166 lines
5.6 KiB
C++
166 lines
5.6 KiB
C++
/********************************************************************************
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* ReactPhysics3D physics library, http://www.reactphysics3d.com *
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* Copyright (c) 2010-2022 Daniel Chappuis *
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*********************************************************************************
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* *
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* This software is provided 'as-is', without any express or implied warranty. *
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* In no event will the authors be held liable for any damages arising from the *
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* use of this software. *
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* *
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* Permission is granted to anyone to use this software for any purpose, *
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* including commercial applications, and to alter it and redistribute it *
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* freely, subject to the following restrictions: *
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* *
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* 1. The origin of this software must not be misrepresented; you must not claim *
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* that you wrote the original software. If you use this software in a *
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* product, an acknowledgment in the product documentation would be *
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* appreciated but is not required. *
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* *
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* 2. Altered source versions must be plainly marked as such, and must not be *
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* misrepresented as being the original software. *
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* *
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* 3. This notice may not be removed or altered from any source distribution. *
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* *
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********************************************************************************/
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#ifndef REACTPHYSICS3D_POLYHEDRON_MESH_H
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#define REACTPHYSICS3D_POLYHEDRON_MESH_H
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// Libraries
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#include <reactphysics3d/mathematics/mathematics.h>
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#include <reactphysics3d/containers/Array.h>
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#include "HalfEdgeStructure.h"
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namespace reactphysics3d {
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// Declarations
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class DefaultAllocator;
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class PolygonVertexArray;
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// Class PolyhedronMesh
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/**
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* This class describes a polyhedron mesh made of faces and vertices.
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* The faces do not have to be triangles.
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*/
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class PolyhedronMesh {
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private:
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// -------------------- Attributes -------------------- //
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/// Reference to the memory allocator
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MemoryAllocator& mMemoryAllocator;
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/// Pointer the the polygon vertex array with vertices and faces
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/// of the mesh
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PolygonVertexArray* mPolygonVertexArray;
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/// Half-edge structure of the mesh
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HalfEdgeStructure mHalfEdgeStructure;
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/// Array with the face normals
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Vector3* mFacesNormals;
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/// Centroid of the polyhedron
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Vector3 mCentroid;
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// -------------------- Methods -------------------- //
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/// Constructor
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PolyhedronMesh(PolygonVertexArray* polygonVertexArray, MemoryAllocator& allocator);
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/// Create the half-edge structure of the mesh
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bool createHalfEdgeStructure();
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/// Compute the faces normals
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void computeFacesNormals();
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/// Compute the centroid of the polyhedron
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void computeCentroid() ;
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/// Compute and return the area of a face
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decimal getFaceArea(uint32 faceIndex) const;
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/// Static factory method to create a polyhedron mesh
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static PolyhedronMesh* create(PolygonVertexArray* polygonVertexArray, MemoryAllocator& polyhedronMeshAllocator, MemoryAllocator& dataAllocator);
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public:
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// -------------------- Methods -------------------- //
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/// Destructor
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~PolyhedronMesh();
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/// Return the number of vertices
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uint32 getNbVertices() const;
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/// Return a vertex
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Vector3 getVertex(uint32 index) const;
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/// Return the number of faces
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uint32 getNbFaces() const;
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/// Return a face normal
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Vector3 getFaceNormal(uint32 faceIndex) const;
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/// Return the half-edge structure of the mesh
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const HalfEdgeStructure& getHalfEdgeStructure() const;
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/// Return the centroid of the polyhedron
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Vector3 getCentroid() const;
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/// Compute and return the volume of the polyhedron
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decimal getVolume() const;
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// ---------- Friendship ---------- //
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friend class PhysicsCommon;
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};
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// Return the number of vertices
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/**
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* @return The number of vertices in the mesh
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*/
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RP3D_FORCE_INLINE uint32 PolyhedronMesh::getNbVertices() const {
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return mHalfEdgeStructure.getNbVertices();
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}
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// Return the number of faces
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/**
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* @return The number of faces in the mesh
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*/
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RP3D_FORCE_INLINE uint32 PolyhedronMesh::getNbFaces() const {
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return mHalfEdgeStructure.getNbFaces();
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}
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// Return a face normal
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/**
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* @param faceIndex The index of a given face of the mesh
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* @return The normal vector of a given face of the mesh
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*/
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RP3D_FORCE_INLINE Vector3 PolyhedronMesh::getFaceNormal(uint32 faceIndex) const {
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assert(faceIndex < mHalfEdgeStructure.getNbFaces());
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return mFacesNormals[faceIndex];
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}
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// Return the half-edge structure of the mesh
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/**
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* @return The Half-Edge structure of the mesh
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*/
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RP3D_FORCE_INLINE const HalfEdgeStructure& PolyhedronMesh::getHalfEdgeStructure() const {
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return mHalfEdgeStructure;
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}
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// Return the centroid of the polyhedron
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/**
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* @return The centroid of the mesh
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*/
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RP3D_FORCE_INLINE Vector3 PolyhedronMesh::getCentroid() const {
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return mCentroid;
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}
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}
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#endif
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