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Basic Ray Tracing Algorithm - Polygon Rendering
The Hidden-surface removal is the most complete and most versatile method for display of objects in a realistic fashion. The concept is simply to take one ray at a time, emanating from the viewer's eye (in perspective projection) or from the bundle of parallel lines of sight (in parallel projection) and reaching out to each and every pixel in the viewport, using the laws of optics.
Generally, to avoid wastage of effort by rays starting from sources of light going out of the viewport, the reverse procedure of starting with ray from the viewpoint and traveling to each pixel in the viewport is adopted. If the ray encounters one or more objects, the algorithm filters out all but the nearest object, or when there is an overlap or a hole, the nearest visible portion of all the objects along the line of sight.
Cohen Sutherland line clipping algorithm The algorithm uses the following main steps Divide the entire plane into nine disjoint regions using the four window boundaries
Find the normalization transformation N, which uses the rectangle W(1, 1); X(5, 3); Y(4, 5) and Z(0, 3) as a window and the normalized deice screen as viewpoint.
Find out the matrix of projection for cavalier projection Answer: Cavalier projection corresponds to tan α = 1, leading to the following matrix.
Illustration of a Clipping window ABCD is placed as follows: A (100, 10), B (160, 10, C (160, 40), D (100, 40) By using Sutherland-Cohen clipping algorithm determine the vis
What is an axonometric orthographic projection and cabinet projection? The orthographic projection can show more than one face of an object. Such an orthographic projection i
What is scaling and shearing? The scaling transformations alters the shape of an object and can be carried out by multiplying every vertex (x,y) by scaling factor Sx, Sy where
Acquire a transformation matrix for perspective projection for a specified object projected onto x=3 plane as viewed by (5,0,0). Solution: Plane of projection: x = 3 as given.
Enumerate the use of Data goggles- Virtual Reality Data goggles/helmets - These use optical systems and display screens which send 3D images to the eyes. Motion sensors mea
Question 1 Explain the fundamental steps in digital image processing 2 Explain the terms reflection, complement and Translation with example diagrams 3 Explain about Imag
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