# L07_3 - Perspective Projection GE101 Engineering Graphics...

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Perspective Projection GE101 Engineering Graphics and Design

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Perspective Projection  Characteristics Center of projection (CP) is a finite distance from object Projectors are rays (i.e., non-parallel) Vanishing points Objects appear smaller as distance from CP (eye of  observer) increases Difficult to determine exact size and shape of object Most realistic, difficult to execute

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Perspective Sketch Horizon – observer’s eye level Ground Line – represents the plane on which the  object rests Vanishing point – position on horizon where  depth projectors converge
Perspective Sketch -  Foreshortening Perspective sketch of a cube For realism, foreshorten along receding axis

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Use of Diagonals
Partitioning

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Classes of Perspective Projection One-point perspective Two-point perspective Three-point perspective View from above Perspective views  are categorized  according to the  orientation of the  object with respect  to the projection  plane
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• Fall '05
• Leake
• projection  plane

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