Camera.ScreenToViewportPoint 屏幕转视窗位置

function ScreenToViewportPoint (position : Vector3) : Vector3

Description描述

Transforms position from screen space into viewport space.

从屏幕空间到视窗空间的变换位置。

Screenspace is defined in pixels. The bottom-left of the screen is (0,0); the right-top is (pixelWidth,pixelHeight). The z position is in world units from the camera.

屏幕空间以像素定义。屏幕的左下为（0,0）；右上是(pixelWidth,pixelHeight)，Z的位置是以世界单位衡量的到相机的距离。

Viewport space is normalized and relative to the camera. The bottom-left of the camera is (0,0); the top-right is (1,1). The z position is in world units from the camera.

视口空间是规范化的并相对于相机。相机的左下为（0,0）；右上是（1,1），Z的位置是以世界单位衡量的到相机的距离。