added unified method for length/area/volume of an element

MeshLib/Elements/Cell.h

@@ -18,12 +18,15 @@ namespace MeshLib {
 class Cell : public Element
 {
 public:
-	/// Get the volume of this 3d element.
-	virtual double getVolume() const { return _volume; };
+	/// Returns the length, area or volume of a 1D, 2D or 3D element
+	double getContent() const { return _volume; };
 
 	/// Get dimension of the mesh element.
 	unsigned getDimension() const { return 3; };
 
+	/// Get the volume of this 3d element.
+	virtual double getVolume() const { return _volume; };
+
 	/// Destructor
 	virtual ~Cell();
 

MeshLib/Elements/Edge.h

@@ -38,6 +38,9 @@ public:
 	/// Destructor
 	virtual ~Edge();
 
+	/// Returns the length, area or volume of a 1D, 2D or 3D element
+	double getContent() const { return _length; };
+
 	/// Returns the edge i of the element.
 	const Element* getEdge(unsigned i) const { (void)i; return NULL; };
 

MeshLib/Elements/Element.h

@@ -30,6 +30,9 @@ public:
 	/// Compute the minimum and maximum squared edge length for this element
 	virtual void computeSqrEdgeLengthRange(double &min, double &max) const;
 
+	/// Returns the length, area or volume of a 1D, 2D or 3D element
+	virtual double getContent() const = 0;
+
 	/// Get node with local index i.
 	const Node* getNode(unsigned i) const;
 

MeshLib/Elements/Face.h

@@ -21,6 +21,9 @@ public:
 	/// Get the area of this 2d element.
 	virtual double getArea() const { return _area; };
 
+	/// Returns the length, area or volume of a 1D, 2D or 3D element
+	double getContent() const { return _area; };
+
 	/// Get dimension of the mesh element.
 	unsigned getDimension() const { return 2; };
 

MeshLib/Mesh.h

@@ -72,6 +72,11 @@ public:
 	/// Get the element-vector for the mesh.
 	const std::vector<Element*> getElements() const { return _elements; };
 
+	/** 
+	 * Set the minimum and maximum length over the edges of the mesh.
+	 * This should have been previously calcumlated using the Element::computeSqrEdgeLengthRange(min, max) 
+	 * function or by some other means.
+	 */
 	void setEdgeLengthRange(const double &min_length, const double &max_length);
 	
 protected: