# Projection of lines

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Published on March 15, 2014

Source: slideshare.net

ASSIGNMENT (to be submitted on 22nd Oct 2010, Friday) 1. Page 2 – Problem 4 (pentagon) – TYPE 1a 2. Page 2 – Problem 5 (square) – TYPE 1a 3. Page 3 – Problem 7 (rectangle) – TYPE 2a (find angle of inclination with V.P.) 4. University questions – No. 7 (circle) – TYPE 1b2 (find angle of inclination with H.P.) 5. University questions – No. 9 (hexagon) – TYPE 2a

PROJECTION OF LINES Engineering Graphics I Year - CSE

Line parallel to HP and VP True length VP HP Distance above HP Distance in front of VP a’ b1’ b1 a True length

Locus of a’ Locus of a True length Top view length VP HP Distance above HP Distance in front of VP True inclination with HP a’ b1’ b1 a Line inclined to HP and parallel to VP

Locus of a’ Locus of a Truelength VP HP Distance above HP Distance in front of VP True inclination with HP a’ b1’ a Line perpendicular to HP , b1

Locus of a’ Locus of a VP HP Distance above HP Distance in front of VP a’ True length True inclination with VP b1 a Front view length b1’ Line inclined to VP and parallel to HP

TYPE - I Locus of one end point True length True inclinations with VP and HP Line inclined to both VP and HP

Apparent inclination with HP Locus of a’ Locus of b’ Locus of a Locus of b True length True length Front view length VP HP Distance above HP Apparent inclination with VP True inclination with VP True inclination with HP a’ b1’ b1 aDistance in front of VP Top view length Frontview length b2’ Topviewlength b2 Distance between end projectors

TYPE - II Locus of two end points True length Line inclined to both VP and HP

Apparent inclination with HP Locus of a’ Locus of b’ Locus of a Locus of b True length True length Front view length VP HP Apparent inclination with VP True inclination with VP a’ b1’ b1 a Top view length Frontview length b2’ Topviewlength b2 Distance between end projectors Distances above HP Distances in front of VP True inclination with HP

Apparent inclination with HP Locus of b’ Locus of a’ Locus of a Locus of b True length True length Front view length VP HP Apparent inclination with VP True inclination with VP a’ b1’ b1 a Top view length Frontview lengthTopviewlength b2 Distance between end projectors Distances above HP Distances in front of VP True inclination with HP b2’

TYPE - III True length Top and front view of ONE end point Top/front view of OTHER end point Length of Top/front view Line inclined to both VP and HP

Apparent inclination with HP Locus of a’ Locus of b’ Locus of b Locus of a True length True length Front view length VP HP Apparent inclination with VP True inclination with VP a’ b1’ b1 a Top view length Frontview length b2’ Topviewlength b2 Distance between end projectors Distance above HP Distances in front of VP True inclination with HP

TYPE - IV True length Top and front view of ONE end point Length of top AND front views Line inclined to both VP and HP

Apparent inclination with HP Locus of a’ Locus of b’ Locus of a Locus of b True length Front view length VP HP Distance above HP Apparent inclination with VP True inclination with VP True inclination with HP a’ b1’ b1 aDistance in front of VP Top view length Frontview length b2’ Topviewlength b2 Distance between end projectors True length

TYPE - V Distance between end projectors Line inclined to both VP and HP

Apparent inclination with HP Locus of a’ Locus of b’ Locus of a Locus of b True length Front view length VP HP Distances above HP Apparent inclination with VP True inclination with VP True inclination with HP a’ b1’ b1 aDistance in front of VP Top view length Frontview length b2’ Topviewlength b2 Distance between end projectors True length

TYPE - VI One end point in H.P. and the other in V.P. Line inclined to both VP and HP

Apparent inclination with HP Locus of b’ Locus of a True length True length Front view length VP HP Apparent inclination with VP True inclination with VP a1 Top view length Frontview length b2’ Topviewlength True inclination with HP a2 b1’ Locus of a’ Locus of b

Locus of a’ Locus of b’ Locus of b Locus of a VP HPa1’ Frontview length b2’ Topviewlength a2 b Distance between end projectors

TYPE - VII Mid-point problem Line inclined to both VP and HP

Apparent inclination with HP Locus of a’ Locus of b’ Locus of a Locus of b TL/2 Front view length VP HP Distance above HP Apparent inclination with VP True inclination with VP True inclination with HP a1’ b1’ b1 a1 Distance in front of VP Top view length Frontview length b2’ Topviewlength b2 Locus of m’ Locus of m TL/2 TL/2 TL/2 a2 m m’ a2’ Distance between end projectors

THE END

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