public override void OnInspectorGUI()
        {
            AngleConstraintMB mb = (AngleConstraintMB)target;

            mb.enabled = EditorGUILayout.Toggle("Enabled", mb.enabled);

            EditorGUI.BeginChangeCheck();
            mb.nextJoint = EditorGUILayout.ObjectField("nextJoint", mb.nextJoint, typeof(Transform), true) as Transform;
            if (EditorGUI.EndChangeCheck())
            {
                EUtil.SetDirty(mb);
                EUtil.RepaintSceneView();
            }

            if (mb.nextJoint == null)
            {
                EditorGUILayout.LabelField("Set the nextJoint first...");
                return;
            }
            else
            {
                EUtil.PushGUIEnable(mb.enabled);

                GUILayout.BeginHorizontal();
                {
                    GUILayout.Space(30f);
                    if (EUtil.Button("ReInit", "decide all the parameters with default method", Color.green))
                    {
                        Undo.RecordObject(mb, "ReInit");
                        mb.AutoSetParameters();
                        EUtil.SetDirty(mb);
                        EUtil.RepaintSceneView();
                    }
                    GUILayout.Space(30f);
                }
                GUILayout.EndHorizontal();

                // min/max limit
                float min = mb.minLimit;
                float max = mb.maxLimit;
                EditorGUI.BeginChangeCheck();
                EUtil.DrawMinMaxSlider("Angle Limits", ref min, ref max, -180f, 180f);
                if (EditorGUI.EndChangeCheck())
                {
                    Undo.RecordObject(mb, "Modify Angle limits");
                    mb.minLimit = min;
                    mb.maxLimit = max;
                    EUtil.SetDirty(mb);
                    EUtil.RepaintSceneView();
                }

                EditorGUI.BeginChangeCheck();
                Vector3 newRotAxis  = EUtil.DrawV3P(new GUIContent("Rotation Axis", "in parent space, in world space if no parent joint"), mb.rotAxis);
                Vector3 newPrimAxis = EUtil.DrawV3P(new GUIContent("Primary Axis", "in parent space, in world space if no parent joint"), mb.primAxis);
                if (EditorGUI.EndChangeCheck())
                {
                    Undo.RecordObject(mb, "Modify Constraint parameters");
                    mb.rotAxis  = newRotAxis;
                    mb.primAxis = newPrimAxis;
                    mb.CalcInitData(); //!! recalc the startLocalRot
                    EUtil.SetDirty(mb);
                    EUtil.RepaintSceneView();
                }

                ms_showDisplaySetting = EditorGUILayout.Foldout(ms_showDisplaySetting, "Display Settings:");
                if (ms_showDisplaySetting)
                {
                    EditorGUI.BeginChangeCheck();
                    ms_markerSize = EditorGUILayout.FloatField("ArcSize", ms_markerSize);
                    ms_arcColor   = EditorGUILayout.ColorField("ArcColor", ms_arcColor);
                    if (EditorGUI.EndChangeCheck())
                    {
                        EUtil.RepaintSceneView();
                    }
                }

                EUtil.PopGUIEnable();
            }
        }
        public override void OnInspectorGUI()
        {
            ConeConstraintMB mb = (ConeConstraintMB)target;

            mb.enabled = EditorGUILayout.Toggle("Enabled", mb.enabled);

            EditorGUI.BeginChangeCheck();
            mb.nextJoint = EditorGUILayout.ObjectField("nextJoint", mb.nextJoint, typeof(Transform), true) as Transform;
            if (EditorGUI.EndChangeCheck())
            {
                EUtil.RepaintSceneView();
            }

            if (mb.nextJoint == null)
            {
                EditorGUILayout.LabelField("Set the nextJoint first...");
                return;
            }
            else
            {
                EUtil.PushGUIEnable(mb.enabled);

                EditorGUILayout.BeginHorizontal();
                {
                    GUILayout.Space(30f);
                    if (EUtil.Button("ReInit", "decide all the parameters with default method", Color.green))
                    {
                        Undo.RecordObject(mb, "AutoInit");
                        mb._AutoSetParameters();
                        EUtil.RepaintSceneView();
                    }
                    GUILayout.Space(30f);
                }
                EditorGUILayout.EndHorizontal();

                // angle limit
                EditorGUI.BeginChangeCheck();
                float newAngleLimit = EditorGUILayout.Slider(CONT_AngleLimit, mb.angleLimit, 0, 180f);
                if (EditorGUI.EndChangeCheck())
                {
                    Undo.RecordObject(mb, "Modify Angle Limit");
                    mb.angleLimit = newAngleLimit;
                    EUtil.RepaintSceneView();
                }

                // ref-Axis
                EditorGUI.BeginChangeCheck();
                Vector3 newRefAxis = EUtil.DrawV3P(CONT_RefAxis, mb.refAxis);
                if (EditorGUI.EndChangeCheck())
                {
                    Undo.RecordObject(mb, "Modify ref axis");
                    mb.refAxis = newRefAxis;
                    mb.CalcInitData(); //!! recalc the startTwistRot
                    EUtil.RepaintSceneView();
                }

                mb.limitTwist = EditorGUILayout.Toggle(CONT_LimitTwist, mb.limitTwist);
                if (mb.limitTwist)
                {
                    float min = mb.minTwistLimit;
                    float max = mb.maxTwistLimit;
                    EditorGUI.BeginChangeCheck();
                    EUtil.DrawMinMaxSlider("Twist Limits", ref min, ref max, -180f, 180f);
                    if (EditorGUI.EndChangeCheck())
                    {
                        Undo.RecordObject(mb, "Modify twist limits");
                        mb.minTwistLimit = min;
                        mb.maxTwistLimit = max;
                        EUtil.RepaintSceneView();
                    }

                    EditorGUILayout.LabelField("Current twist: " + mb.CalcTwist());
                }

                ms_showDisplaySetting = EditorGUILayout.Foldout(ms_showDisplaySetting, "Display Settings:");
                if (ms_showDisplaySetting)
                {
                    EditorGUI.BeginChangeCheck();
                    ms_markerSize  = EditorGUILayout.FloatField("Marker size", ms_markerSize);
                    ms_markerColor = EditorGUILayout.ColorField("Marker color", ms_markerColor);
                    if (EditorGUI.EndChangeCheck())
                    {
                        EUtil.RepaintSceneView();
                    }
                }

                EUtil.PopGUIEnable();
            }
        }