Simple rigidbody.AddForce only applying once each time key is pressed

Question

Hello there.

I am making a very simple script that moves a character left when pushed left, and right when pushed right. The script below works fine, except that it only moves the character on the first frame that it is pushed. I want it to continue moving that direction the entire duration of the key being held down.

The following code is in the Update function.

 if (Input.GetKeyDown (KeyCode.LeftArrow)){
     rigidbody.AddForce (Vector3.right * 100);
 }
 if (Input.GetKeyDown (KeyCode.RightArrow)){
     rigidbody.AddForce (-Vector3.right * 100);
 }

Thank you in advance.

Answer 1

Best Answer

Answer by Peter G · Oct 23, 2011 at 11:01 PM

You need to remove the "Down" from the GetKey.

 if (Input.GetKey (KeyCode.LeftArrow)){
     rigidbody.AddForce (Vector3.right * 100);
 }
 if (Input.GetKey (KeyCode.RightArrow)){
     rigidbody.AddForce (-Vector3.right * 100);
 }

GetKeyDown() only returns true on the first frame that a key is pressed, and GetKey() returns true every frame that the key is held down for.

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Simple rigidbody.AddForce only applying once each time key is pressed

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