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我正在尝试在 THREE.js IE 中获取屏幕的“剪辑空间”UV:左下角是 (-1, -1),中心是 (0, 0),右上角是 ( 1, 1)。
我想把它用在我的片段着色器中进行一些计算,但不知道我将如何计算它们。