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/*************************************************************************
* *
* Open Dynamics Engine, Copyright (C) 2001,2002 Russell L. Smith. *
* All rights reserved. Email: russ@q12.org Web: www.q12.org *
* *
* This library is free software; you can redistribute it and/or *
* modify it under the terms of EITHER: *
* (1) The GNU Lesser General Public License as published by the Free *
* Software Foundation; either version 2.1 of the License, or (at *
* your option) any later version. The text of the GNU Lesser *
* General Public License is included with this library in the *
* file LICENSE.TXT. *
* (2) The BSD-style license that is included with this library in *
* the file LICENSE-BSD.TXT. *
* *
* This library is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the files *
* LICENSE.TXT and LICENSE-BSD.TXT for more details. *
* *
*************************************************************************/
/* exercise the C interface */
#include <stdio.h>
#include "ode/ode.h"
#include "drawstuff/drawstuff.h"
#ifdef _MSC_VER
#pragma warning(disable:4244 4305) // for VC++, no precision loss complaints
#endif
/* select correct drawing functions */
#ifdef dDOUBLE
#define dsDrawBox dsDrawBoxD
#define dsDrawSphere dsDrawSphereD
#define dsDrawCylinder dsDrawCylinderD
#define dsDrawCapsule dsDrawCapsuleD
#endif
/* some constants */
#define NUM 10 /* number of boxes */
#define SIDE (0.2) /* side length of a box */
#define MASS (1.0) /* mass of a box */
#define RADIUS (0.1732f) /* sphere radius */
/* dynamics and collision objects */
static dWorldID world;
static dSpaceID space;
static dBodyID body[NUM];
static dJointID joint[NUM-1];
static dJointGroupID contactgroup;
static dGeomID sphere[NUM];
/* this is called by dSpaceCollide when two objects in space are
* potentially colliding.
*/
static void nearCallback (void *data, dGeomID o1, dGeomID o2)
{
/* exit without doing anything if the two bodies are connected by a joint */
dBodyID b1,b2;
dContact contact;
b1 = dGeomGetBody(o1);
b2 = dGeomGetBody(o2);
if (b1 && b2 && dAreConnected (b1,b2)) return;
contact.surface.mode = 0;
contact.surface.mu = 0.1;
contact.surface.mu2 = 0;
if (dCollide (o1,o2,1,&contact.geom,sizeof(dContactGeom))) {
dJointID c = dJointCreateContact (world,contactgroup,&contact);
dJointAttach (c,b1,b2);
}
}
/* start simulation - set viewpoint */
static void start()
{
static float xyz[3] = {2.1640f,-1.3079f,1.7600f};
static float hpr[3] = {125.5000f,-17.0000f,0.0000f};
dsSetViewpoint (xyz,hpr);
}
/* simulation loop */
static void simLoop (int pause)
{
int i;
if (!pause) {
static double angle = 0;
angle += 0.05;
dBodyAddForce (body[NUM-1],0,0,1.5*(sin(angle)+1.0));
dSpaceCollide (space,0,&nearCallback);
dWorldStep (world,0.05);
/* remove all contact joints */
dJointGroupEmpty (contactgroup);
}
dsSetColor (1,1,0);
dsSetTexture (DS_WOOD);
for (i=0; i<NUM; i++) dsDrawSphere (dBodyGetPosition(body[i]),
dBodyGetRotation(body[i]),RADIUS);
}
int main (int argc, char **argv)
{
int i;
dReal k;
dMass m;
/* setup pointers to drawstuff callback functions */
dsFunctions fn;
fn.version = DS_VERSION;
fn.start = &start;
fn.step = &simLoop;
fn.command = 0;
fn.stop = 0;
fn.path_to_textures = "../../drawstuff/textures";
if(argc==2)
{
fn.path_to_textures = argv[1];
}
/* create world */
dInitODE();
world = dWorldCreate();
space = dHashSpaceCreate (0);
contactgroup = dJointGroupCreate (1000000);
dWorldSetGravity (world,0,0,-0.5);
dCreatePlane (space,0,0,1,0);
for (i=0; i<NUM; i++) {
body[i] = dBodyCreate (world);
k = i*SIDE;
dBodySetPosition (body[i],k,k,k+0.4);
dMassSetBox (&m,1,SIDE,SIDE,SIDE);
dMassAdjust (&m,MASS);
dBodySetMass (body[i],&m);
sphere[i] = dCreateSphere (space,RADIUS);
dGeomSetBody (sphere[i],body[i]);
}
for (i=0; i<(NUM-1); i++) {
joint[i] = dJointCreateBall (world,0);
dJointAttach (joint[i],body[i],body[i+1]);
k = (i+0.5)*SIDE;
dJointSetBallAnchor (joint[i],k,k,k+0.4);
}
/* run simulation */
dsSimulationLoop (argc,argv,352,288,&fn);
dJointGroupDestroy (contactgroup);
dSpaceDestroy (space);
dWorldDestroy (world);
dCloseODE();
return 0;
}
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