koobas.hobune.stream
how to change physics material of a colider in runtime
hello I was wondering if I can change the physics material of an object's colider. for example, changing it from metal to bouncy. is it even possible?
You can pre-create the desired material in the editor Unity or use available in "Assets/Standard Assets/Physic Materials". Then place it into "Assets/Resources/PhysicMaterials". And for runtime change:
gameObject.collider.material = (PhysicMaterial)Resources.Load("PhysicMaterials/Wood");
Use the following code to assign when you import resources:
public void OnPostprocessModel(GameObject importedObject)
{
CapsuleCollider capColl = importedObject.AddComponent<CapsuleCollider>();
capColl.material = (PhysicMaterial)Resources.Load("PhysicMaterials/Wood");
}
This doesn't seem to work for me. I keep getting an error message saying the editor is expecting a semicolon on line 78, which ends up being in between the E and the S in the word Resources.
Anyone have any ideas?
Yes, you can change collider.material, by either assigning a PhysicMaterial:
var myMaterial : PhysicMaterial;
function Start () { collider.material = myMaterial; }
or changing individual properties (collider.material.bouncyness, etc.).
In c#
this.collider.material=new PhysicMaterial("Wood");
But don't forgot we need to refresh rigidbody for applying changes.
before change: rigidbody.isKinematic = true ; rigidbody.Sleep();
after change: rigidbody.isKinematic = false ; rigidbody.Wakeup();
Yes, that is possible. You can set the active PhysicMaterial by setting collider.material. To make sure that the materials are included in the scene, you can create an array of PhysicMaterials which you set at design time
Make a public array of PhysicMaterials in the class
public PhysicMaterial materials[]
If you fill this list from the inspector in the Unity editor, you can then assign one of the materials at runtime:
collider.material = materials[i]
Be careful if you decide to change the properties of a PhysicMaterial object at runtime instead of/without changing the sharedMaterial (or material) property of the colliders using it. In some cases, the physics engine will continue to use the old properties of a PhysicMaterial object. See this forum post of mine for more information.
