我用 GluPerspective 和 glLookAt 来设置我的投影矩阵和查看矩阵。 如果我想获得眼睛的坐标, 它就是 GluLookAt 前三个参数, 对不对?
但是,现在我需要得到投影飞机,也就是屏幕在世界坐标系统中的位置。你知道, 如果我能计算到左下角角点和右上角点, 飞机就在那里!
有人能告诉我怎么计算吗?
您可以使用带屏幕空间坐标的 gluun Project (映射视图宽度和高度为 0.. 1) A = (0,0,0,0, B = 1,0) 和 C = 1,0) 来显示投影平面的共平面点。 添加第四点(1,1,0) 时, 您可以得到矩形限制 。
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