30 lines
1.4 KiB
Markdown
30 lines
1.4 KiB
Markdown
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# Moving an Agent to a Position Clicked by the Mouse
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This script lets you choose the destination point on the [**NavMesh**][1] by clicking the mouse on the object’s surface. The position of the click is determined by a _raycast_, rather like pointing a laser beam at the object to see where it hits (see the page [Rays from the Camera](https://docs.unity3d.com/Manual/CameraRays.html) for a full description of this technique). Since the [GetComponent](https://docs.unity3d.com/ScriptReference/GameObject.GetComponent.html) function is fairly slow to execute, the script stores its result in a variable during the _Start_ function rather than call it repeatedly in _Update_.
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```
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// MoveToClickPoint.cs
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using UnityEngine;
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using UnityEngine.AI;
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public class MoveToClickPoint : MonoBehaviour {
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NavMeshAgent agent;
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void Start() {
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agent = GetComponent<NavMeshAgent>();
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}
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void Update() {
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if (Input.GetMouseButtonDown(0)) {
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RaycastHit hit;
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if (Physics.Raycast(Camera.main.ScreenPointToRay(Input.mousePosition), out hit, 100)) {
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agent.destination = hit.point;
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}
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}
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}
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}
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```
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[1]: ./Glossary.md "A mesh that Unity generates to approximate the walkable areas and obstacles in your environment for path finding and AI-controlled navigation."
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