67 lines
1.7 KiB
C++
67 lines
1.7 KiB
C++
|
// This code is in the public domain -- castanyo@yahoo.es
|
||
|
|
|
||
|
|
#pragma once
|
||
|
|
#ifndef NV_MESH_MESHTOPOLOGY_H
|
||
|
|
#define NV_MESH_MESHTOPOLOGY_H
|
||
|
|
|
||
|
|
#include <nvmesh/nvmesh.h>
|
||
|
|
|
||
|
|
namespace nv
|
||
|
|
{
|
||
|
|
namespace HalfEdge { class Mesh; }
|
||
|
|
class MeshAdjacency;
|
||
|
|
|
||
|
|
/// Mesh topology information.
|
||
|
|
class MeshTopology
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
MeshTopology(const HalfEdge::Mesh * mesh) { buildTopologyInfo(mesh); }
|
||
|
|
|
||
|
|
/// Determine if the mesh is connected.
|
||
|
|
bool isConnected() const { return m_connectedCount == 1; }
|
||
|
|
|
||
|
|
/// Determine if the mesh is closed. (Each edge is shared by two faces)
|
||
|
|
bool isClosed() const { return m_boundaryCount == 0; }
|
||
|
|
|
||
|
|
/// Return true if the mesh has the topology of a disk.
|
||
|
|
bool isDisk() const { return isConnected() && m_boundaryCount == 1/* && m_eulerNumber == 1*/; }
|
||
|
|
|
||
|
|
/// Return the number of connected components.
|
||
|
|
int connectedCount() const { return m_connectedCount; }
|
||
|
|
|
||
|
|
/// Return the number of open holes.
|
||
|
|
int holeCount() const { return m_boundaryCount; }
|
||
|
|
|
||
|
|
/// Return the genus of the mesh.
|
||
|
|
int genus() const { return m_genus; }
|
||
|
|
|
||
|
|
/// Return the euler number of the mesh.
|
||
|
|
int euler() const { return m_eulerNumber; }
|
||
|
|
|
||
|
|
|
||
|
|
static bool isQuadOnly(const HalfEdge::Mesh * mesh);
|
||
|
|
|
||
|
|
|
||
|
|
private:
|
||
|
|
|
||
|
|
NVMESH_API void buildTopologyInfo(const HalfEdge::Mesh * mesh);
|
||
|
|
|
||
|
|
private:
|
||
|
|
|
||
|
|
///< Number of boundary loops.
|
||
|
|
int m_boundaryCount;
|
||
|
|
|
||
|
|
///< Number of connected components.
|
||
|
|
int m_connectedCount;
|
||
|
|
|
||
|
|
///< Euler number.
|
||
|
|
int m_eulerNumber;
|
||
|
|
|
||
|
|
/// Mesh genus.
|
||
|
|
int m_genus;
|
||
|
|
};
|
||
|
|
|
||
|
|
} // nv namespace
|
||
|
|
|
||
|
|
#endif // NV_MESH_MESHTOPOLOGY_H
|