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Cases of clip a line segment-pq
Case 1: As we determine a new value of tE that is value of parameter t for any potentially entering (PE) point we select tmax as: tmax = max {tmax, tE}. The initial value of tmax = 0 is considered.
Case 2: As we find a new value of tL that is value of parameter t for any potentially leaving (PL) point then tmax value is updated by tmin = min {tmin, tL}. The initial value of tmin = 1 is considered.
At last when value of t for all edges are determined and if tmax < tmin then line is visible else not. As well as line is visible from
P + tmax (Q - P) to P + tmin (Q - P) that is
P + t (Q - P) hence tmax ≤ t ≤ tmin
tmax < tmin (draw line)
tmax < tmin (reject line)
Important points about the illumination Model An illumination model is also termed as lighting model and sometimes considered to as shading model, that is utilized to compute
ppt
Uniform B - spline curve: When the spacing between Knot values is constant, the resulting curve is called a uniform B- spline. Blending function for B- spline curves are defined b
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applications of visualization
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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
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