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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.
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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
Question 1) Why are selection tools useful? Describe them based on different categories Question 2) What are the different types of layers? Describe each type Quest
Introduction of Curves and Surfaces This section has covered the methods of generating polygons, closed and curves surfaces. Under those methods we have discussed different ty
Define Octrees? Hierarchical tree structures called octrees, are used to show solid objects in some graphics systems. Medical imaging and other applications that needs display
Disadvantages with the Boundary Representation (i) It requires more storage than the corresponding half-space method. (ii) There is no guarantee that the object created is v
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Types of Refresh Monitors - Raster Scan and Random Scan There are two types of refresh monitors, i.e. the Raster Scan and Random Scan that will be illustrated separately.
Mathematical description of an Oblique projection onto xy-plane In order to expand the transformation for the oblique projection, identify the Figure. This figure explains a
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