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Help Wanted Why when using editor script with handles with DrawSolidArc it's not drawing any arc ?

Discussion in 'Immediate Mode GUI (IMGUI)' started by shamenraze1988, Mar 6, 2021.

  1. shamenraze1988

    shamenraze1988

    Joined:
    Nov 24, 2020
    Posts:
    208
    This is the editor script is in the Assets/Editor

    Code (csharp):
    1.  
    2. using UnityEngine;
    3. using UnityEditor;
    4.  
    5. [CustomEditor(typeof(DrawSolidArc))]
    6. public class DrawSolidArcEditor : Editor
    7. {
    8.    public float arrowSize = 1;
    9.  
    10.    void OnSceneGUI()
    11.    {
    12.        DrawSolidArc t = target as DrawSolidArc;
    13.  
    14.        Handles.color = Color.blue;
    15.        Handles.Label(t.transform.position + Vector3.up * 2,
    16.                             t.transform.position.ToString() + "\nShieldArea: " +
    17.                             t.shieldArea.ToString());
    18.  
    19.        Handles.BeginGUI();
    20.        GUILayout.BeginArea(new Rect(Screen.width - 100, Screen.height - 80, 90, 50));
    21.  
    22.        if (GUILayout.Button("Reset Area"))
    23.            t.shieldArea = 5;
    24.  
    25.        GUILayout.EndArea();
    26.        Handles.EndGUI();
    27.  
    28.        Handles.color = new Color(1, 1, 1, 0.2f);
    29.        Handles.DrawSolidArc(t.transform.position, t.transform.up, -t.transform.right,
    30.                                180, t.shieldArea);
    31.  
    32.        Handles.color = Color.white;
    33.        t.shieldArea = Handles.ScaleValueHandle(t.shieldArea,
    34.                        t.transform.position + t.transform.forward * t.shieldArea,
    35.                        t.transform.rotation, 1, Handles.ConeHandleCap, 1);
    36.    }
    37. }
    38.  
    And the mono script for example this script is attached to a simple 3d cube :

    Code (csharp):
    1.  
    2. using UnityEngine;
    3.  
    4. [ExecuteInEditMode]
    5. public class DrawSolidArc : MonoBehaviour
    6. {
    7.    public float shieldArea = 5;
    8. }
    9.  
    but there is nothing around the cube. not also near it nothing. it should draw arch in the editor.

    Later I want to be able to use the mouse with a click down and drag to be able to change the arc size but for not it's not drawing any arc.

    I took the example from the unity official docs :

    https://docs.unity3d.com/540/Documentation/ScriptReference/Handles.DrawSolidArc.html

    I noticed now also for example that I don't see the gui button in the inspector of the object that the mono script is attached to :

    Code (csharp):
    1.  
    2. if (GUILayout.Button("Reset Area"))
    3.  
    not sure what's wrong with the editor script.


    This is working. I still wonder why the unity docs example didn't work but this is working and I don't need the editor script. The problem with this script is that I must to turn on the Gizmos in the editor and I don't want to make it turned on all the time. So it's working but not as I wanted.

    I want to draw the arc without the gizmos.

    Code (csharp):
    1.  
    2. using UnityEngine;
    3.  
    4. [ExecuteInEditMode]
    5. public class DrawSolidArc : MonoBehaviour
    6. {
    7.    public Vector3 offset = Vector3.one;
    8.    public float fieldOfViewAngle = 20;
    9.    public float viewDistance = 4;
    10.    public bool usePhysics2D = false;
    11.  
    12.    public void OnDrawGizmos()
    13.    {
    14.        DrawLineOfSight(this.transform, offset, fieldOfViewAngle, viewDistance, usePhysics2D);
    15.    }
    16.    public static void DrawLineOfSight(Transform transform, Vector3 positionOffset, float fieldOfViewAngle, float viewDistance, bool usePhysics2D)
    17.    {
    18. #if UNITY_EDITOR
    19.        var oldColor = UnityEditor.Handles.color;
    20.        var color = Color.yellow;
    21.        color.a = 0.1f;
    22.        UnityEditor.Handles.color = color;
    23.        var halfFOV = fieldOfViewAngle * 0.5f;
    24.        var beginDirection = Quaternion.AngleAxis(-halfFOV, (usePhysics2D ? Vector3.forward : Vector3.up)) * (usePhysics2D ? transform.up : transform.forward);
    25.        UnityEditor.Handles.DrawSolidArc(transform.TransformPoint(positionOffset), (usePhysics2D ? transform.forward : transform.up), beginDirection, fieldOfViewAngle, viewDistance);
    26.        UnityEditor.Handles.color = oldColor;
    27. #endif
    28.    }
    29. }
    30.  
     
    Last edited: Mar 6, 2021
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