Home › Forums › GAMES在线课程(现代计算机图形学入门)讨论区 › 作业5 为什么y轴是反的 This topic has 3 replies, 3 voices, and was last updated 3 years, 5 months ago by zzzlll. Viewing 3 reply threads Author Posts 2021年5月25日 at 下午11:24 #8486 Score: 0 SumanParticipant 这里是考虑做透视投影,从屏幕坐标的每个像素点发出光线,光线方向是该从摄影机指向该像素点的单位向量,这样实质上形成一个视锥体,但获得的图像却是上下颠倒的,将光线的y轴方向反向后才正常,为什么会这样呢? Attachments:You must be logged in to view attached files. 2021年5月25日 at 下午11:26 #8488 Score: 0 SumanParticipant 这是渲染结果 Attachments:You must be logged in to view attached files. 2021年5月26日 at 上午9:20 #8490 Score: 0 小木子Participant Karma: -1 pt 同问 This reply was modified 3 years, 5 months ago by 小木子. 2021年6月10日 at 下午3:40 #8655 Score: 0 zzzlllParticipant 我猜测是因为成像平面和像素坐标的转换不正确造成的(因为上课也没有具体提,我也是根据结果反推猜测的),具体如下: Attachments:You must be logged in to view attached files. Author Posts Viewing 3 reply threads You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In