利用OpenGL实现屏幕坐标与世界坐标的相互变换  

Using OpenGl to solve the transformation between screen coordinate and world coordinate

作　　者：李志华[1] 徐静[1] 张庆顺[2] 王彬丽[1] 王玉彩[3] 马永强[1] 

机构地区：[1]河北工程学院信电学院,河北邯郸056038 [2]河北大学,河北保定071002 [3]石家庄铁路职业技术学院,河北石家庄050041

出　　处：《河北建筑科技学院学报》2005年第3期83-86,共4页Journal of Hebei Institute of Architectural Science & Technology

摘　　要：屏幕坐标是二维坐标,世界坐标是三维坐标,在计算机图形处理中,两坐标系间的相互变换是必不可少的。OpenGL是近年发展起来的一个性能卓越的三维图形工业标准,有着强大的图形功能和良好的跨平台移植能力。利用OpenGL的成像原理以及深度缓存信息技术,实现了屏幕坐标系与世界坐标系间的变换算法,具有通用性,已应用于建立虚拟腧穴三维模型的研究课题中。经验证,算法简单快捷,达到课题对于坐标变换算法的速度、精度的要求。Screen coordinate is 2D coordinate and world coordinate is 3D coordinate. In the processing of computer graphics, it is necessary to solve the problem-transformation between screen coordinate and world coordinate. OpenGL is a perfect industy criterion for 3D graphics, which has powerful function of graphics and is quickly developed in recent years. The arithmetic is presented to solve the transformation between screen coordinate and world coordinate, which uses the prospective image arithmetic and Z - Depth buffer of OpenGL, and is suitable for many occasion. It has been used in programmer - founding ficititious 3D model of the acupoint. The arithmetic is proved to be simple and effective, and meets the need of the speed and accuracy.

关 键 词：屏幕坐标 世界坐标 深度信息 OPENGL 

分 类 号：TP391[自动化与计算机技术—计算机应用技术]