in DistSqLine3ToSegment3()
734     VEC3Sub(&v, &v, VEC3Scale(&tmp, &segDir, t_));  in DistSqLine3ToSegment3()
817     VEC3 segDir;  in DistSqRay3ToSegment3()  local
822     VEC3Sub(&segDir, &S->P1, &S->P0);  in DistSqRay3ToSegment3()
825     b = VEC3Dot(&R0->d, &segDir);  in DistSqRay3ToSegment3()
826     c = VEC3SquareLen(&segDir);  in DistSqRay3ToSegment3()
828     e = VEC3Dot(&segDir, &u);  in DistSqRay3ToSegment3()
901     VEC3Sub(&v, &v, VEC3Scale(&tmp, &segDir, t_));  in DistSqRay3ToSegment3()