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