add some reading function

LibCmo/CK2/ObjImpls/CKMesh.hpp

@@ -23,6 +23,9 @@ namespace LibCmo::CK2::ObjImpls {
 		// ===== Misc Section =====
 	public:
 		void CleanMesh();
+	protected:
+		void BuildNormals();
+		void BuildFaceNormals();
 
 		// ===== Line Section =====
 	public:
@@ -73,6 +76,13 @@ namespace LibCmo::CK2::ObjImpls {
 		void SyncMtlChannelToFaceMask();	// request all face accept all material channels.
 
 	protected:
+		enum class VertexSaveFlags : CKDWORD {
+			SingleColor = 0x1u,	/**< if not set, the VertexColor is a list<73><74> otherwise a single global CKDWORD.*/
+			SingleSpecularColor = 0x2u,	/**< if not set, the VertexSpecularColor is a list<73><74> otherwise a single global CKDWORD. */
+			NoNormal = 0x4u,	/**< if set, there are no normal data for vertex. */
+			SingleUV = 0x8u,	/**< if not set, the VertexUV is a list<73><74> otherwise a single global VxVertex2. */
+			NoPos = 0x10u,	/**< if set, there are no position data for vertex. */
+		};
 		struct FaceData_t {
 			FaceData_t() :
 				m_Normal(),