btSoftBodyHelpers.h

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/*
Bullet Continuous Collision Detection and Physics Library
Copyright (c) 2003-2008 Erwin Coumans  http://continuousphysics.com/Bullet/
 
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.
*/
 
#ifndef BT_SOFT_BODY_HELPERS_H
#define BT_SOFT_BODY_HELPERS_H
 
#include "btSoftBody.h"
 
//
// Helpers
//
 
/* fDrawFlags                                                                                                                   */ 
struct  fDrawFlags { enum _ {
        Nodes           =       0x0001,
        Links           =       0x0002,
        Faces           =       0x0004,
        Tetras          =       0x0008,
        Normals         =       0x0010,
        Contacts        =       0x0020,
        Anchors         =       0x0040,
        Notes           =       0x0080,
        Clusters        =       0x0100,
        NodeTree        =       0x0200,
        FaceTree        =       0x0400,
        ClusterTree     =       0x0800,
        Joints          =       0x1000,
        /* presets      */ 
        Std                     =       Links+Faces+Tetras+Anchors+Notes+Joints,
        StdTetra        =       Std-Faces+Tetras
};};
 
struct  btSoftBodyHelpers
{
        /* Draw body                                                                                                                    */ 
        static void                             Draw(           btSoftBody* psb,
                btIDebugDraw* idraw,
                int drawflags=fDrawFlags::Std);
        /* Draw body infos                                                                                                              */ 
        static  void                    DrawInfos(      btSoftBody* psb,
                btIDebugDraw* idraw,
                bool masses,
                bool areas,
                bool stress);
        /* Draw node tree                                                                                                               */ 
        static void                             DrawNodeTree(   btSoftBody* psb,
                btIDebugDraw* idraw,
                int mindepth=0,
                int maxdepth=-1);
        /* Draw face tree                                                                                                               */ 
        static void                             DrawFaceTree(   btSoftBody* psb,
                btIDebugDraw* idraw,
                int mindepth=0,
                int maxdepth=-1);
        /* Draw cluster tree                                                                                                    */ 
        static void                             DrawClusterTree(btSoftBody* psb,
                btIDebugDraw* idraw,
                int mindepth=0,
                int maxdepth=-1);
        /* Draw rigid frame                                                                                                             */ 
        static  void                    DrawFrame(              btSoftBody* psb,
                btIDebugDraw* idraw);
        /* Create a rope                                                                                                                */ 
        static  btSoftBody*             CreateRope( btSoftBodyWorldInfo& worldInfo,
                const btVector3& from,
                const btVector3& to,
                int res,
                int fixeds);
        /* Create a patch                                                                                                               */ 
        static  btSoftBody*             CreatePatch(btSoftBodyWorldInfo& worldInfo,
                const btVector3& corner00,
                const btVector3& corner10,
                const btVector3& corner01,
                const btVector3& corner11,
                int resx,
                int resy,
                int fixeds,
                bool gendiags);
        /* Create a patch with UV Texture Coordinates   */ 
        static  btSoftBody*             CreatePatchUV(btSoftBodyWorldInfo& worldInfo,
                const btVector3& corner00,
                const btVector3& corner10,
                const btVector3& corner01,
                const btVector3& corner11,
                int resx,
                int resy,
                int fixeds,
                bool gendiags,
                float* tex_coords=0);
        static  float   CalculateUV(int resx,int resy,int ix,int iy,int id);
        /* Create an ellipsoid                                                                                                  */ 
        static  btSoftBody*             CreateEllipsoid(btSoftBodyWorldInfo& worldInfo,
                const btVector3& center,
                const btVector3& radius,
                int res);       
        /* Create from trimesh                                                                                                  */ 
        static  btSoftBody*             CreateFromTriMesh(      btSoftBodyWorldInfo& worldInfo,
                const btScalar* vertices,
                const int* triangles,
                int ntriangles,
                bool randomizeConstraints = true);
        /* Create from convex-hull                                                                                              */ 
        static  btSoftBody*             CreateFromConvexHull(   btSoftBodyWorldInfo& worldInfo,
                const btVector3* vertices,
                int nvertices,
                bool randomizeConstraints = true);
 
 
        /* Export TetGen compatible .smesh file                                                                 */ 
//      static void                             ExportAsSMeshFile(      btSoftBody* psb,
//                                                                                              const char* filename);  
        /* Create from TetGen .ele, .face, .node files                                                  */ 
//      static btSoftBody*              CreateFromTetGenFile(   btSoftBodyWorldInfo& worldInfo,
//                                                                                                      const char* ele,
//                                                                                                      const char* face,
//                                                                                                      const char* node,
//                                                                                                      bool bfacelinks,
//                                                                                                      bool btetralinks,
//                                                                                                      bool bfacesfromtetras);
        /* Create from TetGen .ele, .face, .node data                                                   */ 
        static btSoftBody*              CreateFromTetGenData(   btSoftBodyWorldInfo& worldInfo,
                                                                                                        const char* ele,
                                                                                                        const char* face,
                                                                                                        const char* node,
                                                                                                        bool bfacelinks,
                                                                                                        bool btetralinks,
                                                                                                        bool bfacesfromtetras);
 
        static void ReoptimizeLinkOrder(btSoftBody *psb );
};
 
#endif //BT_SOFT_BODY_HELPERS_H