pc.Sprite
Extends: pc.EventHandler
A pc.Sprite is contains references to one or more frames of a pc.TextureAtlas. It can be used by the pc.SpriteComponent or the pc.ElementComponent to render a single frame or a sprite animation.
Summary
Properties
| atlas | The texture atlas. |
| frameKeys | The keys of the frames in the sprite atlas that this sprite is using. |
| meshes | An array that contains a mesh for each frame. |
| pixelsPerUnit | The number of pixels that map to one PlayCanvas unit. |
| renderMode | The rendering mode of the sprite. |
Methods
| destroy | Free up the meshes created by the sprite. |
Inherited
Methods
| fire | Fire an event, all additional arguments are passed on to the event listener. |
| hasEvent | Test if there are any handlers bound to an event name. |
| off | Detach an event handler from an event. |
| on | Attach an event handler to an event. |
| once | Attach an event handler to an event. |
Details
Constructor
Sprite(device, [options])
Parameters
| device | pc.GraphicsDevice | The graphics device of the application. |
| options | object | Options for creating the pc.Sprite. |
| options.pixelsPerUnit | number | The number of pixels that map to one PlayCanvas unit. Defaults to 1. |
| options.renderMode | number | The rendering mode of the sprite. Can be: Defaults to pc.SPRITE_RENDERMODE_SIMPLE. |
| options.atlas | pc.TextureAtlas | The texture atlas. Defaults to null. |
| options.frameKeys | string[] | The keys of the frames in the sprite atlas that this sprite is using. Defaults to null. |
Properties
Methods
destroy()
Free up the meshes created by the sprite.
Inherited
Methods
fire(name, [arg1], [arg2], [arg3], [arg4], [arg5], [arg6], [arg7], [arg8])
Fire an event, all additional arguments are passed on to the event listener.
obj.fire('test', 'This is the message');
Parameters
| name | object | Name of event to fire. |
| arg1 | * | First argument that is passed to the event handler. |
| arg2 | * | Second argument that is passed to the event handler. |
| arg3 | * | Third argument that is passed to the event handler. |
| arg4 | * | Fourth argument that is passed to the event handler. |
| arg5 | * | Fifth argument that is passed to the event handler. |
| arg6 | * | Sixth argument that is passed to the event handler. |
| arg7 | * | Seventh argument that is passed to the event handler. |
| arg8 | * | Eighth argument that is passed to the event handler. |
Returns
pc.EventHandlerSelf for chaining.
hasEvent(name)
Test if there are any handlers bound to an event name.
obj.on('test', function () { }); // bind an event to 'test'
obj.hasEvent('test'); // returns true
obj.hasEvent('hello'); // returns false
Parameters
| name | string | The name of the event to test. |
Returns
booleanTrue if the object has handlers bound to the specified event name.
off([name], [callback], [scope])
Detach an event handler from an event. If callback is not provided then all callbacks are unbound from the event, if scope is not provided then all events with the callback will be unbound.
var handler = function () {
};
obj.on('test', handler);
obj.off(); // Removes all events
obj.off('test'); // Removes all events called 'test'
obj.off('test', handler); // Removes all handler functions, called 'test'
obj.off('test', handler, this); // Removes all hander functions, called 'test' with scope this
Parameters
| name | string | Name of the event to unbind. |
| callback | pc.callbacks.HandleEvent | Function to be unbound. |
| scope | object | Scope that was used as the this when the event is fired. |
Returns
pc.EventHandlerSelf for chaining.
on(name, callback, [scope])
Attach an event handler to an event.
obj.on('test', function (a, b) {
console.log(a + b);
});
obj.fire('test', 1, 2); // prints 3 to the console
Parameters
| name | string | Name of the event to bind the callback to. |
| callback | pc.callbacks.HandleEvent | Function that is called when event is fired. Note the callback is limited to 8 arguments. |
| scope | object | Object to use as 'this' when the event is fired, defaults to current this. |
Returns
pc.EventHandlerSelf for chaining.
once(name, callback, [scope])
Attach an event handler to an event. This handler will be removed after being fired once.
obj.once('test', function (a, b) {
console.log(a + b);
});
obj.fire('test', 1, 2); // prints 3 to the console
obj.fire('test', 1, 2); // not going to get handled
Parameters
| name | string | Name of the event to bind the callback to. |
| callback | pc.callbacks.HandleEvent | Function that is called when event is fired. Note the callback is limited to 8 arguments. |
| scope | object | Object to use as 'this' when the event is fired, defaults to current this. |
Returns
pc.EventHandlerSelf for chaining.