@Override
public void perform(final org.nlogo.nvm.Context context) {
Turtle turtle = argEvalTurtle(context, 0);
if (turtle.id() == -1) {
throw new EngineException(
context,
this,
I18N.errorsJ().getN("org.nlogo.$common.thatAgentIsDead", turtle.classDisplayName()));
}
world.observer().setPerspective(PerspectiveJ.RIDE(), turtle);
context.ip = next;
}
@Override
public void perform(final Context context) throws LogoException {
int numberOfTurtles = argEvalIntValue(context, 0);
if (numberOfTurtles > 0) {
AgentSet agentset = new ArrayAgentSet(Turtle.class, numberOfTurtles, false, world);
AgentSet breed = breedName == NO_BREED ? world.turtles() : world.getBreed(breedName);
for (int i = 0; i < numberOfTurtles; i++) {
Turtle turtle = world.createTurtle(breed);
turtle.colorDouble(Double.valueOf(10.0 * i + 5.0));
turtle.heading((360.0 * i) / numberOfTurtles);
agentset.add(turtle);
workspace.joinForeverButtons(turtle);
}
context.runExclusiveJob(agentset, next);
}
context.ip = offset;
}
public void perform_1(final Context context) {
Turtle turtle = (Turtle) context.agent;
turtle.moveToPatchCenter();
Patch patch = turtle.getPatchHere();
double winningValue = Double.MAX_VALUE;
List<Patch> winners = new ArrayList<Patch>();
for (AgentSet.Iterator it = patch.getNeighbors4().iterator(); it.hasNext(); ) {
Patch tester = (Patch) it.next();
Object value = tester.getPatchVariable(reference.vn());
if (!(value instanceof Double)) {
continue;
}
double dvalue = ((Double) value).doubleValue();
// need to be careful here to handle properly the case where
// dvalue equals Double.MAX_VALUE - ST 10/11/04, 1/6/07
if (dvalue <= winningValue) {
if (dvalue < winningValue) {
winningValue = dvalue;
winners.clear();
}
winners.add(tester);
}
}
if (!winners.isEmpty()
&& (!(patch.getPatchVariable(reference.vn()) instanceof Double)
|| winningValue < ((Double) patch.getPatchVariable(reference.vn())).doubleValue())) {
Patch winner = winners.get(context.job.random.nextInt(winners.size()));
turtle.face(winner, true);
try {
turtle.moveTo(winner);
} catch (AgentException ex) {
// should be impossible
throw new IllegalStateException(ex);
}
}
context.ip = next;
}