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comparison dandy/resources/sankaku.js @ 1:54589bb5e57d

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add dandy
author Nobuyasu Oshiro <dimolto@cr.ie.u-ryukyu.ac.jp>
date Thu, 23 Feb 2012 14:51:33 +0900
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0:718974a1a32b 1:54589bb5e57d
1 mycos = [];
2 mysin = [];
3 const SANKAKU = 100000;
4 const pi2 = Math.PI * 2.0;
5
6
7 function sankakuf()
8 {
9 for(var i=0; i < 180; i++){
10 mysin[i] = Math.sin(i / 360.0 * pi2) * SANKAKU;
11 }
12 for(i=0; i < 180; i++) {
13 mycos[i] = Math.cos(i / 360.0 * pi2) * SANKAKU;
14 }
15 }
16
17 function Mycos(c)
18 {
19 c = parseInt(c);
20 c %= 360;
21 if(c < 0)
22 c += 360;
23 if((c <= 180))
24 return (mycos[c]);
25 if(c > 180)
26 return (mycos[180 - (c - 180)]);
27 return 0;
28 }
29
30 function Mysin(c)
31 {
32 c = parseInt(c);
33 if(c < 1) c += 1;
34 c %= 360;
35 if( c < 0)
36 c += 360;
37 if(c <= 180)
38 return (mysin[c]);
39 if(c > 180)
40 return (mysin[180 - (c - 180)] * -1);
41 return 0;
42 }