Home Forums GAMES在线课程(现代计算机图形学入门)讨论区 关于投影矩阵与齐次坐标的问题

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    • #4219 Score: 1
      狂草来书
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      (1)请问一下,如图所示为推导得出的perspective to orthographic 矩阵,我经过分析发现,这个矩阵算出来后的坐标值为齐次坐标下w分量不为1的齐次坐标点(即z不为1时成立),这点我分析的对吗?
      (2)要是上述分析正确,那么,接下来的orthographics to Normalize Device Coordinates变换是不是必须要做一下透视除法,把齐次分量w变为1,但我发现ortho矩阵仅仅是一个缩放和平移的操作并没有透视除法的体现(要是谁有见解请为我为我指出透视除法的体现或者说明下原因也行)。
      (3)还有就是,咱们作业中的代码有相关体现么,我觉得大多数人图像绘制有偏差,应该都是这里理解不够透彻。

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      • This topic was modified 1 year, 10 months ago by 狂草来书.
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