RayTest works odd on slope of heights field

[Chaz]

Hey. I just making an character controller based on ray testing. Have a problem when character stays at an slope of a terrain.
Here is simple code of how to check is a character on the ground.

Code: Select all

@Override
    public void updateAction(CollisionWorld collisionWorld, float deltaTime) {
        this.deltaTime=deltaTime;
        world=collisionWorld;

        Step();
    }

private void Step()
    {
        CheckGround();

        if(!onGround)
        {
            Gravity();
        }
}

 private void CheckGround()
    {
        System.out.println();

        Vector3 from = new Vector3(GetCurrentPosition()); 
        Vector3 to = new Vector3(from);
        to.y-=(trueHalfHeight+rayLength+Math.abs(currentGravitySpeed.y));

        toWorld=new Vector3(to);

        ClosestRayResultCallback callback = new ClosestRayResultCallback(from, to);
        callback.collisionFilterGroup=MyCollisionFlags.RAY;
        callback.collisionFilterMask=(MyCollisionFlags.TERRAIN | MyCollisionFlags.STATIC_OBJ);
        world.rayTest(from, to, callback);

        if(callback.hasHit())
        {
            System.out.println("Has hit! " + " hit point: "+callback.hitPointWorld);
            lastNormal=new Vector3(callback.hitNormalWorld);
            Vector3 newPos = new Vector3(callback.hitPointWorld);
            newPos.y+=(trueHalfHeight);
            onGround=true;
            currentGravitySpeed.clr();

            SetPosition(newPos);
        }
        else
        {
            System.out.println("Has not hit =(!");
            onGround=false;
        }
        System.out.println("From: "+from+"  To: "+to+" length: "+new Vector3(from).sub(to).len());

        System.out.println();
    }

private void Gravity()
    {
        Vector3 tmp = new Vector3(GetCurrentPosition());
        tmp.add(currentGravitySpeed);
        currentGravitySpeed.add(gravity.scl(deltaTime));
        SetPosition(tmp);
    }

Code is pretty simple. I just casting a ray to the position under the character, and if it gives an hit - character stops.
On a flat surface or on a slope of cube it works perfectly, but on a slope of terrain it gives no hit sometimes.
Here a video. Blue line is the ray. So you can see that his length is enough to make a hit, but it does not.
https://youtu.be/tMJ98_rElgQ

[Chaz]

The problem was in my stupidity, ehehe!
As you now counstructor of heightmapterrain needs to concrete min and max height. I thought that it only used for terrain location but not only...