Disable/stop solver?

[lacasrac]

Hello,

I have a boxcollider, when the player trigger it I want to "move" the rope
But when the player onTriggerExit the rope will be freeze.

How can I do that with attachments? How can I freeze or unfreeze it?

[josemendez]

How can I do that with attachments? How can I freeze or unfreeze it?

Hi there,

I'm not sure what you mean by freezing/unfreezing an attachment. Attachments simply constrain the relative position of a rope and a target transform/rigidbody, you could freeze either the rope or the transform/rigidbody.

Could you elaborate a bit more?

kind regards

[lacasrac]

Hi there,

I'm not sure what you mean by freezing/unfreezing an attachment. Attachments simply constrain the relative position of a rope and a target transform/rigidbody, you could freeze either the rope or the transform/rigidbody.

Could you elaborate a bit more?

kind regards

Code:

        public void Disable()
        {
            //solver.enabled = false;
            for (var i = 0; i < _solver.velocities.count; i++)
            {
                _solver.velocities[i] = Vector4.zero;
                _solver.angularVelocities[i] = Vector4.zero;
            }
            positions.Last().transform.GetComponent<Rigidbody>().isKinematic = true;
        }

        public void Enable()
        {
            //solver.enabled = true;
            positions.Last().transform.GetComponent<Rigidbody>().isKinematic = false;
        }

So I have this code on my rope. I attached a Cube with 4 ropes, in the corners.
When I disable it, I want to the rope rest in position. (positions.Last is the rigidbody attached to the 4 fixedjoint)

1, So I disable all my ropes with this code
2, After it I just set back the positions/rotations to default to all my fixedjoints
3, Enable the rope again

Result -> ropes jumping back

I just want to stay there

[josemendez]

Code:

        public void Disable()
        {
            //solver.enabled = false;
            for (var i = 0; i < _solver.velocities.count; i++)
            {
                _solver.velocities[i] = Vector4.zero;
                _solver.angularVelocities[i] = Vector4.zero;
            }
            positions.Last().transform.GetComponent<Rigidbody>().isKinematic = true;
        }

        public void Enable()
        {
            //solver.enabled = true;
            positions.Last().transform.GetComponent<Rigidbody>().isKinematic = false;
        }

So I have this code on my rope. I attached a Cube with 4 ropes, in the corners.
When I disable it, I want to the rope rest in position. (positions.Last is the rigidbody attached to the 4 fixedjoint)

1, So I disable all my ropes with this code
2, After it I just set back the positions/rotations to default to all my fixedjoints
3, Enable the rope again

Result -> ropes jumping back

I just want to stay there

Hi,

This works fine for me, no rope jumping. If you are modifying any rigidbody/joint properties while the solver is disabled (you mention resetting position and rotation fixed joints) in a way that violates solver constraints, ropes will of course jump back to the closest configuration that doesn't violate any constraints (collisions, attachments, distance, bending, etc) once you re-enable the solver.

The only way to prevent this is by resetting particle positions together with joints yourself, in order to meet all constraints: make sure attached particles are at the position they should be attached to, make sure they're not stretched or over-bent, etc.

kind regards,

[lacasrac]

Hi,

This works fine for me, no rope jumping. If you are modifying any rigidbody/joint properties while the solver is disabled (you mention resetting position and rotation fixed joints) in a way that violates solver constraints, ropes will of course jump back to the closest configuration that doesn't violate any constraints (collisions, attachments, distance, bending, etc) once you re-enable the solver.

The only way to prevent this is by resetting particle positions together with joints yourself, in order to meet all constraints: make sure attached particles are at the position they should be attached to, make sure they're not stretched or over-bent, etc.

kind regards,

I just sent you an example, to your email: support@virtualmethodstudio.com
Can you please check it?