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lucaswadedavis 2016-12-15 11:24:22 -08:00
commit 603bdb1878
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js/geo.js Normal file
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geo={};
geo.getPoint=function(x,y,r,theta){
theta+=90;
theta=theta*(Math.PI/180);
var x2=x+(r*Math.sin(theta));
var y2=y+(r*Math.cos(theta));
var circle={x1:x,y1:y,r:r,x2:x2,y2:y2};
return circle;
};
geo.arcPath=function(x,y,r,theta1,theta2,w){
var f1=0;
var f2=0;
var f3=0;
var f4=1;
if ((theta2-theta1)>180){
f1=1;
f3=1;
}
var arcPath="";
arcPath+="M "+geo.getPoint(x,y,r,theta1).x2+" "+geo.getPoint(x,y,r,theta1).y2;
arcPath+=" A "+r+" "+r+" "+(theta2-theta1)+" "+f1+" "+f2+" "+geo.getPoint(x,y,r,theta2).x2+" "+geo.getPoint(x,y,r,theta2).y2;
arcPath+=" L "+geo.getPoint(x,y,(r-w),theta2).x2+" "+geo.getPoint(x,y,(r-w),theta2).y2;
arcPath+=" A "+(r-w)+" "+(r-w)+" "+(theta2-theta1)+" "+f3+" "+f4+" "+geo.getPoint(x,y,(r-w),theta1).x2+" "+geo.getPoint(x,y,(r-w),theta1).y2;
arcPath+=" Z";
return arcPath;
};
geo.ngon=function(x,y,r,n){
if (!n){n=3};
var path="";
path+="M "+geo.getPoint(x,y,r,0).x2+" "+geo.getPoint(x,y,r,0).y2;
for (var i=0;i<n;i++){
var interval=360/n;
var theta=interval*i;
path+=" L"+geo.getPoint(x,y,r,theta).x2+" "+geo.getPoint(x,y,r,theta).y2;
}
path+="Z";
var ngon=model.paper.path(path).attr({"stroke":"#fff"});
return ngon;
};
geo.orbital=function(x,y,r,n,color){
if (!x){x=model.bounds.right/2;}
if (!y){y=model.bounds.bottom/2;}
if (!r){r=model.bounds.bottom/3;}
if (!n){n=1;}
if (!color){color="#FFF";}
var set=[];
for (var i=0;i<n;i++){
var theta1=_.random(180);
var theta2=theta1+(18*_.random(1,20));
var w=(0.1*r)*_.random(1,3);
var arcPath=geo.arcPath(x,y,r,theta1,theta2,w);
var circle=model.paper.path(arcPath)
.attr({"fill":color,"fill-opacity":0.5})
set.push(circle);
}
return set;
};
module.exports = geo;