From 71dbb53a60026e37983d67c71d718cc1b54c3d33 Mon Sep 17 00:00:00 2001
From: cignoni <paolo.cignoni@isti.cnr.it>
Date: Thu, 24 Jun 2004 07:55:50 +0000
Subject: [PATCH] Now color ramp can do reverse color ramp

---
 vcg/space/color4.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/vcg/space/color4.h b/vcg/space/color4.h
index 68158671..f887c67a 100644
--- a/vcg/space/color4.h
+++ b/vcg/space/color4.h
@@ -24,6 +24,9 @@
   History
 
 $Log: not supported by cvs2svn $
+Revision 1.6  2004/05/26 15:10:29  cignoni
+Corrected bug in setgrayshade
+
 Revision 1.5  2004/05/07 12:46:55  cignoni
 added ifdef for gcc [Bug c++/14479]
 
@@ -103,6 +106,7 @@ public:
 	
   inline void lerp(const Color4 &c0, const Color4 &c1, const float x);
 	inline void lerp(const Color4 &c0, const Color4 &c1, const Color4 &c2, const Point3f &ip);
+  /// given a float and a range set the corresponding color in the well known red->green->blue color ramp. To reverse the direction of the ramp just swap minf and maxf.
 	inline void ColorRamp(const float &minf,const float  &maxf ,float v );
 
 	inline void SetRGB( unsigned char r, unsigned char g, unsigned char b )
@@ -209,6 +213,7 @@ inline void Color4<T>::lerp(const Color4<T> &c0, const Color4<T> &c1, const Colo
 template <class T>
 inline void Color4<T>::ColorRamp(const float &minf,const float  &maxf ,float v )
 {
+  if(minf>maxf) { ColorRamp(maxf,minf,maxf+(minf-v)); return; }
 	if(v <  minf ) { *this=Color4(Color4<T>::Red); return; }
 	
 	float step=(maxf-minf)/4;