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Ray Tracing: Ray t racing is the technique to determine which objects in the scene are visible. In this to identify the visible surface for each pixel we continue to bounce the ray around the scene and collecting intensity contributions. This provides a simple and powerful rendering technique for obtaining global reflection and transmission effects. The basic ray tracing algorithm also provides for visible surface detection shadow effects transparency and multiple light source illumination. For each scan line the intensity at the interaction of the scan line with a polygon edge is linearly interpolated from the intensities at the edge end points. For example the polygon edge with end point vertices at position 1 & 2 is intersected by the scan line at point 4. A fast method for obtaining the intensity at point 4 is to interpolate lower intensities I1 & I2 using only the vertical displacement of the scan line.
Define B-Spline curve? A B-Spline curve is a set of piecewise (usually cubic) polynomial segments that pass close to a set of control points. Though the curve does not pass by
Basic Approaches for Visible Surface Determination There are two basic approaches for visible-surface determination, as per if they deal along with their projected images or a
Performing rotation about an Axis For performing rotation about an axis parallel to one of the coordinate axes (say z-axis), you first need to translate the axis (and hence the
QUESTION (a) What are the main purposes of using master pages? (b) How do you select a master page item on a document page? (c) How do you resize a graphics frame and its
Liang Barsky line clipping algorithm : The algorithm uses parametric form of the line segment. Four inequalities are created using the parametric form of the line segments. Th
scan conversion of circle
Design and functioning of a refresh cathode ray tube Primary components of refresh cathode ray tube are (i) electron gun used in producing electron beam (ii) heating fila
cathode ray tube is an analog or digital device
Image Capture Formats: Video cameras appear in two various image capture formats: progressive and interlaced scan. Interlaced Scan It is a technique of enhancing the
Parallel Projection - viewing transformation Parallel projection methods are utilized by engineers to make working drawings of an object that preserves its true shape. In t
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