From be338ecf2e99d8bfcf794a75f133146133d01e9a Mon Sep 17 00:00:00 2001
From: hyzboy <hyzboy@gmail.com>
Date: Wed, 29 May 2019 21:56:53 +0800
Subject: [PATCH] =?UTF-8?q?=E5=A2=9E=E5=8A=A0=E7=9F=A9=E9=98=B5=E5=8F=98?=
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---
 src/SceneGraph/Camera.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/SceneGraph/Camera.cpp b/src/SceneGraph/Camera.cpp
index 14c4357a..0712a798 100644
--- a/src/SceneGraph/Camera.cpp
+++ b/src/SceneGraph/Camera.cpp
@@ -34,6 +34,9 @@ namespace hgl
 
             matrix.mvp=matrix.projection*matrix.modelview;
 
+            //注意： C++中要 projection * model_view * local_to_world * position
+            //而GLSL中要 position * local_to_world * model_view * projection
+
             matrix.two_dim=ortho(width,height,znear,zfar);
 
             frustum.SetVerticalFovAndAspectRatio(DegToRad(fov),width/height);