Rigidbody (Player) goes through wall

Question

I have a game that player is the cube. That cube moves around like 2D side scrolling game. The cube has a rigidbody and box collider to it. When the player moves toward the wall, and touch the wall, a bit later, the player suddenly goes through the wall. I have searched this site for the solution that have written before, but what I found doesn't match my condition.

Here is my control script (shortcut) :

 transform.Translate (Vector3(Input.GetAxis ("Horizontal") * Time.deltaTime *speed,0,0),Space.World);

Here is the link to the game if you want to see the problem more clearly.

http://www.kongregate.com/games/vitou01/cube-land

Thanks in advance.

Edit :

my wall has box collider.

Answer 1

Best Answer

Answer by Oninji · Jan 10, 2012 at 05:42 PM

Transform does not call the Physic components of your rigidbody, thus it ignores all physic. Colliders are physic component, for your code to include them you must move your objects using it's rigidbody physics.

http://unity3d.com/support/documentation/ScriptReference/Rigidbody.html

ie: When I do an AI that need to have perfectly controlled movement, I manage the Velocity of the rigidbody through code.

Depending on what you want to do and your ease with physics, you may want to use the Character Controller, it's essentially a rigidbody with simplified functions to be controlled as a Character.

http://unity3d.com/support/documentation/ScriptReference/30_search.html?q=character+controller

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henry96 · Jan 11, 2012 at 05:41 AM 0

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I have tried changing the velocity of the rigidbody before. It works great. No more going through wall. However, I have trouble with control. While the cube is falling, and the button is pressed, the cube hardly want to fall. It keeps going left/right.

Here is my code I used before :

rigidbody.velocity = Vector3 (Input.GetAxis ("Horizontal") Time.deltaTime speed , 0 , 0);

Do you know how to fix this?

Oninji · Jan 11, 2012 at 06:01 AM 1

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It's simple, the way you currently control it. You set Y and Z velocity at 0 constantly. Z being the vertical orientation, it won't fall.

Do something like rigidbody.velocity.x = Input.GetAxis("Horizontal")*Time.deltaTime*speed;

But as I stated before, if you're not entirely sure how a rigidbody works, use a CharacterController, it's the same but a bit simplified. Unless you need extremely specific controls that are unachievable with it in some RARE cases.

henry96 · Jan 11, 2012 at 06:15 AM 0

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Horray!!!!!! Now the problem is solved! Thanks for your help! :D

Answer 2

Answer by swisscoder · Jan 10, 2012 at 05:14 PM

If you would add the CharacterController component to the cube, you could call it's Move method. Maybe works better. http://unity3d.com/support/documentation/ScriptReference/CharacterController.Move.html

I see your camera isn't really smooth too. (Maybe you could use the methods Slerp/Lerp of Vector3, to make things smoother.)

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henry96 · Jan 11, 2012 at 05:51 AM 0

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I try the character controller. There is no more going through wall, which is a good thing. However, my cube lost its realistic. There is no more rotating.

Rigidbody (Player) goes through wall

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