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Output Primitives and Geometric Transformations
You learnt how some basic geometric objects such as line segments, circles, ellipses and other curves are processed for plotting on a display unit. In most of the graphics packages you will find that polygons are also used as standard output primitives. Filled polygons with single solid color (or other alternatives for filling the interior) are provided as shape primitives.
Polygon representation methods - Boundary representations Boundary representations: now the 3-D object is shown as a set of surfaces which separate the object interior from
Linearly interpolate - Modeling and Rendering I 4 = I 1 + t (I 2 - I 1 ); here t = (|y 1 - y 2 |)/(|y 1 - y 2 |) I D = I A + t (I B - I A ); here t = (|AD|)/(|AB|)
crt is an analog or digital device
Automatic Data Capture There are numerous techniques available to collect data automatically without the need for manual entry. Manual entry is slower, more costly (need to emp
Constant intensity shading OR Flat shading In this technique particular intensity is calculated for each polygon surface that is all points that lie upon the surface of the
Interpolation of surface - Polygon Rendering Interpolation of surface normals beside the polygonedge between two vertices is demonstrated above in the figure 15. Here the norm
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
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Advantages of the Boundary Representation (i) This format gives efficient picture generation and easy access to other geometric information. (ii) The changes produced by mos
QUESTION While the design and printing of a job is of extreme importance, it is what happens to the job after it is printed that can really make it fantastic You have always
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