ANALYTICAL DRAWING
In the analytical process of drawing, we build on geometry.
If we are able to break down what we see into regular
geometric volumes or a geometric arrangement of parts.
we can more easily draw them. We can reorganize the forms
in an additive manner or transform them in a subtractive
manner. The resulting structure can then serve as a
framework for the development and refinement of the
forms and intervening spaces.
• The cube is aconvenient three-dimensional unit with
which to begin.
• Fromthe cube, we can use geometric principles to derive
other basic geometricvolumes, such as the pyramid.
cylinder. and cone. Mastery of drawing these simple
forms is a prerequisite for drawing a variety of derivative
compositions.
• We can extend a cube horizontally, vertically, as well as
intothe depth of adrawing. A number of cubic volu mes
or deriv
ative forms can link, extend. or grow into
centralized, linear. symmetrical, or clustered
compositions.
• Working from a cubic form we canselectively remove
,
or carve out portions to generate a new form. Inthis
subtractive process. we use the solid-void relationship
between form and space to guide us as we draw the
proportion and development of the parts.
In drawing complex forms, keep the following points in mind:
·----• Use cross-sectional contours to develop the form of
"
complicated shapes. These imaginary slices strengthen
t hedimensional effect of the drawn and show the volume
of the object.
-- ... Pay close attentionto overlapping forms and negative
spaces in the composition .
...---, - - - • Distinguish overlappingforms with linear accents.
~ Use scattered lines to indicate the transitional surfaces
of curved forms.
• Subordinate details to the overall form.
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192 / ARCHITECTURAL GRAPH ICS