Isometric Projections - 1

Isometric Projections - 1Pictorial DrawingsThree methods to draw pictorial drawings:Perspective projectionOblique projectionAxonometric projection2Projection methods3

Perspective projectionused by the artists, professional designers and architectsshow the views as it appears to the human eyeit appears to converge at a point, called vanishing point4Perspective view5

Oblique projectionused by the mathematicians and furniture manufacturersThey impart third dimension at an angle to the two dimensional images, to show the depth6

Axonometric ProjectionTypes of axonometric drawingabc2. DimetricTwo angles are equal.bac3. TrimetricNone of angles are equal.abc1. IsometricAll angles are equal.ABCDABCDAxonometric axisAxonometric axisAxonometric axis78Axonometric Projection

Isometric projectionall the angles between principal axes are equalit needs a single scale to measure along each of the three axesvertical lines are drawn verticalhorizontal lines are drawn inclined 30 to the base9

Isometric ProjectionRotate 45about vertical axisTilt forward (35o16)All edges foreshortenabout 0.8 time.An isometric projection is a true representation of the isometric view of an object.10