class FlxTypedContainer<T>
package flixel.group
extends FlxTypedGroup › FlxBasic
import flixel.group.FlxContainer
extended by FlxState
An exclusive FlxGroup, meaning that a FlxBasic can only be in ONE container at any given time.
Adding them to a second container will remove them from any previous container they were in.
You can determine which container a basic is in by using the basic's container field.
When to use a group or container
FlxGroups are better for organising arbitrary groups for things like iterating or collision.
FlxContainers are recommended when you are adding them to the current FlxState, or a
child (or grandchild, and so on) of the state.
5.7.0
.Constructor
Inherited Variables
Defined by FlxTypedGroup
@:value(0)read onlylength:Int = 0
The number of entries in the members array. For performance and safety you should check this
variable instead of members.length unless you really know what you're doing!
maxSize:Int
The maximum capacity of this group. Default is 0, meaning no max capacity, and the group can just grow.
read onlymemberAdded:FlxTypedSignal<T ‑> Void>
A FlxSignal that dispatches when a child is added to this group.
4.4.0
.read onlymemberRemoved:FlxTypedSignal<T ‑> Void>
A FlxSignal that dispatches when a child is removed from this group.
4.4.0
.Defined by FlxBasic
@:value(idEnumerator++)ID:Int = idEnumerator++
A unique ID starting from 0 and increasing by 1 for each subsequent FlxBasic that is created.
@:value(true)alive:Bool = true
Useful state for many game objects - "dead" (!alive) vs alive. kill() and
revive() both flip this switch (along with exists, but you can override that).
cameras:Array<FlxCamera>
This determines on which FlxCameras this object will be drawn. If it is null / has not been
set, it uses the list of default draw targets, which is controlled via FlxG.camera.setDefaultDrawTarget
as well as the DefaultDrawTarget argument of FlxG.camera.add.
read onlycontainer:Null<FlxContainer>
The parent containing this basic, typically if you check this recursively you should reach the state
5.7.0
.Inherited Methods
Defined by FlxTypedGroup
add(basic:T):T
Adds a new FlxBasic subclass (FlxBasic, FlxSprite, Enemy, etc) to the group.
FlxGroup will try to replace a null member of the array first.
Failing that, FlxGroup will add it to the end of the member array.
WARNING: If the group has a maxSize that has already been met,
the object will NOT be added to the group!
Parameters:
basic | The |
|---|
Returns:
The same FlxBasic object that was passed in.
any(func:T ‑> Bool):Bool
Tests whether any member satisfies the function.
Parameters:
func | The function that tests the members |
|---|
5.4.0
.clear():Void
Remove all instances of FlxBasic subclasses (FlxSprite, FlxTileblock, etc) from the list.
WARNING: does not destroy() or kill() any of these objects!
countDead():Int
Call this function to find out how many members of the group are dead.
Returns:
The number of FlxBasics flagged as dead. Returns -1 if group is empty.
countLiving():Int
Call this function to find out how many members of the group are not dead.
Returns:
The number of FlxBasics flagged as not dead. Returns -1 if group is empty.
destroy():Void
WARNING: A destroyed FlxBasic can't be used anymore.
It may even cause crashes if it is still part of a group or state.
You may want to use kill() instead if you want to disable the object temporarily only and revive() it later.
This function is usually not called manually (Flixel calls it automatically during state switches for all add()ed objects).
Override this function to null out variables manually or call destroy() on class members if necessary.
Don't forget to call super.destroy()!
every(func:T ‑> Bool):Bool
Tests whether every member satisfies the function.
Parameters:
func | The function that tests the members |
|---|
5.4.0
.@:value({ recurse : false })forEach(func:T ‑> Void, recurse:Bool = false):Void
Applies a function to all members.
Parameters:
func | A function that modifies one element at a time. |
|---|---|
recurse | Whether or not to apply the function to members of subgroups as well. |
@:value({ recurse : false })forEachAlive(func:T ‑> Void, recurse:Bool = false):Void
Applies a function to all alive members.
Parameters:
func | A function that modifies one element at a time. |
|---|---|
recurse | Whether or not to apply the function to members of subgroups as well. |
@:value({ recurse : false })forEachDead(func:T ‑> Void, recurse:Bool = false):Void
Applies a function to all dead members.
Parameters:
func | A function that modifies one element at a time. |
|---|---|
recurse | Whether or not to apply the function to members of subgroups as well. |
@:value({ recurse : false })forEachExists(func:T ‑> Void, recurse:Bool = false):Void
Applies a function to all existing members.
Parameters:
func | A function that modifies one element at a time. |
|---|---|
recurse | Whether or not to apply the function to members of subgroups as well. |
@:value({ recurse : false })forEachOfType<K>(objectClass:Class<K>, func:K ‑> Void, recurse:Bool = false):Void
getFirst(func:T ‑> Bool):Null<T>
Searches for, and returns the first member that satisfies the function.
Parameters:
func | The function that tests the members |
|---|
5.4.0
.getFirstAlive():Null<T>
@:value({ force : false })getFirstAvailable(?objectClass:Class<T>, force:Bool = false):Null<T>
Call this function to retrieve the first object with exists == false in the group.
This is handy for recycling in general, e.g. respawning enemies.
Parameters:
objectClass | An optional parameter that lets you narrow the results to instances of this particular class. |
|---|---|
force | Force the object to be an |
Returns:
A FlxBasic currently flagged as not existing.
getFirstDead():Null<T>
getFirstExisting():Null<T>
getFirstIndex(func:T ‑> Bool):Int
Searches for, and returns the index of the first member that satisfies the function.
Parameters:
func | The function that tests the members |
|---|
5.4.0
.getFirstNull():Int
Call this function to retrieve the first index set to null.
Returns -1 if no index stores a null object.
Returns:
An Int indicating the first null slot in the group.
getLast(func:T ‑> Bool):Null<T>
Searches for, and returns the last member that satisfies the function.
Parameters:
func | The function that tests the members |
|---|
5.4.0
.getLastIndex(func:T ‑> Bool):Int
Searches for, and returns the index of the last member that satisfies the function.
Parameters:
func | The function that tests the members |
|---|
5.4.0
.@:value({ length : 0, startIndex : 0 })getRandom(startIndex:Int = 0, length:Int = 0):T
Returns a member at random from the group.
Parameters:
startIndex | Optional offset off the front of the array.
Default value is |
|---|---|
length | Optional restriction on the number of values you want to randomly select from. |
Returns:
A FlxBasic from the members list.
insert(position:Int, object:T):T
Inserts a new FlxBasic subclass (FlxBasic, FlxSprite, Enemy, etc)
into the group at the specified position.
FlxGroup will try to replace a null member at the specified position of the array first.
Failing that, FlxGroup will insert it at the position of the member array.
WARNING: If the group has a maxSize that has already been met,
the object will NOT be inserted to the group!
Parameters:
position | The position in the group where you want to insert the object. |
|---|---|
object | The object you want to insert into the group. |
Returns:
The same FlxBasic object that was passed in.
killMembers():Void
Calls kill() on the group's unkilled members. Revive them via reviveMembers().
5.4.0
.@:value({ revive : true, force : false })recycle(?objectClass:Class<T>, ?objectFactory:() ‑> T, force:Bool = false, revive:Bool = true):T
Recycling is designed to help you reuse game objects without always re-allocating or "newing" them.
It behaves differently depending on whether maxSize equals 0 or is bigger than 0.
maxSize > 0 / "rotating-recycling" (used by FlxEmitter):
- at capacity: returns the next object in line, no matter its properties like alive, exists etc.
- otherwise: returns a new object.
maxSize == 0 / "grow-style-recycling"
- tries to find the first object with exists == false
- otherwise: adds a new object to the members array
WARNING: If this function needs to create a new object, and no object class was provided,
it will return null instead of a valid object!
Parameters:
objectClass | The class type you want to recycle (e.g. |
|---|---|
objectFactory | Optional factory function to create a new object
if there aren't any dead members to recycle.
If |
force | Force the object to be an |
revive | Whether recycled members should automatically be revived
(by calling |
Returns:
A reference to the object that was created.
@:value({ splice : false })remove(basic:T, splice:Bool = false):T
Removes an object from the group.
Parameters:
basic | The |
|---|---|
splice | Whether the object should be cut from the array entirely or not. |
Returns:
The removed object.
replace(oldObject:T, newObject:T):T
Replaces an existing FlxBasic with a new one.
Does not do anything and returns null if the old object is not part of the group.
Parameters:
oldObject | The object you want to replace. |
|---|---|
newObject | The new object you want to use instead. |
Returns:
The new object.
reviveMembers():Void
Calls revive() on the group's killed members and then on the group itself.
5.4.0
.@:value({ order : FlxSort.ASCENDING })inlinesort(func:(Int, T, T) ‑> Int, order:Int = FlxSort.ASCENDING):Void
Call this function to sort the group according to a particular value and order.
For example, to sort game objects for Zelda-style overlaps you might call
group.sort(FlxSort.byY, FlxSort.ASCENDING) at the bottom of your FlxState#update() override.
Parameters:
func | The sorting function to use - you can use one of the premade ones in
|
|---|---|
order | A constant that defines the sort order.
Possible values are |
Defined by FlxBasic
getCameras():Array<FlxCamera>
The cameras that will draw this. Use this.cameras to set specific cameras for this object,
otherwise the container's cameras are used, or the container's container and so on. If there
is no container, say, if this is inside FlxGroups rather than a FlxContainer then the
default draw cameras are returned.
5.7.0
.