新增动态水物理插件

Packages/com.nwh.dynamicwaterphysics/Runtime/WaterObject/WaterObjectMaterial/WaterObjectMaterial.cs

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+// ╔════════════════════════════════════════════════════════════════╗
+// ║    Copyright © 2025 NWH Coding d.o.o.  All rights reserved.    ║
+// ║    Licensed under Unity Asset Store Terms of Service:          ║
+// ║        https://unity.com/legal/as-terms                        ║
+// ║    Use permitted only in compliance with the License.          ║
+// ║    Distributed "AS IS", without warranty of any kind.          ║
+// ╚════════════════════════════════════════════════════════════════╝
+
+#region
+
+using UnityEngine;
+
+#endregion
+
+namespace NWH.DWP2.WaterObjects
+{
+    /// <summary>
+    /// ScriptableObject defining material properties for mass calculation.
+    /// Contains density value used by MassFromVolume to calculate object mass.
+    /// Create via Assets > Create > Dynamic Water Physics 2 > Water Object Material.
+    /// </summary>
+    [CreateAssetMenu(fileName = "WaterObjectMaterial", menuName = "Dynamic Water Physics 2/Water Object Material",
+                     order = 0)]
+    public class WaterObjectMaterial : ScriptableObject
+    {
+        /// <summary>
+        /// Material density in kg/m³.
+        /// Used with mesh volume to calculate realistic object mass.
+        /// Examples: Wood ~600, Ice ~920, Aluminum ~2700, Steel ~7850.
+        /// </summary>
+        public float density = 600;
+    }
+}