University of Warith Alanbiyaa College of Engineering AC
University of Warith Al-anbiyaa College of Engineering AC & Ref. Technologies Department First Class Orthographic Drawing Prepared by: Asst. lecture Karrar Al mansoori 1
Line of sight is an imaginary ray of light between an observer’s eye and an object. There are 2 types of LOS : parallel and converge Parallel projection Perspective projection Line of sight engineering 108. com
Plane of projection is an imaginary flat plane which the image is created. Parallel projection Perspective projection Plane of projection engineering 108. com
PROJECTION SYSTEMS 1. First angle system First Quadrant ﺍﻟﺰﺍﻭﻳﺔ ﺍﻟﺰﻭﺟﻴﺔ ﺍﻷﻮﻟﻰ - European country - ISO standard 2. Third angle system - Canada, USA, Japan, Thailand Third Quadrant ﺍﻟﺰﺍﻭﻳﺔ ﺍﻟﺰﻭﺟﻴﺔ ﺍﻟﺜﺎﻟﺜﺔ
ORTHOGRAPHIC PROJECTION 1 st angle system 3 rd angle system
ORTHOGRAPHIC VIEWS 1 st angle system 3 rd angle system
REVOLVE THE OBJECT Top view Front view Right side view
OBSERVER MOVE AROUND Top view Front view Right side view
THE GLASS BOX CONCEPT Rear view Left side view Bottom view
Depth History Width Height
b a c c
F. V
F. V
d a d b a b c a c
c b c a a b a d
T. V S. L F. V
T. V L. S. V F. V
Example
Example
Example
Front view Right side view Top view
EXAMPLE A Given Composition Rectangular prism Hole Front View
EXAMPLE B Given Composition Rectangular prism Cylinder Front View
EXAMPLE C Given Composition Cylinder with a blind hole. L-shaped with round end Hole
Example FOR T. V. ORTHOGRAPHIC PROJECTIONS FRONT VIEW FO R F. V. X R L. H. SIDE VIEW Y . FO 11 S. V TOP VIEW
Exercise
Exercise
- Slides: 37
