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THE GEORGE WASHINGTON UNIVERSITY
Department
of Computer Science
CS 6554 -
Computer Graphics II - Spring 2014
Assignment
1, Shading and Illumination Modeling
Yan Meng
Description:
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The implemented system reads-in geometric data of a polygon object and displays the object using perspective transformation with back faces removed. Back face culling is performed in the view space by calculating the dot product of each polygon’s line-of-sight and its surface normal; the polygon is visible if the product is negative. Viewing specification _including camera position, reference point, up vector, near clipping plane, far clipping plane, and height of the view frustum_ are built in the system and can be easily modified.
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Result comparison
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Viewing
Specification
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Perspective View Without Back Face Culling
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Perspective View With Back Face Culling
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Camera:
(2.2, 0.0, 2.0)
Reference:
(0, 0,
0)
Up:
(0, 1,
0)
d:
1.8
f:
50
fov:
60o
Number_of_Objects:
1
Object name:
house.d
scale:
(1, 1,
1)
translate:
(0, 0, 0)
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Camera:
(2.2, 0.0, 2.0)
Reference:
(0, 0,
0)
Up:
(0, 1,
0)
d:
1.8
f:
50
fov:
60o
Number_of_Objects:
1
Object name:
cow.d
scale:
(1, 1,
1)
translate:
(0, 0, 0)
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