Construction of real and imaginary shadows of points A and B on the model and plot

A drawing of any structure consists of segments of straight or curved lines, which together can represent various geometric shapes. To construct shadows from a straight line, it is enough to construct a shadow from the points that limit the line segment. For curved lines, several intermediate points are taken and their connections are used to obtain a shadow from the line. The shadow from a point on any surface (Fig. 2) is the point of intersection with this surface of a ray of light drawn through this point. From a point located in space, a shadow can fall either on the area π1 or π2 .

Fig. 2 shows the construction of the shadow of points A and B on the diagram.

Of the two shadows A^T and Aу ^T, В ^Т and ВУ^Т , the first A^T , В^Т will be real, actual, the second АУ^Т , ВУ ^Т - imaginary

Fig. 2. Shadow of a point

Construction of real and imaginary shadows of points A and B on the model.

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step 5

Construction of real and imaginary shadows of points A and B on the diagram.