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Handles.FreeMoveHandle

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public static Vector3 FreeMoveHandle(Vector3 position, Quaternion rotation, float size, Vector3 snap, Handles.CapFunction capFunction);
public static Vector3 FreeMoveHandle(int controlID, Vector3 position, Quaternion rotation, float size, Vector3 snap, Handles.CapFunction capFunction);

Parameters

positionThe position of the handle in the space of Handles.matrix.
rotationThe rotation of the handle in the space of Handles.matrix.
sizeThe size of the handle in the space of Handles.matrix. Use HandleUtility.GetHandleSize if you want a constant screen-space size.
snapThe snap increment on all axes. See Handles.SnapValue.
capFunctionThe function to call for doing the actual drawing.
controlIDThe control ID for the handle.

Returns

Vector3 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 an unconstrained movement handle.

This handle can move freely in all directions. Hold down Ctrl (Cmd on macOS) to snap to the grid (see [wiki:PositioningGameObjects]). Hold Ctrl-Shift (Cmd-Shift on macOS) to snap the object to any Collider surface under the mouse pointer.


Free Move handle in the Scene View.

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

using UnityEngine;

[ExecuteInEditMode] public class FreeMoveHandleExample : 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); } }

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

using UnityEditor;
using UnityEngine;

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

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

EditorGUI.BeginChangeCheck(); Vector3 newTargetPosition = Handles.FreeMoveHandle(example.targetPosition, Quaternion.identity, size, snap, Handles.RectangleHandleCap); if (EditorGUI.EndChangeCheck()) { Undo.RecordObject(example, "Change Look At Target Position"); example.targetPosition = newTargetPosition; example.Update(); } } }

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