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Diffstat (limited to 'extern/bullet2/LinearMath/btConvexHull.h')
| -rw-r--r-- | extern/bullet2/LinearMath/btConvexHull.h | 241 |
1 files changed, 0 insertions, 241 deletions
diff --git a/extern/bullet2/LinearMath/btConvexHull.h b/extern/bullet2/LinearMath/btConvexHull.h deleted file mode 100644 index a23fa4d550f..00000000000 --- a/extern/bullet2/LinearMath/btConvexHull.h +++ /dev/null @@ -1,241 +0,0 @@ - -/* -Stan Melax Convex Hull Computation -Copyright (c) 2008 Stan Melax http://www.melax.com/ - -This software is provided 'as-is', without any express or implied warranty. -In no event will the authors be held liable for any damages arising from the use of this software. -Permission is granted to anyone to use this software for any purpose, -including commercial applications, and to alter it and redistribute it freely, -subject to the following restrictions: - -1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required. -2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software. -3. This notice may not be removed or altered from any source distribution. -*/ - -///includes modifications/improvements by John Ratcliff, see BringOutYourDead below. - -#ifndef CD_HULL_H -#define CD_HULL_H - -#include "btVector3.h" -#include "btAlignedObjectArray.h" - -typedef btAlignedObjectArray<unsigned int> TUIntArray; - -class HullResult -{ -public: - HullResult(void) - { - mPolygons = true; - mNumOutputVertices = 0; - mNumFaces = 0; - mNumIndices = 0; - } - bool mPolygons; // true if indices represents polygons, false indices are triangles - unsigned int mNumOutputVertices; // number of vertices in the output hull - btAlignedObjectArray<btVector3> m_OutputVertices; // array of vertices - unsigned int mNumFaces; // the number of faces produced - unsigned int mNumIndices; // the total number of indices - btAlignedObjectArray<unsigned int> m_Indices; // pointer to indices. - -// If triangles, then indices are array indexes into the vertex list. -// If polygons, indices are in the form (number of points in face) (p1, p2, p3, ..) etc.. -}; - -enum HullFlag -{ - QF_TRIANGLES = (1<<0), // report results as triangles, not polygons. - QF_REVERSE_ORDER = (1<<1), // reverse order of the triangle indices. - QF_DEFAULT = QF_TRIANGLES -}; - - -class HullDesc -{ -public: - HullDesc(void) - { - mFlags = QF_DEFAULT; - mVcount = 0; - mVertices = 0; - mVertexStride = sizeof(btVector3); - mNormalEpsilon = 0.001f; - mMaxVertices = 4096; // maximum number of points to be considered for a convex hull. - mMaxFaces = 4096; - }; - - HullDesc(HullFlag flag, - unsigned int vcount, - const btVector3 *vertices, - unsigned int stride = sizeof(btVector3)) - { - mFlags = flag; - mVcount = vcount; - mVertices = vertices; - mVertexStride = stride; - mNormalEpsilon = btScalar(0.001); - mMaxVertices = 4096; - } - - bool HasHullFlag(HullFlag flag) const - { - if ( mFlags & flag ) return true; - return false; - } - - void SetHullFlag(HullFlag flag) - { - mFlags|=flag; - } - - void ClearHullFlag(HullFlag flag) - { - mFlags&=~flag; - } - - unsigned int mFlags; // flags to use when generating the convex hull. - unsigned int mVcount; // number of vertices in the input point cloud - const btVector3 *mVertices; // the array of vertices. - unsigned int mVertexStride; // the stride of each vertex, in bytes. - btScalar mNormalEpsilon; // the epsilon for removing duplicates. This is a normalized value, if normalized bit is on. - unsigned int mMaxVertices; // maximum number of vertices to be considered for the hull! - unsigned int mMaxFaces; -}; - -enum HullError -{ - QE_OK, // success! - QE_FAIL // failed. -}; - -class btPlane -{ - public: - btVector3 normal; - btScalar dist; // distance below origin - the D from plane equasion Ax+By+Cz+D=0 - btPlane(const btVector3 &n,btScalar d):normal(n),dist(d){} - btPlane():normal(),dist(0){} - -}; - - - -class ConvexH -{ - public: - class HalfEdge - { - public: - short ea; // the other half of the edge (index into edges list) - unsigned char v; // the vertex at the start of this edge (index into vertices list) - unsigned char p; // the facet on which this edge lies (index into facets list) - HalfEdge(){} - HalfEdge(short _ea,unsigned char _v, unsigned char _p):ea(_ea),v(_v),p(_p){} - }; - ConvexH() - { - } - ~ConvexH() - { - } - btAlignedObjectArray<btVector3> vertices; - btAlignedObjectArray<HalfEdge> edges; - btAlignedObjectArray<btPlane> facets; - ConvexH(int vertices_size,int edges_size,int facets_size); -}; - - -class int4 -{ -public: - int x,y,z,w; - int4(){}; - int4(int _x,int _y, int _z,int _w){x=_x;y=_y;z=_z;w=_w;} - const int& operator[](int i) const {return (&x)[i];} - int& operator[](int i) {return (&x)[i];} -}; - -class PHullResult -{ -public: - - PHullResult(void) - { - mVcount = 0; - mIndexCount = 0; - mFaceCount = 0; - mVertices = 0; - } - - unsigned int mVcount; - unsigned int mIndexCount; - unsigned int mFaceCount; - btVector3* mVertices; - TUIntArray m_Indices; -}; - - - -///The HullLibrary class can create a convex hull from a collection of vertices, using the ComputeHull method. -///The btShapeHull class uses this HullLibrary to create a approximate convex mesh given a general (non-polyhedral) convex shape. -class HullLibrary -{ - - btAlignedObjectArray<class btHullTriangle*> m_tris; - -public: - - btAlignedObjectArray<int> m_vertexIndexMapping; - - - HullError CreateConvexHull(const HullDesc& desc, // describes the input request - HullResult& result); // contains the resulst - HullError ReleaseResult(HullResult &result); // release memory allocated for this result, we are done with it. - -private: - - bool ComputeHull(unsigned int vcount,const btVector3 *vertices,PHullResult &result,unsigned int vlimit); - - class btHullTriangle* allocateTriangle(int a,int b,int c); - void deAllocateTriangle(btHullTriangle*); - void b2bfix(btHullTriangle* s,btHullTriangle*t); - - void removeb2b(btHullTriangle* s,btHullTriangle*t); - - void checkit(btHullTriangle *t); - - btHullTriangle* extrudable(btScalar epsilon); - - int calchull(btVector3 *verts,int verts_count, TUIntArray& tris_out, int &tris_count,int vlimit); - - int calchullgen(btVector3 *verts,int verts_count, int vlimit); - - int4 FindSimplex(btVector3 *verts,int verts_count,btAlignedObjectArray<int> &allow); - - class ConvexH* ConvexHCrop(ConvexH& convex,const btPlane& slice); - - void extrude(class btHullTriangle* t0,int v); - - ConvexH* test_cube(); - - //BringOutYourDead (John Ratcliff): When you create a convex hull you hand it a large input set of vertices forming a 'point cloud'. - //After the hull is generated it give you back a set of polygon faces which index the *original* point cloud. - //The thing is, often times, there are many 'dead vertices' in the point cloud that are on longer referenced by the hull. - //The routine 'BringOutYourDead' find only the referenced vertices, copies them to an new buffer, and re-indexes the hull so that it is a minimal representation. - void BringOutYourDead(const btVector3* verts,unsigned int vcount, btVector3* overts,unsigned int &ocount,unsigned int* indices,unsigned indexcount); - - bool CleanupVertices(unsigned int svcount, - const btVector3* svertices, - unsigned int stride, - unsigned int &vcount, // output number of vertices - btVector3* vertices, // location to store the results. - btScalar normalepsilon, - btVector3& scale); -}; - - -#endif - |