AVR_GrabNodeEditor.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEditor;

using AVR.Phys;

namespace AVR.UEditor.Phys {
    [CustomEditor(typeof(AVR_GrabNode), true)]
    public class AVR_GrabNode_Editor : AVR.UEditor.Core.AVR_Behaviour_Editor
    {
        private bool drawDebugHand => debugHand!=null;

        private GameObject debugHand = null;

        public override void OnInspectorGUI()
        {
            base.OnInspectorGUI();

            if (!drawDebugHand && GUILayout.Button("Draw DebugHand"))
            {
                debugHand = AVR.UEditor.Core.AVR_EditorUtility.InstantiatePrefabAsChild(((AVR_GrabNode)target).transform, "/editor/defaultPrefabPaths/debugHand");
            }
            else if(drawDebugHand && GUILayout.Button("Hide DebugHand"))
            {
                GameObject.DestroyImmediate(debugHand);
            }
        }

        void OnEnable() {
            try {
                debugHand = ((AVR_GrabNode)target).GetComponentInChildren<AVR.Phys.AVR_DebugHand>().gameObject;
            } catch(System.Exception) { }
        }

        void OnDisable() {
            if(debugHand) GameObject.DestroyImmediate(debugHand);
        }

        public void OnSceneGUI()
        {
            AVR_GrabNode node = (AVR_GrabNode)target;

            const float angle_arches_size = 0.12f;

            Handles.color = new Color(0, 1, 0, 0.3f);
            Handles.DrawSolidArc(node.transform.position, node.transform.up, node.transform.forward, node.allowed_pitch, angle_arches_size);
            Handles.DrawSolidArc(node.transform.position, node.transform.up, node.transform.forward, -node.allowed_pitch, angle_arches_size);

            Handles.color = new Color(0, 0, 1, 0.3f);
            Handles.DrawSolidArc(node.transform.position, node.transform.forward, node.transform.right, node.allowed_roll, angle_arches_size);
            Handles.DrawSolidArc(node.transform.position, node.transform.forward, node.transform.right, -node.allowed_roll, angle_arches_size);

            Handles.color = new Color(1, 0, 0, 0.3f);
            Handles.DrawSolidArc(node.transform.position, node.transform.right, node.transform.up, node.allowed_yaw, angle_arches_size);
            Handles.DrawSolidArc(node.transform.position, node.transform.right, node.transform.up, -node.allowed_yaw, angle_arches_size);

            Handles.color = Color.yellow;
            const int circle_res = 4;
            for(int i=0; i<circle_res; i++) {
                float fac = ((float)i / circle_res);
                Handles.DrawWireDisc(node.transform.position, fac * node.transform.right + (1f - fac) * node.transform.forward, node.override_radius);
                Handles.DrawWireDisc(node.transform.position, fac * -node.transform.right + (1f - fac) * node.transform.forward, node.override_radius);
            }
            Handles.DrawWireDisc(node.transform.position, node.transform.up, node.override_radius);
        }
    }
}