Hi,

Do you want to achieve
A) the character stands upright, gets hit and falls to the floor, or
B) the character stands upright, gets hit, reacts and the gets back to upright?

Achieving B) is possible but a lot more difficult. Let us know if you want to do B. But hopefully you want to achieve A ;-)

For A):

Start with a Ragdoll with disabled joints, limits and motors:

_ragdoll.Pose = _pose;
_ragdoll.UpdateBodiesFromSkeleton(_skeletonPose);
 _ragdoll.DisableJoints();
_ragdoll.DisableLimits();
_ragdoll.DisableMotors();

and in each frame call:

_ragdoll.UpdateBodiesFromSkeleton(_skeletonPose);

to move the bodies to upright or animated skeleton position.

Then once you have detetected a hit (similar to the CollisionDetectionOnlyRagdollSample), switch to the passive ragdoll:

_ragdoll.EnableJoints();
_ragdoll.EnableLimits();
foreach (RagdollMotor motor in _ragdoll.Motors)
{
  if (motor != null)
  {
    motor.Mode = RagdollMotorMode.Constraint;
    motor.ConstraintDamping = 5;
    motor.ConstraintSpring = 0;
  }
}
_ragdoll.EnableMotors(); 

and in each frame call

_ragdoll.UpdateSkeletonFromBodies(_skeletonPose);

That means: First the skeleton controls the bodies. After the hit the bodies control the skeleton.

I was looking more for Option B...

Best of example would be a boxing game, in which the boxer reacts to the force of each punch...

--- > apply force of impact, react (partial rag doll), once reaction complete blend back to fighting stance.

UNLESS  the force of impact is greater than the boxer's threshold which would knock the boxer down into full ragdoll.

Would that be hard to achieve?

---

Nelxon! ::.. Artist, Animator, Programmer, Game Developer..::

Thanks, Great explanation.

I have been using  a similar approach like the one explain above, so I guess I'm on the right track.

---

Nelxon! ::.. Artist, Animator, Programmer, Game Developer..::

I am not sure if I understood your question. I assume you want to have constraints (rotation limits) for the IK solver samples?

The physics constraints (as used in the passive ragdoll sample) are not yet integrated in the IK solvers.
The LookAtIKSolver and the TwoJointIKSolver have properties to define rotation limits.
The ClosedFormIKSolver does not support rotation limits.
The CcdIKSolver and the JacobianTransposeIKSolver have a property LimitBoneTransforms, where you can specify a delegate method that applies rotation limits. In this delegate method you have to manually check for invalid rotation angles and correct them.

If you want to avoid unrealistic IK solver results, I recommend to keep the IK target within a certain range where the IK solver produces good results.

I hope this is the information you are looking for ;-)

Sorry, I am still not sure what you are asking for.

Do you want to add constraints to an IK solver? Do you want to add an IK solver to the passive ragdoll sample? Do you want the passive ragdoll arm to reach for something?