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Handles.ScaleValueHandle

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public static method ScaleValueHandle(value: float, position: Vector3, rotation: Quaternion, size: float, capFunction: Handles.CapFunction, snap: float): float;
public static float ScaleValueHandle(float value, Vector3 position, Quaternion rotation, float size, Handles.CapFunction capFunction, float snap);

Parameters

value The value the user can modify.
position The position of the handle in the space of Handles.matrix.
rotation The rotation of the handle in the space of Handles.matrix.
size The size of the handle in the space of Handles.matrix. Use HandleUtility.GetHandleSize if you want a constant screen-space size.
snap The snap increment. See Handles.SnapValue.
capFunction The function to call for doing the actual drawing.

Returns

float The new value modified by the user's interaction with the handle. If the user has not moved the handle, it will return the same value as you passed into the function.

Description

Make a 3D handle that scales a single float.

This method will draw a 3D-draggable handle on the screen. The handle does not move and will scale a single float up and down.


Scale Value handle in the scene view with an arrow cap as the handle.

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

#pragma strict
@ExecuteInEditMode
@RequireComponent(Light)
public class LightColorLerp extends MonoBehaviour {
	@SerializeField
	private var m_Color1: Color = Color.red;
	@SerializeField
	private var m_Color2: Color = Color.green;
	floatamount {
		return m_Amount;
	}
	 {
		m_Amount = Mathf.Clamp01(value);
	}
	@SerializeField
	@Range(0f, 1f)
	private var m_Amount: float = 1f;
	private var m_Light: Light;
	protected virtual function OnEnable() {
		m_Light = GetComponent.<Light>();
	}
	public virtual function Update() {
		m_Light.color = Color.Lerp(m_Color1, m_Color2, m_Amount);
	}
}
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); } }

Add the following script to Assets/Editor as LightColorLerpEditor.cs and select the object with the LightColorLerp component.

#pragma strict
@CustomEditor(LightColorLerp)
@CanEditMultipleObjects
public class LightColorLerpEditor extends Editor {
	protected virtual function OnSceneGUI() {
		var colorLerp: LightColorLerp = LightColorLerptarget;
		var size: float = HandleUtility.GetHandleSize(colorLerp.transform.position) * 5f;
		var snap: float = 0.1f;
		EditorGUI.BeginChangeCheck();
		var newAmount: float = 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();
		}
	}
}
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(); } } }

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