Initial commit

Assets/Alloy/Scripts/Editor/AlloyPropertyDrawers.cs

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+// Alloy Physical Shader Framework
+// Copyright 2013-2017 RUST LLC.
+// http://www.alloy.rustltd.com/
+
+using UnityEditor;
+using UnityEngine;
+
+
+[CustomPropertyDrawer(typeof(MinValueAttribute))]
+public class MinValueDrawer : PropertyDrawer {
+    // Draw the property inside the given rect
+    public override void OnGUI(Rect position, SerializedProperty property, GUIContent label) {
+        // Using BeginProperty / EndProperty on the parent property means that
+        // prefab override logic works on the entire property.
+        EditorGUI.BeginProperty(position, label, property);
+
+        // Draw label
+        EditorGUI.BeginChangeCheck();
+
+        float newVal = EditorGUI.FloatField(position, label, property.floatValue);
+        
+        if (EditorGUI.EndChangeCheck()) {
+            newVal = Mathf.Max((attribute as MinValueAttribute).Min, newVal);
+            property.floatValue = newVal;
+        }
+
+        EditorGUI.EndProperty();
+    }
+}
+
+[CustomPropertyDrawer(typeof(MaxValueAttribute))]
+public class MaxValueDrawer : PropertyDrawer {
+    // Draw the property inside the given rect
+    public override void OnGUI(Rect position, SerializedProperty property, GUIContent label) {
+        // Using BeginProperty / EndProperty on the parent property means that
+        // prefab override logic works on the entire property.
+        EditorGUI.BeginProperty(position, label, property);
+
+        // Draw label
+
+        EditorGUI.BeginChangeCheck();
+
+        float newVal = EditorGUI.FloatField(position, label, property.floatValue);
+
+        if (EditorGUI.EndChangeCheck()) {
+            newVal = Mathf.Min((attribute as MaxValueAttribute).Max, newVal);
+            property.floatValue = newVal;
+        }
+        EditorGUI.EndProperty();
+    }
+}