- added color_cast from Vec4f to Vec4i and Vec4ui

- added colori and colorAi functions to BaseExporter which return Vec3i and Vec4i respectively
- adjusted the PLYWriter to use colori and colorAi for writing ascii files

refs #1405

git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@815 fdac6126-5c0c-442c-9429-916003d36597

src/OpenMesh/Core/IO/exporter/BaseExporter.hh

@@ -91,6 +91,8 @@ public:
   virtual Vec3f  normal(VertexHandle _vh)   const = 0;
   virtual Vec3uc color(VertexHandle _vh)    const = 0;
   virtual Vec4uc colorA(VertexHandle _vh)   const = 0;
+  virtual Vec3ui colori(VertexHandle _vh)    const = 0;
+  virtual Vec4ui colorAi(VertexHandle _vh)   const = 0;
   virtual Vec2f  texcoord(VertexHandle _vh) const = 0;
 
 
@@ -105,6 +107,8 @@ public:
   // get edge data
   virtual Vec3uc color(EdgeHandle _eh)    const = 0;
   virtual Vec4uc colorA(EdgeHandle _eh)   const = 0;
+  virtual Vec3ui colori(EdgeHandle _vh)    const = 0;
+  virtual Vec4ui colorAi(EdgeHandle _vh)   const = 0;
 
   // get reference to base kernel
   virtual const BaseKernel* kernel() { return 0; }

src/OpenMesh/Core/IO/exporter/ExporterT.hh

@@ -113,6 +113,20 @@ public:
       : Vec4uc(0, 0, 0, 0));
   }
 
+  Vec3ui colori(VertexHandle _vh)    const
+  {
+    return (mesh_.has_vertex_colors()
+	    ? color_cast<Vec3ui>(mesh_.color(_vh))
+	    : Vec3ui(0, 0, 0));
+  }
+
+  Vec4ui colorAi(VertexHandle _vh)   const
+  {
+    return (mesh_.has_vertex_colors()
+      ? color_cast<Vec4ui>(mesh_.color(_vh))
+      : Vec4ui(0, 0, 0, 0));
+  }
+
   Vec2f  texcoord(VertexHandle _vh) const
   {
 #if defined(OM_CC_GCC) && (OM_CC_VERSION<30000)
@@ -145,6 +159,19 @@ public:
       : Vec4uc(0, 0, 0, 0));
   }
 
+  Vec3ui colori(EdgeHandle _eh)    const
+  {
+      return (mesh_.has_edge_colors()
+      ? color_cast<Vec3ui>(mesh_.color(_eh))
+      : Vec3ui(0, 0, 0));
+  }
+
+  Vec4ui colorAi(EdgeHandle _eh)   const
+  {
+      return (mesh_.has_edge_colors()
+      ? color_cast<Vec4ui>(mesh_.color(_eh))
+      : Vec4ui(0, 0, 0, 0));
+  }
 
   // get face data
 
@@ -182,6 +209,20 @@ public:
             : Vec4uc(0, 0, 0, 0));
   }
 
+  Vec3ui  colori(FaceHandle _fh)   const
+  {
+    return (mesh_.has_face_colors()
+            ? color_cast<Vec3ui>(mesh_.color(_fh))
+            : Vec3ui(0, 0, 0));
+  }
+
+  Vec4ui  colorAi(FaceHandle _fh)   const
+  {
+    return (mesh_.has_face_colors()
+            ? color_cast<Vec4ui>(mesh_.color(_fh))
+            : Vec4ui(0, 0, 0, 0));
+  }
+
   virtual const BaseKernel* kernel() { return &mesh_; }
 
 

src/OpenMesh/Core/IO/writer/PLYWriter.cc

@@ -178,8 +178,8 @@ write_ascii(std::ostream& _out, BaseExporter& _be, Options _opt) const
 
   unsigned int i, j, nV, nF;
   Vec3f v, n;
-  OpenMesh::Vec3uc c;
-  OpenMesh::Vec4uc cA;
+  OpenMesh::Vec3ui c;
+  OpenMesh::Vec4ui cA;
   OpenMesh::Vec2f t;
   VertexHandle vh;
   std::vector<VertexHandle> vhandles;
@@ -242,12 +242,12 @@ write_ascii(std::ostream& _out, BaseExporter& _be, Options _opt) const
     if ( _opt.vertex_has_color() ) {
       //with alpha
       if ( _opt.color_has_alpha() ){
-        cA  = _be.colorA(vh);
-        _out << " " << (unsigned int)cA[0] << " " << (unsigned int)cA[1] << " " << (unsigned int)cA[2] << " " << (unsigned int)cA[3];
+        cA  = _be.colorAi(vh);
+        _out << " " << cA;
       }else{
         //without alpha
-        c  = _be.color(vh);
-        _out << " " << (unsigned int)c[0] << " " << (unsigned int)c[1] << " " << (unsigned int)c[2];
+        c  = _be.colori(vh);
+        _out << " " << c;
       }
     }
 

src/OpenMesh/Core/Utils/color_cast.hh

@@ -140,6 +140,20 @@ struct color_caster<Vec3i,Vec4f>
   }
 };
 
+template <>
+struct color_caster<Vec4i,Vec4f>
+{
+  typedef Vec4i return_type;
+
+  inline static return_type cast(const Vec4f& _src)
+  {
+    return Vec4i( (int)(_src[0]* 255.0f + 0.5f),
+                  (int)(_src[1]* 255.0f + 0.5f),
+                  (int)(_src[2]* 255.0f + 0.5f),
+                  (int)(_src[3]* 255.0f + 0.5f) );
+  }
+};
+
 template <>
 struct color_caster<Vec3ui,Vec3f>
 {
@@ -166,6 +180,20 @@ struct color_caster<Vec3ui,Vec4f>
   }
 };
 
+template <>
+struct color_caster<Vec4ui,Vec4f>
+{
+  typedef Vec4ui return_type;
+
+  inline static return_type cast(const Vec4f& _src)
+  {
+    return Vec4ui( (unsigned int)(_src[0]* 255.0f + 0.5f),
+                   (unsigned int)(_src[1]* 255.0f + 0.5f),
+                   (unsigned int)(_src[2]* 255.0f + 0.5f),
+                   (unsigned int)(_src[3]* 255.0f + 0.5f) );
+  }
+};
+
 template <>
 struct color_caster<Vec4uc,Vec3f>
 {