next work: support 3-way coordinate system in VertexColor2D material.

inc/hgl/graph/mtl/StdMaterial.h

@@ -1,6 +1,19 @@
-#pragma once
+#pragma once
 
 #define STD_MTL_NAMESPACE_BEGIN namespace hgl{namespace graph{namespace mtl{
 #define STD_MTL_NAMESPACE_END   }}}
 
 #define STD_MTL_NAMESPACE_USING using namespace hgl::graph::mtl
+
+enum class CoordinateSystem2D
+{
+    NDC,
+    ZeroToOne,          //左上角为0,0；右下角为1,1
+    Ortho               //左上角为0,0；右下角为(width-1),(height-1)
+};
+
+namespace GlobalShaderUBO
+{
+    constexpr const char ViewportInfo[]="ViewportInfo";
+    constexpr const char CameraInfo[]="CameraInfo";
+}