pictorial bertoline

8/3/2019 Pictorial Bertoline

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Pictorial Projections


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Pictorial Projections Pictorial sketches are a type of technical

illustration that shows several faces of anobject at once. Such sketches are used by anyindustry that designs, sells, manufacturesrepairs, installs or maintains a product.

Axonometric Isometric

Oblique Perspective


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Axonometric Projection Axonometric projection is a parallel

projection technique used to create

pictorial drawings of objects by rotatingthe object on an axis relative to aprojection plane to create a pictorialview.


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Axonometric Projection

Axonometric drawings are classified bythe angles between the lines comprising

the axonometric axes: Trimetric- all three angles are unequal. Dimetric - two of the three angles are equal.

Isometric - all three angles are equal.


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Isometric Axonometric

Projections

An isometric view of an object is created by rotating it 45degrees about a vertical axis, then tilted forward until thebody diagonal of the cube (A-B) appears as a point in thefront view. The angle the cube is titled forward is 35degrees 16 minutes.

The three corners meet to form equal angles of 120degrees and is called the isometric axis. All the edges ofthe cube are parallel to the edges that make up theisometric axis since projections of parallel lines are

parallel. Isometric lines Isometric planes


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Projections

Isometric axesposition

Regular Reversed Long axis

Nonisometric lines

Nonisometric planes


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Projections

Standards for hiddenline, center lines, anddimension.

Hidden lines areomitted.

Center line are drawnfor showing symmetry

or dimensioning.


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Projections

Dimensioned isometricdrawings used forproduction purposes

must be ANSIstandard, withdimension andextension lines andlines to be

dimensioned lying inthe same plane.


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Sketches

Sketches steps


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Sketches

Isometric Ellipses


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Sketches

Grid paper

Oblique planes

Angles Irregular curves

Section Views

Assembly


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Sketches


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Sketches


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Oblique Projections

Oblique drawings area form of pictorialdrawings in whichthe most descriptiveor natural front viewis placed parallel tothe plane ofprojection.


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Oblique Projections

Classifications.

Cavalier Cabinet General


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Oblique Projections

Sketching


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Perspective Projections

Perspective drawing techniques areused primarily because they come the

closest to representing objects andscenes as we would view them in thereal world. One of the most importantfeatures of perspective drawings is theconvergence of parallel edges as theyrecede from the viewer.


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Perspective


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Perspective


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Perspective

Terms

Horizon line Picture plane Vanishing point Ground line

Birds Eye View Humans Eye View

Grounds Eye View Worms Eye View


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Perspective

Classifications

1-point perspective 2-point perspective 3-point perspective

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