Hinge Joint 2D change motor speed

Unity Engine
1

Hello everyone,

I’m working on Unity 2d project. and using hinge joint 2d to make animation for character.

Here is my code to make animation called “kick”.

public void Jump()
{
//Debug.Log (“Jump”);
if (grounded)
thisRigidbody.AddForce (jumpHeight * m_ThisTransform.up);

//hingeJoint2D.useMotor = false;
//hingeJoint2D = rightLeg.GetComponent ();

JointMotor2D motor = hingeJoint2D.motor;
if (team == Team.Left)
motor.motorSpeed = -motorSpeed;
else
motor.motorSpeed = motorSpeed;

hingeJoint2D.useMotor = true;
hingeJoint2D.motor = motor;

if (grounded)
grounded = false;

Invoke (“ResetLeg”, 0.2f);
}

void ResetLeg()
{
//hingeJoint2D = rightLeg.GetComponent ();
JointMotor2D motor = hingeJoint2D.motor;
if (team == Team.Left)
motor.motorSpeed = motorSpeed;
else
motor.motorSpeed = -motorSpeed;

hingeJoint2D.motor = motor;
//Invoke (“TurnOffMotor”, 0.1f);
}

Method working fine on first using. But when call “Jump” second, motor speed of JointMotor2D doest change.

Please suggest me some solution to fix this issue.

Thanks

2

Sorry this issue fixed by my selft :smile:

3

Hi, how did you get the motor speed to change?
I can’t find how. Thanks.

4

Ah, I found an answer on another thread! Gee, it’s weird and couldn’t find official documentation for it.

1 Like
5

everyone finds the answer and doesn’t post it here, nice!!

6 Likes
6

here we go, the solution:

JointMotor2D motor = hingeJoint2D.motor;
motor.motorSpeed = 400;
hingeJoint2D.motor = motor;

7 Likes
7

Thank you so much, this fixed my problem! None of the other forums seem to have this answer!

8

@Hasasan-Kanso It shows 2 errors saying:

  1. the name ‘hingeJoint2D’ does not exist in the current context
  2. the name ‘hingeJoint2D’ does not exist in the current context
    Help pls.
9

You have to define hingeJoint2D
above start put

HingeJoint2D hingeJoint2D;

and in start

hingeJoint2D = gameObject.GetComponent();