/**
* Initialize this entity for an object.
*
* @param base The object.
* @see #release()
*/
@Override
public void initialize(final RPObject base) {
double speed;
super.initialize(base);
if (base.has("dir")) {
setDirection(Direction.build(base.getInt("dir")));
}
if (base.has("speed")) {
speed = base.getDouble("speed");
} else {
speed = 0.0;
}
dx = direction.getdx() * speed;
dy = direction.getdy() * speed;
}
/**
* Process attribute changes that may affect positioning. This is needed because different
* entities may want to process coordinate changes more gracefully.
*
* @param base The previous values.
* @param diff The changes.
*/
@Override
protected void processPositioning(final RPObject base, final RPObject diff) {
// Real movement case
final int oldx = base.getInt("x");
final int oldy = base.getInt("y");
int newX = oldx;
int newY = oldy;
if (diff.has("x")) {
newX = diff.getInt("x");
}
if (diff.has("y")) {
newY = diff.getInt("y");
}
Direction tempDirection;
if (diff.has("dir")) {
tempDirection = Direction.build(diff.getInt("dir"));
setDirection(tempDirection);
} else if (base.has("dir")) {
tempDirection = Direction.build(base.getInt("dir"));
setDirection(tempDirection);
} else {
tempDirection = Direction.STOP;
}
double speed;
/*
* Speed change must be fired only after the new speed has been stored
* (done in onMove())
*/
boolean speedChanged = false;
if (diff.has("speed")) {
speed = diff.getDouble("speed");
speedChanged = true;
} else if (base.has("speed")) {
speed = base.getDouble("speed");
} else {
speed = 0;
}
onMove(newX, newY, tempDirection, speed);
if (speedChanged) {
fireChange(PROP_SPEED);
}
boolean positionChanged = false;
if ((Direction.STOP.equals(tempDirection)) || (speed == 0)) {
setSpeed(0.0, 0.0);
/*
* Try to ensure relocation in the case the client and server were
* in disagreement about the position at the moment of stopping.
*/
if (!(compareDouble(y, newY, EPSILON) && compareDouble(x, newX, EPSILON))) {
positionChanged = true;
}
// Store the new position before signaling it with onPosition().
x = newX;
y = newY;
}
/*
* Change in position?
*/
if (positionChanged || ((oldx != newX) && (oldy != newY))) {
onPosition(newX, newY);
}
}
