Maurice Tutor

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    Argosy University/ Phoniex University/
    Nov-2005 - Oct-2011

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    Phoniex University
    Oct-2001 - Nov-2016

Category > Computer Science Posted 14 Sep 2017 My Price 8.00

non- crossed polygon

(Geometry: non-cross polygon) Write a program that enables the user to add/ remove points by clicking the left/right mouse button, and displays a non- crossed polygon that links all the points, as shown in Figure 22.11a. A polygon is crossed if two or more sides intersect, as shown in Figure 22.11b. Use the following algorithm to construct a polygon from a set of points.

 

 

 

    

(a)                                                                                  (b) Crossed polygon

 

FIGURE 22.11 (a) Programming Exercise22.15 displays a non-crossed polygon for a set of points. (b) Two or more sides intersect in a crossed polygon.

 

 

Step 1: Given a set of points S, select the rightmost lowest point p0 in the set S.

Step 2: Sort the points in S angularly along the x-axis with p0 as the center. If there is a tie and two points have the same angle, the one that is closer to p0 is considered greater. The points in S are now sorted as p0, p1, p2, ...,

pn-1.

Step 3: The sorted points form a non-cross polygon.

Answers

Maurice Tutor
(5)
Status NEW Posted 14 Sep 2017 01:09 PM My Price 8.00

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