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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.
Rotation about the origin - 2-d and 3-d transformations Specified a 2-D point P(x,y), which we need to rotate, along with respect to the origin O. The vector OP has a length '
Define Random Scan/Raster Scan displays. Ans. Random scan is a process in which the display is made by the electronic beam, which is directed, only to the points or division of
What is the use of Projection reference point? In Perspective projection, the object positions are transformed to the view plane with these converged projection line and the p
What are the advantages of rendering polygons by scan line method? i. The max and min values of the scan were simply found. ii. The intersection of scan lines with edges i
when dda algorithm is more efficient than bresenhem line drawing algorithm
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
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
Question 1: (a) Provide a clear explanation of what is ‘rigging' and its use? (b) What are the basic differences of Forward Kinematics (FK) and Inverse Kinematics (IK)? Wh
Reflection and Shear There are a few important transformations which are not primitive in the sense that they can be expressed as compositions of translation, rotation and scal
What are the utilizations of Inverse transformation? Provide the Inverse transformation for translation, shearing, reflection, scaling and rotation. Solution: We have observed
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