feat: shrink rendering by material

NOTE: Performance will be improved, but in some cases the rendering is not correct.

Close #113

Scripts/Editor/UIParticleEditor.cs

@@ -29,6 +29,7 @@ namespace Coffee.UIExtensions
         private SerializedProperty _spScale;
         private SerializedProperty _spIgnoreCanvasScaler;
         private SerializedProperty _spAnimatableProperties;
+        private SerializedProperty _spShrinkByMaterial;
 
         private ReorderableList _ro;
         private bool _xyzMode;
@@ -57,6 +58,7 @@ namespace Coffee.UIExtensions
             _spScale = serializedObject.FindProperty("m_Scale3D");
             _spIgnoreCanvasScaler = serializedObject.FindProperty("m_IgnoreCanvasScaler");
             _spAnimatableProperties = serializedObject.FindProperty("m_AnimatableProperties");
+            _spShrinkByMaterial = serializedObject.FindProperty("m_ShrinkByMaterial");
 
             var sp = serializedObject.FindProperty("m_Particles");
             _ro = new ReorderableList(sp.serializedObject, sp, true, true, true, true);
@@ -164,6 +166,9 @@ namespace Coffee.UIExtensions
                     t.SetMaterialDirty();
             }
 
+            // ShrinkByMaterial
+            EditorGUILayout.PropertyField(_spShrinkByMaterial);
+
             // Target ParticleSystems.
             _ro.DoLayoutList();
 

Scripts/UIParticle.cs

@@ -41,6 +41,9 @@ namespace Coffee.UIExtensions
         [Tooltip("Particles")] [SerializeField]
         private List<ParticleSystem> m_Particles = new List<ParticleSystem>();
 
+        [Tooltip("Shrink rendering by material on refresh.\nNOTE: Performance will be improved, but in some cases the rendering is not correct.")] [SerializeField]
+        bool m_ShrinkByMaterial = false;
+
 #if !SERIALIZE_FIELD_MASKABLE
         [SerializeField] private bool m_Maskable = true;
 #endif
@@ -81,6 +84,17 @@ namespace Coffee.UIExtensions
             }
         }
 
+        public bool shrinkByMaterial
+        {
+            get { return m_ShrinkByMaterial; }
+            set
+            {
+                if (m_ShrinkByMaterial == value) return;
+                m_ShrinkByMaterial = value;
+                RefreshParticles();
+            }
+        }
+
         /// <summary>
         /// Particle effect scale.
         /// </summary>
@@ -217,7 +231,7 @@ namespace Coffee.UIExtensions
             }
 
             particles.Exec(p => p.GetComponent<ParticleSystemRenderer>().enabled = !enabled);
-            particles.SortForRendering(transform);
+            particles.SortForRendering(transform, m_ShrinkByMaterial);
 
             SetMaterialDirty();
         }

Scripts/Utils.cs

@@ -185,7 +185,7 @@ namespace Coffee.UIParticleExtensions
 
     internal static class ParticleSystemExtensions
     {
-        public static void SortForRendering(this List<ParticleSystem> self, Transform transform)
+        public static void SortForRendering(this List<ParticleSystem> self, Transform transform, bool sortByMaterial)
         {
             self.Sort((a, b) =>
             {
@@ -200,6 +200,9 @@ namespace Coffee.UIParticleExtensions
                 if (!aMat) return -1;
                 if (!bMat) return 1;
 
+                if (sortByMaterial)
+                    return aMat.GetInstanceID() - bMat.GetInstanceID();
+
                 if (aMat.renderQueue != bMat.renderQueue)
                     return aMat.renderQueue - bMat.renderQueue;