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TWEET # Untitled a guest Oct 22nd, 2019 72 Never
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1. #include <graphics.h>
2. #include <cmath>
3.
4. #define N 3
5. #define PI 3.1415
6.
7.
8. void poli(float valx,int points[],int n)
9. {
10. int i;
11.  int xc=0, yc=0;
12.     for(int i=0;i<5;i++){
13.             xc += points[2*i];
14.             yc += points[2*i+1];
15.     }
16.     xc/=5;yc/=5;
17.
18.       double cosa = cos(PI/4), sina = sin(PI/4);
19.     for(int i=0;i<n;i++){
20.             double xi,yi;
21.             xi = points[2*i];
22.             yi = points[2*i+1];
23.             points[2*i]   = xc + (xi-xc)*cosa - (yi-yc)*sina;
24.             points[2*i+1] = yc + (xi-xc)*sina + (yi-yc)*cosa;
25.     }
26.
27.
28. }
29. void translatie(int valx,int valy,int points[],int n)
30. {
31.     int i;    for(i=0;i<5*2;i++)
32. {points[2*i]=points[2*i]+valx*100;
33. points[2*i+1]=points[2*i+1]+valy*100;
34.
35. }
36.       for(int i=0;i<2*n;i++)
37.     setcolor(YELLOW);
38.     drawpoly(5,points);
39.
40. }
41.
42.
43. int main()
44. {int n=5;
45.     initwindow(800,600);        // open a 400x300 graphics window
46.
47.     int points[]={200,200,300,200,300,300,200,300,200,200},v;
48.     drawpoly(n,points);
49. int i;
50. int pct=n*2;
51. float valx=2;
52. float valy=2;
53.
54.
55. poli(valx,points,n);
56. translatie(valx,valy,points,n);
57. valy=0-valy;
58. translatie(valx,valy,points,n);
59. valx=0-valx;
60. translatie(valx,valy,points,n);
61.
62.     while(!kbhit());           // wait for user to press a key
63.
64.     closegraph();              // close graphics window
65.     return 0;
66. }
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