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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.
Hypertext: it is conceptually very similar as regular text: it can be stored, searched, read, or edited along with a significant difference: hypertext is text along with pointers
applications of visualization
What are the uses of homogeneous coordinates? Convert translation rotation and scaling in homogeneous coordinates. In mathematics homogeneous coordinates introduced by August
Resolution - Display Devices On a display device, the resolution means the maximum number of points that can be displayed simultaneously without an overlap in a row and number
Horizontal retrace - Display Devices In a refresh CRT monitor, the time it takes for an electron beam to return to the left most point on the next horizontal line after refresh
(a) Voltage or Electro-Magnetic Field Tablet and Pointer: This has a grid of wires, embedded in the tablet surface along with various voltages or magnetic fields consequent to va
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.
scan conversion of circle
Mathematical description of a Perspective Projection A perspective transformation is found by prescribing a center of projection and a viewing plane. Let here assume that P(x
What is Multimedia: People only remember 20 percent of what they see and 30 percent of what they hear. But they keep in mind 50 percent of what they see and hear and as much as 80
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