EditorToolAttribute

描述

Registers an EditorTool as either a Global tool or a Component tool for a specific target type.

A Global tool works on any selection. A Global tool is also always available from the top toolbar. A Component tool, like a CustomEditor, is only available for selections that match a target type.

using System;
using System.Collections.Generic;
using System.Linq;
using UnityEngine;
using UnityEditor;
using UnityEditor.EditorTools;
using UnityEngine.Rendering;

// By passing `typeof(MeshFilter)` as the second argument, we register VertexTool as a CustomEditor tool to be presented
// when the current selection contains a MeshFilter component.
[EditorTool("Show Vertices", typeof(MeshFilter))]
class VertexTool : EditorTool, IDrawSelectedHandles
{
    struct TransformAndPositions
    {
        public Transform transform;
        public Vector3[] positions;
    }

    IEnumerable<TransformAndPositions> m_Vertices;
    GUIContent m_ToolbarIcon;

    public override GUIContent toolbarIcon
    {
        get
        {
            if (m_ToolbarIcon == null)
                m_ToolbarIcon = new GUIContent(
                    AssetDatabase.LoadAssetAtPath<Texture2D>("Assets/Examples/Icons/VertexTool.png"),
                    "Vertex Visualization Tool");
            return m_ToolbarIcon;
        }
    }

    void OnEnable()
    {
        m_Vertices = targets.Select(x =>
        {
            return new TransformAndPositions()
            {
                transform = ((MeshFilter)x).transform,
                positions = ((MeshFilter)x).sharedMesh.vertices
            };
        }).ToArray();
    }

    public override void OnToolGUI(EditorWindow window)
    {
        foreach (var entry in m_Vertices)
        {
            var matrix = entry.transform.localToWorldMatrix;
            Drawing.DrawHandleCaps(matrix, entry.positions, Color.cyan * .3f, .05f, CompareFunction.Greater);
            Drawing.DrawHandleCaps(matrix, entry.positions, Color.cyan, .05f, CompareFunction.LessEqual);
        }
    }

    public void OnDrawHandles()
    {
        if(!ToolManager.IsActiveTool(this))
            return;

        foreach (var entry in m_Vertices)
        {
            var matrix = entry.transform.localToWorldMatrix;
            Drawing.DrawHandleCaps(matrix, entry.positions, Color.cyan * .3f, .03f, CompareFunction.Greater);
            Drawing.DrawHandleCaps(matrix, entry.positions, Color.cyan, .03f, CompareFunction.LessEqual);
        }
    }
}

You can also use tool variants to group similar tools into a single button in the Tools overlay. Refer to ToolAttribute.variantGroup.

using System;
using UnityEditor;
using UnityEditor.EditorTools;
using UnityEngine;

namespace GlobalToolVariants
{
    // Define 3 tools that should be shown as a single button in the Tools Overlay.
    struct ShapeVariantGroup {}

    [EditorTool("Line (Custom Global)", variantGroup = typeof(ShapeVariantGroup), variantPriority = 2)]
    [Icon("Assets/Examples/Icons/Variant-Line.png")]
    class Line : EditorTool {}

    [EditorTool("Circle (Custom Global)", variantGroup = typeof(ShapeVariantGroup), variantPriority = 1)]
    [Icon("Assets/Examples/Icons/Variant-Circle.png")]
    class Circle : EditorTool {}

    [EditorTool("Square (Custom Global)", variantGroup = typeof(ShapeVariantGroup), variantPriority = 0)]
    [Icon("Assets/Examples/Icons/Variant-Square.png")]
    class Square : EditorTool {}
}

构造函数

继承的成员