喺斜投影圖做法當中(簡化講),分析者要由嚿物體度射一拃彼此之間成平行嘅直線(平行投影),而呢啲直線冚唪唥都唔同投影表面正交(睇下圖 oblique)。
![Thumb](http://upload.wikimedia.org/wikipedia/commons/thumb/4/4b/Various_projections_of_cube_above_plane.svg/320px-Various_projections_of_cube_above_plane.svg.png)
睇埋
參考資料
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