/usr/include/sofa/component/topology/ManifoldEdgeSetTopologyContainer.h is in libsofa1-dev 1.0~beta4-9.
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* SOFA, Simulation Open-Framework Architecture, version 1.0 beta 4 *
* (c) 2006-2009 MGH, INRIA, USTL, UJF, CNRS *
* *
* This library is free software; you can redistribute it and/or modify it *
* under the terms of the GNU Lesser General Public License as published by *
* the Free Software Foundation; either version 2.1 of the License, or (at *
* your option) any later version. *
* *
* This library is distributed in the hope that it will be useful, but WITHOUT *
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or *
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License *
* for more details. *
* *
* You should have received a copy of the GNU Lesser General Public License *
* along with this library; if not, write to the Free Software Foundation, *
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. *
*******************************************************************************
* SOFA :: Modules *
* *
* Authors: The SOFA Team and external contributors (see Authors.txt) *
* *
* Contact information: contact@sofa-framework.org *
******************************************************************************/
#ifndef SOFA_COMPONENT_TOPOLOGY_MANIFOLDEDGESETTOPOLOGYCONTAINER_H
#define SOFA_COMPONENT_TOPOLOGY_MANIFOLDEDGESETTOPOLOGYCONTAINER_H
#include <sofa/component/topology/EdgeSetTopologyContainer.h>
namespace sofa
{
namespace component
{
namespace topology
{
class ManifoldEdgeSetTopologyModifier;
using core::componentmodel::topology::BaseMeshTopology;
typedef BaseMeshTopology::PointID PointID;
typedef BaseMeshTopology::EdgeID EdgeID;
typedef BaseMeshTopology::Edge Edge;
typedef BaseMeshTopology::SeqEdges SeqEdges;
typedef BaseMeshTopology::VertexEdges VertexEdges;
/** a class that stores a set of edges and provides access to the adjacency between points and edges.
this topology is constraint by the manifold property : each vertex is adjacent either to one vertex or to two vertices. */
class SOFA_COMPONENT_CONTAINER_API ManifoldEdgeSetTopologyContainer : public EdgeSetTopologyContainer
{
friend class ManifoldEdgeSetTopologyModifier;
public:
ManifoldEdgeSetTopologyContainer();
ManifoldEdgeSetTopologyContainer(const sofa::helper::vector< Edge > &edges);
virtual ~ManifoldEdgeSetTopologyContainer() {}
virtual void init();
virtual void clear();
/** \brief Checks if the topology is coherent
*
* Check if the shell arrays are coherent
*/
virtual bool checkTopology() const;
/** \brief Returns the number of connected components from the graph containing all edges and give, for each vertex, which component it belongs to (use BOOST GRAPH LIBRAIRY)
@param components the array containing the optimal vertex permutation according to the Reverse CuthillMckee algorithm
*/
virtual int getNumberConnectedComponents(sofa::helper::vector<unsigned int>& components);
protected:
/** \brief Creates the EdgeSetIndex.
*
* This function is only called if the EdgeShell member is required.
* EdgeShell[i] contains the indices of all edges having the ith DOF as
* one of their ends.
*/
virtual void createEdgeVertexShellArray();
private:
// Describe each connected component, which can be seen as an oriented line
class ConnectedComponent
{
public:
ConnectedComponent(unsigned int FirstVertexIndex=-1, unsigned int LastVertexIndex=-1, unsigned int size=0,unsigned int ccIndex=0)
: FirstVertexIndex(FirstVertexIndex), LastVertexIndex(LastVertexIndex), size(size), ccIndex(ccIndex)
{}
virtual ~ConnectedComponent() {}
public:
unsigned int FirstVertexIndex; // index of the first vertex on the line
unsigned int LastVertexIndex; // index of the last vertex on the line
unsigned int size; // number of the vertices on the line
unsigned int ccIndex; // index of the connected component stored in the m_ConnectedComponentArray
};
/** \brief Resets the array of connected components and the ComponentVertex array (which are not valide anymore).
*
*/
void resetConnectedComponent()
{
m_ComponentVertexArray.clear();
m_ConnectedComponentArray.clear();
}
/** \brief Returns true iff the array of connected components and the ComponentVertex array are valide (ie : not void)
*
*/
bool isvoid_ConnectedComponent()
{
return m_ConnectedComponentArray.size()==0;
}
/** \brief Computes the array of connected components and the ComponentVertex array (which makes them valide).
*
*/
void computeConnectedComponent();
/** \brief Returns the number of connected components.
*
*/
virtual int getNumberOfConnectedComponents()
{
computeConnectedComponent();
return m_ConnectedComponentArray.size();
}
/** \brief Returns the FirstVertexIndex of the ith connected component.
*
*/
virtual int getFirstVertexIndex(unsigned int i)
{
computeConnectedComponent();
assert(i<m_ConnectedComponentArray.size());
return m_ConnectedComponentArray[i].FirstVertexIndex;
}
/** \brief Returns the LastVertexIndex of the ith connected component.
*
*/
virtual int getLastVertexIndex(unsigned int i)
{
computeConnectedComponent();
assert(i<m_ConnectedComponentArray.size());
return m_ConnectedComponentArray[i].LastVertexIndex;
}
/** \brief Returns the size of the ith connected component.
*
*/
virtual int getComponentSize(unsigned int i)
{
computeConnectedComponent();
assert(i<m_ConnectedComponentArray.size());
return m_ConnectedComponentArray[i].size;
}
/** \brief Returns the index of the ith connected component.
*
*/
virtual int getComponentIndex(unsigned int i)
{
computeConnectedComponent();
assert(i<m_ConnectedComponentArray.size());
return m_ConnectedComponentArray[i].ccIndex;
}
/** \brief Returns true iff the ith connected component is closed (ie : iff FirstVertexIndex == LastVertexIndex).
*
*/
virtual bool isComponentClosed(unsigned int i)
{
computeConnectedComponent();
assert(i<m_ConnectedComponentArray.size());
return (m_ConnectedComponentArray[i].FirstVertexIndex == m_ConnectedComponentArray[i].LastVertexIndex);
}
/** \brief Returns the indice of the vertex which is next to the vertex indexed by i.
*/
int getNextVertex(const unsigned int i)
{
assert(getEdgeVertexShell(i).size()>0);
if((getEdgeVertexShell(i)).size()==1 && (getEdge((getEdgeVertexShell(i))[0]))[1]==i){
return -1;
}else{
return (getEdge((getEdgeVertexShell(i))[0]))[1];
}
}
/** \brief Returns the indice of the vertex which is previous to the vertex indexed by i.
*/
int getPreviousVertex(const unsigned int i)
{
assert(getEdgeVertexShell(i).size()>0);
if((getEdgeVertexShell(i)).size()==1 && (getEdge((getEdgeVertexShell(i))[0]))[0]==i){
return -1;
}else{
return (getEdge((getEdgeVertexShell(i))[0]))[0];
}
}
/** \brief Returns the indice of the edge which is next to the edge indexed by i.
*/
int getNextEdge(const unsigned int i)
{
if((getEdgeVertexShell(getEdge(i)[1])).size()==1){
return -1;
}else{
return (getEdgeVertexShell(getEdge(i)[1]))[1];
}
}
/** \brief Returns the indice of the edge which is previous to the edge indexed by i.
*/
int getPreviousEdge(const unsigned int i)
{
if((getEdgeVertexShell(getEdge(i)[0])).size()==1){
return -1;
}else{
return (getEdgeVertexShell(getEdge(i)[0]))[0];
}
}
/** \brief Returns the ComponentVertex array.
*
*/
const sofa::helper::vector< unsigned int > &getComponentVertexArray() const
{
return m_ComponentVertexArray;
}
/** \brief Returns the array of connected components.
*
*/
const sofa::helper::vector< ConnectedComponent > &getConnectedComponentArray() const
{
return m_ConnectedComponentArray;
}
private:
/** The array that stores for each vertex index, the connected component the vertex belongs to */
sofa::helper::vector< unsigned int > m_ComponentVertexArray;
/** The array that stores the connected components */
sofa::helper::vector< ConnectedComponent > m_ConnectedComponentArray;
};
} // namespace topology
} // namespace component
} // namespace sofa
#endif
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