theory of projection
DESCRIPTION
A basic introductory class to Theory of Projection with a specific focus on Anna University first year students handling Engineering GraphicsTRANSCRIPT
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THEORY OF
PROJECTION
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WHO HAS THE EYE?
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SOMETHING MAJESTIC
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SOMETHING MESMERISING
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SOMETHING SURPRISING
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SOMETHING SHOCKING
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SOMETHING TRANQUILLING
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SOMETHING TERRIFYING
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SOMETHING ELSE
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SOMETHING ELSE
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SOMETHING ELSE
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SOMETHING ELSE
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SOMETHING ELSE
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UNDERSTANDING OBJECT & IMAGE
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UNDERSTANDING OBJECT & IMAGE
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DIFFERENCE BTW OBJECT AND IMAGE
PARAMETER OBJECT IMAGEINFORMATION MULTI SINGLE
VIEWPOINT CHANGED CANNOT CHANGE
CHANGE WITH TIME
YES NO
DIMENSIONS 3D 2D
OWNERSHIP NO YES
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SIZE DOES MATTER
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DIFFERENTIATE
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DIFFERENTIATE
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DIFFERENTIATE
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THE 2D – 3D PROBLEM
2D – Engineers3D - Customers
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THE 2D – 3D PROBLEM
2D – Engineers3D - Customers
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THE 2D – 3D PROBLEM
2D – Engineers3D - Customers
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THE 2D – 3D PROBLEM
2D – Engineers3D - Customers
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THE 2D – 3D PROBLEM
2D – Engineers3D - Customers
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EXPLAINING PROJECTION
OBJECT IMAGE
PROJECTION
OBSERVER
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EXPLAINING PROJECTION
PROJECTION
IS THE PROCESS OF OBTAINING
_______ __________________________
FROM
_______ __________________________
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Common Elements of a Projection System
• Center /Direction of Projection/Station Point/Observers Eye
• Projection Plane/Picture Plane
• Object(s) to be projected
• Projectors/Visual Rays/Lines of Sight
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Classification of Projection
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TYPES OF PROJECTION
STATION POINTOBJECTPLANE OF PROJECTIONPROJECTORS
TYPE DISTANCE BTW SP & PP PROJECTORS
PERSPECTIVE FINITE RADIATING FROM STATION POINT & INCLINED TO PROJECTION PLANE
PARALLEL INFINITE PARALLEL TO EACH OTHER & PERPENDICULAR TO THE PLANE OF PROJECTION
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TYPES OF PROJECTION
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TYPES OF PROJECTION
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WHAT PROJECTION IS THIS?
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ISOMETRIC & ORTHOGRAPHIC PROJECTION
ORTHOGRAPHIC ISOMETRICMULTI VIEW SINGLE VIEWSHOWS THE OBJECT AS 3 DIFFERENT IMAGES AS VIEWED FROM FRONT,TOP & BACK
SHOWS THE OBJECT AS ONE IMAGE WITH ALL THREE SIDES WITH ALL AXIS EQUALLY INCLINED
CAN SHOW 2DIMENSIONS ONLY CAN SHOW 3DIMENSIONS ONLY
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WHAT SHALL WE DO?
ISOMETRIC TO ORTHOGRAPHIC
ORTHOGRAPHIC TO ISOMETRIC
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PRACTICE ISO TO ORTHO #1 FRONT VIEW
SIDE VIEW
TOP VIEW
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PRACTICE ISO TO ORTHO #2
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PRACTICE ISO TO ORTHO #3