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图形技术之坐标转换
2022-06-24 06:43:00 【Kenight_】
转换过程


坐标剪裁在透视除法之前执行,剪裁坐标中的 x, y, z 将与 w 进行检测,在 [-w, w] 之外的顶点将被剪裁掉
这个 w 来自何方:w 是由 PROJECTION Matrix 变换后添加的齐次坐标,它的值来等于摄像机坐标下的 -z 值 (摄像机坐标使用右手坐标系),且它的范围一定在 [near, far] 之间,否则就被剪裁掉了
之后透视除法与视口变换将由 GPU 自动执行,随后传入 fragment shader
转换过程中的坐标数据

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