struct OdOpenGLFillPatt { enum Entry { kFillPattTransparency = 0, kFillPattMaterial, kFillPattFillstyle, kFillPattSel, kFillPattAll }; union Data { OdUInt32 summ; OdUInt8 reg[4]; struct Registers { OdUInt8 reg_transparency; OdUInt8 reg_material; OdUInt8 reg_fillstyle; OdUInt8 reg_sel; } named; } data; };