2.5 KiB
NavMesh Overview
The NavMesh system is your go-to for pathfinding and AI movement in 3D environments. Imagine you're baking a map that your game characters can navigate on — that’s what the NavMesh is. You can tweak how characters move, handle obstacles, and even create custom paths.
Static Properties
| Property | Description |
|---|---|
AllAreas |
Think of this as selecting everywhere your AI can walk. |
avoidancePredictionTime |
How far in the future Unity should predict AI avoiding each other. |
onPreUpdate |
A callback you can hook into right before the NavMesh updates. |
pathfindingIterationsPerFrame |
Controls how much pathfinding Unity does each frame. More means better accuracy but slower frames. |
Key Static Methods (Chill Teacher Mode)
1. AddLink
This method is all about creating custom paths between two points on the NavMesh — perfect if you want shortcuts or special routes.
NavMesh.AddLink(new NavMeshLinkData()
{
startPosition = new Vector3(0, 0, 0),
endPosition = new Vector3(10, 0, 10),
width = 2.0f
});
- Use Case: You want to build a bridge between two points that aren't directly connected.
2. CalculatePath
Wanna know how your AI is gonna move from Point A to Point B? Use this to calculate that path ahead of time.
NavMeshPath path = new NavMeshPath();
NavMesh.CalculatePath(startPos, endPos, NavMesh.AllAreas, path);
- Cool Trick: You can check if the path is valid or not (
path.status), which helps avoid bad routes.
3. FindClosestEdge
Ever needed to know where the closest boundary is in your NavMesh? This one’s handy for that!
NavMeshHit hit;
if (NavMesh.FindClosestEdge(transform.position, out hit, NavMesh.AllAreas))
{
Debug.Log("Edge found at: " + hit.position);
}
- Why It’s Useful: It's like your AI has a radar for walls and limits. Use it to keep them in bounds.
4. Raycast
This is like drawing an invisible line to see if the AI can walk straight to a point.
NavMeshHit hit;
if (!NavMesh.Raycast(startPos, endPos, out hit, NavMesh.AllAreas))
{
Debug.Log("Line of sight is clear!");
}
- Pro Tip: Use it to test if obstacles are in the way, so you can reroute AI.
These examples should give you a good starting point to experiment and make your AI navigation smarter. Keep in mind, you’ll need to bake your NavMesh in the scene first!
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