The ObjectInstance Class

 float Radius(void) const { return ParentObject->radius; };
 float BoxLeft(void) const { return ParentObject->minY; };
 float BoxRight(void) const { return ParentObject->maxY; };
 float BoxTop(void) const { return ParentObject->minZ; };
 float BoxBottom(void) const { return ParentObject->maxZ; };
 float BoxFront(void) const { return ParentObject->maxX; };
 float BoxBack(void) const { return ParentObject->minX; };

 void SetSwitch( int id, UInt32 value ) { ShiAssert(id<ParentObject->nSwitches); SwitchValues[id] = value; };
 void SetDOFrotation( int id, float r ) { ShiAssert(id<ParentObject->nDOFs); DOFValues[id].rotation = r; };
 void SetDOFxlation( int id, float x ) { ShiAssert(id<ParentObject->nDOFs); DOFValues[id].translation = x; };
 void SetSlotChild( int id, ObjectInstance *o ) { ShiAssert(id<ParentObject->nSlots); SlotChildren[id] = o; };
 void SetTextureSet( int id )
 {
  // edg: sanity check texture setting
  if (id < ParentObject->nTextureSets)
   TextureSet = id;
 };
 void SetDynamicVertex( int id, float dx, float dy, float dz );
 void GetDynamicVertex( int id, float *dx, float *dy, float *dz );

  public:
 UInt32   *SwitchValues;
 DOFvalue  *DOFValues;
 ObjectInstance **SlotChildren;
 Ppoint   *DynamicCoords;
 int    TextureSet;
 int    id;

 ObjectParent *ParentObject;