490     VEC3 u;  in DistSqLine3ToLine3()  local
493     VEC3Sub(&u, &L0->P, &L1->P);  in DistSqLine3ToLine3()
497     d = VEC3Dot(&L0->d, &u);  in DistSqLine3ToLine3()
498     e = VEC3Dot(&L1->d, &u);  in DistSqLine3ToLine3()
499     f = VEC3SquareLen(&u);  in DistSqLine3ToLine3()
530         VEC3Add(&tmp2, &tmp2, &u);  in DistSqLine3ToLine3()
539     VEC3   u(S1->P1 - S1->P0);  in DistSqSegment3ToSegment3()  local
542     f32    a = VEC3SquareLen(&u);        // always >= 0  in DistSqSegment3ToSegment3()
543     f32    b = VEC3Dot(&u, &v);  in DistSqSegment3ToSegment3()
545     f32    d = VEC3Dot(&u, &w);  in DistSqSegment3ToSegment3()
609     VEC3   dP = w + (u * sc) - (v * tc);  // = S1(sc) - S2(tc)  in DistSqSegment3ToSegment3()
618     VEC3 u;  in DistSqLine3ToRay3()  local
622     VEC3Sub(&u, &L->P, &R->P);  in DistSqLine3ToRay3()
626     d = VEC3Dot(&L->d, &u);  in DistSqLine3ToRay3()
627     e = VEC3Dot(&R->d, &u);  in DistSqLine3ToRay3()
678     VEC3 u;  in DistSqLine3ToSegment3()  local
682     VEC3Sub(&u, &L0->P, &S->P0);  in DistSqLine3ToSegment3()
686     d = VEC3Dot(&L0->d, &u);  in DistSqLine3ToSegment3()
687     e = VEC3Dot(&segDir, &u);  in DistSqLine3ToSegment3()
743     VEC3 u;  in DistSqRay3ToRay3()  local
747     VEC3Sub(&u, &R0->P, &R1->P);  in DistSqRay3ToRay3()
751     d = VEC3Dot(&R0->d, &u);  in DistSqRay3ToRay3()
752     e = VEC3Dot(&R1->d, &u);  in DistSqRay3ToRay3()
818     VEC3 u;  in DistSqRay3ToSegment3()  local
823     VEC3Sub(&u, &R0->P, &S->P0);  in DistSqRay3ToSegment3()
827     d = VEC3Dot(&R0->d, &u);  in DistSqRay3ToSegment3()
828     e = VEC3Dot(&segDir, &u);  in DistSqRay3ToSegment3()