2 files changed, 10 insertions, 1 deletions
diff --git a/Assets/uGUI-2017.1/UnityEngine.UI/UI/Core/Graphics/Graphic.cs b/Assets/uGUI-2017.1/UnityEngine.UI/UI/Core/Graphics/Graphic.cs
index 1ded27a..53cc1bd 100644
--- a/Assets/uGUI-2017.1/UnityEngine.UI/UI/Core/Graphics/Graphic.cs
+++ b/Assets/uGUI-2017.1/UnityEngine.UI/UI/Core/Graphics/Graphic.cs
@@ -177,9 +177,11 @@ namespace UnityEngine.UI
             }
         }
 
+        // 找到父节点中最近的canvas
         private void CacheCanvas()
         {
             var list = ListPool<Canvas>.Get();
+            // 找到所有父节点中所有canvas，从里到外
             gameObject.GetComponentsInParent(false, list);
             if (list.Count > 0)
             {
@@ -235,10 +237,14 @@ namespace UnityEngine.UI
             }
         }
 
+        /// <summary>
+        /// 提交到CanvasRenderer用这个，要应用IMaterialModifier的修改结果
+        /// </summary>
         public virtual Material materialForRendering
         {
             get
             {
+                // 在这里调用IMaterialModifier的修改
                 var components = ListPool<Component>.Get();
                 GetComponents(typeof(IMaterialModifier), components);
 
@@ -380,7 +386,7 @@ namespace UnityEngine.UI
         private void DoMeshGeneration()
         {
             if (rectTransform != null && rectTransform.rect.width >= 0 && rectTransform.rect.height >= 0)
-                OnPopulateMesh(s_VertexHelper);
+                OnPopulateMesh(s_VertexHelper); // 填充vertexHelper
             else
                 s_VertexHelper.Clear(); // clear the vertex helper so invalid graphics dont draw.
 
@@ -394,6 +400,7 @@ namespace UnityEngine.UI
             ListPool<Component>.Release(components);
 
             s_VertexHelper.FillMesh(workerMesh);
+
             // 传入canvasRenderer作为mesh
             canvasRenderer.SetMesh(workerMesh);
         }
diff --git a/Assets/uGUI-2017.1/UnityEngine.UI/UI/Core/Graphics/GraphicRegistry.cs b/Assets/uGUI-2017.1/UnityEngine.UI/UI/Core/Graphics/GraphicRegistry.cs
index ca7eddf..0642792 100644
--- a/Assets/uGUI-2017.1/UnityEngine.UI/UI/Core/Graphics/GraphicRegistry.cs
+++ b/Assets/uGUI-2017.1/UnityEngine.UI/UI/Core/Graphics/GraphicRegistry.cs
@@ -3,10 +3,12 @@ using UnityEngine.UI.Collections;
 
 namespace UnityEngine.UI
 {
+    // 游戏中只有一份单例
     public class GraphicRegistry
     {
         private static GraphicRegistry s_Instance;
 
+        // 按Canvas分类统计Graphic
         private readonly Dictionary<Canvas, IndexedSet<Graphic>> m_Graphics = new Dictionary<Canvas, IndexedSet<Graphic>>();
 
         protected GraphicRegistry()