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Initialization and options Examples

Viewer API

General

addEventListener( event, callback )

Adds a listener function to an event.

The callback parameters depend on the event. See Events.

(Interactive Sample)

api.addEventListener('viewerready', function() {
    window.console.log('Viewer ready');
});

load( [callback] )

Pre-loads the model before starting the viewer.

The callback has no parameters.

api.load(function() {
    window.console.log('Viewer loaded');
});

start( [callback] )

Starts the model viewer.

The callback has no parameters.

(Interactive Sample)

api.start(function() {
    window.console.log('Viewer started');
});

stop( [callback] )

Stops the model viewer.

The callback has no parameters.

(Interactive Sample)

api.stop(function() {
    window.console.log('Viewer stopped');
});

getScreenShot( [w, h], [mimetype], [callback] )

Takes a screenshot of the viewer.

  • w is the width of the screenshot (a number, in pixels).
  • h is the height of the screenshot (a number, in pixels).
  • mimetype is the extension of the image file (a MIME type string, 'image/jpeg' by default).

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is a base64 encoded image.

Valid function signatures are:

  • getScreenShot([callback])
  • getScreenShot(w, h, [callback])
  • getScreenShot(w, h, mimetype, [callback])
  • getScreenShot(mimetype, [callback])

(Interactive Sample)

api.getScreenShot('image/png', function(err, result) {
    if (!err) {
        window.console.log(result); // 'data:image/png;base64,iVBORw0KG...'
    }
});

pickColor( position2D, [callback] )

Returns the color of the pixel in the 3D viewer for the given screen coordinates.

position2D is an array of x and y coordinates.

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is a normalized RGBA array.
api.pickColor([x, y], function(err, color) {
    if (!err) {
        window.console.log(result); // [1, 1, 1, 0]
    }
});

getWorldToScreenCoordinates( worldCoord, [callback] )

Returns the screen coordinates for the given world coordinates.

worldCoord is an array of x, y, z coordinates.

The callback has one parameter, a JSON object with the following attributes:

  • glCoord: coordinates in the gl viewport (y origin at bottom) with pixel ratio taken into account
  • canvasCoord: coordinates in the canvas html element (y origin at top)

(Interactive Sample)

api.getWorldToScreenCoordinates(worldCoord, function(coord) {
    window.console.log(coord.glCoord, coord.canvasCoord); // [x, y] [x, y]
});

Easing functions

Easing functions specify the rate of change of a parameter over time. This is an optional parameter in various functions, such as those that move the camera or translate objects.

Easing can be one of these keywords:

  • easeLinear
  • easeOutQuad
  • easeInQuad
  • easeInOutQuad
  • easeOutCubic
  • easeInCubic
  • easeInOutCubic
  • easeOutQuart
  • easeInQuart
  • easeInOutQuart
  • easeOutQuintic
  • easeInQuintic
  • easeInOutQuintic
  • easeOutSextic
  • easeInSextic
  • easeInOutSextic
  • easeOutSeptic
  • easeInSeptic
  • easeInOutSeptic
  • easeOutOctic
  • easeInOctic
  • easeInOutOctic
  • easeOutBack
  • easeInBack
  • easeInOutBack
  • easeOutCircle
  • easeInCircle
  • easeInOutCircle
  • easeOutElastic
  • easeInElastic
  • easeInOutElastic
  • easeOutBounce
  • easeInBounce
  • easeInOutBounce

The default easing function is easeOutQuad.

Check out easings.net to see interactive examples of easing functions.

(Interactive Sample)

Background

setBackground( options, [callback] )

Sets a background image or color in the viewer.

The image must exist as a background on the account of the owner of the model.

options is an object that defines one of the following parameters of the background:

  • uid: the UID of the background, a string
  • color: a normalized RGB array, [R, G, B]
  • transparent: a boolean (true makes the background transparent)

In order to use a transparent background, you must set transparent: 1 in the client.init options. Otherwise, the background will appear black. A Pro account or above is required to use this option.

A background image must already be uploaded to your account and available in 3D Settings.

You can find the correct options in the Sketchfab model’s “3D Settings”. If you add ?api_log=1 to the URL (e.g. https://sketchfab.com/models/442c548d94744641ba279ae94b5f45ec/edit?api_log=1), various data will be printed to your browser’s developer tool console.

The callback has no parameters.

(Interactive Sample)

// Sets a color background
api.setBackground({color: [0, 0, 0]}, function() {
    window.console.log('Background changed');
});

// Sets an image background
api.setBackground({uid: '51af6a870cce449eb75b0345feebaebb'}, function() {
    window.console.log('Background changed');
});

// Sets transparent background (assuming client.init options include transparent: 1)
api.setBackground({transparent: true}, function() {
    window.console.log('Background changed');
});

Environment

getEnvironment( [callback] )

Returns infomation about the HDR environment in the viewer.

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is a environment JSON object with the following attributes:
    • enabled: a boolean that indicates whether or not environmental lighting is enabled
    • exposure: the overall brightness of the environment, which affects the lighting and the background if enabled (a number)
    • lightIntensity: the intensity of the environmental light when casting shadows (a number)
    • rotation: the rotation of the environment (a number, in radians)
    • shadowEnabled: a boolean that indicates whether or not the environment is casting shadows

(Interactive Sample)

api.getEnvironment(function(err, envInfo) {
    if (!err) {
        window.console.log('Current environment:', envInfo);
    }
});

setEnvironment( options, [callback] )

Sets the HDR environment of the viewer.

The environment must exist on the account of the owner of the model. options is an object that defines the environment and its settings.

You can find the correct options in the Sketchfab model’s “3D Settings”. If you add ?api_log=1 to the URL (e.g. https://sketchfab.com/models/442c548d94744641ba279ae94b5f45ec/edit?api_log=1), various data will be printed to your browser’s developer tool console.

The callback has no parameters.

(Interactive Sample)

api.setEnvironment({
    uid: '3a68a92a99d849b19829e315b93e6d55',
    exposure: 0.2,
    lightIntensity: 1.0,
    rotation: 0.75,
    blur: 0.1,
    shadowEnabled: true
}, function() {
    window.console.log('Environment changed');
});

Selection

setHighlightOptions( options, [callback] )

Sets the material highlight options used by highlightMaterial.

options is a JSON object with the following attributes:

  • outlineWidth: the width of the outline (a number, in pixels)
  • outlineColor: the color of the outline (a normalized RGBA array, [R, G, B, A])
  • outlineDuration: the duration the outline should be displayed (a number, in seconds; 0 for no outline)
  • highlightColor: the color of the highlight (a normalized RGB array, [R, G, B, A])
  • highlightDuration: the duration the highlight should be displayed (a number, in seconds; 0 for no highlight)

The callback has no parameters.

(Interactive Sample)

api.setHighlightOptions({
    outlineWidth: 5,
    outlineColor: [1.0, 0.0, 0.0],
    outlineDuration: 200,
    highlightColor: [0.0, 1.0, 0.0],
    highlightDuration: 300
}, function() {
    window.console.log('Set highlight options');
});

highlightMaterial( material )

Highlights the given material providing the options set with setHighlightOptions.

material is a material object which can be fetched with getMaterialList, or returned by a click event.

api.highlightMaterial(material);

AR

startAR( [callback] )

Displays the AR popup if available. See App-free AR for Enterprise

The callback has one parameter: an error or null if the operation succeeded.

api.startAR(function(err) {
    if (!err) {
        window.console.log('Starting AR');
    }
});

Camera

(Interactive Sample)

getCameraLookAt( [callback] )

Returns the current camera position and target.

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is a camera JSON object with the following attributes:
    • position: an array of the x, y, and z coordinates of the camera position
    • target: an array of the x, y, and z coordinates of the camera target
api.getCameraLookAt(function(err, camera) {
    window.console.log(camera.position); // [x, y, z]
    window.console.log(camera.target); // [x, y, z]
});

setCameraLookAt( position, target, [duration], [callback] )

Sets the camera position and target.

  • postion is the position of the camera (an array of x, y, and z coordinates)
  • target is the target of the camera (an array of x, y, and z coordinates)
  • duration is the duration of the move from the current camera to the new camera (a number, in seconds; 2 by default)

The callback has one parameter: an error or null if the operation succeeded.

The callback is invoked at the start of the camera move. Use setCameraLookAtEndAnimationCallback to set a callback at the end of the camera move.

(Interactive Sample)

api.setCameraLookAt([0, 13, 10], [0, 10, 0], 4.3, function(err) {
    if (!err) {
        window.console.log('Camera moved');
    }
});

recenterCamera( [callback] )

Centers the camera around the model’s bounding box, taking portrait/landscape mode into account.

Camera constraints should be disabled before recentering the camera.

The callback has one parameter: an error or null if the operation succeeded.

api.recenterCamera(function(err) {
    if (!err) {
        window.console.log('Camera recentered');
    }
});

focusOnVisibleGeometries( [callback] )

Centers the camera around the model’s visible geometries, taking portrait/landscape mode into account.

Camera constraints should be disabled before recentering the camera.

The callback has one parameter: an error or null if the operation succeeded.

api.focusOnVisibleGeometries(function(err) {
    if (!err) {
        window.console.log('Camera recentered');
    }
});

setCameraEasing( easing )

Sets camera animation easing.

easing can be one of the keywords in the easing list.

api.setCameraEasing('easeLinear');

setCameraConstraints( options )

Defines camera constraint settings.

options is a JSON object of camera constraint settings.

You can find the correct options in the Sketchfab model’s “3D Settings”. If you add ?api_log=1 to the URL (e.g. https://sketchfab.com/models/442c548d94744641ba279ae94b5f45ec/edit?api_log=1), various data will be printed to your browser’s developer tool console.

The callback has one parameter: an error or null if the operation succeeded.

api.setCameraConstraints(options, function(err) {
    if (!err) {
        window.console.log('Set camera constraints');
    }
});

setEnableCameraConstraints( enable, options )

Enables or disables camera constraints defined by setCameraConstraints.

  • enable is a boolean (true to enable constraints, false to disable constraints)
  • optionsis a JSON object with a single attribute: preventCameraConstraintsFocus. If true, the camera will not move when constraints are enabled (for example, if the current camera position is outside the given constraints).

The callback has one parameter: an error or null if the operation succeeded.

api.setEnableCameraConstraints(true, {preventCameraConstraintsFocus: true}, function(err) {
    if (!err) {
        window.console.log('Camera constraints enabled');
    }
});

setUserInteraction ( enable )

Enables or disables user interaction with the viewer.

This is useful if you need to move the camera somewhere without the end user moving the camera during the animation. For example, you might need to take a screenshot from a very specfic position.

The callback has one parameter: an error or null if the operation succeeded.

api.setUserInteraction(false, function(err) {
    if (!err) {
        window.console.log('User interaction disabled');
    }
});

setCameraLookAtEndAnimationCallback( callback )

Creates an event listener for a camera animation. The callback is invoked when the camera stops moving, and the event is consumed.

The callback has one parameter: an error or null if the operation succeeded.

api.setCameraLookAtEndAnimationCallback(function(err) {
    if (!err) {
        window.console.log('Camera animation ended.');
    }
});

setFov( angle, [callback] )

Defines the camera field of view (FoV).

angle is the angle to set as the FoV (a number, in degrees, between 1 and 179).

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is the angle set by the operation.
api.setFov(60, function(err, angle) {
    if (!err) {
        window.console.log('FOV set to', angle); // 45
    }
});

getFov( [callback] )

Returns the camera’s current field of view (FoV).

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is the camera’s FoV angle, in degrees.
api.getFov(function(err, fov) {
    if (!err) {
        window.console.log('FOV is', fov); // 45
    }
});

Objects

Objects in the scene are represented as nodes in a scene graph.

getNodeMap( [callback] )

Returns the list of nodes in the scene.

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is a flattened array of node objects.

(Interactive Sample)

api.getNodeMap(function(err, nodes) {
    if (!err) {
        window.console.log(nodes); // [ ... ]
    }
});

getSceneGraph( [callback] )

Returns the scene graph.

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is the scene graph.
api.getSceneGraph(function(err, graph) {
    if (!err) {
      window.console.log(graph); // { ... }
    }
});

show( instanceID, [callback] )

Shows a node.

instanceID is the ID of the node, which can be found via getNodeMap or getSceneGraph.

The callback has one parameter: an error or null if the operation succeeded.

(Interactive Sample)

api.show(myNode, function(err) {
    if (!err) {
        window.console.log('Showed node', myNode); // 114
    }
});

hide( instanceID, [callback] )

Hides a node.

instanceID is the ID of the node, which can be found via getNodeMap or getSceneGraph.

The callback has one parameter: an error or null if the operation succeeded.

(Interactive Sample)

api.hide(myNode, function(err) {
    if (!err) {
        window.console.log('Hid node', myNode); // 114
    }
});

translate( instanceID, translateTo, options, [callback] )

Translates a node.

  • instanceID is the ID of the node, which can be found via getNodeMap or getSceneGraph.
  • translateTo is an array containing 3D coordinates to translate to, [x, y, z].
  • options is a JSON object with the following attributes:
    • duration: the duration of the translation animation (a number, in seconds; 0 by default)
    • easing: one of the keywords in the easing list

Only MatrixTransform nodes can be translated.

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is translateTo.
api.translate(myNode, [1, 1, 1], {
    duration: 1.0,
    easing: 'easeOutQuad'
}, function(err, translateTo) {
    if (!err) {
        window.console.log('Object has been translated to', translateTo);
    }
});

rotate( instanceID, rotateTo, options, [callback] )

Rotates a node.

  • instanceID is the ID of the node, which can be found via getNodeMap or getSceneGraph.
  • rotateTo an array containing [ radAngle, axisX, axisY, axisZ ].
  • options is a JSON object with the following attributes:
    • duration: the duration of the translation animation (a number, in seconds; 0 by default)
    • easing: one of the keywords in the easing list

Only MatrixTransform nodes can be rotated.

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is rotateTo.
api.rotate(myNode, [Math.PI, 1, 0, 0], {
    duration: 1.0,
    easing: 'easeOutQuad'
}, function(err, rotateTo) {
    if (!err) {
        window.console.log('Object has been rotated according to', rotateTo);
    }
});

getMatrix( instanceID, [callback] )

Returns the transform matrix for a given node.

instanceID is the ID of the node, which can be found via getNodeMap or getSceneGraph.

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is the returned matrix.

We recommend the use of glMatrix for matrix operations. The transform matrix is column-major. This means that indices 12, 13 , and 14 (assuming a starting index of 0) in the transform matrix are responsible for translation.

api.getMatrix(myNode, function(err, matrix) {
    if (!err) {
        window.console.log('Matrix:', matrix);
    }
});

setMatrix( instanceID, matrix, [callback] )

Sets the transform matrix for a given node.

  • instanceID is the ID of the node, which can be found via getNodeMap or getSceneGraph.
  • matrix is the transform matrix to set on the node.

The callback has one parameter: an error or null if the operation succeeded.

*setMatrix* is performed in local space (relative to parent).

We recommend the use of glMatrix for matrix operations. The transform matrix is column-major. This means that indices 12, 13 , and 14 (assuming a starting index of 0) in the transform matrix are responsible for translation.

api.setMatrix(myNode, [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15], function() {
    if (!err) {
        window.console.log('Matrix set');
    }
});

pickFromScene( position3DStart, position3DEnd, [callback] )

Casts a ray between two 3D positions and returns information about the world position of the first hit (intersection).

  • position3DStart is an array of 3D coordinates [x, y, z] of the first position.
  • position3DEnd is an array of 3D coordinates [x, y, z] of the second position.

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is a world position JSON object with the following attributes:
    • position3D: the 3D coordinates in the scene (an array, [x, y, z])
    • position2D: the coordinates in the 2D gl viewport with pixel ratio taken into account (an array [z, y], y origin at bottom)
    • normal: normal vector of triangle intersected (an array, [x, y, z])
    • instanceID: picked node ID (a number)
    • material: picked material (JSON object)

(Interactive Sample)

api.pickFromScene(position2D, function(err, coord) {
    if (!err) {
        window.console.log(coord.position3D, coord.position2D, coord.normal, coord.instanceID, coord.material);
    }
});

pickFromScreen( position2D, [callback] )

Returns information about the world position of the first hit (intersection) at a given screen coordinate.

position2D is the coordinates in the 2D gl viewport with pixel ratio taken into account (an array [z, y], y origin at bottom)

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is a world position JSON object with the following attributes:
    • position3D: the 3D coordinates in the scene (an array, [x, y, z])
    • normal: normal vector of triangle intersected (an array, [x, y, z])
    • instanceID: picked node ID (a number)
    • material: picked material (JSON object)

(Interactive Sample)

api.pickFromScreen(position2D, function(err, coord) {
    if (!err) {
        window.console.log(coord.position3D, coord.normal, coord.instanceID, coord.material);
    }
});

Materials & Textures

getMaterialList( [callback] )

Returns the list of materials.

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is an array of material JSON objects.

(Interactive Sample)

api.getMaterialList(function(err, materials) {
    if (!err) {
        window.console.log(materials);
    }
});

setMaterial( material, [callback] )

Updates a material identified by its stateSetID.

material is a material JSON object, identified by its stateSetID attribute and includes any desired changes to material channels.

The callback has no parameters.

(Interactive Sample)

api.getMaterialList(function(err, materials) {
    // Turn off the diffuse on the first material
    var materialToUpdate = materials[0];
    materialToUpdate.channels.DiffuseColor.enable = false;
    window.console.log(materialToUpdate);

    // Apply the change
    api.setMaterial(materialToUpdate, function() {
        window.console.log('Material updated');
    });
});

createMaterial( materialData, [callback] )

Creates a new material from given material data.

materialData is a material JSON object. Use the getMaterialList function to retrieve the existing materials.

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is the new material object.
api.createMaterial({
    channels: {
        AlbedoPBR: {
            color: [1.0, 0.0, 0.0]
        }
    }
}, function(err, material) {
    if (!err) {
        window.console.log(material);
    }
});

assignMaterial( node, materialID, [callback] )

Assigns a material to a node.

  • node is a node object (NOT the instanceID of a node), which can be found via getNodeMap or getSceneGraph.
  • materialID is the ID of a material, which can be identified by its id key via getMaterialList or createMaterial.

The callback has one parameter: an error or null if the operation succeeded.

api.assignMaterial(myNode, myMaterialID, function(err) {
    if (!err) {
        window.console.log('Material assigned');
    }
});

createDecal( decalData, [callback] )

Creates a decal. This works by projecting a new geometry with its own material onto the surface of an existing geometry.

decalData is a decal JSON object.

The minimal data to create a decal are:

  • position the 3D coordinates of the center of the decal (an array, [x, y, z])
  • normal: normal vector of the surface to project the decal onto (an array, [x, y, z])
  • scale: the size of the projection box used to create the decal. x and y define the width and height of the decal, respectively. z defines the depth of the projection and can be used to limit the area of the decal. (an array, [x, y, z])

Optional data when creating a decal are:

  • materialID: the ID of a material to use on the decal. Without this, the decal will be created with a new material.
  • useBaseNormalMap: if set to true, the decal’s material will use the normal map of the underlying base mesh’s material.

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is the new decal object.
api.createDecal(decalData, function(err, decal) {
    if (!err) {
        window.console.log(decal);
    }
});

destroyDecal( decalID, options, [callback] )

Destroys a previously created decal.

  • decalID: the ID of the decal to destroy. It is retrieved as decal.id via createDecal.
  • options is a JSON object with the following attribute:
    • deleteMaterial: a boolean; true will delete the material associated with the destroyed decal

The callback has one parameter: an error or null if the operation succeeded.

api.destroyDecal(decalID, options, function(err) {
    if (!err) {
        window.console.log('Decal destroyed');
    }
});

Material channels

The following material channels are available:

  • AOPBR
  • AlbedoPBR (“Base Color” in the Metalness PBR workflow)
  • Anisotropy
  • BumpMap
  • CavityPBR
  • ClearCoat
  • ClearCoatNormalMap
  • ClearCoatRoughness
  • DiffuseColor
  • DiffuseIntensity
  • DiffusePBR (“Albedo” in the Specular PBR workflow)
  • Displacement
  • EmitColor
  • GlossinessPBR
  • Matcap
  • MetalnessPBR
  • NormalMap
  • Opacity
  • RoughnessPBR
  • SpecularColor
  • SpecularF0
  • SpecularHardness
  • SpecularPBR
  • SubsurfaceScattering
  • SubsurfaceTranslucency

They can be edited as JSON objects using the setMaterial function. Their exact attributes depend on the specific channel and texture options.

getTextureList( [callback] )

Returns the list of registered textures.

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is an array of texture JSON objects.

(Interactive Sample)

api.getTextureList(function(err, textures) {
    if (!err) {
        window.console.log(textures);
    }
});

addTexture( textureURL, [callback] )

Registers a new texture to the texture list.

textureURL is a URL of a CORS-enabled image file or a HTMLCanvasElement Data URI DOMString. The file format must be natively supported by the web browser.

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is the UID string of the new texture, which can now be used in setMaterial.

For information on CORS, visit the MDN Web Docs. For details on implementing CORS on your own server, visit enable-cors.org.

For information on the HTMLCanvasElement interface, visit the MDN Web Docs.

(Interactive Sample)

api.addTexture('https://example.org/texture.png', function(err, textureUid) {
    if (!err) {
        window.console.log('New texture registered with UID', textureUid);
    }
});

addVideoTexture( textureURL, options, [callback] )

(Interactive Sample)

Registers a new video texture.

  • textureURL is a URL of a CORS-enabled video file. The file format must be natively supported by the web browser.
  • options is a JSON object with the following attributes:
    • loop: a boolean; true will make the video loop
    • mute: a boolean; true will play the video with audio muted. This is useful to avoid blocking autoplay in browsers.

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is the UID string of the new texture, which can now be used in setMaterial.

For information on CORS, visit the MDN Web Docs. For details on implementing CORS on your own server, visit enable-cors.org.

(Interactive Sample)

api.addTexture('https://example.org/video.mp4', {
    loop: false,
    mute: true
}, function(err, textureUid) {
    if (!err) {
        window.console.log('Added video texture with UID', textureUid);
    }
});

updateTexture( textureURL, textureUid, [callback] )

Replaces a previously registered texture.

  • textureURL is is a URL to a CORS-enabled image file or a HTMLCanvasElement Data URI DOMString. See addTexture for more details.
  • textureUid is the UID of the texture to replace.

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is the UID string of the new texture, which can now be used in setMaterial.

The new UID will be the same as the previously registered texture’s UID. This replaces the texture everywhere it is used in the model.

api.updateTexture('https://example.org/texture.png', textureUid, function(err, textureUid) {
    if (!err) {
        window.console.log('Replaced texture with UID', textureUid);
    }
});

setTextureQuality( quality, [callback] )

Sets the texture quality used for all the textures in the viewer.

quality must be one of three options:

  • 'ld' (low definition)
  • 'sd' (standard definition)
  • 'hd' (high definition)

The callback has one parameter: an error or null if the operation succeeded.

api.setTextureQuality('hd', function(err) {
    if (!err) {
        window.console.log('Texture quality set to high definition');
    }
});

setUVOffset( materialToUpdate, channel, offsetX, offsetY, [callback] )

Sets an offset for the texture coordinates of the given channel for the given material.

  • materialToUpdate is a material JSON object, identified by its stateSetID attribute.
  • channel can be one of the keywords in the channel list.
  • offsetX is the offset for the UV’s x direction (a number; 0 is no offset, 1 is 100% offset).
  • offsetY is the offset for the UV’s y direction (a number; 0 is no offset, 1 is 100% offset).

The callback has one parameter: an error or null if the operation succeeded.

(Interactive Sample)

api.setUVOffset(materialToUpdate, 'AlbedoPBR', 0, 0.5);

setUVRotation( materialToUpdate, channel, rotation, [callback] )

Sets a rotation for the texture coordinates of the given channel for the given material.

  • materialToUpdate is a material JSON object, identified by its stateSetID attribute.
  • channel can be one of the keywords in the channel list.
  • rotation is the rotation angle (a number, in radians).

The callback has one parameter: an error or null if the operation succeeded.

(Interactive Sample)

api.setUVRotation(materialToUpdate, 'AlbedoPBR', Math.PI/2);

setUVScale( materialToUpdate, channel, scaleX, scaleY, [callback] )

Sets a scale factor for the texture coordinates of the given channel for the given material.

  • materialToUpdate is a material JSON object, identified by its stateSetID attribute.
  • channel can be one of the keywords in the channel list.
  • offsetX is the scale factor for the UV’s x direction (a number).
  • offsetY is the scale factor for the UV’s y direction (a number).

The callback has one parameter: an error or null if the operation succeeded.

(Interactive Sample)

api.setUVScale(materialToUpdate, 'AlbedoPBR', 0.5, 2);

Post Processing Filters

Post-processing filters are visual filters that are applied at the end of rendering. They work like Instagram or Photoshop filters, and let you adjust the look of the final image. * getPostProcessing * setPostProcessing

getPostProcessing( [callback] )

Gets the current post-processing filter settings.

The callback has one parameter: a JSON object of post-processing settings.

api.getPostProcessing(function(settings) {
    window.console.log(settings);
});

setPostProcessing( settings, [callback] )

Sets post-processing filters with new settings.

settings is a JSON object of post-processing filter settings. You can find the format of this object with getPostProcessing.

The callback has no parameters.

// Enable post-processing filters and sharpen filter
api.setPostProcessing({
    enable: true,
    sharpenEnable: true
}, function() {
    window.console.log('Post-processing filters set');
});

Annotations

Annotations are notes positioned in 3D space. They allow authors to provide information on a specific part of the model and tell a story.

getAnnotationList( [callback] )

Gets the current list of annotations in the viewer.

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is an array of annotation objects.
api.getAnnotationList(function(err, annotations) {
    if (!err) {
        window.console.log(annotations);
    }
});

gotoAnnotation( index, options, [callback] )

Selects the annotation for the given index. By default, the camera will move and this move will be animated. Annotation indices are zero-based.

  • index is the annotation index (a number; a negative or non-existent index will select no annotation).
  • options is a JSON object with the following attributes:
    • preventCameraAnimation: a boolean; true will select the annotation and move the camera position immediately into place
    • preventCameraMove: a boolean; true will select the annotation without moving the camera at all

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is the index of the selected annotation.
api.gotoAnnotation(0,  {preventCameraAnimation: true, preventCameraMove: false}, function(err, index) {
    if (!err) {
        window.console.log('Going to annotation', index + 1);
    }
});

unselectAnnotation( [callback] )

Unselects the current selected annotation if one is selected.

The callback has one parameter: an error or null if the operation succeeded.

api.unselectAnnotation(function(err) {
    if (!err) {
        window.console.log('Unselected annotations');
    }
});

showAnnotation( index, [callback] )

Shows the annotation for the given index. Annotation indices are zero-based.

index is the annotation index (a number).

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is the index of the selected annotation.
api.showAnnotation(0, function(err, index) {
    if (!err) {
        window.console.log('Showing annotation', index + 1);
    }
});

hideAnnotation( index, [callback] )

Hides the annotation for the given index. Annotation indices are zero-based.

index is the annotation index (a number).

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is the index of the selected annotation.
api.hideAnnotation(0, function(err, index) {
    if (!err) {
        window.console.log('Hiding annotation', index + 1);
    }
});

showAnnotationTooltip( index, [callback] )

Makes the annotation tooltip visible for the given index. When the annotation is selected, the tooltip will appear. Annotation indices are zero-based.

index is the annotation index (a number).

The callback has one parameter: an error or null if the operation succeeded.

api.showAnnotationTooltip(0, function(err) {
    if (!err) {
        window.console.log('Showing annotation tooltip');
    }
});

showAnnotationTooltips( [callback] )

Makes the annotation tooltip visible for all annotations. When an annotation is selected, the tooltip will appear.

The callback has one parameter: an error or null if the operation succeeded.

api.showAnnotationTooltips(function(err) {
    if (!err) {
        window.console.log('Showing annotation tooltip');
    }
});

hideAnnotationTooltip( index, [callback] )

Hides the annotation tooltip for the given index. When the annotation is selected, the tooltip will not appear. Annotation indices are zero-based.

index is the annotation index (a number).

The callback has one parameter: an error or null if the operation succeeded.

api.hideAnnotationTooltip(0, function(err) {
    if (!err) {
        window.console.log('Hiding annotation tooltip');
    }
});

hideAnnotationTooltips( [callback] )

Hides the annotation tooltip for all annotations. When an annotation is selected, the tooltip will not appear.

The callback has one parameter: an error or null if the operation succeeded.

api.hideAnnotationTooltips(function(err) {
    if (!err) {
        window.console.log('Hiding annotation tooltip');
    }
});

createAnnotation( positionStart, positionEnd, eye, target, title, text, [callback] )

Creates an annotation. A ray is cast from positionStart to positionEnd, and the annotation is created at the first intersection with a mesh, if any.

  • positionStart is the starting position of the cast ray (an array of 3D coordinates, [x, y, z]).
  • positionEnd is the end position of the cast ray (an array of 3D coordinates, [x, y, z]).
  • eye is the position of the camera when the annotation is selected (an array of 3D coordinates, [x, y, z]).
  • target is the target of the camera when the annotation is selected (an array of 3D coordinates, [x, y, z]).
  • title is the title of the annotation (a string).
  • text is the description of the annotation (a string, Markdown is supported).

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is the index of the created annotation.
api.createAnnotation(
    [-0.16, -3.86, 0.82],
    [0.12, -3.57, -0.51],
    camera.position,
    camera.target,
    'mytitle2',
    'mytext2',
    function(err, index) {
        if (!err) {
            window.console.log('Created new annotatation', index + 1);
        }
    }
);

createAnnotationFromScenePosition( position, eye, target, title, text, [callback] )

Creates an annotation at an arbitrary position in “mesh space”.

  • position is the position of the annotation (an array of 3D coordinates, [x, y, z]).
  • eye is the position of the camera when the annotation is selected (an array of 3D coordinates, [x, y, z]).
  • target is the target of the camera when the annotation is selected (an array of 3D coordinates, [x, y, z]).
  • title is the title of the annotation (a string).
  • text is the description of the annotation (a string, Markdown is supported).

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is the index of the created annotation.
api.createAnnotationFromScenePosition(
    [0.12, -3.57, -0.51],
    camera.position,
    camera.target,
    'mytitle2',
    'mytext2',
    function(err, index) {
        if (!err) {
            window.console.log('Created new annotatation', index + 1);
        }
    }
);

createAnnotationFromWorldPosition( position, eye, target, title, text, [callback] )

Creates an annotation at an arbitrary position in “world space”.

  • position is the position of the annotation (an array of 3D coordinates, [x, y, z]).
  • eye is the position of the camera when the annotation is selected (an array of 3D coordinates, [x, y, z]).
  • target is the target of the camera when the annotation is selected (an array of 3D coordinates, [x, y, z]).
  • title is the title of the annotation (a string).
  • text is the description of the annotation (a string, Markdown is supported).

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is the index of the created annotation.
api.createAnnotationFromWorldPosition(
    [0.12, -3.57, -0.51],
    camera.position,
    camera.target,
    'mytitle2',
    'mytext2',
    function(err, index) {
        if (!err) {
            window.console.log('Created new annotatation', index + 1);
        }
    }
);

getAnnotation( index, [callback] )

Gets the annotation information for the given index. Annotation indices are zero-based.

index is the annotation index (a number).

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is an annotation JSON object.
api.getAnnotation(0, function(err, information) {
    if (!err) {
        window.console.log(information);
    }
});

updateAnnotation( index, options, [callback] )

Updates the annotation information for the given index. Annotation indices are zero-based.

  • index is the annotation index (a number).
  • options is * options is a JSON object with the following attributes:
    • title: a string
    • content: a string, Markdown is supported
    • eye is the position of the camera when the annotation is selected (an array of 3D coordinates, [x, y, z]).
    • target is the target of the camera when the annotation is selected (an array of 3D coordinates, [x, y, z]).

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is an annotation JSON object.

(Interactive Sample)

api.updateAnnotation(1, {
    title: 'updatedTitle',
    content: 'updatedContent'
}, function(err, information) {
    if (!err) {
        window.console.log(information);
    }
});

removeAnnotation( index, [callback] )

Removes the annotation for the given index. Annotation indices are zero-based.

index is the annotation index (a number).

The callback has one parameter: an error or null if the operation succeeded.

api.removeAnnotation(0, function(err) {
    if (!err) {
        window.console.log('Removed annotation');
    }
});

removeAllAnnotations( [callback] )

Removes all annotations from the scene.

The callback has one parameter: an error or null if the operation succeeded.

api.removeAllAnnotations(function(err) {
    if (!err) {
        window.console.log('Removed all annotations');
    }
});

setAnnotationsTexture( options, [callback] )

(Interactive Sample)

Changes the image used to draw annototation icons. The image should be a grid of icons matching annotation indices from left to right, top to bottom.

options is a JSON object with the following attributes:

  • url: a URL of a CORS-enabled image file or a HTMLCanvasElement Data URI DOMString
  • colNumber: the number of columns in the icon image
  • padding: the padding between icons (a number, in pixels)
  • iconSize: the size of each icon (a number, in pixels)

For information on CORS, visit the MDN Web Docs. For details on implementing CORS on your own server, visit enable-cors.org.

For information on the HTMLCanvasElement interface, visit the MDN Web Docs.

Callback will be passed (err).

api.setAnnotationsTexture({}, function(err) {
    if (!err) {
        window.console.log('Updated annotation texture.');
    }
});

setAnnotationCameraTransition( doPreventAnimation, doPreventMove, [callback] )

Changes the way the camera transitions to an annotation.

  • doPreventAnimation defines if the camera movement is animated (a boolean; true will make the camera move immediately into position when an annotation is selected).
  • doPreventMove defines if the camera moves at all (a boolean; true will make the camera not move when an annotation is selected).

The callback has one parameter: an error or null if the operation succeeded.

api.setAnnotationCameraTransition(doPreventAnimation, doPreventMove, function(err) {
    if (err) {
        window.console.log(err);
    }
});

Events

Various actions in the viewer can have event handlers attached to them. This is useful for reacting to user interactions and managing states of the viewer.

viewerready

This event is triggered when the viewer is ready. This means the minimum resources have loaded to display the model, the user can interact with it, and scene data can be accessed.

api.addEventListener('viewerready', function() {
    window.console.log('Viewer is ready');
});

viewerstart

This event is triggered when the viewer is started.

api.addEventListener('viewerstart', function() {
    window.console.log('Viewer is started');
});

viewerstop

This event is triggered when the viewer is stopped.

api.addEventListener('viewerstop', function() {
    window.console.log('Viewer is stopped');
});

click

This event is triggered when the user clicks or taps in the viewer.

A pick parameter can be one of two options:

  • 'fast' is sufficient for most models, and will fire the event listener as soon as possible.
  • 'slow' is useful for animated models with high polygon counts. It ensures more precise picking at the expense of a slower event listener.

The event listener callback receives a JSON object with the following attributes:

  • position2D: the coordinates in the 2D gl viewport with pixel ratio taken into account (an array [z, y], y origin at bottom)
  • If the click intersects the model:
    • position3D: the 3D coordinates in the scene (an array, [x, y, z])
    • normal: normal vector of triangle intersected (an array, [x, y, z])
    • instanceID: picked node ID (a number)
    • material: picked material (JSON object)
api.addEventListener(
    'click',
    function(info) {
        window.console.log('click at', info.position2D);
        if (info.instanceID) {
            // Hit
            window.console.log('clicked node', info.instanceID);
        }
    },
    { pick: 'slow' }
);

nodeMouseEnter

This event is triggered when the mouse hovers over a node.

A pick parameter can be one of two options:

  • 'fast' is sufficient for most models, and will fire the event listener as soon as possible.
  • 'slow' is useful for animated models with high polygon counts. It ensures more precise picking at the expense of a slower event listener.

The event listener callback receives a node JSON object.

api.addEventListener(
    'nodeMouseEnter',
    function(node) {
        window.console.log('Entering node', node.instanceID);
    },
    { pick: 'fast' }
);

nodeMouseLeave

This event is triggered when the mouse no longer hovers over a node.

A pick parameter can be one of two options:

  • 'fast' is sufficient for most models, and will fire the event listener as soon as possible.
  • 'slow' is useful for animated models with high polygon counts. It ensures more precise picking at the expense of a slower event listener.

The event listener callback receives a node JSON object.

api.addEventListener(
    'nodeMouseLeave',
    function(node) {
        window.console.log('Leaving node', node.instanceID);
    },
    { pick: 'fast' }
);

annotationBlur

This event is triggered when the camera leaves an annotation (for example, when a user selects another annotation).

The event listener callback receives the index of the annotation that has been left (a number). Annotation indices are zero-based.

api.addEventListener('annotationBlur', function(index) {
    window.console.log('Leaving annotation', index);
});

annotationFocus

This event is triggered when the camera reaches a selected annotation.

The event listener callback receives the index of the annotation that has been reached (a number). Annotation indices are zero-based.

api.addEventListener('annotationFocus', function(index) {
    window.console.log('Reached annotation', index);
});

annotationMouseEnter

This event is triggered when the mouse hovers over an annotation.

The event listener callback receives the index of the annotation being hovered over (a number). Annotation indices are zero-based.

api.addEventListener('annotationMouseEnter', function(index) {
    window.console.log('Hovering on annotation', index);
});

annotationMouseLeave

This event is triggered when the mouse stops hovering over annotation.

The event listener callback receives the index of the annotation no longer being hovered over (a number). Annotation indices are zero-based.

api.addEventListener('annotationMouseLeave', function(index) {
    window.console.log('Stopped hovering on annotation', index);
});

annotationSelect

This event is triggered when an annotation is selected.

The event listener callback receives the index of the selected annotation (a number). Annotation indices are zero-based.

api.addEventListener('annotationSelect', function(index) {
    window.console.log('Selected annotation', index);
});

camerastart

This event is triggered when the camera begins to move.

The event listener callback receives no argument.

api.addEventListener('camerastart', function() {
    window.console.log('Camera is moving');
});

camerastop

This event is triggered when the camera stops moving.

The event listener callback receives no argument.

api.addEventListener('camerastop', function() {
    window.console.log('Camera stopped');
});

animationChange

This event is triggered when the animation track changes.

The event listener callback receives no argument.

api.addEventListener('animationChange', function() {
    window.console.log('Animation changed');
});

animationEnded

This event is triggered when the animation track ends.

The event listener callback receives no argument.

api.addEventListener('animationEnded', function() {
    window.console.log('Animation ended');
});

animationPlay

This event is triggered when the animation track starts playing.

The event listener callback receives no argument.

api.addEventListener('animationPlay', function() {
    window.console.log('Animation is now playing');
});

animationStop

This event is triggered when the animation track ends.

The event listener callback receives no argument.

api.addEventListener('animationStop', function() {
    window.console.log('Animation stopped');
});

backgroundLoaded

This event is triggered when the background or environment finished loading

The event listener callback receives no argument.

api.addEventListener('backgroundLoaded', function() {
    window.console.log('Background or environment loaded');
});

modelLoadProgress

This event is triggered while the model mesh is loading.

The event listener callback receives the load factor. When the factor is 1.0, the mesh is loaded.

api.addEventListener('modelLoadProgress', function(factor) {
    window.console.log('modelLoadProgress: ' + factor);
});

textureLoadProgress

This event is triggered while the model textures are loading.

The event listener callback receives the load factor. When the factor is 1.0, the textures are loaded.

api.addEventListener('textureLoadProgress', function(factor) {
    window.console.log('textureLoadProgress: ' + factor);
});

Animation

play( [callback] )

Plays the current animation.

The callback has one parameter: an error or null if the operation succeeded.

(Interactive Sample)

api.play(function(err) {
    if (!err) {
        window.console.log('Animation playing');
    }
});

pause( [callback] )

Pauses the current animation.

The callback has one parameter: an error or null if the operation succeeded.

(Interactive Sample)

api.pause(function(err) {
    if (!err) {
        window.console.log('Animation paused');
    }
});

seekTo( seconds, [callback] )

Seeks to a specific time of the current animation.

seconds is the time to seek to (a number, in seconds).

The callback has one parameter: an error or null if the operation succeeded.

(Interactive Sample)

api.seekTo(1.0, function(err) {
    if (!err) {
        window.console.log('Animation seeking');
    }
});

getAnimations( [callback] )

Returns the list of animations in the scene.

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is an array of animation arrays, [uid, name, duration].
api.getAnimations(function(err, animations) {
    if (!err) {
        window.console.log(animations);
    }
});

setCurrentAnimationByUID( uid, [callback] )

Sets the current animation.

uid is the UID of the animation, which can be found via getAnimations().

The callback has one parameter: an error or null if the operation succeeded.

api.getAnimations(function(err, animations) {
    if (!err) {
        var firstAnimationUID = animations[0][0];
        api.setCurrentAnimationByUID(firstAnimationUID, function(err) {
            if (!err) {
                window.console.log('Set animation track to', firstAnimationUID);
            }
        });
    }
});

getCurrentTime( [callback] )

Returns the current animation time in seconds.

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is the current animation time (a number, in seconds).
api.getCurrentTime(function(err, time) {
    if (!err) {
        window.console.log('Current animation time:', time);
    }
});

setCycleMode( cycleMode, [callback] )

Sets the animation cycle mode.

cycleMode is one of the following values:

  • 'loopOne': loops the current animation
  • 'loopAll': loops all animations
  • 'one': plays the current animation and stops
  • 'all': plays all animations and stops

The callback has one parameter: an error or null if the operation succeeded.

api.setCycleMode('one', function(err) {
    if (!err) {
        window.console.log('Set animation cycle mode');
    }
});

setSpeed( speed, [callback] )

Sets the current animation speed.

speed is a speed factor (a number). A negative value will play the animation in reverse.

// Set animation at half speed
var speed = 0.5;
api.setSpeed(speed, function(err) {
    if (!err) {
        window.console.log('Animation speed set to', speed);
    }
});

Inspector

setShadingStyle( shadingStyle, options, [callback] )

Sets the shading style.

  • shadingStyle is one of the following values:
    • 'pbr'
    • 'classic'
    • 'matcap'
  • options is a JSON object with the following attributes:
    • type: 'lit' or 'shadeless'

The callback has one parameter: an error or null if the operation succeeded.

api.setShadingStyle('pbr', {type: 'lit'}, function(err) {
    if (!err) {
        window.console.log('Shading style set');
    }
});

getShadingStyle( [callback] )

Returns the current shading style.

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is a JSON object with the following attributes:
    • shadingStyle: 'pbr', 'classic', or 'matcap'
    • type: 'lit' or 'shadeless'
api.getShadingStyle(function(err, shadingStyle) {
    window.console.log(shadingStyle);
});

setWireframe( enable, options, [callback] )

Sets the wireframe state. The wireframe cannot be enabled if ui_inspector: 0 is set in the client.init options.

  • enable is a boolean (true to show the wireframe, false to hide the wireframe)
  • options is a JSON object with the following attribute:
    • color: a hexidecimal color code string (do not include the #)

The callback has one parameter: an error or null if the operation succeeded.

api.setWireframe(true, {color: 'FF0000FF'}, function(err) {
    if (!err) {
        window.console.log('Set wireframe');
    }
});

getWireframe( [callback] )

Gets the current wireframe state.

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is a JSON object with the following attributes:
    • enabled: a boolean
    • color: a hexidecimal color code string
api.getWireframe(function(err, state) {
    if (!err) {
        window.console.log('Wireframe state:', state);
    }
});

Lights

Sketchfab supports up to three “analytical” real-time lights (Direction, Point, and Spot). For information on environmental lights, see Environment.

setLight( lightId, options, [callback] )

Sets the state of a light at a given index. Light indices are zero-based.

  • lightId is the light index (a number)
  • options is a JSON object with the following attributes:
    • matrix: the transform matrix of the light
    • enabled: a boolean (true turns the light on, false turns the light off)
    • shadowEnabled: a boolean (true makes the light cast shadows, false disables shadows)
    • color: the color of the light (a normalized RGB array, [R, G, B])
    • intensity: the intesity of the light (a number between 0 and 1)

We recommend the use of glMatrix for matrix operations. The transform matrix is column-major. This means that indices 12, 13 , and 14 (assuming a starting index of 0) in the transform matrix are responsible for translation.

The callback has one parameter: an error or null if the operation succeeded.

api.setLight(2, {color: [1, 0, 0]}, function(err) {
    if (!err) {
        window.console.log('Set light');
    }
});

getLight( lightId, [callback] )

Gets the state of a light at a given index. Light indices are zero-based.

  • lightId is the light index (a number)

The callback has two parameters:

  • The first is an error or null if the operation succeeded.
  • The second is a JSON object with the following attributes:
    • matrix: the transform matrix of the light
    • enabled: a boolean (true turns the light on, false turns the light off)
    • shadowEnabled: a boolean (true makes the light cast shadows, false disables shadows)
    • color: the color of the light (a normalized RGB array, [R, G, B])
    • intensity: the intesity of the light (a number between 0 and 1)

We recommend the use of glMatrix for matrix operations. The transform matrix is column-major. This means that indices 12, 13 , and 14 (assuming a starting index of 0) in the transform matrix are responsible for translation.

api.getLight(0, function(err, state) {
    window.console.log(state);
});

setLightFeatureEnabled( enable, [callback] )

Enables or disabled the analytical lights feature.

enable is a boolean (true to enable lights, false to disable lights).

The callback has one parameter: an error or null if the operation succeeded.

api.setLightFeatureEnabled(true, function(err) {
    if (!err) {
        window.console.log("Lights ready to be used");
    }
});

isLightFeatureEnabled( [callback] )

Gets the current state of the analytical lights feature.

  • The first is an error or null if the operation succeeded.
  • The second is a boolean (true if lights are enabled, false if lights are disabled).
api.isLightFeatureEnabled(function(err, state) {
    if (!state) {
        window.console.log("Lights cannot be used");
    }
});
Initialization and options Examples
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