How to control the angle of a joint using a variable

Question

I want to use a variable to control the angle between two connected objects in unity, but I'm not sure what syntax to use for scripting the joint.

So I have a variable between 0 and 255, and I want the angle of a joint to match that number. How can I script the transform?

P.S. I'm pretty new to unity, and I'm using C# because I'm getting the angle data from a sensor attached to my computer.

Answer 1

Answer by MikeNewall · Apr 26, 2014 at 09:01 PM

Attach a script to the root joint and set its rotation by multiplying a vector by the input value. For example t$$anonymous$$s would rotate around the X axis the number of degrees specified by the variable:

 transform.rotation = Quaternion.Euler(Vector3.right * inputVariable);

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Owen-Reynolds · Apr 26, 2014 at 09:46 PM 0

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Quaternion.Euler( inputVariable, 0, 0); is the same thing, and I find it easier to read.

MikeNewall · Apr 27, 2014 at 12:35 AM 0

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I'm used to thinking in vectors :p But yeah that is easier to read. I suppose the benefit of using a vector like that is you can change the rotation axis on the fly.

Answer 2

Answer by Marcopolo1613 · Apr 30, 2014 at 03:56 AM

Thank you all for your help, I was able to do what I wanted with a Hinge Joint, and t$$anonymous$$s code:

 JointSpring spr = $$anonymous$$ngeJoint.spring;
 
 spr.targetPosition = myInputData; // myInputData is the input from my sensor
 
 $$anonymous$$ngeJoint.spring = spr;

T$$anonymous$$s makes the joint move toward the angle value I am receiving from my sensor.

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off99555 · Oct 11, 2018 at 03:29 AM 0

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How do you stop the joint from bouncing back and forth when it reaches the angle you specify? I want to set the angle and prevent it from moving anymore.

How to control the angle of a joint using a variable

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