forked from extern/egroupware
86 lines
2.2 KiB
JavaScript
86 lines
2.2 KiB
JavaScript
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/*
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DynAPI Distribution
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dynapi.functions.Math extension
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Math and Path functions
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*/
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var f = dynapi.functions;
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f.Math = {}; // used by dynapi.library
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// Math Functions --------------------------
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f.radianToDegree = function(radian) {
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return radian*180/Math.PI;
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};
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f.degreeToRadian = function(degree) {
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return degree*Math.PI/180;
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};
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f.sintable = function(lsin) {
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for (var i=0; i<361; i+=1) lsin[i]=Math.sin((i/180)*Math.PI);
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};
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f.costable = function(lcos) {
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for (var i=0; i<361; i+=1) lcos[i]=Math.cos((i/180)*Math.PI);
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};
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f.getRandomNumber = function(n) {
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var t=new Date();
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n=(n)? n: parseInt(Math.random()*10000);
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return Math.round((Math.abs(Math.sin(t.getTime()))*(Math.random()*1000)))%n+1;
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};
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f.getGUID = function() { // Globally Unique ID
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var n1,n2,n3,n4;
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var l,r,m,c=Math.random()+'';
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c=c.substr(c.indexOf('.')+1);
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m=(c.length-1)/2;
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l=c.substr(0,m); r=c.substr(m);
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n1=this.getRandomNumber(1000);
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n2=this.getRandomNumber(255);n3=this.getRandomNumber(255);n4=this.getRandomNumber(255);
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n2 = (n2 < 16 ? '0' : '') + n2.toString(16);
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n3 = (n3 < 16 ? '0' : '') + n3.toString(16);
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n4 = (n4 < 16 ? '0' : '') + n4.toString(16);
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return (n1+n2+'-'+l+'-'+n3+n4+'-'+r).toUpperCase();
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};
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// Path Functions ------------------------
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// Combines separate [x1,x2],[y1,y2] arrays into a path array [x1,y1,x2,y2]
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f.interlacePaths = function (x,y) {
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var l = Math.max(x.length,y.length);
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var a = new Array(l*2);
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for (var i=0; i<l; i++) {
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a[i*2] = x[i];
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a[i*2+1] = y[i];
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}
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return a;
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};
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// Returns correct angle in radians between 2 points
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f.getNormalizedAngle = function (x1,y1,x2,y2) {
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var distx = Math.abs(x1-x2);
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var disty = Math.abs(y1-y2);
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if (distx==0 && disty==0) angle = 0;
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else if (distx==0) angle = Math.PI/2;
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else angle = Math.atan(disty/distx);
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if (x1<x2) {
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if (y1<y2) angle = Math.PI*2-angle;
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}
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else {
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if (y1<y2) angle = Math.PI+angle;
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else angle = Math.PI-angle;
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}
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return angle;
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};
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// Generates a path between 2 points in N steps
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f.generateLinePath = function(x1,y1,x2,y2,N) {
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if (N==0) return [];
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var dx = (x2 == x1)? 0 : (x2 - x1)/N;
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var dy = (y2 == y1)? 0 : (y2 - y1)/N;
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var path = new Array();
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for (var i=0;i<=N;i++) {
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path[i*2] = Math.round(x1 + i*dx);
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path[i*2+1] = Math.round(y1 + i*dy);
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}
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return path;
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};
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