Ball go through the ground and keep falling down

Target Platforms Mobile
1

Hello everybody,

This is my first post, i just installed unity iphone on my brand new mac mni and i like it very much

Here’s my problem

i have a a ground model put into a scene and i added a rigidbody to the ground model without gravity.

i try to send a ball over it. i apply to the ball a transform 0,0,25. i also added a rigidbody, a certain mass and use gravity

when i throw the ball, it goes through the ground and keep falling. the y axis keep increase in the negative

am i doing something wrong or missed something? how can i make that the fall fall on the ground and roll on it?

any help much appreciated

2

Did you remember to add a collision component?

3

no, can you explain how to do that?
is it by script?

cheers

4

Select your object, then menu/component/physics and select an appropriate collider. You can do it with scripts too.

Check the manual for more details
http://unity3d.com/support/documentation/Manual/Physics.html

5

ok, i’ll do that, thanks very much!

6

shall i add a collider only to the ball or also to the ground model?

7

Both I think.

8

The plane should have a collider (instead of the default a box collider is generally better).

The ball should have a sphere collider and a rigidbody (assuming you want gravity, etc) to act on it.

9

hi all,

thanks for the help

i added a mesh collider to the ground model as it is made of several boxes. i dont have to add a collider to each boxes as they are under the ground model in the hierarchy, right?

i added a rigidbody and a sphere collider to the ball.

but the ball keep falling down

any idea?

10

i solved the problem

adding a mesh collider to the upper model didnt work

it seems that i have to add a collider each box composing the model, is that right?