Home › Forums › GAMES在线课程(现代计算机图形学入门)讨论区 › 关于投影过程的疑问 This topic has 2 replies, 3 voices, and was last updated 4 years, 5 months ago by zpo. Viewing 2 reply threads Author Posts 2020年3月5日 at 下午4:21 #3321 Score: 0 wffancyParticipant Karma: 1 pt 投影矩阵设置的fov为45度,相机在原点朝向-z方向,为什么(0,2,-2)这样的点会落在frustum里呢,在z=-2这个平面上xy的显示范围不应该是-0.84~0.84(2*tan(22.5))吗?求教! 2020年3月5日 at 下午9:09 #3338 Score: 1 slongle(助教)Keymaster Karma: 13 pts 要算摄像机到点的距离,所以应该是7,xy的范围是+/-2.899(7*tan(22.5))。 This post has received 1 vote up. 2020年3月11日 at 下午2:13 #3749 Score: 0 zpoParticipant 楼主应该是没考虑view/camera transformation吧,框架代码里相机的位置在(0,0,5) Eigen::Vector3f eye_pos = {0, 0, 5}; Author Posts Viewing 2 reply threads You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In