how to make physics for small ball

Unity Engine
1

Ball, plane A, plane B

plane A and plane B is flat but ball collision

Rolling the ball on the same height two planes … when it pass other objects, it comes out to collision though it is flat

Samples will be aware of the shot button pressed Go roll will find that it does OnCollision

Two terrain is flat. But the ball to collision. Is this a problem?
The terrain mesh is made of two objects with different color appears on the screen

why do collision? what 's problem?

please help me~

preview image
[1]: http://al3.co.kr/albatross3_patch/albatross3/jameslee/collisionerror.jpg

sample source
[2]: http://al3.co.kr/albatross3_patch/albatross3/jameslee/NewUnityProject15.zip

webplayer
[3]: http://unity.al3.co.kr/JamesLee/test/webplayer.html

2

Did you give the ball a Sphere Collider?

3

of course the collision need sphear collider

4

It’s somewhat difficult to parse your question, I’m guessing due to a language barrier.

Phrases such as “is flat but ball collision” “comes out to crash” apparently got lost in translation.

The only wild guess I can make, is a problem that you see often with physics and ‘small balls.’ You need to have your ‘small ball’ be at least one unity unit in size, then scale the rest of your scene around that. Anything smaller than a 1 unit sphere, the physics engine tends to miss collisions. It’s just not designed for ‘small balls’ the size of a proton.

Perhaps you have a friend or co-worker with better English skills that can help you explain your issue better?

5

“is flat but ball collision” or “comes out to crash” is the same meaning.

plane A and plane B is flat.
plane A and plane B is same height.
The ball passes over the plane.
The ball must be passed.but collision occurs.


http://unity.al3.co.kr/jameslee/test/rec.avi