Physic ragdoll folowing bone animation.

[PJani]

Is there any possible way to make ragdoll bones follow bone positions. So in case of some outside force ragdoll bones tries to resistance that force until outside force is big enough to move it from there. When outside force lowers, ragdoll goes back to animation pose...

[Julio Jerez]

yes there is a way.
If you wait until I get to the Rag doll demo in Ogrenewt so that you use a proper Ogre style joint, that uses the cotusm joint in Newton.
I should have it in a usable by this friday at most.

[PJani]

No problem, I will wait till then.

anyway for what and how is KinematicController used?

i worte this code for OgreNewt...and put it in
OgreNewt_BasicJoints.h

Code: Select all

class _OgreNewtExport KinematicController : public Joint
{
public:
   KinematicController::KinematicController(OgreNewt::Body* bdy0, const Ogre::Vector3& pos);
   KinematicController::~KinematicController();

   void KinematicController::setPickMode(int mode);
   void KinematicController::setMaxLinearFriction(float accel);
   void KinematicController::setMaxAngularFriction(float alpha);
   void KinematicController::setTargetRotation(const Ogre::Quaternion& rot);
   void KinematicController::setTargetPosit(const Ogre::Vector3& pos);

};


OgreNewt_BasicJoints.cpp

Code: Select all

             KinematicController::KinematicController(OgreNewt::Body* bdy0, const Ogre::Vector3& pos)
      :Joint()
   {
      //OgreNewt::Body::
      CustomKinematicController* ckc = new CustomKinematicController(bdy0->getNewtonBody(),dVector(pos.x,pos.y,pos.z));
      
      SetSupportJoint(ckc);
   }
   
   KinematicController::~KinematicController(){}

   void KinematicController::setPickMode(int mode)
   {
      CustomKinematicController* ckc = (CustomKinematicController*)m_joint;
      ckc->SetPickMode(mode);
   }

   void KinematicController::setMaxLinearFriction(float accel)
   {
      CustomKinematicController* ckc = (CustomKinematicController*)m_joint;
      ckc->SetMaxLinearFriction(accel);
   }

   void KinematicController::setMaxAngularFriction(float alpha)
   {
      CustomKinematicController* ckc = (CustomKinematicController*)m_joint;
      ckc->SetMaxAngularFriction(alpha);
   }

   void KinematicController::setTargetRotation(const Ogre::Quaternion& rot)
   {
      CustomKinematicController* ckc = (CustomKinematicController*)m_joint;
      ckc->SetTargetRotation(dQuaternion(rot.x,rot.y,rot.z,rot.w));
   }

   void KinematicController::setTargetPosit(const Ogre::Vector3& pos)
   {
      CustomKinematicController* ckc = (CustomKinematicController*)m_joint;
      ckc->SetTargetRotation(dVector(pos.x,pos.y,pos.z));
   }


but it seems like there is no effect on the body...

[Julio Jerez]

The KinematicController is a special joint for controlling single object by setting a matrix.
it is good for stuff tha can be scripetd in a game, like doors that open and close when you push a bottom.
elevators that go op and own, picking objects, making and object follow a path etc.

[PJani]

what actually setTargetPosit does becouse i don't see any effect.

Code: Select all

   
//Dont look at this is just some internal creation calls of my game engine.
      SceneGeometryManager::getSingleton().CreateMesh("player_2",&tmplt,pos+Ogre::Vector3(0,0,5),Ogre::Quaternion::IDENTITY,Ogre::Vector3(1,1,1));

      PhysicObject* po2 = ObjectManager::getSingleton().createBody("player_2",false,Ogre::Vector3::ZERO,2400,false);
//////////////////////////////////
// Mass of object is 2400kg and gravitation accel is 9.8m/s^2

      kc = new OgreNewt::KinematicController(po2->getOgreNewtBody(),pos+Ogre::Vector3(0,1,5));
      kc->setMaxLinearFriction(200);
      kc->setMaxAngularFriction(800);

      kc->setTargetRotation(Ogre::Quaternion::IDENTITY);
      kc->setTargetPosit(Ogre::Vector3(0,10,0));
      //kc->setPickMode(1);


[Julio Jerez]

// Mass of object is 2400kg and gravitation accel is 9.8m/s^2

kc = new OgreNewt::KinematicController(po2->getOgreNewtBody(),pos+Ogre::Vector3(0,1,5));
kc->setMaxLinearFriction(200);
kc->setMaxAngularFriction(800);

if the body is 2400 kg then then it will not move if the friction is so low, make friction make teh frition a factor of the body weight

kc->setMaxLinearFriction(mass * gravity * 4.0);
kc->setMaxAngularFriction(5 * (mass * gravity * 4.0));