Function getSign

docs/app/js/sanddance-app.js:148818–148818

(orient, a, b)

}
const isX = (orient)=>orient === Bottom || orient === Top; // get sign coefficient based on axis orient
const getSign = (orient, a, b)=>isSignal(orient) ? ifLeftTopExpr(orient.signal, a, b) : orient === Left || orient === Top ? a : b; // condition on axis x-direction
const ifX = (orient, a, b)=>isSignal(orient) ? ifXEnc(orient.signal, a, b) : isX(orient) ? a : b; // condition on axis y-direction
const ifY = (orient, a, b)=>isSignal(orient) ? ifYEnc(orient.signal, a, b) : isX(orient) ? b : a;
const ifTop = (orient, a, b)=>isSignal(orient) ? ifTopExpr(orient.signal, a, b) : orient === Top ? {