Disposable helper struct for automatically setting and reverting Handles.color and/or Handles.matrix.
This struct allows you to temporarily set the value of Handles.color and/or Handles.matrix inside of a block of code and automatically revert them to their previous values when the scope is exited.
using UnityEditor; using UnityEngine;
// a custom editor that draws a labeled circle around the selected MeshRenderer in the scene view [CustomEditor(typeof(MeshRenderer))] public class MeshRendererEditor : Editor { protected virtual void OnSceneGUI() { MeshRenderer meshRenderer = (MeshRenderer)target;
// get an orientation pointing from the selected object to the camera Vector3 cameraToTarget = Camera.current.transform.position - meshRenderer.transform.position; Quaternion billboardOrientation = Quaternion.LookRotation(cameraToTarget, Camera.current.transform.up);
// set the handle matrix to the target's position, oriented facing the camera Matrix4x4 matrix = Matrix4x4.TRS(meshRenderer.transform.position, billboardOrientation, Vector3.one); using (new Handles.DrawingScope(Color.magenta, matrix)) { // draw a magenta circle around the selected object with a label at the top Vector3 size = meshRenderer.bounds.size; float radius = Mathf.Max(size.x, size.y, size.z); Handles.DrawWireArc(Vector3.zero, Vector3.forward, Vector3.right, 360f, radius); Handles.Label(Vector3.up * radius, meshRenderer.name); } } }
| originalColor | The value of Handles.color at the time this DrawingScope was created. |
| originalMatrix | The value of Handles.matrix at the time this DrawingScope was created. |
| Handles.DrawingScope | Create a new DrawingScope and set Handles.color and/or Handles.matrix to the specified values. |
| Dispose | Automatically reverts Handles.color and Handles.matrix to their values prior to entering the scope, when the scope is exited. You do not need to call this method manually. |
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