Fixed PLY reader compilation with Color Trait as Vec3f

src/OpenMesh/Core/Utils/Property.hh

@@ -250,7 +250,7 @@ public: // inherited from BaseProperty
   virtual void reserve(size_t _n) override { data_.reserve(_n);    }
   virtual void resize(size_t _n) override  { data_.resize(_n);     }
   virtual void clear() override  { data_.clear(); vector_type().swap(data_);    }
-  virtual void push_back() override        { data_.push_back(); }
+  virtual void push_back() override        { data_.push_back(bool()); }
   virtual void swap(size_t _i0, size_t _i1) override
   { bool t(data_[_i0]); data_[_i0]=data_[_i1]; data_[_i1]=t; }
   virtual void copy(size_t _i0, size_t _i1) override

src/OpenMesh/Core/Utils/color_cast.hh

@@ -210,6 +210,20 @@ struct color_caster<Vec4uc,Vec3f>
   }
 };
 
+template <>
+struct color_caster<Vec4ui,Vec3f>
+{
+    typedef Vec4ui return_type;
+
+    inline static return_type cast(const Vec3f& _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)(255) );
+    }
+};
+
 template <>
 struct color_caster<Vec4f,Vec3f>
 {