Initial release of the Unity plugin.

PiperOrigin-RevId: 425947505

unity/Editor/Components/AbsoluteValuePropertyEditor.cs

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+// Copyright 2019 DeepMind Technologies Limited
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+using UnityEditor;
+using UnityEngine;
+
+namespace Mujoco {
+
+  [CustomPropertyDrawer(typeof(AbsoluteValueAttribute))]
+  public class AbsoluteValuePropertyDrawer : PropertyDrawer {
+    public override void OnGUI(Rect position, SerializedProperty property, GUIContent label) {
+      property.floatValue = Mathf.Abs(EditorGUI.FloatField(position, label, property.floatValue));
+    }
+  }
+}