Three-dimensional Applications In OpenGL, two-dimensional applications are a special case of three-dimensional graphics Going to 3D Not much changes Use glvertex3*( Have to worry about the order in which polygons are drawn or use hidden-surface removal Polygons should be simple, convex, flat9 Three-dimensional Applications •In OpenGL, two-dimensional applications are a special case of three-dimensional graphics •Going to 3D - Not much changes - Use glVertex3*( ) - Have to worry about the order in which polygons are drawn or use hidden-surface removal - Polygons should be simple, convex, flat