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This renders a polygon surface by linearly interpolating intensity values across the surface. Intensity values for each polygon are matched with the values of adjacent polygon along the common edges, thus eliminating the intensity discontinuities that can occur in flat shading. Each polygon surface is rendered with Gourand shading by performing the following calculation: (i) Determine the average unit normal vector at each polygon vertex. (ii) Apply an illumination model to each vertex to calculate the vertex intensity. (iii) Linearly interpolate the vertex intensities over the surface of the polygon. At each polygon vertex we obtain a normal vector by averaging the surface normal of all polygons sharing that vertex. Thus for vertex position V, we obtain the unit vertex normal width the calculation. One we have the vertex normal's, we determine the intensity at the vertices from a lightning model. Incremental calculations are used to obtain successive edge intensity values between scan lines and to obtain successive intensities along a scan line.
Line Generation Algorithms - Graphic Primitives In previous section we have discussed the case of frame buffer, here information regarding the image to be projected upon the
Q. Why are all resolutions in ratio of 4:3? The bad news is that almost every monitor can only display upto a maximum of 262,144 colours (i.e. 18 bits/pixel Colour Depth). The
Geometric continuity - Properties of Bezier Curves Geometric continuity is the other process to join two successive curve sections. G 0 continuity is the similar as parametri
Derive the common transformation for parallel projection into a specified view plane, here the direction of projection d=aI+bJ+cK is along the normal N=n1I+n2J+n3K along with the r
A color histogram is a representation of the distribution of colors in an image. For digital images, a color histogram represents the number of pixels that have colors in each of a
Behavioral Animation - Computer Animation It used for control the motion of several objects automatically. Objects or "actors" are specified rules about how they respond to th
What are the different types of parallel projections? The parallel projections are basically divided into two types, depending on the relation among the direction of projectio
Build a program that allows: 1. using mouse or keyboard to move around on a set of 16 control points; 2. modify the value (drag along x, y, or z) of a point; 3. display
side-effect of scan-conversion
deffrent between vecgen algorithm and bresenham line algorithm in computer graphic
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