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Comparing ray/src/rt/rtrace.c (file contents):
Revision 2.99 by greg, Mon Jul 20 15:54:29 2020 UTC vs.
Revision 2.100 by greg, Wed Jan 27 00:00:05 2021 UTC

#	Line 765 | Line 765 | static RREAL   vdummy[3] = {0.0, 0.0, 0.0};
765
766
767		static void
768	<	oputp(                          /* print point */
768	>	oputp(                          /* print intersection point */
769		RAY  *r
770		)
771		{
772	<	if (r->rot < FHUGE*.99)
773	<	(*putreal)(r->rop, 3);
774	<	else
775	<	(*putreal)(vdummy, 3);
772	>	(*putreal)(r->rop, 3);  /* set to ray origin if distant or no hit */
773		}
774
775
#	Line 781 | Line 778 | oputN(                         /* print unperturbed normal */
778		RAY  *r
779		)
780		{
781	<	if (r->rot < FHUGE*.99) {
785	<	if (r->rflips & 1) {    /* undo any flippin' flips */
786	<	FVECT   unrm;
787	<	unrm[0] = -r->ron[0];
788	<	unrm[1] = -r->ron[1];
789	<	unrm[2] = -r->ron[2];
790	<	(*putreal)(unrm, 3);
791	<	} else
792	<	(*putreal)(r->ron, 3);
793	<	} else
781	>	if (r->ro == NULL) {    /* zero vector if clipped or no hit */
782		(*putreal)(vdummy, 3);
783	+	return;
784	+	}
785	+	if (r->rflips & 1) {    /* undo any flippin' flips */
786	+	FVECT   unrm;
787	+	unrm[0] = -r->ron[0];
788	+	unrm[1] = -r->ron[1];
789	+	unrm[2] = -r->ron[2];
790	+	(*putreal)(unrm, 3);
791	+	} else
792	+	(*putreal)(r->ron, 3);
793		}
794
795
#	Line 802 | Line 800 | oputn(                         /* print perturbed normal */
800		{
801		FVECT  pnorm;
802
803	<	if (r->rot >= FHUGE*.99) {
803	>	if (r->ro == NULL) {    /* clipped or no hit */
804		(*putreal)(vdummy, 3);
805		return;
806		}

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