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thirdparty/ode-0.16.5/ode/demo/demo_cylvssphere.cpp
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thirdparty/ode-0.16.5/ode/demo/demo_cylvssphere.cpp
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/*************************************************************************
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* *
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* Open Dynamics Engine, Copyright (C) 2001,2002 Russell L. Smith. *
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* All rights reserved. Email: russ@q12.org Web: www.q12.org *
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* *
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* This library is free software; you can redistribute it and/or *
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* modify it under the terms of EITHER: *
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* (1) The GNU Lesser General Public License as published by the Free *
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* Software Foundation; either version 2.1 of the License, or (at *
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* your option) any later version. The text of the GNU Lesser *
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* General Public License is included with this library in the *
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* file LICENSE.TXT. *
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* (2) The BSD-style license that is included with this library in *
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* the file LICENSE-BSD.TXT. *
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* *
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* This library is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the files *
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* LICENSE.TXT and LICENSE-BSD.TXT for more details. *
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* *
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*************************************************************************/
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// Test for cylinder vs sphere, by Bram Stolk
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#include <ode/odeconfig.h>
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#include <assert.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <ode/ode.h>
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#include <drawstuff/drawstuff.h>
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#include "texturepath.h"
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#ifdef _MSC_VER
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#pragma warning(disable:4244 4305) // for VC++, no precision loss complaints
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#endif
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// dynamics and collision objects (chassis, 3 wheels, environment)
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static dWorldID world;
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static dSpaceID space;
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static dBodyID cylbody;
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static dGeomID cylgeom;
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static dBodyID sphbody;
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static dGeomID sphgeom;
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static dJointGroupID contactgroup;
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static bool show_contacts = true;
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#define CYLRADIUS 0.6
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#define CYLLENGTH 2.0
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#define SPHERERADIUS 0.5
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#ifdef dDOUBLE
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#define dsDrawBox dsDrawBoxD
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#define dsDrawLine dsDrawLineD
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#endif
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// this is called by dSpaceCollide when two objects in space are
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// potentially colliding.
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static void nearCallback (void *data, dGeomID o1, dGeomID o2)
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{
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assert(o1);
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assert(o2);
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if (dGeomIsSpace(o1) || dGeomIsSpace(o2))
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{
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fprintf(stderr,"testing space %p %p\n", (void*)o1, (void*)o2);
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// colliding a space with something
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dSpaceCollide2(o1,o2,data,&nearCallback);
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// Note we do not want to test intersections within a space,
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// only between spaces.
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return;
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}
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const int N = 32;
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dContact contact[N];
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int n = dCollide (o1,o2,N,&(contact[0].geom),sizeof(dContact));
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if (n > 0)
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{
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for (int i=0; i<n; i++)
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{
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contact[i].surface.mode = 0;
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contact[i].surface.mu = 50.0; // was: dInfinity
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dJointID c = dJointCreateContact (world,contactgroup,&contact[i]);
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dJointAttach (c, dGeomGetBody(contact[i].geom.g1), dGeomGetBody(contact[i].geom.g2));
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if (show_contacts)
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{
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dMatrix3 RI;
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dRSetIdentity (RI);
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const dReal ss[3] = {0.12,0.12,0.12};
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dsSetColorAlpha (0,0,1,0.5);
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dsDrawBox (contact[i].geom.pos,RI,ss);
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dReal *pos = contact[i].geom.pos;
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dReal depth = contact[i].geom.depth;
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dReal *norm = contact[i].geom.normal;
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dReal endp[3] = {pos[0]+depth*norm[0], pos[1]+depth*norm[1], pos[2]+depth*norm[2]};
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dsSetColorAlpha (1,1,1,1);
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dsDrawLine (contact[i].geom.pos, endp);
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}
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}
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}
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}
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// start simulation - set viewpoint
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static void start()
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{
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dAllocateODEDataForThread(dAllocateMaskAll);
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static float xyz[3] = {-8,-9,3};
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static float hpr[3] = {45.0000f,-27.5000f,0.0000f};
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dsSetViewpoint (xyz,hpr);
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}
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// called when a key pressed
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static void command (int cmd)
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{
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switch (cmd)
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{
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case ' ':
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break;
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}
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}
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// simulation loop
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static void simLoop (int pause)
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{
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dSpaceCollide (space,0,&nearCallback);
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if (!pause)
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{
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dWorldQuickStep (world, 0.01); // 100 Hz
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}
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dJointGroupEmpty (contactgroup);
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dsSetColorAlpha (1,1,0,0.5);
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const dReal *CPos = dBodyGetPosition(cylbody);
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const dReal *CRot = dBodyGetRotation(cylbody);
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float cpos[3] = {CPos[0], CPos[1], CPos[2]};
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float crot[12] = { CRot[0], CRot[1], CRot[2], CRot[3], CRot[4], CRot[5], CRot[6], CRot[7], CRot[8], CRot[9], CRot[10], CRot[11] };
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dsDrawCylinder
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(
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cpos,
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crot,
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CYLLENGTH,
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CYLRADIUS
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); // single precision
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const dReal *SPos = dBodyGetPosition(sphbody);
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const dReal *SRot = dBodyGetRotation(sphbody);
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float spos[3] = {SPos[0], SPos[1], SPos[2]};
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float srot[12] = { SRot[0], SRot[1], SRot[2], SRot[3], SRot[4], SRot[5], SRot[6], SRot[7], SRot[8], SRot[9], SRot[10], SRot[11] };
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dsDrawSphere
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(
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spos,
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srot,
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SPHERERADIUS
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); // single precision
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}
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int main (int argc, char **argv)
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{
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dMass m;
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// setup pointers to drawstuff callback functions
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dsFunctions fn;
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fn.version = DS_VERSION;
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fn.start = &start;
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fn.step = &simLoop;
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fn.command = &command;
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fn.stop = 0;
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fn.path_to_textures = DRAWSTUFF_TEXTURE_PATH;
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// create world
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dInitODE2(0);
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world = dWorldCreate();
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space = dHashSpaceCreate (0);
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contactgroup = dJointGroupCreate (0);
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dWorldSetGravity (world,0,0,-9.8);
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dWorldSetQuickStepNumIterations (world, 32);
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dCreatePlane (space,0,0,1, 0.0);
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cylbody = dBodyCreate (world);
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dQuaternion q;
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#if 0
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dQFromAxisAndAngle (q,1,0,0,M_PI*0.5);
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#else
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// dQFromAxisAndAngle (q,1,0,0, M_PI * 1.0);
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dQFromAxisAndAngle (q,1,0,0, M_PI * -0.77);
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#endif
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dBodySetQuaternion (cylbody,q);
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dMassSetCylinder (&m,1.0,3,CYLRADIUS,CYLLENGTH);
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dBodySetMass (cylbody,&m);
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cylgeom = dCreateCylinder(0, CYLRADIUS, CYLLENGTH);
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dGeomSetBody (cylgeom,cylbody);
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dBodySetPosition (cylbody, 0, 0, 3);
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dSpaceAdd (space, cylgeom);
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sphbody = dBodyCreate (world);
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dMassSetSphere (&m,1,SPHERERADIUS);
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dBodySetMass (sphbody,&m);
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sphgeom = dCreateSphere(0, SPHERERADIUS);
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dGeomSetBody (sphgeom,sphbody);
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dBodySetPosition (sphbody, 0, 0, 5.5);
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dSpaceAdd (space, sphgeom);
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// run simulation
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dsSimulationLoop (argc,argv,352,288,&fn);
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dJointGroupEmpty (contactgroup);
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dJointGroupDestroy (contactgroup);
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dGeomDestroy(sphgeom);
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dGeomDestroy (cylgeom);
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dSpaceDestroy (space);
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dWorldDestroy (world);
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dCloseODE();
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return 0;
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}
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