from the start... checking in ode-0.9

1 files changed, 435 insertions, 0 deletions

diff --git a/libraries/ode-0.9/ode/demo/demo_space_stress.cpp b/libraries/ode-0.9/ode/demo/demo_space_stress.cpp
new file mode 100644
index 0000000..e1be369
--- /dev/null
+++ b/libraries/ode-0.9/ode/demo/demo_space_stress.cpp
@@ -0,0 +1,435 @@
+/*************************************************************************
+ *                                                                       *
+ * Open Dynamics Engine, Copyright (C) 2001-2003 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.                     *
+ *                                                                       *
+ *************************************************************************/
+
+#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 10000                       // max number of objects
+#define DENSITY (5.0)           // density of all objects
+#define GPB 3                   // maximum number of geometries per body
+#define MAX_CONTACTS 4          // maximum number of contact points per body
+#define WORLD_SIZE 100
+
+
+// dynamics and collision objects
+
+struct MyObject {
+  dBodyID body;                 // the body
+  dGeomID geom[GPB];            // geometries representing this body
+};
+
+static int num=0;               // number of objects in simulation
+static int nextobj=0;           // next object to recycle if num==NUM
+static dWorldID world;
+static dSpaceID space;
+static MyObject obj[NUM];
+static dJointGroupID contactgroup;
+static int selected = -1;       // selected object
+static int show_aabb = 0;       // show geom AABBs?
+static int show_contacts = 0;   // show contact points?
+static int random_pos = 1;      // drop objects from random position?
+static int draw_geom = 1;
+
+
+// this is called by dSpaceCollide when two objects in space are
+// potentially colliding.
+
+static void nearCallback (void *data, dGeomID o1, dGeomID o2)
+{
+  int i;
+  // if (o1->body && o2->body) return;
+
+  // exit without doing anything if the two bodies are connected by a joint
+  dBodyID b1 = dGeomGetBody(o1);
+  dBodyID b2 = dGeomGetBody(o2);
+  if (b1 && b2 && dAreConnectedExcluding (b1,b2,dJointTypeContact)) return;
+
+  dContact contact[MAX_CONTACTS];   // up to MAX_CONTACTS contacts per box-box
+  for (i=0; i<MAX_CONTACTS; i++) {
+    contact[i].surface.mode = dContactBounce | dContactSoftCFM;
+    contact[i].surface.mu = dInfinity;
+    contact[i].surface.mu2 = 0;
+    contact[i].surface.bounce = 0.1;
+    contact[i].surface.bounce_vel = 0.1;
+    contact[i].surface.soft_cfm = 0.01;
+  }
+  if (int numc = dCollide (o1,o2,MAX_CONTACTS,&contact[0].geom,
+                           sizeof(dContact))) {
+    dMatrix3 RI;
+    dRSetIdentity (RI);
+    const dReal ss[3] = {0.02,0.02,0.02};
+    for (i=0; i<numc; i++) {
+      dJointID c = dJointCreateContact (world,contactgroup,contact+i);
+      dJointAttach (c,b1,b2);
+      if (show_contacts) dsDrawBox (contact[i].geom.pos,RI,ss);
+    }
+  }
+}
+
+
+// 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);
+  printf ("To drop another object, press:\n");
+  printf ("   o to disable rendering.\n");
+  printf ("   b for box.\n");
+  printf ("   s for sphere.\n");
+  printf ("   c for cylinder.\n");
+  printf ("   x for a composite object.\n");
+  printf ("To select an object, press space.\n");
+  printf ("To disable the selected object, press d.\n");
+  printf ("To enable the selected object, press e.\n");
+  printf ("To toggle showing the geom AABBs, press a.\n");
+  printf ("To toggle showing the contact points, press t.\n");
+  printf ("To toggle dropping from random position/orientation, press r.\n");
+}
+
+
+char locase (char c)
+{
+  if (c >= 'A' && c <= 'Z') return c - ('a'-'A');
+  else return c;
+}
+
+
+// called when a key pressed
+
+static void command (int cmd)
+{
+  int i,j,k;
+  dReal sides[3];
+  dMass m;
+
+  cmd = locase (cmd);
+  if (cmd == 'b' || cmd == 's' || cmd == 'c' || cmd == 'x'
+      /* || cmd == 'l' */) {
+    if (num < NUM) {
+      i = num;
+      num++;
+    }
+    else {
+      i = nextobj;
+      nextobj++;
+      if (nextobj >= num) nextobj = 0;
+
+      // destroy the body and geoms for slot i
+      dBodyDestroy (obj[i].body);
+      for (k=0; k < GPB; k++) {
+        if (obj[i].geom[k]) dGeomDestroy (obj[i].geom[k]);
+      }
+      memset (&obj[i],0,sizeof(obj[i]));
+    }
+
+    obj[i].body = dBodyCreate (world);
+    for (k=0; k<3; k++) sides[k] = dRandReal()*0.5+0.1;
+
+    dMatrix3 R;
+    if (random_pos) {
+      dBodySetPosition (obj[i].body,
+                        dRandReal()*WORLD_SIZE-(WORLD_SIZE/2),dRandReal()*WORLD_SIZE-(WORLD_SIZE/2),dRandReal()+1);
+      dRFromAxisAndAngle (R,dRandReal()*2.0-1.0,dRandReal()*2.0-1.0,
+                          dRandReal()*2.0-1.0,dRandReal()*10.0-5.0);
+    }
+    else {
+      dReal maxheight = 0;
+      for (k=0; k<num; k++) {
+        const dReal *pos = dBodyGetPosition (obj[k].body);
+        if (pos[2] > maxheight) maxheight = pos[2];
+      }
+      dBodySetPosition (obj[i].body, 0,0,maxheight+1);
+      dRFromAxisAndAngle (R,0,0,1,dRandReal()*10.0-5.0);
+    }
+    dBodySetRotation (obj[i].body,R);
+    dBodySetData (obj[i].body,(void*)(size_t)i);
+
+    if (cmd == 'b') {
+      dMassSetBox (&m,DENSITY,sides[0],sides[1],sides[2]);
+      obj[i].geom[0] = dCreateBox (space,sides[0],sides[1],sides[2]);
+    }
+    else if (cmd == 'c') {
+      sides[0] *= 0.5;
+      dMassSetCapsule (&m,DENSITY,3,sides[0],sides[1]);
+      obj[i].geom[0] = dCreateCapsule (space,sides[0],sides[1]);
+    }
+/*
+    // cylinder option not yet implemented
+    else if (cmd == 'l') {
+      sides[1] *= 0.5;
+      dMassSetCapsule (&m,DENSITY,3,sides[0],sides[1]);
+      obj[i].geom[0] = dCreateCylinder (space,sides[0],sides[1]);
+    }
+*/
+    else if (cmd == 's') {
+      sides[0] *= 0.5;
+      dMassSetSphere (&m,DENSITY,sides[0]);
+      obj[i].geom[0] = dCreateSphere (space,sides[0]);
+    }
+    else if (cmd == 'x') {
+      dGeomID g2[GPB];          // encapsulated geometries
+      dReal dpos[GPB][3];       // delta-positions for encapsulated geometries
+
+      // start accumulating masses for the encapsulated geometries
+      dMass m2;
+      dMassSetZero (&m);
+
+      // set random delta positions
+      for (j=0; j<GPB; j++) {
+        for (k=0; k<3; k++) dpos[j][k] = dRandReal()*0.3-0.15;
+      }
+
+      for (k=0; k<GPB; k++) {
+        obj[i].geom[k] = dCreateGeomTransform (space);
+        dGeomTransformSetCleanup (obj[i].geom[k],1);
+        if (k==0) {
+          dReal radius = dRandReal()*0.25+0.05;
+          g2[k] = dCreateSphere (0,radius);
+          dMassSetSphere (&m2,DENSITY,radius);
+        }
+        else if (k==1) {
+          g2[k] = dCreateBox (0,sides[0],sides[1],sides[2]);
+          dMassSetBox (&m2,DENSITY,sides[0],sides[1],sides[2]);
+        }
+        else {
+          dReal radius = dRandReal()*0.1+0.05;
+          dReal length = dRandReal()*1.0+0.1;
+          g2[k] = dCreateCapsule (0,radius,length);
+          dMassSetCapsule (&m2,DENSITY,3,radius,length);
+        }
+        dGeomTransformSetGeom (obj[i].geom[k],g2[k]);
+
+        // set the transformation (adjust the mass too)
+        dGeomSetPosition (g2[k],dpos[k][0],dpos[k][1],dpos[k][2]);
+        dMassTranslate (&m2,dpos[k][0],dpos[k][1],dpos[k][2]);
+        dMatrix3 Rtx;
+        dRFromAxisAndAngle (Rtx,dRandReal()*2.0-1.0,dRandReal()*2.0-1.0,
+                            dRandReal()*2.0-1.0,dRandReal()*10.0-5.0);
+        dGeomSetRotation (g2[k],Rtx);
+        dMassRotate (&m2,Rtx);
+
+        // add to the total mass
+        dMassAdd (&m,&m2);
+      }
+
+      // move all encapsulated objects so that the center of mass is (0,0,0)
+      for (k=0; k<2; k++) {
+        dGeomSetPosition (g2[k],
+                          dpos[k][0]-m.c[0],
+                          dpos[k][1]-m.c[1],
+                          dpos[k][2]-m.c[2]);
+      }
+      dMassTranslate (&m,-m.c[0],-m.c[1],-m.c[2]);
+    }
+
+    for (k=0; k < GPB; k++) {
+      if (obj[i].geom[k]) dGeomSetBody (obj[i].geom[k],obj[i].body);
+    }
+
+    dBodySetMass (obj[i].body,&m);
+  }
+
+  if (cmd == ' ') {
+    selected++;
+    if (selected >= num) selected = 0;
+    if (selected < 0) selected = 0;
+  }
+  else if (cmd == 'd' && selected >= 0 && selected < num) {
+    dBodyDisable (obj[selected].body);
+  }
+  else if (cmd == 'e' && selected >= 0 && selected < num) {
+    dBodyEnable (obj[selected].body);
+  }
+  else if (cmd == 'a') {
+    show_aabb ^= 1;
+  }
+  else if (cmd == 't') {
+    show_contacts ^= 1;
+  }
+  else if (cmd == 'r') {
+    random_pos ^= 1;
+  }
+  else if (cmd == 'o') {
+    draw_geom ^= 1;
+  }
+}
+
+
+// draw a geom
+
+void drawGeom (dGeomID g, const dReal *pos, const dReal *R, int show_aabb)
+{
+        if (!draw_geom){
+                return;
+        }
+
+  if (!g) return;
+  if (!pos) pos = dGeomGetPosition (g);
+  if (!R) R = dGeomGetRotation (g);
+
+  int type = dGeomGetClass (g);
+  if (type == dBoxClass) {
+    dVector3 sides;
+    dGeomBoxGetLengths (g,sides);
+    dsDrawBox (pos,R,sides);
+  }
+  else if (type == dSphereClass) {
+    dsDrawSphere (pos,R,dGeomSphereGetRadius (g));
+  }
+  else if (type == dCapsuleClass) {
+    dReal radius,length;
+    dGeomCapsuleGetParams (g,&radius,&length);
+    dsDrawCapsule (pos,R,length,radius);
+  }
+/*
+  // cylinder option not yet implemented
+  else if (type == dCylinderClass) {
+    dReal radius,length;
+    dGeomCylinderGetParams (g,&radius,&length);
+    dsDrawCylinder (pos,R,length,radius);
+  }
+*/
+  else if (type == dGeomTransformClass) {
+    dGeomID g2 = dGeomTransformGetGeom (g);
+    const dReal *pos2 = dGeomGetPosition (g2);
+    const dReal *R2 = dGeomGetRotation (g2);
+    dVector3 actual_pos;
+    dMatrix3 actual_R;
+    dMULTIPLY0_331 (actual_pos,R,pos2);
+    actual_pos[0] += pos[0];
+    actual_pos[1] += pos[1];
+    actual_pos[2] += pos[2];
+    dMULTIPLY0_333 (actual_R,R,R2);
+    drawGeom (g2,actual_pos,actual_R,0);
+  }
+
+  if (show_aabb) {
+    // draw the bounding box for this geom
+    dReal aabb[6];
+    dGeomGetAABB (g,aabb);
+    dVector3 bbpos;
+    for (int i=0; i<3; i++) bbpos[i] = 0.5*(aabb[i*2] + aabb[i*2+1]);
+    dVector3 bbsides;
+    for (int j=0; j<3; j++) bbsides[j] = aabb[j*2+1] - aabb[j*2];
+    dMatrix3 RI;
+    dRSetIdentity (RI);
+    dsSetColorAlpha (1,0,0,0.5);
+    dsDrawBox (bbpos,RI,bbsides);
+  }
+}
+
+
+// simulation loop
+
+static void simLoop (int pause)
+{
+  dsSetColor (0,0,2);
+  dSpaceCollide (space,0,&nearCallback);
+  //if (!pause) dWorldStep (world,0.05);
+  //if (!pause) dWorldStepFast (world,0.05, 1);
+
+  // remove all contact joints
+  dJointGroupEmpty (contactgroup);
+
+  dsSetColor (1,1,0);
+  dsSetTexture (DS_WOOD);
+  for (int i=0; i<num; i++) {
+    for (int j=0; j < GPB; j++) {
+      if (i==selected) {
+        dsSetColor (0,0.7,1);
+      }
+      else if (! dBodyIsEnabled (obj[i].body)) {
+        dsSetColor (1,0,0);
+      }
+      else {
+        dsSetColor (1,1,0);
+      }
+      drawGeom (obj[i].geom[j],0,0,show_aabb);
+    }
+  }
+}
+
+
+int main (int argc, char **argv)
+{
+  // setup pointers to drawstuff callback functions
+  dsFunctions fn;
+  fn.version = DS_VERSION;
+  fn.start = &start;
+  fn.step = &simLoop;
+  fn.command = &command;
+  fn.stop = 0;
+  fn.path_to_textures = "../../drawstuff/textures";
+  if(argc==2)
+    {
+        fn.path_to_textures = argv[1];
+    }
+
+  // create world
+  dInitODE();
+  world = dWorldCreate();
+
+
+  dVector3 Center = {0, 0, 0, 0};
+  dVector3 Extents = {WORLD_SIZE * 0.55, WORLD_SIZE * 0.55, WORLD_SIZE * 0.55, 0};
+
+  //space = dSimpleSpaceCreate(0);
+  //space = dHashSpaceCreate (0);
+  space = dQuadTreeSpaceCreate (0, Center, Extents, 6);
+  
+  contactgroup = dJointGroupCreate (0);
+  dWorldSetGravity (world,0,0,-0.5);
+  dWorldSetCFM (world,1e-5);
+  dCreatePlane (space,0,0,1,0);
+  memset (obj,0,sizeof(obj));
+
+  for (int i = 0; i < NUM; i++){
+        command('s');
+  }
+
+  // run simulation
+  dsSimulationLoop (argc,argv,352,288,&fn);
+
+  dJointGroupDestroy (contactgroup);
+  dSpaceDestroy (space);
+  dWorldDestroy (world);
+  dCloseODE();
+  return 0;
+}