In the multimedia room there is an expandable shelf with a projector sliding down from the ceiling and a movable projection screen right by the window acting also as a sun blind.
在多媒体室有可扩展的架子，带有从天花板滑下的投影，还有可移动投影屏，正好在窗户旁也能充当窗帘。
2
Get the projection matrix exactly right and use of the default Oculus head model.
使用Oculus默认的头部模型(head Model)和并使得投影矩阵完全正确。
3
The left and right borders are determined based on the vertical projection of the characteristic image.