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Phaser . GameObjects . Layer
Phaser . GameObjects . Layer
A Layer Game Object.
A Layer is a special type of Game Object that acts as a Display List. You can add any type of Game Object to a Layer, just as you would to a Scene. Layers can be used to visually group together 'layers' of Game Objects:
const spaceman = this.add.sprite(150, 300, 'spaceman');
const bunny = this.add.sprite(400, 300, 'bunny');
const elephant = this.add.sprite(650, 300, 'elephant');
const layer = this.add.layer();
layer.add([ spaceman, bunny, elephant ]);
The 3 sprites in the example above will now be managed by the Layer they were added to. Therefore,
if you then set layer.setVisible(false) they would all vanish from the display.
You can also control the depth of the Game Objects within the Layer. For example, calling the
setDepth method of a child of a Layer will allow you to adjust the depth of that child within the
Layer itself, rather than the whole Scene. The Layer, too, can have its depth set as well.
The Layer class also offers many different methods for manipulating the list, such as the
methods moveUp, moveDown, sendToBack, bringToTop and so on. These allow you to change the
display list position of the Layers children, causing it to adjust the order in which they are
rendered. Using setDepth on a child allows you to override this.
Layers can have Post FX Pipelines set, which allows you to easily enable a post pipeline across a whole range of children, which, depending on the effect, can often be far more efficient that doing so on a per-child basis.
Layers have no position or size within the Scene. This means you cannot enable a Layer for physics or input, or change the position, rotation or scale of a Layer. They also have no scroll factor, texture, tint, origin, crop or bounds.
If you need those kind of features then you should use a Container instead. Containers can be added to Layers, but Layers cannot be added to Containers.
However, you can set the Alpha, Blend Mode, Depth, Mask and Visible state of a Layer. These settings will impact all children being rendered by the Layer.
Constructor:
new Layer(scene, [children])
Parameters:
| name | type | arguments | description |
|---|---|---|---|
| scene | Phaser.Scene |
The Scene to which this Game Object belongs. A Game Object can only belong to one Scene at a time. |
|
| children | Array.<Phaser.GameObjects.GameObject> | <optional> |
An optional array of Game Objects to add to this Layer. |
Extends
- Phaser.Structs.List.<Phaser.GameObjects.GameObject>
- Phaser.GameObjects.Components.AlphaSingle
- Phaser.GameObjects.Components.BlendMode
- Phaser.GameObjects.Components.Depth
- Phaser.GameObjects.Components.Mask
- Phaser.GameObjects.Components.Pipeline
- Phaser.GameObjects.Components.Visible
Members
Description:
The active state of this Game Object.
A Game Object with an active state of true is processed by the Scenes UpdateList, if added to it.
An active object is one which is having its logic and internal systems updated.
Type:
Description:
The alpha value of the Game Object.
This is a global value, impacting the entire Game Object, not just a region of it.
Type:
Description:
Sets the Blend Mode being used by this Game Object.
This can be a const, such as Phaser.BlendModes.SCREEN, or an integer, such as 4 (for Overlay)
Under WebGL only the following Blend Modes are available:
- ADD
- MULTIPLY
- SCREEN
- ERASE
Canvas has more available depending on browser support.
You can also create your own custom Blend Modes in WebGL.
Blend modes have different effects under Canvas and WebGL, and from browser to browser, depending on support. Blend Modes also cause a WebGL batch flush should it encounter a new blend mode. For these reasons try to be careful about the construction of your Scene and the frequency of which blend modes are used.
Type:
Description:
This property is kept purely so a Layer has the same shape as a Game Object. You cannot give a Layer a physics body.
Type:
Description:
A bitmask that controls if this Game Object is drawn by a Camera or not.
Not usually set directly, instead call Camera.ignore, however you can
set this property directly using the Camera.id property:
Type:
Description:
A Data Manager.
It allows you to store, query and get key/value paired information specific to this Game Object.
null by default. Automatically created if you use getData or setData or setDataEnabled.
Type:
Description:
The initial WebGL pipeline of this Game Object.
If you call resetPipeline on this Game Object, the pipeline is reset to this default.
Description:
The depth of this Game Object within the Scene.
The depth is also known as the 'z-index' in some environments, and allows you to change the rendering order of Game Objects, without actually moving their position in the display list.
The default depth is zero. A Game Object with a higher depth value will always render in front of one with a lower value.
Setting the depth will queue a depth sort event within the Scene.
Type:
Description:
Holds a reference to the Display List that contains this Game Object.
This is set automatically when this Game Object is added to a Scene or Layer.
You should treat this property as being read-only.
Description:
A reference to the Scene Event Emitter.
Description:
Does this Game Object have any Post Pipelines set?
Type:
Description:
This Game Object will ignore all calls made to its destroy method if this flag is set to true.
This includes calls that may come from a Group, Container or the Scene itself.
While it allows you to persist a Game Object across Scenes, please understand you are entirely
responsible for managing references to and from this Game Object.
Type:
Description:
This property is kept purely so a Layer has the same shape as a Game Object. You cannot input enable a Layer.
Description:
The Mask this Game Object is using during render.
Description:
The name of this Game Object. Empty by default and never populated by Phaser, this is left for developers to use.
Type:
Description:
A Layer cannot be placed inside a Container.
This property is kept purely so a Layer has the same shape as a Game Object.
Description:
The current WebGL pipeline of this Game Object.
Description:
An object to store pipeline specific data in, to be read by the pipelines this Game Object uses.
Type:
Description:
The WebGL Post FX Pipelines this Game Object uses for post-render effects.
The pipelines are processed in the order in which they appear in this array.
If you modify this array directly, be sure to set the
hasPostPipeline property accordingly.
Type:
Description:
The flags that are compared against RENDER_MASK to determine if this Game Object will render or not.
The bits are 0001 | 0010 | 0100 | 1000 set by the components Visible, Alpha, Transform and Texture respectively.
If those components are not used by your custom class then you can use this bitmask as you wish.
Type:
Description:
A reference to the Scene to which this Game Object belongs.
Game Objects can only belong to one Scene.
You should consider this property as being read-only. You cannot move a Game Object to another Scene by simply changing it.
Type:
Description:
The flag the determines whether Game Objects should be sorted when depthSort() is called.
Type:
Description:
The current state of this Game Object.
Phaser itself will never modify this value, although plugins may do so.
Use this property to track the state of a Game Object during its lifetime. For example, it could change from a state of 'moving', to 'attacking', to 'dead'. The state value should be an integer (ideally mapped to a constant in your game code), or a string. These are recommended to keep it light and simple, with fast comparisons. If you need to store complex data about your Game Object, look at using the Data Component instead.
Type:
Description:
The Tab Index of the Game Object. Reserved for future use by plugins and the Input Manager.
Type:
Description:
A textual representation of this Game Object, i.e. sprite.
Used internally by Phaser but is available for your own custom classes to populate.
Type:
Description:
The visible state of the Game Object.
An invisible Game Object will skip rendering, but will still process update logic.
Type:
Methods
Description:
This callback is invoked when this Game Object is added to a Scene.
Can be overriden by custom Game Objects, but be aware of some Game Objects that will use this, such as Sprites, to add themselves into the Update List.
You can also listen for the ADDED_TO_SCENE event from this Game Object.
Description:
Clears all alpha values associated with this Game Object.
Immediately sets the alpha levels back to 1 (fully opaque).
Returns:
Description:
This Game Object instance.
Type:
Description:
Clears the mask that this Game Object was using.
Parameters:
| name | type | arguments | Default | description |
|---|---|---|---|---|
| destroyMask | boolean | <optional> | false |
Destroy the mask before clearing it? |
Returns:
Description:
This Game Object instance.
Type:
Description:
Creates and returns a Bitmap Mask. This mask can be used by any Game Object, including this one.
Note: Bitmap Masks only work on WebGL. Geometry Masks work on both WebGL and Canvas.
To create the mask you need to pass in a reference to a renderable Game Object. A renderable Game Object is one that uses a texture to render with, such as an Image, Sprite, Render Texture or BitmapText.
If you do not provide a renderable object, and this Game Object has a texture, it will use itself as the object. This means you can call this method to create a Bitmap Mask from any renderable Game Object.
Parameters:
| name | type | arguments | description |
|---|---|---|---|
| renderable | Phaser.GameObjects.GameObject | <optional> |
A renderable Game Object that uses a texture, such as a Sprite. |
Returns:
Description:
This Bitmap Mask that was created.
Description:
Creates and returns a Geometry Mask. This mask can be used by any Game Object, including this one.
To create the mask you need to pass in a reference to a Graphics Game Object.
If you do not provide a graphics object, and this Game Object is an instance of a Graphics object, then it will use itself to create the mask.
This means you can call this method to create a Geometry Mask from any Graphics Game Object.
Parameters:
| name | type | arguments | description |
|---|---|---|---|
| graphics | Phaser.GameObjects.Graphics | <optional> |
A Graphics Game Object. The geometry within it will be used as the mask. |
Returns:
Description:
This Geometry Mask that was created.
Description:
Immediately sorts the display list if the flag is set.
Description:
Destroys this Layer removing it from the Display List and Update List and severing all ties to parent resources.
Also destroys all children of this Layer. If you do not wish for the children to be destroyed, you should move them from this Layer first.
Use this to remove this Layer from your game if you don't ever plan to use it again. As long as no reference to it exists within your own code it should become free for garbage collection by the browser.
If you just want to temporarily disable an object then look at using the Game Object Pool instead of destroying it, as destroyed objects cannot be resurrected.
Description:
A Layer cannot be enabled for input.
This method does nothing and is kept to ensure the Layer has the same shape as a Game Object.
Returns:
Description:
This GameObject.
Type:
Description:
Returns an array which contains all Game Objects within this Layer.
This is a reference to the main list array, not a copy of it, so be careful not to modify it.
Returns:
Description:
The group members.
Type:
- Array.<Phaser.GameObjects.GameObject>
Description:
Retrieves the value for the given key in this Game Objects Data Manager, or undefined if it doesn't exist.
You can also access values via the values object. For example, if you had a key called gold you can do either:
sprite.getData('gold');
Or access the value directly:
sprite.data.values.gold;
You can also pass in an array of keys, in which case an array of values will be returned:
sprite.getData([ 'gold', 'armor', 'health' ]);
This approach is useful for destructuring arrays in ES6.
Parameters:
| name | type | description |
|---|---|---|
| key | string | Array.<string> |
The key of the value to retrieve, or an array of keys. |
Returns:
Description:
The value belonging to the given key, or an array of values, the order of which will match the input array.
Type:
- *
Description:
Returns an array containing the display list index of either this Game Object, or if it has one, its parent Container. It then iterates up through all of the parent containers until it hits the root of the display list (which is index 0 in the returned array).
Used internally by the InputPlugin but also useful if you wish to find out the display depth of this Game Object and all of its ancestors.
Returns:
Description:
An array of display list position indexes.
Type:
- Array.<number>
Description:
Gets the name of the WebGL Pipeline this Game Object is currently using.
Returns:
Description:
The string-based name of the pipeline being used by this Game Object.
Type:
- string
Description:
Gets a Post Pipeline instance from this Game Object, based on the given name, and returns it.
Parameters:
| name | type | description |
|---|---|---|
| pipeline | string | function | Phaser.Renderer.WebGL.Pipelines.PostFXPipeline |
The string-based name of the pipeline, or a pipeline class. |
Returns:
Description:
The Post Pipeline/s matching the name, or undefined if no match. If more than one match they are returned in an array.
Type:
Description:
Increase a value for the given key within this Game Objects Data Manager. If the key doesn't already exist in the Data Manager then it is increased from 0.
If the Game Object has not been enabled for data (via setDataEnabled) then it will be enabled
before setting the value.
If the key doesn't already exist in the Data Manager then it is created.
When the value is first set, a setdata event is emitted from this Game Object.
Parameters:
| name | type | arguments | description |
|---|---|---|---|
| key | string | object |
The key to increase the value for. |
|
| data | * | <optional> |
The value to increase for the given key. |
Returns:
Description:
This GameObject.
Type:
Description:
Sets the initial WebGL Pipeline of this Game Object.
This should only be called during the instantiation of the Game Object. After that, use setPipeline.
Parameters:
| name | type | description |
|---|---|---|
| pipeline | string | Phaser.Renderer.WebGL.WebGLPipeline |
Either the string-based name of the pipeline, or a pipeline instance to set. |
Returns:
Description:
true if the pipeline was set successfully, otherwise false.
Type:
- boolean
Description:
Force a sort of the display list on the next call to depthSort.
Description:
A Layer cannot be enabled for input.
This method does nothing and is kept to ensure the Layer has the same shape as a Game Object.
Returns:
Description:
This GameObject.
Type:
Description:
Removes a type of Post Pipeline instances from this Game Object, based on the given name, and destroys them.
If you wish to remove all Post Pipelines use the resetPostPipeline method instead.
Parameters:
| name | type | description |
|---|---|---|
| pipeline | string | Phaser.Renderer.WebGL.Pipelines.PostFXPipeline |
The string-based name of the pipeline, or a pipeline class. |
Returns:
Description:
This Game Object.
Type:
Description:
This callback is invoked when this Game Object is removed from a Scene.
Can be overriden by custom Game Objects, but be aware of some Game Objects that will use this, such as Sprites, to removed themselves from the Update List.
You can also listen for the REMOVED_FROM_SCENE event from this Game Object.
Description:
Resets the WebGL Pipeline of this Game Object back to the default it was created with.
Parameters:
| name | type | arguments | Default | description |
|---|---|---|---|---|
| resetPostPipelines | boolean | <optional> | false |
Reset all of the post pipelines? |
| resetData | boolean | <optional> | false |
Reset the |
Returns:
Description:
true if the pipeline was reset successfully, otherwise false.
Type:
- boolean
Description:
Resets the WebGL Post Pipelines of this Game Object. It does this by calling
the destroy method on each post pipeline and then clearing the local array.
Parameters:
| name | type | arguments | Default | description |
|---|---|---|---|---|
| resetData | boolean | <optional> | false |
Reset the |
Description:
Sets the active property of this Game Object and returns this Game Object for further chaining.
A Game Object with its active property set to true will be updated by the Scenes UpdateList.
Parameters:
| name | type | description |
|---|---|---|
| value | boolean |
True if this Game Object should be set as active, false if not. |
Returns:
Description:
This GameObject.
Type:
Description:
Set the Alpha level of this Game Object. The alpha controls the opacity of the Game Object as it renders. Alpha values are provided as a float between 0, fully transparent, and 1, fully opaque.
Parameters:
| name | type | arguments | Default | description |
|---|---|---|---|---|
| value | number | <optional> | 1 |
The alpha value applied across the whole Game Object. |
Returns:
Description:
This Game Object instance.
Type:
Description:
Sets the Blend Mode being used by this Game Object.
This can be a const, such as Phaser.BlendModes.SCREEN, or an integer, such as 4 (for Overlay)
Under WebGL only the following Blend Modes are available:
- ADD
- MULTIPLY
- SCREEN
- ERASE (only works when rendering to a framebuffer, like a Render Texture)
Canvas has more available depending on browser support.
You can also create your own custom Blend Modes in WebGL.
Blend modes have different effects under Canvas and WebGL, and from browser to browser, depending on support. Blend Modes also cause a WebGL batch flush should it encounter a new blend mode. For these reasons try to be careful about the construction of your Scene and the frequency in which blend modes are used.
Parameters:
| name | type | description |
|---|---|---|
| value | string | Phaser.BlendModes |
The BlendMode value. Either a string or a CONST. |
Returns:
Description:
This Game Object instance.
Type:
Description:
Allows you to store a key value pair within this Game Objects Data Manager.
If the Game Object has not been enabled for data (via setDataEnabled) then it will be enabled
before setting the value.
If the key doesn't already exist in the Data Manager then it is created.
sprite.setData('name', 'Red Gem Stone');
You can also pass in an object of key value pairs as the first argument:
sprite.setData({ name: 'Red Gem Stone', level: 2, owner: 'Link', gold: 50 });
To get a value back again you can call getData:
sprite.getData('gold');
Or you can access the value directly via the values property, where it works like any other variable:
sprite.data.values.gold += 50;
When the value is first set, a setdata event is emitted from this Game Object.
If the key already exists, a changedata event is emitted instead, along an event named after the key.
For example, if you updated an existing key called PlayerLives then it would emit the event changedata-PlayerLives.
These events will be emitted regardless if you use this method to set the value, or the direct values setter.
Please note that the data keys are case-sensitive and must be valid JavaScript Object property strings.
This means the keys gold and Gold are treated as two unique values within the Data Manager.
Parameters:
| name | type | arguments | description |
|---|---|---|---|
| key | string | object |
The key to set the value for. Or an object of key value pairs. If an object the |
|
| data | * | <optional> |
The value to set for the given key. If an object is provided as the key this argument is ignored. |
Returns:
Description:
This GameObject.
Type:
Description:
Adds a Data Manager component to this Game Object.
Returns:
Description:
This GameObject.
Type:
Description:
The depth of this Game Object within the Scene.
The depth is also known as the 'z-index' in some environments, and allows you to change the rendering order of Game Objects, without actually moving their position in the display list.
The default depth is zero. A Game Object with a higher depth value will always render in front of one with a lower value.
Setting the depth will queue a depth sort event within the Scene.
Parameters:
| name | type | description |
|---|---|---|
| value | number |
The depth of this Game Object. |
Returns:
Description:
This Game Object instance.
Type:
Description:
A Layer cannot be enabled for input.
This method does nothing and is kept to ensure the Layer has the same shape as a Game Object.
Returns:
Description:
This GameObject.
Type:
Description:
Sets the mask that this Game Object will use to render with.
The mask must have been previously created and can be either a GeometryMask or a BitmapMask. Note: Bitmap Masks only work on WebGL. Geometry Masks work on both WebGL and Canvas.
If a mask is already set on this Game Object it will be immediately replaced.
Masks are positioned in global space and are not relative to the Game Object to which they are applied. The reason for this is that multiple Game Objects can all share the same mask.
Masks have no impact on physics or input detection. They are purely a rendering component that allows you to limit what is visible during the render pass.
Parameters:
| name | type | description |
|---|---|---|
| mask | Phaser.Display.Masks.BitmapMask | Phaser.Display.Masks.GeometryMask |
The mask this Game Object will use when rendering. |
Returns:
Description:
This Game Object instance.
Type:
Description:
Sets the name property of this Game Object and returns this Game Object for further chaining.
The name property is not populated by Phaser and is presented for your own use.
Parameters:
| name | type | description |
|---|---|---|
| value | string |
The name to be given to this Game Object. |
Returns:
Description:
This GameObject.
Type:
Description:
Sets the main WebGL Pipeline of this Game Object.
Also sets the pipelineData property, if the parameter is given.
Both the pipeline and post pipelines share the same pipeline data object.
Parameters:
| name | type | arguments | Default | description |
|---|---|---|---|---|
| pipeline | string | Phaser.Renderer.WebGL.WebGLPipeline |
Either the string-based name of the pipeline, or a pipeline instance to set. |
||
| pipelineData | object | <optional> |
Optional pipeline data object that is deep copied into the |
|
| copyData | boolean | <optional> | true |
Should the pipeline data object be deep copied into the |
Returns:
Description:
This Game Object instance.
Type:
Description:
Adds an entry to the pipelineData object belonging to this Game Object.
If the 'key' already exists, its value is updated. If it doesn't exist, it is created.
If value is undefined, and key exists, key is removed from the data object.
Both the pipeline and post pipelines share the pipeline data object together.
Parameters:
| name | type | arguments | description |
|---|---|---|---|
| key | string |
The key of the pipeline data to set, update, or delete. |
|
| value | any | <optional> |
The value to be set with the key. If |
Returns:
Description:
This Game Object instance.
Type:
Description:
Sets one, or more, Post Pipelines on this Game Object.
Post Pipelines are invoked after this Game Object has rendered to its target and are commonly used for post-fx.
The post pipelines are appended to the postPipelines array belonging to this
Game Object. When the renderer processes this Game Object, it iterates through the post
pipelines in the order in which they appear in the array. If you are stacking together
multiple effects, be aware that the order is important.
If you call this method multiple times, the new pipelines will be appended to any existing
post pipelines already set. Use the resetPostPipeline method to clear them first, if required.
You can optionally also sets the pipelineData property, if the parameter is given.
Both the pipeline and post pipelines share the pipeline data object together.
Parameters:
| name | type | arguments | Default | description |
|---|---|---|---|---|
| pipelines | string | Array.<string> | function | Array.<function()> | Phaser.Renderer.WebGL.Pipelines.PostFXPipeline | Array.<Phaser.Renderer.WebGL.Pipelines.PostFXPipeline> |
Either the string-based name of the pipeline, or a pipeline instance, or class, or an array of them. |
||
| pipelineData | object | <optional> |
Optional pipeline data object that is deep copied into the |
|
| copyData | boolean | <optional> | true |
Should the pipeline data object be deep copied into the |
Returns:
Description:
This Game Object instance.
Type:
Description:
Sets the current state of this Game Object.
Phaser itself will never modify the State of a Game Object, although plugins may do so.
For example, a Game Object could change from a state of 'moving', to 'attacking', to 'dead'. The state value should typically be an integer (ideally mapped to a constant in your game code), but could also be a string. It is recommended to keep it light and simple. If you need to store complex data about your Game Object, look at using the Data Component instead.
Parameters:
| name | type | description |
|---|---|---|
| value | number | string |
The state of the Game Object. |
Returns:
Description:
This GameObject.
Type:
Description:
Sets the visibility of this Game Object.
An invisible Game Object will skip rendering, but will still process update logic.
Parameters:
| name | type | description |
|---|---|---|
| value | boolean |
The visible state of the Game Object. |
Returns:
Description:
This Game Object instance.
Type:
Description:
Compare the depth of two Game Objects.
Parameters:
| name | type | description |
|---|---|---|
| childA | Phaser.GameObjects.GameObject |
The first Game Object. |
| childB | Phaser.GameObjects.GameObject |
The second Game Object. |
Returns:
Description:
The difference between the depths of each Game Object.
Type:
- number
Description:
Returns a JSON representation of the Game Object.
Returns:
Description:
A JSON representation of the Game Object.
Description:
Toggle a boolean value for the given key within this Game Objects Data Manager. If the key doesn't already exist in the Data Manager then it is toggled from false.
If the Game Object has not been enabled for data (via setDataEnabled) then it will be enabled
before setting the value.
If the key doesn't already exist in the Data Manager then it is created.
When the value is first set, a setdata event is emitted from this Game Object.
Parameters:
| name | type | description |
|---|---|---|
| key | string | object |
The key to toggle the value for. |
Returns:
Description:
This GameObject.
Type:
Description:
To be overridden by custom GameObjects. Allows base objects to be used in a Pool.
Parameters:
| name | type | arguments | description |
|---|---|---|---|
| args | * | <optional> |
args |
Description:
Compares the renderMask with the renderFlags to see if this Game Object will render or not. Also checks the Game Object against the given Cameras exclusion list.
Parameters:
| name | type | description |
|---|---|---|
| camera | Phaser.Cameras.Scene2D.Camera |
The Camera to check against this Game Object. |
Returns:
Description:
True if the Game Object should be rendered, otherwise false.
Type:
- boolean