/**
* @param before
* @param now
* @param after
* @param fastLength
*/
public segmentSpeeds(Rr2Point before, Rr2Point now, Rr2Point after, double fastLength) {
Rr2Point a = Rr2Point.sub(now, before);
double amod = a.mod();
abandon = amod == 0;
if (abandon) return;
Rr2Point b = Rr2Point.sub(after, now);
if (b.mod() == 0) ca = 0;
else ca = Rr2Point.mul(a.norm(), b.norm());
plotMiddle = true;
if (amod <= 2 * fastLength) {
fastLength = amod * 0.5;
plotMiddle = false;
}
a = a.norm();
p1 = Rr2Point.add(before, Rr2Point.mul(a, fastLength));
p2 = Rr2Point.add(p1, Rr2Point.mul(a, amod - 2 * fastLength));
p3 = Rr2Point.add(p2, Rr2Point.mul(a, fastLength));
}
