[Plib-cvs] plib/src/sg sg.h,1.56,1.57 sgIsect.cxx,1.7,1.8

[Steve B. <sj...@us...>]

Update of /cvsroot/plib/plib/src/sg
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv12104/plib/src/sg

Modified Files:
	sg.h sgIsect.cxx 
Log Message:
Added ssgStatistics.
Fixed bug in sgIsect.cxx that could cause div0 error.


Index: sg.h
===================================================================
RCS file: /cvsroot/plib/plib/src/sg/sg.h,v
retrieving revision 1.56
retrieving revision 1.57
diff -u -d -r1.56 -r1.57
--- sg.h	21 Jan 2004 22:33:46 -0000	1.56
+++ sg.h	2 Feb 2004 01:35:15 -0000	1.57
@@ -1382,8 +1382,14 @@
 SGfloat sgIsectLinesegPlane ( sgVec3 dst,
                               sgVec3 v1, sgVec3 v2,
                               sgVec4 plane ) ;
-bool sgPointInTriangle      ( sgVec3 point, sgVec3 tri[3] );
 
+bool sgPointInTriangle3     ( sgVec3 point, sgVec3 tri[3] ) ;
+bool sgPointInTriangle2     ( sgVec2 point, sgVec2 tri[3] ) ;
+
+inline bool sgPointInTriangle ( sgVec3 point, sgVec3 tri[3] )
+{
+  return sgPointInTriangle3 ( point, tri ) ;
+}
 
 
 

Index: sgIsect.cxx
===================================================================
RCS file: /cvsroot/plib/plib/src/sg/sgIsect.cxx,v
retrieving revision 1.7
retrieving revision 1.8
diff -u -d -r1.7 -r1.8
--- sgIsect.cxx	2 Sep 2002 06:05:46 -0000	1.7
+++ sgIsect.cxx	2 Feb 2004 01:35:15 -0000	1.8
@@ -226,129 +226,165 @@
 
 
 // return the sign of a value
-static inline const int SG_SIGN( const SGfloat x ) {
-	return x < 0 ? -1 : 1;
+
+static inline const int SG_SIGN( const SGfloat x )
+{
+  return x < 0 ? -1 : 1;
 }
 
[...234 lines suppressed...]
+
+  sgMake2DLine ( le, a, b ) ;
+
+  if ( SG_SIGN ( le[0]*c[0]     + le[1]*c[1]     + le[2] ) !=
+       SG_SIGN ( le[0]*point[0] + le[1]*point[1] + le[2] ) ) return false ;
+
+  sgMake2DLine ( le, b, c ) ;
+
+  if ( SG_SIGN ( le[0]*a[0]     + le[1]*a[1]     + le[2] ) !=
+       SG_SIGN ( le[0]*point[0] + le[1]*point[1] + le[2] ) ) return false ;
+
+  sgMake2DLine ( le, c, a ) ;
+
+  if ( SG_SIGN ( le[0]*b[0]     + le[1]*b[1]     + le[2] ) !=
+       SG_SIGN ( le[0]*point[0] + le[1]*point[1] + le[2] ) ) return false ;
+
+  return true ;
+}
+
+