From 6741ad9cc678acec57730b3c1fc9cdd9bcb9a017 Mon Sep 17 00:00:00 2001
From: hyzboy <hyzboy@gmail.com>
Date: Tue, 27 Nov 2018 21:33:38 +0800
Subject: [PATCH] =?UTF-8?q?=E5=A2=9E=E5=8A=A0=E6=B3=A8=E9=87=8A?=
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---
 example/NullWindow/main.cpp | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/example/NullWindow/main.cpp b/example/NullWindow/main.cpp
index e6f39628..d82f47db 100644
--- a/example/NullWindow/main.cpp
+++ b/example/NullWindow/main.cpp
@@ -31,16 +31,16 @@ int main(void)
 
     win->Show();
 
-    glClearColor(0,0,0,1);
+    glClearColor(0,0,0,1);              //设置清屏颜色
 
     while(win->IsOpen())
     {
-        win->MakeToCurrent();
+        win->MakeToCurrent();           //切换当前窗口到前台
 
-        glClear(GL_COLOR_BUFFER_BIT);
+        glClear(GL_COLOR_BUFFER_BIT);   //清屏
 
-        win->SwapBuffer();
-        win->PollEvent();
+        win->SwapBuffer();              //交换前后台显示缓冲区
+        win->PollEvent();               //处理窗口事件
     }
 
     delete win;