摘要：The 3D model technology of virtual plant has been widely used in agricultural research fields. However, in most cases, the process of achieving the coordinate information of the plant and building the 3D model of the plant is done separately, so the error could not be analyzed directly. The purpose of this paper is to utilize VC++ and OpenGL to build up a real-time drawing system based on 3D movement tracker—Polhemus Fastrak. Using the method of combining programming of Microsoft Basic Class(MFC) and OpenGL to create drawing window and connect Polhemus Fastrak, the real-time drawing system has been made. The visible modes of the dynamic drawing system and the error through comparing the appearance and area of the images to the physical objects have been discussed. Taking square, circle, triangle and real plant leaves as test examples, the area errors are less than 10%, and the average error is about 4.9%, which improve that the drawing system is feasible.
