NavMeshAgent.SetDestination Y axis problem

user_13841256 0
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Im trying to create simple movement AI for GameObjects.

Each GameObject has NavMeshAgent

Vector3 destination = new Vector3(Random.Range(-walkArea, walkArea), 0, Random.Range(-walkArea, walkArea));
navAgent.SetDestination(destination);

That's what im trying to do. But my baked ground not flat, there could be Y axis up to 30-40.

So if there mountains around GameObject he just gets stuck and can't climb over.

What can i do about it? If i just navAgent.Move(destination), everything works fine. GameObject teleports on X-Z position without worrying about Y axis.

How i can do same thing but with SetDestination?

unity3d
2 Answers

I found solution.

In main GameObject i created empty gameobject with NavMeshAgent.

Vector3 destination = new Vector3(Random.Range(-walkArea, walkArea), 0, Random.Range(-walkArea, walkArea));
navDestinationObject.Move(destination);
navAgent.destination = navDestinationObject.transform.position;

navDestinationObject gets right Y axis on .Move, then we just move main GameObject to navDestinationObject position.

But i think there must be better solution...

user_138412560

Get the ground y by casting a Ray where groundLayerMask is the LayerMask of your ground to prevent misbehave.

public void WalkTo(Vector3 position)
{
    Physics.Raycast(position + Vector3.up * 64, Vector3.down, out RaycastHit hit, 128, groundLayerMask);
    position.y = hit.y;
    navAgent.SetDestination(position);
}

So we cast a Ray from 64 units above the position to find the ground y and then set it manually. (The RaycastHit is struct so if there is no hit, y will be 0.)

user_57860390
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