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For orthographic parallel projection:
glOrtho(left, right, bottom, top, near, far);
glOrtho2D(left, right, bottom, top);
Here left, right define the x-direction extents, bottom, top define y-direction extents and near, far define the z-direction extents of the view volume. gluOrtho2D is exactly like glOrtho, but with near = -1 and far = 1. That is, gluOrtho2D views points that have z-value between -1 and 1. Usually, gluOrtho2D is used when drawing two-dimensional figures that lie in the xy-plane, with z = 0.
Write short notes on active and passive transformations? In the active transformation the points x and x represent different coordinates of the similar coordinate system. Here
Presentation Graphics The instant you are going to represent yourself or your product or company or research paper and so on. Only standing and speaking is fairly ineffective.
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What is orthographic parallel projection? When the direction of the projection is normal (perpendicular) to the view plane then the projection is called as orthographic paral
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