@Override
public CoreRoute createRoute(Point start, Point end, String name) {
name = name == null ? getName() : name;
StraightRoute route =
new StraightRoute(name, start, getFirst().getTime(), end, getLast().getTime());
route.generateSegments(_states);
return route;
}
/** use a simple speed/time decision to decide if it's possible to navigate a route */
public void decideAchievableRoute(CoreRoute r) {
if (!r.isPossible() || !(r instanceof StraightRoute)) return;
StraightRoute route = (StraightRoute) r;
double distance = route.getDistance();
double elapsed = route.getElapsedTime();
double speed = distance / elapsed;
SpeedRange speedR = _states.get(0).getSpeed();
if (speedR != null && !speedR.allows(speed)) {
route.setImpossible();
return;
}
double thisC = route.getCourse();
CourseRange courseR = _states.get(0).getCourse();
if (courseR != null && !courseR.allows(thisC)) {
route.setImpossible();
return;
}
// examine the scaled polygons to see if this candidate route passes
// through all of them.
decideScaledPolygons(route);
}
/**
* create a straight leg.
*
* @param name what to call the leg
* @param states the set of bounded states that comprise the leg
*/
void decideScaledPolygons(StraightRoute theRoute) {
// do we already know this isn't possible?
if (!theRoute.isPossible()) return;
// bugger, we'll have to get on with our hard sums then
// sort out the origin.
State startState = theRoute.getStates().get(0);
Coordinate startCoord = startState.getLocation().getCoordinate();
// also sort out the end state
State endState = theRoute.getStates().get(theRoute.getStates().size() - 1);
Point endPt = endState.getLocation();
// remeber the start time
long tZero = startState.getTime().getTime();
// how long is the total run?
double elapsed = theRoute.getElapsedTime();
// allow for multiple fidelity processing
int ctr = 0;
// how frequently shall we process the polygons?
// calculating the scaled polygons is really expensive. this
// give us most of the benefits, at a third of the speed (well,
// with a freq of '3' it does)
final int freq = 3;
// loop through our states
Iterator<BoundedState> iter = _states.iterator();
while (iter.hasNext()) {
BoundedState thisB = iter.next();
LocationRange thisL = thisB.getLocation();
if (thisL != null) {
// ok, what's the time difference
long thisDelta = thisB.getTime().getTime() - tZero;
// convert to secs
long tDelta = thisDelta / 1000;
// is this our first state
if (tDelta > 0) {
// ok, we've got a location - increment the counter
ctr++;
// is this one we're going to process?
if (((ctr % freq) == 0) || ctr == _states.size() - 1) {
double scale = elapsed / tDelta;
// ok, project the shape forwards
AffineTransformation st =
AffineTransformation.scaleInstance(scale, scale, startCoord.x, startCoord.y);
// ok, apply the transform to the location
/*Geometry originalGeom = thisL.getGeometry();
Geometry newGeom = st.transform(originalGeom);
// see if the end point is in the new geometry
if (endPt.coveredBy(newGeom))
{
// cool, this route works
}
else
{
// bugger, can't do this one
theRoute.setImpossible();
break;
}*/
if (!MathUtils.rayTracing(endPt, thisL.getGeometry(), st)) {
theRoute.setImpossible();
break;
}
}
}
}
}
}
