Lesson 09 – Perspective of points in given positions on a line perpendicular to the picture plane

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To set points on a line perpendicular to the picture plane we can use co-planar straight lines that form an angle of 45° with the picture plane.

These straight lines m intersect the straight line r that is perpendicular to the picture plane and the trace 1 of the plane to which it belongs, identifying equal segments. The perspectives m’ have their vanishing point I’m on the distance circle and on the vanishing line i’π1 of the plane to which they belong.

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