private Double shouldWeBreak(double desiredSpeed, World world) {
TrackModel track = world.getTrackModel();
double distance =
track.getLaneDistanceBetweenPieces(
track.getCurrent(), track.getNextCurve(), world.getMyLane());
double inPieceDistance = world.myPhysics.getPreviousPosition().inPieceDistance;
double distanceToCurve = distance - inPieceDistance;
double endSpeed;
double newThrottle = 0;
endSpeed = world.getMySpeed();
int ticksTillCurve = ticksToRunDistance(distanceToCurve, world, newThrottle);
if (ticksTillCurve == -1) return null;
for (int i = 0; i < ticksTillCurve; i++) {
endSpeed =
world.myPhysics.getAccelerationEstimator().getSpeedOnNextTick(endSpeed, newThrottle);
}
// Now we have reached the point that
if (endSpeed > desiredSpeed) {
return 0d;
} else {
return null;
}
}
@Override
public Double getThrottle(World world) {
TrackModel track = world.getTrackModel();
if (world.getMySpeed() == 0) {
return 1.0d;
}
if (track.getCurrent().equals(nextCurve)) {
// System.out.println(String.format(
// "Wanted speed to curve %s but was %s", speedForNextCurve,
// world.getMySpeed()));
nextCurve = null;
}
double curveSpeed = determineMaxCurveSpeed(track.getNextCurve()) * ERROR_CORRECTION;
if (curveSpeed > 10) curveSpeed = 10 * ERROR_CORRECTION;
this.nextCurve = track.getNextCurve();
this.speedForNextCurve = curveSpeed;
Double shouldWeBreak = shouldWeBreak(curveSpeed, world);
if (shouldWeBreak != null) {
return shouldWeBreak;
}
return null;
}
private int ticksToRunDistance(double distance, World world, double throttle) {
double speedAtStartOfTick = world.getMySpeed();
int ticks = 0;
while (distance > 0) {
double speedAtEndOfTick =
world
.myPhysics
.getAccelerationEstimator()
.getSpeedOnNextTick(speedAtStartOfTick, throttle);
double distanceToTravelInNextTick = (speedAtEndOfTick + speedAtEndOfTick) / 2;
if (distanceToTravelInNextTick < 0.0001) return -1;
distance -= distanceToTravelInNextTick;
ticks++;
speedAtStartOfTick = speedAtEndOfTick;
}
return ticks;
}