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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.
Draw a long line segment using (i) DDA line drawing algorithm (ii) Bresenham line drawing algorithm (iii) OpenGL function using GL_LINES. Observe if DDA line segment deflects from
Obtain an MRI image using the Open Source internet resources. i. Read the image into Scilab ii. Plot the image iii. Covert it into grayscale image and plot it iv. Find/
y-shear about the origin - 2-d and 3-d transformations Suppose an object point P(x,y) be moved to P'(x',y') in the x-direction, through the specified scale parameter 'b'. that
Types of Formats It is significant to distinguish among a file format and a codec. Although most audio file formats support merely one audio codec, a file format may assist mul
List out the merits and demerits of DVST? The merits and demerits of direct view storage tubes [DVST] are as follows It has a flat screen Refreshing of screen is
types of attributes
Q. Write a short note on area subdivision method for hidden surface removal. Ans. Area Subdivision This technique for hidden- surface removal is essentially an image- spac
Define clipping and covering (exterior clipping)? Clipping is the process of cutting a graphics display to neatly fit a predefined graphics region or the view port. This is
What is meant by Addressability? Ans. Addressability is the number of individual dots per inch (d.p.i.) that can be formed. If the address of the current dot is (x, y) then the
To transform from the world coordinate system to viewing coordinate system you need to perform the following operations. a) Translate the viewing coordinate origin to the worl
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