public IEnumerable <IEnumerable <FloorSelection> > Select(BaseFloorSelector selector, Func <double> random, INamedDataCollection metadata, Func <KeyValuePair <string, string>[], Type[], ScriptReference> finder)
{
Contract.Requires(selector != null);
Contract.Requires(random != null);
Contract.Requires(metadata != null);
Contract.Requires(finder != null);
Contract.Ensures(Contract.Result <IEnumerable <IEnumerable <FloorSelection> > >() != null);
//How many items to emit?
var amount = _count.SelectIntValue(random, metadata);
//Result to emit
var emit = new List <List <FloorSelection> >();
//Create a selection function which either always returns the same value or doesn't, depending upon Vary
Func <FloorSelection> selectFloor;
if (Vary)
{
selectFloor = () => SelectSingle(selector, random, _tags, finder, Height.SelectFloatValue(random, metadata), Id);
}
else
{
var node = SelectSingle(selector, random, _tags, finder, Height.SelectFloatValue(random, metadata), Id);
selectFloor = () => node == null ? null : node.Clone();
}
if (Continuous)
{
var l = new List <FloorSelection>();
for (int i = 0; i < amount; i++)
{
var f = selectFloor();
if (f != null)
{
l.Add(f);
}
}
emit.Add(l);
}
else
{
for (int i = 0; i < amount; i++)
{
var f = selectFloor();
if (f != null)
{
emit.Add(new List <FloorSelection> {
f
});
}
}
}
return(emit);
}
private static FloorSelection SelectSingle(BaseFloorSelector selector, Func <double> random, IEnumerable <KeyValuePair <float, KeyValuePair <string, string>[]> > tags, Func <KeyValuePair <string, string>[], Type[], ScriptReference> finder, float height, string id)
{
Contract.Requires(selector != null);
Contract.Requires(random != null);
Contract.Requires(tags != null);
Contract.Requires(finder != null);
var result = tags.SelectScript(random, finder, typeof(IFloor));
if (result == null)
{
return(null);
}
return(new FloorSelection(id, result.Tags, result.Script, height));
}