Engine/lib/bullet/src/BulletSoftBody/btSoftBodyHelpers.h

   1 /*
   2 Bullet Continuous Collision Detection and Physics Library
   3 Copyright (c) 2003-2008 Erwin Coumans  http://continuousphysics.com/Bullet/
   4
   5 This software is provided 'as-is', without any express or implied warranty.
   6 In no event will the authors be held liable for any damages arising from the use of this software.
   7 Permission is granted to anyone to use this software for any purpose,
   8 including commercial applications, and to alter it and redistribute it freely,
   9 subject to the following restrictions:
  10
  11 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.
  12 2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
  13 3. This notice may not be removed or altered from any source distribution.
  14 */
  15
  16 #ifndef BT_SOFT_BODY_HELPERS_H
  17 #define BT_SOFT_BODY_HELPERS_H
  18
  19 #include "btSoftBody.h"
  20
  21 //
  22 // Helpers
  23 //
  24
  25 /* fDrawFlags                                                                                                                   */
  26 struct  fDrawFlags { enum _ {
  27         Nodes           =       0x0001,
  28         Links           =       0x0002,
  29         Faces           =       0x0004,
  30         Tetras          =       0x0008,
  31         Normals         =       0x0010,
  32         Contacts        =       0x0020,
  33         Anchors         =       0x0040,
  34         Notes           =       0x0080,
  35         Clusters        =       0x0100,
  36         NodeTree        =       0x0200,
  37         FaceTree        =       0x0400,
  38         ClusterTree     =       0x0800,
  39         Joints          =       0x1000,
  40         /* presets      */
  41         Std                     =       Links+Faces+Tetras+Anchors+Notes+Joints,
  42         StdTetra        =       Std-Faces+Tetras
  43 };};
  44
  45 struct  btSoftBodyHelpers
  46 {
  47         /* Draw body                                                                                                                    */
  48         static void                             Draw(           btSoftBody* psb,
  49                 btIDebugDraw* idraw,
  50                 int drawflags=fDrawFlags::Std);
  51         /* Draw body infos                                                                                                              */
  52         static  void                    DrawInfos(      btSoftBody* psb,
  53                 btIDebugDraw* idraw,
  54                 bool masses,
  55                 bool areas,
  56                 bool stress);
  57         /* Draw node tree                                                                                                               */
  58         static void                             DrawNodeTree(   btSoftBody* psb,
  59                 btIDebugDraw* idraw,
  60                 int mindepth=0,
  61                 int maxdepth=-1);
  62         /* Draw face tree                                                                                                               */
  63         static void                             DrawFaceTree(   btSoftBody* psb,
  64                 btIDebugDraw* idraw,
  65                 int mindepth=0,
  66                 int maxdepth=-1);
  67         /* Draw cluster tree                                                                                                    */
  68         static void                             DrawClusterTree(btSoftBody* psb,
  69                 btIDebugDraw* idraw,
  70                 int mindepth=0,
  71                 int maxdepth=-1);
  72         /* Draw rigid frame                                                                                                             */
  73         static  void                    DrawFrame(              btSoftBody* psb,
  74                 btIDebugDraw* idraw);
  75         /* Create a rope                                                                                                                */
  76         static  btSoftBody*             CreateRope( btSoftBodyWorldInfo& worldInfo,
  77                 const btVector3& from,
  78                 const btVector3& to,
  79                 int res,
  80                 int fixeds);
  81         /* Create a patch                                                                                                               */
  82         static  btSoftBody*             CreatePatch(btSoftBodyWorldInfo& worldInfo,
  83                 const btVector3& corner00,
  84                 const btVector3& corner10,
  85                 const btVector3& corner01,
  86                 const btVector3& corner11,
  87                 int resx,
  88                 int resy,
  89                 int fixeds,
  90                 bool gendiags);
  91         /* Create a patch with UV Texture Coordinates   */
  92         static  btSoftBody*             CreatePatchUV(btSoftBodyWorldInfo& worldInfo,
  93                 const btVector3& corner00,
  94                 const btVector3& corner10,
  95                 const btVector3& corner01,
  96                 const btVector3& corner11,
  97                 int resx,
  98                 int resy,
  99                 int fixeds,
 100                 bool gendiags,
 101                 float* tex_coords=0);
 102         static  float   CalculateUV(int resx,int resy,int ix,int iy,int id);
 103         /* Create an ellipsoid                                                                                                  */
 104         static  btSoftBody*             CreateEllipsoid(btSoftBodyWorldInfo& worldInfo,
 105                 const btVector3& center,
 106                 const btVector3& radius,
 107                 int res);
 108         /* Create from trimesh                                                                                                  */
 109         static  btSoftBody*             CreateFromTriMesh(      btSoftBodyWorldInfo& worldInfo,
 110                 const btScalar* vertices,
 111                 const int* triangles,
 112                 int ntriangles,
 113                 bool randomizeConstraints = true);
 114         /* Create from convex-hull                                                                                              */
 115         static  btSoftBody*             CreateFromConvexHull(   btSoftBodyWorldInfo& worldInfo,
 116                 const btVector3* vertices,
 117                 int nvertices,
 118                 bool randomizeConstraints = true);
 119
 120
 121         /* Export TetGen compatible .smesh file                                                                 */
 122 //      static void                             ExportAsSMeshFile(      btSoftBody* psb,
 123 //                                                                                              const char* filename);
 124         /* Create from TetGen .ele, .face, .node files                                                  */
 125 //      static btSoftBody*              CreateFromTetGenFile(   btSoftBodyWorldInfo& worldInfo,
 126 //                                                                                                      const char* ele,
 127 //                                                                                                      const char* face,
 128 //                                                                                                      const char* node,
 129 //                                                                                                      bool bfacelinks,
 130 //                                                                                                      bool btetralinks,
 131 //                                                                                                      bool bfacesfromtetras);
 132         /* Create from TetGen .ele, .face, .node data                                                   */
 133         static btSoftBody*              CreateFromTetGenData(   btSoftBodyWorldInfo& worldInfo,
 134                                                                                                         const char* ele,
 135                                                                                                         const char* face,
 136                                                                                                         const char* node,
 137                                                                                                         bool bfacelinks,
 138                                                                                                         bool btetralinks,
 139                                                                                                         bool bfacesfromtetras);
 140
 141         /// Sort the list of links to move link calculations that are dependent upon earlier
 142         /// ones as far as possible away from the calculation of those values
 143         /// This tends to make adjacent loop iterations not dependent upon one another,
 144         /// so out-of-order processors can execute instructions from multiple iterations at once
 145         static void ReoptimizeLinkOrder(btSoftBody *psb );
 146 };
 147
 148 #endif //BT_SOFT_BODY_HELPERS_H