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// HEdge
// IN: vertex orig, vertex dest, Face face
export function HEdge (orig, dest, face) {
this.next = null;
this.prev = null;
this.twin = null;
this.orig = orig;
this.dest = dest;
this.iFace = face;
}
HEdge.prototype.isHorizon = function() {
return this.twin !== null && !this.iFace.marked && this.twin.iFace.marked;
}
// IN: array horizon
HEdge.prototype.findHorizon = function(horizon) {
if (this.isHorizon()) {
if (horizon.length > 0 && this === horizon[0]) {
return;
} else {
horizon.push(this);
this.next.findHorizon(horizon);
}
} else {
if (this.twin !== null) {
this.twin.next.findHorizon(horizon);
}
}
}
// IN: vertices origin and dest
HEdge.prototype.isEqual = function(origin, dest) {
return ((this.orig.equals(origin) && this.dest.equals(dest)) || (this.orig.equals(dest) && this.dest.equals(origin)));
}