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angeloped/angular_size.js

Created July 13, 2022 19:16
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angular size function. calculation extracted from https://www.1728.org
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angular_size.js
/angsize.htm
// angular size https://www.1728.org/angsize.htm
function angular_size(sz, r){
const raddeg = 57.2957795130823;
var arctan = Math.atan( (.5*sz) / r );
return arctan * 2 * raddeg;
}
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