【摘要】 当利用OpenGL的选择机制时,需要首先在缓存中绘制场景,然后进入选择模式并重新绘制场景。在退出选择模式时,OpenGL返回一个与视图体相交的图元表。针对OpenGL中选择机制使用比较繁琐的现状,提出了一种新的思路,就是采用对象缓冲区(Object Buffer)的方法来实现选择拾取的功能。该方法通过建立对象缓冲区来识别所要拾取的元素,目前已在CAD软件开发过程中予以应用。更多还原

【Abstract】 When using Selection of OpenGL, scene must be drawn in buffer firstly, then enter the selection mode and redraw the scene. As quit the selection mode, OpenGL returns the table crossed by the window user defined. Because of using Selection of OpenGL miscellaneously, the new method is promoted, that is using Object-Buffer to realize the function of pick-object. The method distinguishes elements by Object-Buffer, and has been used during the development of CAD system.更多还原