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-rw-r--r--src/glu/sgi/libnurbs/internals/slicer.cc34
1 files changed, 17 insertions, 17 deletions
diff --git a/src/glu/sgi/libnurbs/internals/slicer.cc b/src/glu/sgi/libnurbs/internals/slicer.cc
index 70dd550972..0d7149144d 100644
--- a/src/glu/sgi/libnurbs/internals/slicer.cc
+++ b/src/glu/sgi/libnurbs/internals/slicer.cc
@@ -35,8 +35,8 @@
/*
* slicer.c++
*
- * $Date: 2001/05/01 14:56:00 $ $Revision: 1.2 $
- * $Header: /home/krh/git/sync/mesa-cvs-repo/Mesa/src/glu/sgi/libnurbs/internals/slicer.cc,v 1.2 2001/05/01 14:56:00 brianp Exp $
+ * $Date: 2002/06/30 16:58:11 $ $Revision: 1.3 $
+ * $Header: /home/krh/git/sync/mesa-cvs-repo/Mesa/src/glu/sgi/libnurbs/internals/slicer.cc,v 1.3 2002/06/30 16:58:11 brianp Exp $
*/
#include <stdlib.h>
@@ -309,7 +309,6 @@ static void triangulateRectAux(PwlArc* top, PwlArc* bot, PwlArc* left, PwlArc* r
static void triangulateRect(Arc_ptr loop, Backend& backend, int TB_or_LR, int ulinear, int vlinear)
{
- int i;
//we know the loop is a rectangle, but not sure which is top
Arc_ptr top, bot, left, right;
if(loop->tail()[1] == loop->head()[1])
@@ -572,8 +571,6 @@ static void triangulateRectCenter(int n_ulines, REAL* u_val,
int n_vlines, REAL* v_val,
Backend& backend)
{
- TrimVertex trimVert;
- trimVert.nuid = 0;//????
// XXX this code was patched by Diego Santa Cruz <Diego.SantaCruz@epfl.ch>
// to fix a problem in which glMapGrid2f() was called with bad parameters.
@@ -1075,18 +1072,21 @@ void Slicer::slice_new(Arc_ptr loop)
mydu = (du>0)? du: -du;
mydv = (dv>0)? dv: -dv;
- for(Arc_ptr jarc=loop->next; jarc != loop; jarc = jarc->next)
- {
-
- if(jarc->tail()[0] < uMin)
- uMin = jarc->tail()[0];
- if(jarc->tail()[0] > uMax)
- uMax = jarc->tail()[0];
- if(jarc->tail()[1] < vMin)
- vMin = jarc->tail()[1];
- if(jarc->tail()[1] > vMax)
- vMax = jarc->tail()[1];
- }
+ for(Arc_ptr jarc=loop->next; jarc != loop; jarc = jarc->next)
+ {
+
+ if(jarc->tail()[0] < uMin)
+ uMin = jarc->tail()[0];
+ if(jarc->tail()[0] > uMax)
+ uMax = jarc->tail()[0];
+ if(jarc->tail()[1] < vMin)
+ vMin = jarc->tail()[1];
+ if(jarc->tail()[1] > vMax)
+ vMax = jarc->tail()[1];
+ }
+
+ if (uMax == uMin)
+ return; // prevent divide-by-zero. Jon Perry. 17 June 2002
if(mydu > uMax - uMin)
num_ulines = 2;