Handles.ScaleValueHandle

参数

返回

float 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，则将返回您传递给相应函数的值。

描述

创建一个缩放单个浮点的 3D 手柄。

此方法将会在屏幕上绘制一个可拖动的 3D 手柄。该手柄不会移动并将会上下缩放单个浮点。\ \ \ 场景视图中的缩放值手柄（箭头端盖作为手柄）。\ \ 将以下脚本作为 LightColorLerp.cs 添加到 Assets 文件夹，然后将 LightColorLerp 组件添加到场景中的对象。

using UnityEngine;

[ExecuteInEditMode, RequireComponent(typeof(Light))]
public class LightColorLerp : MonoBehaviour
{
    [SerializeField]
    private Color m_Color1 = Color.red;
    [SerializeField]
    private Color m_Color2 = Color.green;

    public float amount { get { return m_Amount; } set { m_Amount = Mathf.Clamp01(value); } }
    [SerializeField, Range(0f, 1f)]
    private float m_Amount = 1f;

    private Light m_Light;

    protected virtual void OnEnable()
    {
        m_Light = GetComponent<Light>();
    }

    public virtual void Update()
    {
        m_Light.color = Color.Lerp(m_Color1, m_Color2, m_Amount);
    }
}

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

using UnityEditor;
using UnityEngine;

[CustomEditor(typeof(LightColorLerp)), CanEditMultipleObjects]
public class LightColorLerpEditor : Editor
{
    protected virtual void OnSceneGUI()
    {
        LightColorLerp colorLerp = (LightColorLerp)target;

        float size = HandleUtility.GetHandleSize(colorLerp.transform.position) * 5f;
        float snap = 0.1f;

        EditorGUI.BeginChangeCheck();
        float newAmount = Handles.ScaleValueHandle(colorLerp.amount, colorLerp.transform.position, Quaternion.identity, size, Handles.ArrowHandleCap, snap);
        if (EditorGUI.EndChangeCheck())
        {
            Undo.RecordObject(colorLerp, "Change Light Color Interpolation");
            colorLerp.amount = newAmount;
            colorLerp.Update();
        }
    }
}