Question Terrain Collision Detection

I'm trying to have a character controller move from one point to another on a mostly flat terrain with the exception of a small bump in the terrain between its starting point and its destination. I'm also trying to get the character controller to detect the small bump as and when it moves with the following code, but for whatever reason it never sees the bump. Why is that?

Code (csharp):

1.  
2. //Move towards destination
3.         if (transform.position != destination)
4.         {
5.             //Set angle and magnitude of movement
6.             float angle = AngleBetween(transform.position, destination);
7.             float magnitude = Time.deltaTime * SPEED;
8.             transform.eulerAngles = Vector3.up * angle;
9.             if (magnitude > Vector3.Distance(transform.position, destination))
10.             {
11.                 magnitude = Vector3.Distance(transform.position, destination);
12.             }
13.  
14.             //Obstacle checking
15.             float radius = cc.radius * transform.localScale.x + cc.skinWidth;
16.             RaycastHit[] hits = Physics.CapsuleCastAll(CapsuleBottom(transform.position, radius), CapsuleTop(transform.position, radius), radius, AngleToVector(angle), magnitude);
17.             bool moveCheck = true;
18.  
19.             if (hits.Length > 1)
20.             {
21.                 print(true);
22.             }
23.  
24.             //Movement block
25.             if (!moveCheck)
26.             {
27.                 print("Insurmountable terrain detected");
28.             }
29.             else
30.             {
31.                 if (magnitude == Vector3.Distance(transform.position, destination))
32.                 {
33.                     transform.position = destination;
34.                 }
35.                 else
36.                 {
37.                     cc.Move(AngleToVector(angle) * magnitude);
38.                 }
39.             }
40.         }

 

Do you ever set moveCheck to false above? I don't see it. I would expect it somewhere around line 21 inside that if clause.

 

Not necessary at this point. What matters is that the if clause is triggered AT ALL and it's not. That's the problem.

 

Is CapsuleBottom immediately against the terrain? If so, a non-zero-sized capsule will already be IN the terrain when you cast so it won't hit the terrain.

Generally speaking you gotta be outside of and cast into a collider to have a chance of it hitting.

 

Which is why the capsule cast being tested is in the direction the character is moving and as far as the character should move that frame. The thought process was suppose to be that, as long as the vector of the capsule cast has no y component (ensured by the AngleToVector method) that it should snag itself on terrain if it's above where the character is at present.

 

I guess that depends on what is inside CapsuleBottom, CapsuleTop and AngleToVector!

Try hard numbers: make some invisible gameobjects you can move around in the scene, use them to make a capsule cast that you know is 100% above all the terrain, casting forward at the bump, see if it hits.

Otherwise we can do this all day long. You could be hitting yourself for all we know, or starting inside yourself so it ignores everything else. Isolate, isolate, isolate.

 

That's exactly what this code is doing and it's not finding the terrain.