Using OpenGl to solve the transformation between screen coordinate and world coordinate
Zhihua Li · 2005
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 industry 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.