API Docs for:

CameraPathAnimation

A CameraPathAnimation animates the Scene's Camera along a CameraPath.

Examples

Usage

Interpolating the Camera along a path

In this example we'll use the CameraPathAnimation's play method to smoothly interpolate the Scene's Camera along a CameraPath:

// Load a model from glTF

var gearbox = new xeogl.GLTFModel({
        src: "models/gltf/GearboxAssy/glTF-MaterialsCommon/GearboxAssy.gltf"
});

// Define a CameraPath

var cameraPath = new xeogl.CameraPath({
    frames: [
        {t: 0, eye: [184.21, 10.54, -7.03], look: [159.2, 17.02, 3.21], up: [-0.15, 0.97, 0.13]},
        {t: 1, eye: [184.91, 10.10, -11.26], look: [171.03, 13.69, -5.57], up: [-0.15, 0.97, 0.12]},
        {t: 2, eye: [181.37, 12.35, -16.93], look: [171.03, 13.69, -5.57], up: [-0.17, 0.93, 0.28]},
        {t: 2, eye: [174.01, 13.55, -20.70], look: [171.03, 13.69, -5.57], up: [-0.01, 0.90, 0.40]},
        {t: 4, eye: [166.48, 14.36, -20.30], look: [171.03, 13.69, -5.57], up: [0.19, 0.88, 0.40]},
        {t: 5, eye: [160.32, 14.69, -16.63], look: [171.03, 13.69, -5.57], up: [0.36, 0.87, 0.29]},
        {t: 6, eye: [156.67, 17.97, -4.77], look: [162.53, 17.42, 1.28], up: [0.36, 0.87, 0.29]},
        {t: 7, eye: [151.14, 16.68, -10.04], look: [158.94, 15.95, -1.99], up: [0.36, 0.87, 0.29]},
        {t: 8, eye: [146.26, 17.56, -4.77], look: [152.13, 17.05, 1.28], up: [0.36, 0.87, 0.28]},
        {t: 9, eye: [137.26, 18.36, -9.65], look: [149.76, 17.27, 3.24], up: [0.36, 0.87, 0.28]},
        {t: 10, eye: [139.04, 18.29, -11.17], look: [149.76, 17.27, 3.24], up: [0.32, 0.87, 0.33]},
        {t: 11, eye: [140.66, 18.13, -12.26], look: [149.76, 17.27, 3.24], up: [0.28, 0.87, 0.35]},
        {t: 12, eye: [147.18, 17.66, -14.56], look: [149.76, 17.27, 3.24], up: [0.12, 0.89, 0.41]},
        {t: 13, eye: [158.05, 16.33, -12.69], look: [149.76, 17.27, 3.24], up: [-0.11, 0.91, 0.34]},
        {t: 14, eye: [150.11, 13.26, -6.69], look: [147.95, 13.50, -2.52], up: [-0.11, 0.91, 0.34]},
        {t: 15, eye: [149.27, 13.00, -3.34], look: [148.72, 13.05, -2.29], up: [-0.11, 0.91, 0.35]},
        {t: 16, eye: [152.62, 11.65, -4.87], look: [148.47, 12.08, 3.08], up: [-0.11, 0.91, 0.35]},
        {t: 17, eye: [153.35, 12.24, -1.84], look: [148.69, 12.72, 7.01], up: [-0.11, 0.91, 0.35]},
        {t: 18, eye: [156.49, 12.11, 0.74], look: [148.69, 12.72, 7.012], up: [-0.23, 0.92, 0.26]},
        {t: 19, eye: [158.52, 11.98, 5.21], look: [148.69, 12.72, 7.01], up: [-0.32, 0.92, 0.12]},
        {t: 20, eye: [158.60, 11.50, 7.91], look: [148.69, 12.72, 7.01], up: [-0.30, 0.94, 0.035]},
        {t: 21, eye: [157.60, 11.76, 11.51], look: [148.69, 12.72, 7.01], up: [-0.31, 0.93, -0.089]},
        {t: 22, eye: [152.67, 18.35, 14.29], look: [148.69, 12.72, 7.01], up: [-0.46, 0.51, -0.70]},
        {t: 23, eye: [148.79, 21.67, 11.52], look: [148.69, 12.72, 7.01], up: [-0.15, 0.036, -0.97]},
        {t: 24, eye: [147.11, 22.40, 9.07], look: [148.69, 12.72, 7.01], up: [0.38, -0.16, -0.89]},
        {t: 25, eye: [144.80, 21.92, 6.23], look: [148.69, 12.72, 7.01], up: [0.98, -0.02, 0.03]},
        {t: 26, eye: [144.11, 20.18, 2.13], look: [148.69, 12.72, 7.01], up: [0.71, 0.29, 0.62]},
        {t: 27, eye: [145.87, 17.37, -1.40], look: [148.69, 12.72, 7.01], up: [0.31, 0.60, 0.71]},
        {t: 28, eye: [144.37, 19.17, -7.33], look: [146.13, 16.27, -2.08], up: [0.31, 0.60, 0.71]},
        {t: 29, eye: [142.54, 21.91, -17.26], look: [146.89, 14.81, -4.28], up: [0.31, 0.60, 0.71]}
    ]
});

// Once the model has loaded, animate the
// (default Scene's default Camera) along the CameraPath

var cameraPathAnimation = new xeogl.CameraPathAnimation({
    cameraPath: cameraPath
});

gearbox.on("loaded", function () {
    cameraPathAnimation.play();
});


Flying directly to each frame on a path

In this example, we'll use the CameraPathAnimation's flyToFrame method to fly the Camera directly to each frame on the CameraPath:

var i = 0;
var dir = 1;

gearbox.on("loaded", function () {
    function nextFrame() {
        cameraPathAnimation.flyToFrame(i += dir, function() { setTimeout(nextFrame, 1000); });

        if (i <= 0 || i >= 29) {
            dir = -dir;
        }
    }
    nextFrame();
});


Jumping directly to each frame on a path

In this example, we'll use the CameraPathAnimation's scrubToFrame method to jump the Camera directly to each frame on the CameraPath:

var i = 0;
var dir = 1;

gearbox.on("loaded", function () {
    function nextFrame() {
        cameraPathAnimation.scrubToFrame(i += dir);

        if (i <= 0 || i >= 29) {
            dir = -dir;
        }
        setTimeout(nextFrame, 1000);
    }
    nextFrame();
});

Constructor

CameraPathAnimation

(
  • [scene]
  • [cfg]
)

Parameters:

  • [scene] Scene optional

    Parent Scene.

  • [cfg] optional

    Configuration

    • [id] String optional

      Optional ID, unique among all components in the parent Scene, generated automatically when omitted.

    • [meta] String:Object optional

      Optional map of user-defined metadata to attach to CameraPathAnimation.

    • [cameraPath] Number | String | CameraPath optional

      ID or instance of a CameraPath to animate the Camera along. Must be within the same Scene as CameraPathAnimation. .

Methods

create

(
  • [cfg]
)

Convenience method for creating a Component within this Component's Scene.

The method is given a component configuration, like so:

var material = myComponent.create({
     type: "xeogl.PhongMaterial",
     diffuse: [1,0,0],
     specular: [1,1,0]
}, "myMaterial");

Parameters:

  • [cfg] optional

    Configuration for the component instance.

Returns:

:

destroy

()

Destroys this component.

Fires a destroyed event on this Component.

Automatically disassociates this component from other components, causing them to fall back on any defaults that this component overrode on them.

TODO: describe effect with respect to #create

error

(
  • message
)

Logs an error for this component to the JavaScript console.

The console message will have this format: [ERROR] [<component type> =<component id>: <message>

Also fires the message as an error event on the parent Scene.

Parameters:

  • message String

    The message to log

fire

(
  • event
  • value
  • [forget=false]
)

Fires an event on this component.

Notifies existing subscribers to the event, optionally retains the event to give to any subsequent notifications on the event as they are made.

Parameters:

  • event String

    The event type name

  • value Object

    The event parameters

  • [forget=false] Boolean optional

    When true, does not retain for subsequent subscribers

flyToFrame

(
  • frameIdx
  • [ok]
)

Flies this CameraPathAnimation's Camera to the time at the given frame.

Parameters:

  • frameIdx Number

    Index of the frame to play to.

  • [ok] Function optional

    Callback to fire when playing is complete.

hasSubs

(
  • event
)
Boolean

Returns true if there are any subscribers to the given event on this component.

Parameters:

  • event String

    The event

Returns:

Boolean:

True if there are any subscribers to the given event on this component.

isType

(
  • type
)
Boolean

Tests if this component is of the given type, or is a subclass of the given type.

The type may be given as either a string or a component constructor.

This method works by walking up the inheritance type chain, which this component provides in property Component/superTypes:property, returning true as soon as one of the type strings in the chain matches the given type, of false if none match.

Examples:

var myRotate = new xeogl.Rotate({ ... });

myRotate.isType(xeogl.Component); // Returns true for all xeogl components
myRotate.isType("xeogl.Component"); // Returns true for all xeogl components
myRotate.isType(xeogl.Rotate); // Returns true
myRotate.isType(xeogl.Transform); // Returns true
myRotate.isType("xeogl.Transform"); // Returns true
myRotate.isType(xeogl.Mesh); // Returns false, because xeogl.Rotate does not (even indirectly) extend xeogl.Mesh

Parameters:

  • type String | Function

    Component type to compare with, eg "xeogl.PhongMaterial", or a xeogl component constructor.

Returns:

Boolean:

True if this component is of given type or is subclass of the given type.

log

(
  • message
)

Logs a console debugging message for this component.

The console message will have this format: [LOG] [<component type> <component id>: <message>

Also fires the message as a log event on the parent Scene.

Parameters:

  • message String

    The message to log

off

(
  • subId
)

Cancels an event subscription that was previously made with Component#on() or Component#once().

Parameters:

  • subId String

    Publication subId

on

(
  • event
  • callback
  • [scope=this]
)
String

Subscribes to an event on this component.

The callback is be called with this component as scope.

Parameters:

  • event String

    The event

  • callback Function

    Called fired on the event

  • [scope=this] Object optional

    Scope for the callback

Returns:

String:

Handle to the subscription, which may be used to unsubscribe with {@link #off}.

once

(
  • event
  • callback
  • [scope=this]
)

Subscribes to the next occurrence of the given event, then un-subscribes as soon as the event is subIdd.

This is equivalent to calling Component#on(), and then calling Component#off() inside the callback function.

Parameters:

  • event String

    Data event to listen to

  • callback Function(data)

    Called when fresh data is available at the event

  • [scope=this] Object optional

    Scope for the callback

play

()

Begins playing this CameraPathAnimation from the current time.

playToFrame

(
  • frameIdx
)

Begins playing this CameraPathAnimation from the current time to the time at the given frame.

Parameters:

  • frameIdx Number

    Index of the frame to play to.

playToT

(
  • t
)

Begins playing this CameraPathAnimation from the current time to the given time.

Parameters:

  • t Number

    Time instant.

scrubToFrame

(
  • frameIdx
)

Scrubs this CameraPathAnimation to the given frame.

Parameters:

  • frameIdx Number

    Index of the frame to scrub to.

scrubToT

(
  • t
)

Scrubs (sets) this CameraPathAnimation to the the given time.

Parameters:

  • t Number

    Time instant.

stop

()

Stops playing this CameraPathAnimation.

warn

(
  • message
)

Logs a warning for this component to the JavaScript console.

The console message will have this format: [WARN] [<component type> =<component id>: <message>

Also fires the message as a warn event on the parent Scene.

Parameters:

  • message String

    The message to log

Properties

cameraPath

CameraPath

The CameraPath for this CameraPathAnimation.

Fires a CameraPathAnimation/cameraPath:event event on change.

destroyed

Boolean

True as soon as this Component has been destroyed

id

String final

Unique ID for this Component within its parent Scene.

metadata

Object

Arbitrary, user-defined metadata on this component.

model

Model final

The Model which contains this Component, if any.

Will be null if this Component is not in a Model.

rate

Number

The rate at which this CameraPathAnimation plays.

scene

Scene final

The parent Scene that contains this Component.

type

String final

JavaScript class name for this Component.

For example: "xeogl.AmbientLight", "xeogl.MetallicMaterial" etc.

Events

destroyed

Fired when this Component is destroyed.