PERSPECTIVE VARIABLES
Distance of the Station Point to the Object
T distance of the station point (SP) to an object
he
influences the rate of foreshortening of the object's
surfaces that occurs in the perspectivedrawing.
• As the observer's SP moves farther away from
the object. the vanishing points for the object
movefarther apart, horizontal lines flatten
out, and perspective depth is compressed.
96 / ARCHITECTURAL GRAPHICS
• As the observer's SP moves forward,
the vanishing points for the object
move closer together, horizontal
angles become moreacute, and
perspective depth is exaggerated.
• In t heory, a perspective drawing
presen a true picture of an object only
ts
whenthe eye of the viewer is located at
t heassumed station point (SP) of t he
p
erspective.