Detect collision with terrain

I know there are some forums about this but I have other colliders:
Terrain(look in inspector):



and the object(Box trigger collider):


I tried this in a script attached to the object:

Code (CSharp):

1. void OnTriggerEnter(Collider other){
2.    if(other.GetComponent<Terrain>() != null){
3.       collide = true;
4.    }
5. }

It is not working.

i also tried this:

Code (CSharp):

1. void OnTriggerEnter(Collider other){
2.    if(other is TerrainCollider){
3.       collide = true;
4.    }
5. }

 

See the "Collision action matrix" at the bottom of this manual page.
https://docs.unity3d.com/Manual/CollidersOverview.html

A static trigger collider will not trigger another static trigger collider, which appears to be the case here from your screen shots. It also looks like you're using them in a way specifically not recommended. From the same manual page, emphasis mine:

 

But Why do you say that I have 2 triggers collider, because only the object has trigger. the terrain has a terrain collider and I think that the TerrainCollider isn't a trigger!

 

I think you should just remove the mesh collider on the terrain.
I'm pretty sure for a trigger to happen only one object needs to be set to a trigger, if both are triggers it's like they're invisible to each other, don't use triggers that much though -- so not sure..

@Joe-Censored - it's no longer the case since Unity 5 I believe, someone at the Unity team just refuses to update those docs (along with a few other really bad ones).
I think I saw @yant and a few others say so (not about somebody outright refusing to change the docs).

 

Thank you, but I tried to remove the mesh from terrain but I isn't detect the collision. Anyway, I found another way to do what I wanted without collision with the t1errain, but probably, in future, I will need the same thing for other projects, so I'm still searching for this.

(I forgot to mention that the moving of the object is an animation) I don't know if that is the reason because the collision isn't detected.

 

seems you are right, and that its impossible for a trigger to fire when an object touches or passed through a terrain, without adding something extra, besides the terrain collider on the terrain side, or in addition to the IsTrigger collider on the object side.
MikeyJY, how did you accomplish this, eventually?

 

I don't really remember sorry. I think I didn't use the trigger check at all.