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Projection

The document discusses various types of 3D graphics projections, including parallel, orthographic, oblique, isometric, and perspective projections. It highlights the differences between these methods, such as the realism and measurement accuracy they provide. Additionally, it outlines the characteristics of each projection type, including the angles used in oblique projections and the varying complexity of perspective projections.

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8 views8 pages

Projection

The document discusses various types of 3D graphics projections, including parallel, orthographic, oblique, isometric, and perspective projections. It highlights the differences between these methods, such as the realism and measurement accuracy they provide. Additionally, it outlines the characteristics of each projection type, including the angles used in oblique projections and the varying complexity of perspective projections.

Uploaded by

Pdf Web
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PPTX, PDF, TXT or read online on Scribd
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PROJECTION

-NIRZARI UPASANI
3D GRAPHICS

 In the 2D system, we use only two coordinates X and Y but in 3D,


an extra coordinate Z is added
Parallel Projection

 In parallel projection, we specify a direction of projection instead


of center of projection.
 less realistic, but they are good for exact measurements
 parallel lines remain parallel and angles are not preserved.
1. Orthographic Projection
2. Oblique Projection

 we can view the object better than orthographic projection

 Cavalier projection - makes 45˚ angle with the projection


plane.
 Cabinet projection - makes 63.4˚ angle with the projection
plane
Isometric Projections

 Orthographic projections that show more than one side of an


object are called axonometric orthographic projections.
 The most common axonometric projection is an isometric
projection where the projection plane intersects each
coordinate axis in the model coordinate system at an equal
distance.
Perspective Projection

 the distance from the center of projection to project plane is


finite and the size of the object varies inversely with distance
which looks more realistic.
 3 types of perspective projections:
 One point perspective projection is simple to draw.
 Two point perspective projection gives better impression of depth.
 Three point perspective projection is most difficult to draw.

 EXAMPLE..\1,2,3 point perspective.mp4

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