Unity Editor Scene面板下绘制路径点

最新推荐文章于 2024-11-13 17:46:56 发布

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本文介绍了一个Unity自定义编辑器窗口的例子，该窗口能在场景视图中绘制一个由三点构成的三角形，并使用箭头指示方向。通过简单的代码展示了如何创建自定义编辑器窗口并实现场景GUI操作。

简单粗暴上代码。

using System.Collections;
using System.Collections.Generic;
using UnityEditor;
using UnityEngine;

public class SceneWindow : EditorWindow
{
    private Vector3[] points = new Vector3[3]
    {
        new Vector3(){x = 0,y =0,z = 0},
        new Vector3() {x = 2,y= 0,z=0},
        new Vector3(){x=2,y=0,z=1}
    };
    [MenuItem("Tools/SceneWindow")]
    static void Open()
    {
        CreateWindow<SceneWindow>();
    }
    public void OnEnable()
    {
        SceneView.duringSceneGui -= OnSceneGUI;
        SceneView.duringSceneGui += OnSceneGUI;
    }

    public void OnDestroy()
    {
        SceneView.duringSceneGui -= OnSceneGUI;
    }

    public void OnSceneGUI(SceneView view)
    {
        Handles.color = Color.blue;
        for (int i = 0; i < 3; i++)
        {
            Handles.Label(points[i],$"点{i}", new GUIStyle() { fontSize = 20 });
        }
        for (int i = 0; i < 2; i++)
        {
            Vector3 from = points[i];
            Vector3 to = points[i + 1];
            Handles.DrawLine(from, to);

            //绘制方向箭头
            Vector3 middle = (from + to) * 0.5f;

            Vector3 v0 = from - to;
            v0 *= 2 / v0.magnitude;
            Vector3 v1 = new Vector3(v0.x * 0.866f - v0.z * 0.5f, v0.y * 0.866f, v0.x * 0.5f + v0.z * 0.866f);
            Vector3 v2 = new Vector3(v0.x * 0.866f + v0.z * 0.5f, v0.y * 0.866f, v0.x * -0.5f + v0.z * 0.866f);
            Handles.DrawAAPolyLine(3, middle + v1, middle, middle + v2);
        }
    }
}