collider not working when apply "addForce" high enough

Questions & Answers
1

first time to ask question :), if this question had been answered please point me to the right one.

so, i have a sphere act like ball / or imagine pool / billiard game. i have plane with mesh collider and cube with mesh collider and i put wall material physic (when i remove it, doesn't solve the problem)., so the ball cant go off the plane.

when i addForce the ball the ball will bounce the cube collider. but when i addForce high enough, the ball will bounce off the cube, go through it, its like the cube collider doesn't working. sometimes it bounce 1-3 times then it bounced out.

i have ball physic apply on sphere also.

here my code to add force the ball :

rigidbody.AddForce(forceX*100*Time.deltaTime,0,forceZ*100*Time.deltaTime);

its Top View camera so i dont need y axis.

when forceX = 50 and forceZ = 50. the problem occur. i wondering why the ball can go through collider because i add force high enough to it.

please kindly giv direction. thanks

2

This is commonly known as the 'bullet through paper' effect.

In a single update, the ball is traveling far enough that it is on the other side of the collision.

UnifyCommunity has a 'DontGoThroughThings' script that "uses raycasting to avoid the physics engine letting fast-moving objects go through other objects (particularly meshes)."

Hope this helps.

3

You can also try to change setting of Collision Detection in Rigidbody. I never use this before but it's a new attribute in Unity3. So, I think it should work too.

http://unity3d.com/support/documentation/Components/class-Rigidbody.html

Collision Detection Used to prevent fast moving objects from passing through other objects without detecting collisions.

Discrete - Used for normal collisions (This is the default value).

Continuous - Used for objects which the Continuous Dynamic detection needs to collide with.(This has a big impact on physics performance, leave it set to Discrete, if you don't have issues with collisions of fast objects).

Continuous Dynamic - Used for fast moving objects.

If I understand correctly, you need to set Continuous to your cube and Continuous Dynamic to your ball. Hope this help.