SKETCHING A sketch is a rapidly executed freehand drawing that is not intended as a finished work....

SKETCHING

A sketch is a rapidly executed freehand drawing that is not intended as a finished work. In general, a sketch is a quick way to record an idea for later use. Artist's sketches primarily serve as a way to try out different ideas and establish a composition before undertaking a more finished work, especially when the finished work is expensive and time consuming. Sketching sharpens an artist's ability to focus on the most important elements of a subject and is a prescribed part of artistic development for students.

SKETCHES CAN HIGHLIGHT IMPORTANT INFORMATION

WE CAN USE SKETCHES TO TRANSFER INFORMATION TO A WORKSPACE…

UNDERSTANDING SKETCHING TECHNIQUES Analyzing complex objects

The ability to break down complex shapes into simpler geometric primitives is an essential skill for sketching and modeling objects

Basic curves and straight lines are the basis of many objects

UNDERSTANDING SKETCHING TECHNIQUES Essential shapes can be blocked in using

construction lines

UNDERSTANDING SKETCHING TECHNIQUES Contours show the contrast between positive

and negative space

VIEWPOINT

As you sketch, you should maintain a consistent viewpoint

Examine the shapes you see from that viewpoint

Sketch the object as it actually looks, not how you envision it is

SHADING

Adding shading to a sketch can give it a more realistic appearance Hatching lines and stippling are common forms of

shading

SHADING MAYBE USED FOR AESTHETIC APPEAL…

DRAWINGS AND SKETCHES

The following skills are important for sketches and drawings:AccuracySpeedLegibilityNeatness

FREEHAND SKETCHING

Freehand sketches are a helpful way to organize thoughts and record ideas

The degree of precision of a given sketch depends on its use

A freehand sketch should show attention to proportion, clarity, and correct line widths

MAINTAINING PROPORTIONS

Sketches are not usually made to a specific scale The most important rule in freehand sketching is to

keep the sketch in proportion Grid paper can help you maintain proportions

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ONE VIEW DRAWINGS

Frequently a single view supplemented by notes and dimensions can describe a simple object

PICTORIAL SKETCHING

A pictorial sketch represents a 3D object on a sheet of 2D paper by orienting the object so you can see its width, height, and depth in a single view

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PICTORIAL SKETCHING

The three common methods used to sketch pictorials are:Isometric sketchingOblique sketchingPerspective sketching

PERSPECTIVE SKETCHING

ISOMETRIC SKETCHES

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ISOMETRIC SKETCHES

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OBLIQUE SKETCHES

In oblique drawing, circles and angles parallel to the projection plane are true size and shape

Three things affect oblique sketches Which surface is parallel

to the projection plane The angle and

orientation for the receding lines depicting depth

The scale chosen for the receding lines

OBLIQUE SKETCHES

OBLIQUE SKETCHES

Forty-five degrees is often chosen for the angle of receding lines Thirty degrees is also a popular choice and can

look more realistic In cavalier projection, receding lines are

drawn at full scale In cabinet projection, the depth is

represented at half scale

REVIEW….

Sketches… Are quick, but legible… Help refine and develop ideas…(Allows designer

a greater sense of overall perception (how feature look and relate to one another)).

Are used to document important information to be developed later…

Can be used to show customers what the final product may look like…

Are less expensive to develop that permanent document during the early stages of manufacturing.

EXPECTATIONS:

Sketch pattern should fit that of the existing sketch in texture and weight

APPLIED DEPTH IN SKETCHING…