Engine API Reference - v2.13.0
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    Class Gizmo

    The base class for all gizmos.

    Hierarchy (View Summary)

    Index

    Constructors

    constructor

    Properties

    _app _camera _coordSpace _device _handles _layer _renderUpdate _scale intersectShapes nodes preventDefault root

    Accessors

    camera cameraDir coordSpace enabled facingDir layer size

    Methods

    _updatePosition _updateRotation _updateScale attach destroy detach fire hasEvent off on once prerender update createLayer

    Events

    EVENT_NODESATTACH EVENT_NODESDETACH EVENT_POINTERDOWN EVENT_POINTERMOVE EVENT_POINTERUP EVENT_POSITIONUPDATE EVENT_RENDERUPDATE EVENT_ROTATIONUPDATE EVENT_SCALEUPDATE

    Constructors

    • Creates a new Gizmo object.

      Parameters

      • camera: CameraComponent

        The camera component.

      • layer: Layer

        The render layer. This can be provided by the user or will be created and added to the scene and camera if not provided. Successive gizmos will share the same layer and will be removed from the camera and scene when the last gizmo is destroyed.

      • Optionalname: string = 'gizmo'

        The name of the gizmo. Defaults to 'gizmo'.

      Returns Gizmo

      const gizmo = new pc.Gizmo(camera, layer);

    Properties

    Protected_app

    _app: AppBase

    Internal reference to the app containing the gizmo.

    Protected_camera

    _camera: CameraComponent

    Internal reference to camera component to view the gizmo.

    Protected_coordSpace

    _coordSpace: GizmoSpace = 'world'

    Internal version of coordinate space. Defaults to 'world'.

    Protected_device

    _device: GraphicsDevice

    Internal reference to the graphics device of the app.

    Protected_handles

    _handles: EventHandle[] = []

    Internal list of app event handles for the gizmo.

    Protected_layer

    _layer: Layer

    Internal reference to layer to render the gizmo..

    Protected_renderUpdate

    _renderUpdate: boolean = false

    Internal flag to track if a render update is required.

    Protected_scale

    _scale: number = 1

    Internal version of the gizmo scale. Defaults to 1.

    intersectShapes: Shape[] = []

    The intersection shapes for the gizmo.

    nodes: GraphNode[] = []

    The graph nodes attached to the gizmo.

    preventDefault: boolean = true

    Flag to indicate whether to call preventDefault on pointer events.

    root: Entity

    The root gizmo entity.

    Accessors

    Methods

    Protected_updatePosition

    Protected_updateRotation

    Protected_updateScale

    • Detaches all graph nodes and destroys the gizmo instance.

      Returns void

      const gizmo = new pc.Gizmo(camera, layer);
      gizmo.attach([boxA, boxB]);
      gizmo.destroy();

    • Detaches all graph nodes from the gizmo.

      Returns void

      const gizmo = new pc.Gizmo(camera, layer);
      gizmo.attach([boxA, boxB]);
      gizmo.detach();

    • Fire an event, all additional arguments are passed on to the event listener.

      Parameters

      • name: string

        Name of event to fire.

      • Optionalarg1: any

        First argument that is passed to the event handler.

      • Optionalarg2: any

        Second argument that is passed to the event handler.

      • Optionalarg3: any

        Third argument that is passed to the event handler.

      • Optionalarg4: any

        Fourth argument that is passed to the event handler.

      • Optionalarg5: any

        Fifth argument that is passed to the event handler.

      • Optionalarg6: any

        Sixth argument that is passed to the event handler.

      • Optionalarg7: any

        Seventh argument that is passed to the event handler.

      • Optionalarg8: any

        Eighth argument that is passed to the event handler.

      Returns EventHandler

      Self for chaining.

      obj.fire('test', 'This is the message');

    • Test if there are any handlers bound to an event name.

      Parameters

      • name: string

        The name of the event to test.

      Returns boolean

      True if the object has handlers bound to the specified event name.

      obj.on('test', () => {}); // bind an event to 'test'
      obj.hasEvent('test'); // returns true
      obj.hasEvent('hello'); // returns false

    • 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.

      Parameters

      • Optionalname: string

        Name of the event to unbind.

      • Optionalcallback: HandleEventCallback

        Function to be unbound.

      • Optionalscope: any

        Scope that was used as the this when the event is fired.

      Returns EventHandler

      Self for chaining.

      const handler = () => {};
      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 handler functions, called 'test' with scope this

    • Attach an event handler to an event.

      Parameters

      • name: string

        Name of the event to bind the callback to.

      • callback: HandleEventCallback

        Function that is called when event is fired. Note the callback is limited to 8 arguments.

      • Optionalscope: any = ...

        Object to use as 'this' when the event is fired, defaults to current this.

      Returns EventHandle

      Can be used for removing event in the future.

      obj.on('test', (a, b) => {
          console.log(a + b);
      });
      obj.fire('test', 1, 2); // prints 3 to the console

      const evt = obj.on('test', (a, b) => {
          console.log(a + b);
      });
      // some time later
      evt.off();

    • Attach an event handler to an event. This handler will be removed after being fired once.

      Parameters

      • name: string

        Name of the event to bind the callback to.

      • callback: HandleEventCallback

        Function that is called when event is fired. Note the callback is limited to 8 arguments.

      • Optionalscope: any = ...

        Object to use as 'this' when the event is fired, defaults to current this.

      Returns EventHandle

      • can be used for removing event in the future.
      obj.once('test', (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

    • Pre-render method. This is called before the gizmo is rendered.

      Returns void

      const gizmo = new pc.Gizmo(camera, layer);
      gizmo.attach([boxA, boxB]);
      gizmo.prerender();

    • Updates the gizmo position, rotation, and scale.

      Returns void

      const gizmo = new pc.Gizmo(camera, layer);
      gizmo.attach([boxA, boxB]);
      gizmo.update();

    • Creates a new gizmo layer and adds it to the scene.

      Parameters

      • app: AppBase

        The app.

      • OptionallayerName: string = 'Gizmo'

        The layer name. Defaults to 'Gizmo'.

      • OptionallayerIndex: number = app.scene.layers.layerList.length

        The layer index. Defaults to the end of the layer list.

      Returns Layer

      The new layer.

    Events

    EVENT_NODESATTACH: string = 'nodes:attach'

    Fired when graph nodes are attached.

    const gizmo = new pc.Gizmo(camera, layer);
    gizmo.on('nodes:attach', () => {
        console.log('Graph nodes attached');
    });
    EVENT_NODESDETACH: string = 'nodes:detach'

    Fired when graph nodes are detached.

    const gizmo = new pc.Gizmo(camera, layer);
    gizmo.on('nodes:detach', () => {
        console.log('Graph nodes detached');
    });
    EVENT_POINTERDOWN: string = 'pointer:down'

    Fired when the pointer is down on the gizmo.

    const gizmo = new pc.Gizmo(camera, layer);
    gizmo.on('pointer:down', (x, y, meshInstance) => {
        console.log(`Pointer was down on ${meshInstance.node.name} at ${x}, ${y}`);
    });
    EVENT_POINTERMOVE: string = 'pointer:move'

    Fired when the pointer is moving over the gizmo.

    const gizmo = new pc.Gizmo(camera, layer);
    gizmo.on('pointer:move', (x, y, meshInstance) => {
        console.log(`Pointer was moving on ${meshInstance.node.name} at ${x}, ${y}`);
    });
    EVENT_POINTERUP: string = 'pointer:up'

    Fired when the pointer is up off the gizmo.

    const gizmo = new pc.Gizmo(camera, layer);
    gizmo.on('pointer:up', (x, y, meshInstance) => {
        console.log(`Pointer was up on ${meshInstance.node.name} at ${x}, ${y}`);
    })
    EVENT_POSITIONUPDATE: string = 'position:update'

    Fired when the gizmo's position is updated.

    const gizmo = new pc.Gizmo(camera, layer);
    gizmo.on('position:update', (position) => {
        console.log(`The gizmo's position was updated to ${position}`);
    })
    EVENT_RENDERUPDATE: string = 'render:update'

    Fired when when the gizmo render has updated.

    const gizmo = new pc.TransformGizmo(camera, layer);
    gizmo.on('render:update', () => {
        console.log('Gizmo render has been updated');
    });
    EVENT_ROTATIONUPDATE: string = 'rotation:update'

    Fired when the gizmo's rotation is updated.

    const gizmo = new pc.Gizmo(camera, layer);
    gizmo.on('rotation:update', (rotation) => {
        console.log(`The gizmo's rotation was updated to ${rotation}`);
    });
    EVENT_SCALEUPDATE: string = 'scale:update'

    Fired when the gizmo's scale is updated.

    const gizmo = new pc.Gizmo(camera, layer);
    gizmo.on('scale:update', (scale) => {
        console.log(`The gizmo's scale was updated to ${scale}`);
    });

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