Perspective Practices

Plan-view method in one- point perspective (Continued) - 14276_280

Illustrator Draftsman 3 & 2 - Volume 2 Standard Practices and Theory
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Perspective Practices Introduction As ethereal as perspective drawing may seem, there are some standard practices that help you construct believable perspective drawings. Mechanical Two basic systems are used in the mechanical construction of accurate construction of perspective drawings: the plan-view method and the measuring-line method. perspective drawings Many illustrators use a combination of both systems when using mechanical means to produce drawings in perspective. Plan-view The plan-view method of constructing one-point perspective drawings method in one- requires that you have copies of orthographic projection drawings drawn to point scale. perspective To construct perspective drawings from a plan view, use this table: Step 1 Action Establish an arbitrary horizon line (HL) depending on the eye level you wish to portray (figure 5-15, view A). 2 Locate the picture plane (PP) so that it does not interfere with the drawing. Remember that the picture plane may be the same as the horizon line. 3 Draw the plan view. You may draw the plan view above or below the picture plane, but it is easier to draw it resting on top of the picture plane. 4 Draw the ground line (GL) in an arbitrary location below and parallel to the picture plane (figure 5-15, view B). 5 Locate the station point (SP) not less than twice the width of the object (obtained from the plan view) and directly in front of or to one side of the plan view. You may also place the SP two or three times the object’s greatest length from the nearest point of the plan view but if placed any closer, distortion of the perspective will result. 6 Project the width of the plan view to the ground line. Continued on next page 5-17

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