intro to ortho projection

7/25/2019 Intro to Ortho Projection

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Orthographic projections

Dr Ashish K Darpe

Department of Mechanical EngineeringIIT Delhi


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X

Y

HP IS ROTATED DOWNWARD 900

AND

BROUGHT IN THE PLANE OF FP.

PP IS ROTATED IN RIGHT SIDE 90

0

AND

BROUGHT IN THE PLANE OF FP.

X

Y

X Y

FP

HP

PP

FV

ACTUAL PATTERN OF PLANES & VIEWS

OF ORTHOGRAPHIC PROJECTIONS

DRAWN IN

FIRST ANGLE METHOD OF PROJECTIONS

LSV

TV

A) HP IS ROTATED 900DOUNWARD

B) PP, 900IN RIGHT SIDE DIRECTION.

THIS WAY BOTH PLANES ARE BROUGHT IN THE SAME PLANE CONTAINING FP.

PATTERN OF PLANES & VIEWS (First Angle Method)

Horizontal Plane (Top Plane)

Frontal Plane (Vertical Plane)

FP

HP

PP

ORTHOGRAPHIC PROJECTIO


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FOR T.V.

P.P. F.P.

V

S.V.

O B E

! T

IN THIS METHOD,THE OBJECT IS ASSUMED TO BE

SITUATED IN THIRD QUADRANT( BELOW HP & BEHIND OF FP. )

LANES BEING TRANSPERENTAND INBETWEEN

OBSERVER & OBJECT.

ACTUAL PATTERN OFPLANES & VIEWS

OFTHIRD ANGLE PROJECTIONS

X Y

TV

T"IR# AN$LE

PROE!TION

LSV FV


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intro to ortho projection

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