Sketching
3 TYPES SKETCHES
• Rough Sketches
• Refined Sketches
• Detailed Sketches
ROUGH SKETCHING
• Most common recording method.
• “Rough” is the state of the design
ideas.
• Designs are incomplete and
REFINED SKETCHING
• Are refined about the design ideas.
• May be completely different from
the original rough sketches.
unrefined.
DETAILED SKETCHES
DETAILED SKETCHING
• Shape
Detailed Sketches gives and
• Size
communicates the information
• Details
• Dimensions
• Material
EXCEL: -ACT-REFLECT-CORRECT-REPEAT-
needed to BUILD:
 Products
(TV, Phone, etc.)
 Structures (Road, Buildings, etc.)
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Sketching
Pictorial Sketches-3 Types
Shows Artifacts:
• In a single view
• As our eye would see them.
• Front, Sides & Top of Objects.
OBLIQUE SKETCHES
The easiest pictorial sketches to produce.
• Show the front view as if you were
looking straight at it.
• Sides extend back from the front view.
• Sides shown with parallel lines that are
Oblique Sketches
Perspective Sketches
generally drawn at 45° to the front view.
Isometric Sketches
OBLIQUE SKETCHES
Two types of Oblique Sketches:
• Cavalier oblique
• Cabinet oblique
CAVALIER OBLIQUE
Cause the sides
and top to look
deeper than they
are.
From: http://www.tpub.com/content/draftsman/14276/img/14276_307_1.jpg
CABINET OBLIQUE
Steps on How to Sketch
an Oblique Block
Shorten the lines
that project back
from the front to
one-half their
original length.
From: http://www.tpub.com/content/draftsman/14276/img/14276_308_1.jpg
http://www.tpub.com/content/engineering/14069/css/14069_187.htm
EXCEL: -ACT-REFLECT-CORRECT-REPEAT-
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Sketching
ISOMETRIC SKETCHES
ISOMETRIC SKETCHES
• Isometric means equal measure.
• Object are viewed from one corner.
• Angles formed by the
lines at the top middle
corner are equal to 120°.
http://www.tpub.com/engbas/5-31.htm
Steps on How to Sketch
An Isometric Block
PERSPECTIVE SKETCHES
Show how the human eye or
camera would see an object.
Most realistic, yet, most difficult
of the three sketches.
Realism is obtained by having
parallel lines meet at a distant
vantage point.
http://www.tpub.com/content/engineering/14069/css/14069_187.htm
TYPES OF PERSPECTIVE VIEWS
Three major types:
ONE POINT PERSPECTIVE VIEW
Shows objects
as if you were directly in front of it.
one-point
two-point
three-point
FROM: http://www.ider.herts.ac.uk/school/courseware/graphics/one_point_perspective.html
EXCEL: -ACT-REFLECT-CORRECT-REPEAT-
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Sketching
TWO POINT PERSPECTIVE VIEW
Shows how an object would appear
if you stood at one corner.
THREE POINT PERSPECTIVE VIEW
Shows how the eye sees objects.
• Width
• Depth
• Height
https://youngartofnoble.wordpress.com/
From: https://perspectivethai.files.wordpress.com/2013/03/perspective.jpg
GLOSSARY
Rough sketches
Incomplete and unrefined design ideas.
GLOSSARY 2
Oblique sketches
Refined sketches
Refined design sketches.
Detailed sketches
Communicate size, in addition to the
shape and proportion communicated in
Isometric sketches
the rough and refined sketches.
GLOSSARY 3
Perspective sketches
realistic sketches that have parallel lines that
meet at a distant vantage point.
One-point perspective
shows an object as if you were directly in
front of it.
EXCEL: -ACT-REFLECT-CORRECT-REPEAT-
Shows the front view as if you were looking
straight at it, and the sides extend back
from the front. Parallel lines drawn to 45
degrees to the front view.
Shows object as if viewed from one corner.
Angle measures in upper right corner are
equal to 120 degrees.
GLOSSARY 4
Two-point perspective
Shows how an object would appear if you
stood at one corner.
Three-point perspective
Shows how the eye sees the length, width
and height of an object.
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