Orthographic Projection of Object Features OBJECT FEATURES Edges

Orthographic Projection of Object Features

OBJECT FEATURES Edges are lines that represent the boundary between two faces. Corners Represent the intersection of two or more edges. Edge Corner Edge No corner No edge No corner

OBJECT FEATURES Surfaces areas that are bounded by edges or limiting element. Limiting element is a line that represents the last visible part of the curve surface. Surface Limit

PROJECTION OF POINT(S) BT BT AT AT Equal distance B A AF BF BR AR AF BF AR BR

PROJECTION OF LINE True length BT AT BT Equal length AT B A AF BF Point BR AR AF BF AR BR True length NORMAL LINE

PROJECTION OF LINE True length BT AT BT Equal length AT B A A AF BF Foreshortened BR AR AF Foreshortened BF AR BR INCLINED LINE

PROJECTION OF LINE Foreshortened BT AT BT B BR BF AT B A AF Equal length BF BR A AR Foreshortened AF AR Foreshortened OBLIQUED LINE

PROJECTION OF PLANE True size CT BT CT AT BT C B CR A BF AF, CF Edge AT Equal length BF AR, BR AF, CF AR, BR CR Edge NORMAL PLANE

PROJECTION OF PLANE Foreshortened CT BT CT AT C CR CF BT AT Equal length C B CF CR A BF AF Foreshortened AR, BR Edge BF AF AR, BR INCLINED PLANE

PROJECTION OF PLANE Foreshortened CT BT CT AT C Equal length B BF CR CF BT AT C B CF BR BF A AF Foreshortened BR CR AR Foreshortened AF AR OBLIQUED PLANE

PROJECTION OF OBJECT The views are obtained by projecting all object features to the picture plane. You have to project the remaining surfaces which are Invisible !

PROJECTION OF OBJECT s s s

PROJECTION OF OBJECT