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Question by Hellwalker · Apr 30, 2010 at 07:12 PM · ballrotatearound

rotating ball with rigidbody attached

hello, I have code like this

if (Input.GetKey ("w")) { rigidbody.AddForce (0,0,moveSpeed); }

if (Input.GetKey ("a")) {

     transform.Rotate (0, 0, 20000 * Time.deltaTime);

}

if (Input.GetKey ("s")) { rigidbody.AddForce (0,0,-moveSpeed); }

Basically I have a ball with rigid body and I move it by adding force, now I want to rotate it when I click A and D. so it changes direction, I tried several rotations, including local rotate of transform, normal rotate and adding torque but ball spins in place, it kinda does not change direction. O_O its like unruly pet ball

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Answer by Gustavo Quiroz 1 · Sep 20, 2010 at 06:32 PM

if (Input.GetKey ("w")) { rigidbody.AddForce (0,0,moveSpeed); }

if (Input.GetKey ("a")) {

rigidbody.AddForce(moveSpeed, 0, 0);

}

if (Input.GetKey ("d")) {

rigidbody.AddForce(-moveSpeed, 0, 0);

}

if (Input.GetKey ("s")) { rigidbody.AddForce (0,0,-moveSpeed); }

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Answer by swhite · Sep 20, 2010 at 05:17 PM

Try applying the force using AddRelativeForce

if (Input.GetKey ("w")) {
rigidbody.AddRelativeForce(0,0,moveSpeed); 
}

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Answer by Daniel 8 · Jun 27, 2010 at 09:44 AM

can you please just tell me a script that might work? You would be awesome and i would never get over it!

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Answer by jester · Apr 30, 2010 at 10:36 PM

i think the problem is that you're adding a force but always in the same direction (along positive z axis). you don't want to rotate the ball but rotate the force. try calculating a new force vector that is rotated in the direction you want to move and then add that force to the ball.

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