Handles.Slider2D

public static Vector3 Slider2D (int id, Vector3 handlePos, Vector3 offset, Vector3 handleDir, Vector3 slideDir1, Vector3 slideDir2, float handleSize, Handles.CapFunction capFunction, Vector2 snap, bool drawHelper= false);

public static Vector3 Slider2D (Vector3 handlePos, Vector3 handleDir, Vector3 slideDir1, Vector3 slideDir2, float handleSize, Handles.CapFunction capFunction, float snap, bool drawHelper= false);

public static Vector3 Slider2D (int id, Vector3 handlePos, Vector3 handleDir, Vector3 slideDir1, Vector3 slideDir2, float handleSize, Handles.CapFunction capFunction, Vector2 snap, bool drawHelper= false);

public static Vector3 Slider2D (Vector3 handlePos, Vector3 handleDir, Vector3 slideDir1, Vector3 slideDir2, float handleSize, Handles.CapFunction capFunction, Vector2 snap, bool drawHelper= false);

Parameters

id	（可选）覆盖此 Slider2D 实例的默认 ControlID。
handlePos	Handles.matrix 空间中当前点的位置。
offset	（可选）在 handlePos 渲染 Slider2D，但将 Slider2D 的原点视为 handlePos + 偏移。这对于相对于另一个对象或手柄放置/渲染的 Slider2D 实例非常有用。
handleDir	Handles.matrix 空间中手柄的方向，仅用于手柄渲染。
slideDir1	Handles.matrix 空间中滑动条的移动平面的第一个轴。
slideDir2	Handles.matrix 空间中滑动条的移动平面的第二个轴。
handleSize	Handles.matrix 空间中手柄的大小。如果您想要一个恒定的屏幕空间大小，请使用 HandleUtility.GetHandleSize。
snap	（浮点或 Vector2）沿着两个轴的贴靠增量，可以是一致的，也可以根据每个轴设置。请参阅 Handles.SnapValue。
drawHelper	（默认值：false）拖动时，围绕手柄渲染一个矩形。
capFunction	要在执行实际绘制时调用的函数。

Returns

Vector3 通过用户与手柄的交互修改的新值。如果用户没有移动手柄，则将返回传递给相应函数的位置值。

Description

创建一个沿两个轴定义的平面移动的 3D 滑动条。

This method will draw a 3D-draggable handle on the screen. The handle is constrained to sliding along a plane in 3D space.

2D slider handle in the Scene View.

Add the following script to your Assets folder as Slider2DExample.cs and add the Slider2DExample component to an object in a Scene.

using UnityEngine;

[ExecuteInEditMode]
public class Slider2DExample : MonoBehaviour
{
    public Vector3 targetPosition { get { return m_TargetPosition; } set { m_TargetPosition = value; } }
    [SerializeField]
    private Vector3 m_TargetPosition = new Vector3(1f, 0f, 2f);

    public virtual void Update()
    {
        transform.LookAt(m_TargetPosition);
    }
}

将以下脚本作为 Slider2DExampleEditor.cs 添加到 Assets/Editor，然后选择包含 Slider2DExample 组件的对象。

using UnityEditor;
using UnityEngine;

[CustomEditor(typeof(Slider2DExample)), CanEditMultipleObjects]
public class Slider2DExampleEditor : Editor
{
    protected virtual void OnSceneGUI()
    {
        Slider2DExample example = (Slider2DExample)target;

        float size = HandleUtility.GetHandleSize(example.targetPosition) * 0.5f;
        float snap = 0.1f;
        Vector3 handleDirection = Vector3.up;

        EditorGUI.BeginChangeCheck();
        Vector3 newTargetPosition = Handles.Slider2D(example.targetPosition, handleDirection, Vector3.right, Vector3.forward, size, Handles.CircleHandleCap, snap);
        if (EditorGUI.EndChangeCheck())
        {
            Undo.RecordObject(example, "Change Look At Target Position");
            example.targetPosition = newTargetPosition;
            example.Update();
        }
    }
}

Scripting API

Handles.Slider2D

Parameters

Returns

Description