Added Parula-like color map

removed bug on un-clamped set gray

vcg/complex/algorithms/update/color.h

@@ -184,6 +184,27 @@ public:
               (*vi).C().SetColorRamp(minq,maxq,(*vi).Q());
   }
 
+  
+  /*! \brief This function colores all the faces of a mesh with a hue color shade dependent on the quality.
+
+  If no range of quality is passed it is automatically computed.
+  */
+  static void PerVertexQualityRampParula(MeshType &m, float minq=0, float maxq=0)
+  {
+    RequirePerVertexQuality(m);
+    RequirePerVertexColor(m);
+
+    if(minq==maxq)
+    {
+      std::pair<float,float> minmax = Stat<MeshType>::ComputePerVertexQualityMinMax(m);
+      minq=minmax.first;
+      maxq=minmax.second;
+    }
+    for(VertexIterator vi=m.vert.begin();vi!=m.vert.end();++vi)
+          if(!(*vi).IsD())
+              (*vi).C().SetColorRampParula(minq,maxq,(*vi).Q());
+  }
+  
   /*! \brief This function colores all the faces of a mesh with a hue color shade dependent on the quality.
 
   If no range of quality is passed it is automatically computed.

vcg/space/color4.h

@@ -71,6 +71,7 @@ public:
   inline Color4 ( const Point4<T> &c) :Point4<T>(c) {}
   inline Color4 (){}
   inline Color4 (ColorConstant cc);
+  inline Color4 (unsigned int cc);
 
   template <class Q>
     inline void Import(const Color4<Q> & b )
@@ -147,6 +148,27 @@ public:
         *this= Color4<T>(Color4<T>::Blue);
     }
 
+    inline void SetColorRampParula(const float &minf,const float  &maxf ,float v)
+    {
+      if(minf>maxf) { SetColorRampParula(maxf,minf,maxf+(minf-v)); return; }
+      SetColorRampParula((v-minf)/(maxf-minf));      
+    }
+
+    inline void SetColorRampParula(float v)
+    {
+      if(v<0) v=0;
+      else if(v>1) v=1;
+      
+      unsigned int ParuVal[9]={0xff801627,  0xffe16303,  0xffd48514,
+                               0xffc6a706,  0xff9eb938,  0xff73bf92,
+                               0xff56bad9,  0xff2ecefc,  0xff0afaff};
+      int ind = int(floor(v*8.0f)); 
+      float div = (v*8.0f - ind);
+      if(div<0) div=0;
+      else if(div>1) div=1;
+      lerp(Color4<T>(ParuVal[ind]),  Color4<T>(ParuVal[ind+1]), div);
+    }
+
     void SetHSVColor( float h, float s, float v)
     {
       float r,g,b;
@@ -185,6 +207,9 @@ public:
 
 inline static Color4 GrayShade(float f)
 {
+  if(f<0) f=0.0f;
+  else if(f>1) f=1.0f;
+  
   return Color4(f,f,f,1);
 }
 
@@ -301,6 +326,18 @@ inline Color4<float>::Color4(Color4<float>::ColorConstant cc)
   Import(Color4<unsigned char>((Color4<unsigned char>::ColorConstant)cc));
 }
 
+template<>
+inline Color4<unsigned char>::Color4(unsigned int cc)
+{
+  *((int *)this )= cc;
+}
+
+template<>
+inline Color4<float>::Color4(unsigned int cc)
+{
+  Import(Color4<unsigned char>(cc));
+}
+
 inline Color4<float> Clamp(Color4<float> &c)
 {
     c[0]=math::Clamp(c[0],0.0f,1.0f);