The result is that the homogeneous presentation and its perspective transformation for the simplest figure—the point are enriched in computer drawing.
它丰富了目前计算机绘图中对最简单圆形——点的齐次表示及其透视变换。
2
In engineering drawing courses, the projection of point, line and surface is the basis of learning physical projection, which is often difficult for beginners to learn.
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