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lec3 - Projection transformations Computer Graphics Lecture...

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Unformatted text preview: Projection transformations Computer Graphics Lecture 3 Introduction The basic problem is to map a 3D object to a 2D Display surface. Projections Projection Taxonomy • Planar projections – Parallel • Orthographic – Top, Front, Side – Axonometric (isometric, dimetric, trimetric) • Oblique – Cabinet – Cavalier – Perspective • One, two or three point Parallel projections • When the center of projection is a point at infinity. – Orthographic projection The projection lines are orthogonal to the projection plane. – Oblique Projection The projection line is NOT orthogonal to the projection plane Orthographic projection Six and 3 views (top, front, side)                                  1 1 , 1 1 , 1 1 z y x T T T Axonometric Projections A City of Cathay Axonometric projections (cont)                      ...
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lec3 - Projection transformations Computer Graphics Lecture...

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