Babylon.js/Babylon/Tools/babylon.sceneSerializer.ts

module BABYLON {

    var serializeLight = (light: Light): any => {
        var serializationObject:any = {};
        serializationObject.name = light.name;
        serializationObject.id = light.id;
        serializationObject.tags = Tags.GetTags(light);

        if (light instanceof BABYLON.PointLight) {
            serializationObject.type = 0;
            serializationObject.position = (<PointLight>light).position.asArray();
        } else if (light instanceof BABYLON.DirectionalLight) {
            serializationObject.type = 1;
            var directionalLight = <DirectionalLight>light;
            serializationObject.position = directionalLight.position.asArray();
            serializationObject.direction = directionalLight.direction.asArray();
        } else if (light instanceof BABYLON.SpotLight) {
            serializationObject.type = 2;
            var spotLight = <SpotLight>light;
            serializationObject.position = spotLight.position.asArray();
            serializationObject.direction = spotLight.position.asArray();
            serializationObject.angle = spotLight.angle;
            serializationObject.exponent = spotLight.exponent;
        } else if (light instanceof BABYLON.HemisphericLight) {
            serializationObject.type = 2;
            serializationObject.groundColor = (<HemisphericLight>light).groundColor.asArray();
        }

        if (light.intensity) {
            serializationObject.intensity = light.intensity;
        }

        serializationObject.range = light.range;

        serializationObject.diffuse = light.diffuse.asArray();
        serializationObject.specular = light.specular.asArray();

        return serializationObject;
    };

    var serializeCamera = (camera: FreeCamera): any => {
        var serializationObject:any = {};
        serializationObject.name = camera.name;
        serializationObject.tags = Tags.GetTags(camera);
        serializationObject.id = camera.id;
        serializationObject.position = camera.position.asArray();

        // Parent
        if (camera.parent) {
            serializationObject.parentId = camera.parent.id;
        }

        // Target
        serializationObject.rotation = camera.rotation.asArray();

        // Locked target
        if (camera.lockedTarget && camera.lockedTarget.id) {
            serializationObject.lockedTargetId = camera.lockedTarget.id;
        }

        serializationObject.fov = camera.fov;
        serializationObject.minZ = camera.minZ;
        serializationObject.maxZ = camera.maxZ;

        serializationObject.speed = camera.speed;
        serializationObject.inertia = camera.inertia;

        serializationObject.checkCollisions = camera.checkCollisions;
        serializationObject.applyGravity = camera.applyGravity;

        if (camera.ellipsoid) {
            serializationObject.ellipsoid = camera.ellipsoid.asArray();
        }

        // Animations
        appendAnimations(camera, serializationObject);

        return serializationObject;
    };

    var appendAnimations = (source: IAnimatable, destination: any): any => {
        if (source.animations) {
            destination.animations = [];
            for (var animationIndex = 0; animationIndex < source.animations.length; animationIndex++) {
                var animation = source.animations[animationIndex];

                destination.animations.push(serializeAnimation(animation));
            }
        }
    };

    var serializeAnimation = (animation: Animation): any => {
        var serializationObject:any = {};

        serializationObject.name = animation.name;
        serializationObject.property = animation.targetProperty;
        serializationObject.framePerSecond = animation.framePerSecond;
        serializationObject.dataType = animation.dataType;
        serializationObject.loopBehavior = animation.loopMode;

        var dataType = animation.dataType;
        serializationObject.keys = [];
        var keys = animation.getKeys();
        for (var index = 0; index < keys.length; index++) {
            var animationKey = keys[index];

            var key:any = {};
            key.frame = animationKey.frame;

            switch (dataType) {
            case BABYLON.Animation.ANIMATIONTYPE_FLOAT:
                key.values = [animationKey.value];
                break;
            case BABYLON.Animation.ANIMATIONTYPE_QUATERNION:
            case BABYLON.Animation.ANIMATIONTYPE_MATRIX:
            case BABYLON.Animation.ANIMATIONTYPE_VECTOR3:
                key.values = animationKey.value.asArray();
                break;
            }

            serializationObject.keys.push(key);
        }

        return serializationObject;
    };

    var serializeMultiMaterial = (material: MultiMaterial): any => {
        var serializationObject:any = {};

        serializationObject.name = material.name;
        serializationObject.id = material.id;
        serializationObject.tags = Tags.GetTags(material);

        serializationObject.materials = [];

        for (var matIndex = 0; matIndex < material.subMaterials.length; matIndex++) {
            var subMat = material.subMaterials[matIndex];

            if (subMat) {
                serializationObject.materials.push(subMat.id);
            } else {
                serializationObject.materials.push(null);
            }
        }

        return serializationObject;
    };

    var serializeMaterial = (material: StandardMaterial): any => {
        var serializationObject:any = {};

        serializationObject.name = material.name;

        serializationObject.ambient = material.ambientColor.asArray();
        serializationObject.diffuse = material.diffuseColor.asArray();
        serializationObject.specular = material.specularColor.asArray();
        serializationObject.specularPower = material.specularPower;
        serializationObject.emissive = material.emissiveColor.asArray();

        serializationObject.alpha = material.alpha;

        serializationObject.id = material.id;
        serializationObject.tags = Tags.GetTags(material);
        serializationObject.backFaceCulling = material.backFaceCulling;

        if (material.diffuseTexture) {
            serializationObject.diffuseTexture = serializeTexture(material.diffuseTexture);
        }

        if (material.ambientTexture) {
            serializationObject.ambientTexture = serializeTexture(material.ambientTexture);
        }

        if (material.opacityTexture) {
            serializationObject.opacityTexture = serializeTexture(material.opacityTexture);
        }

        if (material.reflectionTexture) {
            serializationObject.reflectionTexture = serializeTexture(material.reflectionTexture);
        }

        if (material.emissiveTexture) {
            serializationObject.emissiveTexture = serializeTexture(material.emissiveTexture);
        }

        if (material.specularTexture) {
            serializationObject.specularTexture = serializeTexture(material.specularTexture);
        }

        if (material.bumpTexture) {
            serializationObject.bumpTexture = serializeTexture(material.bumpTexture);
        }

        return serializationObject;
    };

    var serializeTexture = (texture: Texture): any => {
        var serializationObject:any = {};

        if (!texture.name) {
            return null;
        }

        if (texture instanceof BABYLON.CubeTexture) {
            serializationObject.name = texture.name;
            serializationObject.hasAlpha = texture.hasAlpha;
            serializationObject.level = texture.level;
            serializationObject.coordinatesMode = texture.coordinatesMode;

            return serializationObject;
        }

        if (texture instanceof BABYLON.MirrorTexture) {
            var mirrorTexture = <MirrorTexture>texture;
            serializationObject.renderTargetSize = mirrorTexture.getRenderSize();
            serializationObject.renderList = [];

            for (var index = 0; index < mirrorTexture.renderList.length; index++) {
                serializationObject.renderList.push(mirrorTexture.renderList[index].id);
            }

            serializationObject.mirrorPlane = mirrorTexture.mirrorPlane.asArray();
        } else if (texture instanceof BABYLON.RenderTargetTexture) {
            var renderTargetTexture = <RenderTargetTexture>texture;
            serializationObject.renderTargetSize = renderTargetTexture.getRenderSize();
            serializationObject.renderList = [];

            for (index = 0; index < renderTargetTexture.renderList.length; index++) {
                serializationObject.renderList.push(renderTargetTexture.renderList[index].id);
            }
        }

        serializationObject.name = texture.name;
        serializationObject.hasAlpha = texture.hasAlpha;
        serializationObject.level = texture.level;

        serializationObject.coordinatesIndex = texture.coordinatesIndex;
        serializationObject.coordinatesMode = texture.coordinatesMode;
        serializationObject.uOffset = texture.uOffset;
        serializationObject.vOffset = texture.vOffset;
        serializationObject.uScale = texture.uScale;
        serializationObject.vScale = texture.vScale;
        serializationObject.uAng = texture.uAng;
        serializationObject.vAng = texture.vAng;
        serializationObject.wAng = texture.wAng;

        serializationObject.wrapU = texture.wrapU;
        serializationObject.wrapV = texture.wrapV;

        // Animations
        appendAnimations(texture, serializationObject);

        return serializationObject;
    };

    var serializeSkeleton = (skeleton:Skeleton): any => {
        var serializationObject:any = {};

        serializationObject.name = skeleton.name;
        serializationObject.id = skeleton.id;

        serializationObject.bones = [];

        for (var index = 0; index < skeleton.bones.length; index++) {
            var bone = skeleton.bones[index];

            var serializedBone:any = {
                parentBoneIndex: bone.getParent() ? skeleton.bones.indexOf(bone.getParent()) : -1,
                name: bone.name,
                matrix: bone.getLocalMatrix().toArray()
            };

            serializationObject.bones.push(serializedBone);

            if (bone.animations && bone.animations.length > 0) {
                serializedBone.animation = serializeAnimation(bone.animations[0]);
            }
        }
        return serializationObject;
    };

    var serializeParticleSystem = (particleSystem:ParticleSystem): any => {
        var serializationObject:any = {};

        serializationObject.emitterId = particleSystem.emitter.id;
        serializationObject.capacity = particleSystem.getCapacity();

        if (particleSystem.particleTexture) {
            serializationObject.textureName = particleSystem.particleTexture.name;
        }

        serializationObject.minAngularSpeed = particleSystem.minAngularSpeed;
        serializationObject.maxAngularSpeed = particleSystem.maxAngularSpeed;
        serializationObject.minSize = particleSystem.minSize;
        serializationObject.maxSize = particleSystem.maxSize;
        serializationObject.minLifeTime = particleSystem.minLifeTime;
        serializationObject.maxLifeTime = particleSystem.maxLifeTime;
        serializationObject.emitRate = particleSystem.emitRate;
        serializationObject.minEmitBox = particleSystem.minEmitBox.asArray();
        serializationObject.maxEmitBox = particleSystem.maxEmitBox.asArray();
        serializationObject.gravity = particleSystem.gravity.asArray();
        serializationObject.direction1 = particleSystem.direction1.asArray();
        serializationObject.direction2 = particleSystem.direction2.asArray();
        serializationObject.color1 = particleSystem.color1.asArray();
        serializationObject.color2 = particleSystem.color2.asArray();
        serializationObject.colorDead = particleSystem.colorDead.asArray();
        serializationObject.updateSpeed = particleSystem.updateSpeed;
        serializationObject.targetStopDuration = particleSystem.targetStopDuration;
        serializationObject.textureMask = particleSystem.textureMask.asArray();
        serializationObject.blendMode = particleSystem.blendMode;

        return serializationObject;
    };

    var serializeLensFlareSystem = (lensFlareSystem:LensFlareSystem):any => {
        var serializationObject:any = {};

        serializationObject.emitterId = lensFlareSystem.getEmitter().id;
        serializationObject.borderLimit = lensFlareSystem.borderLimit;

        serializationObject.flares = [];
        for (var index = 0; index < lensFlareSystem.lensFlares.length; index++) {
            var flare = lensFlareSystem.lensFlares[index];

            serializationObject.flares.push({
                size: flare.size,
                position: flare.position,
                color: flare.color.asArray(),
                textureName: BABYLON.Tools.GetFilename(flare.texture.name)
            });
        }


        return serializationObject;
    };

    var serializeShadowGenerator = (light: Light):any => {
        var serializationObject:any = {};
        var shadowGenerator = light.getShadowGenerator();

        serializationObject.lightId = light.id;
        serializationObject.mapSize = shadowGenerator.getShadowMap().getRenderSize();
        serializationObject.useVarianceShadowMap = shadowGenerator.useVarianceShadowMap;

        serializationObject.renderList = [];
        for (var meshIndex = 0; meshIndex < shadowGenerator.getShadowMap().renderList.length; meshIndex++) {
            var mesh = shadowGenerator.getShadowMap().renderList[meshIndex];

            serializationObject.renderList.push(mesh.id);
        }

        return serializationObject;
    };

    var serializedGeometries: Geometry[] = [];
    var serializeGeometry = (geometry: Geometry, serializationGeometries: any): any => {
        if (serializedGeometries[geometry.id]) {
            return;
        }
        if (geometry instanceof Geometry.Primitives.Box) {
            serializationGeometries.boxes.push(serializeBox(<Geometry.Primitives.Box>geometry));
        }
        else if (geometry instanceof Geometry.Primitives.Sphere) {
            serializationGeometries.spheres.push(serializeSphere(<Geometry.Primitives.Sphere>geometry));
        }
        else if (geometry instanceof Geometry.Primitives.Cylinder) {
            serializationGeometries.cylinders.push(serializeCylinder(<Geometry.Primitives.Cylinder>geometry));
        }
        else if (geometry instanceof Geometry.Primitives.Torus) {
            serializationGeometries.toruses.push(serializeTorus(<Geometry.Primitives.Torus>geometry));
        }
        else if (geometry instanceof Geometry.Primitives.Ground) {
            serializationGeometries.grounds.push(serializeGround(<Geometry.Primitives.Ground>geometry));
        }
        else if (geometry instanceof Geometry.Primitives.Plane) {
            serializationGeometries.planes.push(serializePlane(<Geometry.Primitives.Plane>geometry));
        }
        else if (geometry instanceof Geometry.Primitives.TorusKnot) {
            serializationGeometries.torusKnots.push(serializeTorusKnot(<Geometry.Primitives.TorusKnot>geometry));
        }
        else if (geometry instanceof Geometry.Primitives._Primitive) {
            throw new Error("Unknow primitive type");
        }
        else {
            serializationGeometries.vertexData.push(serializeVertexData(geometry));
        }

        serializedGeometries[geometry.id] = true;
    };

    var serializeGeometryBase = (geometry: Geometry): any => {
        var serializationObject: any = {};

        serializationObject.id = geometry.id;

        if (Tags.HasTags(geometry)) {
            serializationObject.tags = Tags.GetTags(geometry);
        }

        return serializationObject;
    };

    var serializeVertexData = (vertexData: Geometry): any => {
        var serializationObject = serializeGeometryBase(vertexData);

        if (vertexData.isVerticesDataPresent(BABYLON.VertexBuffer.PositionKind)) {
            serializationObject.positions = vertexData.getVerticesData(BABYLON.VertexBuffer.PositionKind);
        }

        if (vertexData.isVerticesDataPresent(BABYLON.VertexBuffer.NormalKind)) {
            serializationObject.normals = vertexData.getVerticesData(BABYLON.VertexBuffer.NormalKind);
        }

        if (vertexData.isVerticesDataPresent(BABYLON.VertexBuffer.UVKind)) {
            serializationObject.uvs = vertexData.getVerticesData(BABYLON.VertexBuffer.UVKind);
        }

        if (vertexData.isVerticesDataPresent(BABYLON.VertexBuffer.UV2Kind)) {
            serializationObject.uvs2 = vertexData.getVerticesData(BABYLON.VertexBuffer.UV2Kind);
        }

        if (vertexData.isVerticesDataPresent(BABYLON.VertexBuffer.ColorKind)) {
            serializationObject.colors = vertexData.getVerticesData(BABYLON.VertexBuffer.ColorKind);
        }

        if (vertexData.isVerticesDataPresent(BABYLON.VertexBuffer.MatricesIndicesKind)) {
            serializationObject.matricesIndices = vertexData.getVerticesData(BABYLON.VertexBuffer.MatricesIndicesKind);
            serializationObject.matricesIndices._isExpanded = true;
        }

        if (vertexData.isVerticesDataPresent(BABYLON.VertexBuffer.MatricesWeightsKind)) {
            serializationObject.matricesWeights = vertexData.getVerticesData(BABYLON.VertexBuffer.MatricesWeightsKind);
        }

        serializationObject.indices = vertexData.getIndices();

        return serializationObject;
    };

    var serializePrimitive = (primitive: Geometry.Primitives._Primitive): any => {
        var serializationObject = serializeGeometryBase(primitive);

        serializationObject.canBeRegenerated = primitive.canBeRegenerated();

        return serializationObject;
    };

    var serializeBox = (box: Geometry.Primitives.Box): any => {
        var serializationObject = serializePrimitive(box);

        serializationObject.size = box.size;

        return serializationObject;
    };

    var serializeSphere = (sphere: Geometry.Primitives.Sphere): any => {
        var serializationObject = serializePrimitive(sphere);

        serializationObject.segments = sphere.segments;
        serializationObject.diameter = sphere.diameter;

        return serializationObject;
    };

    var serializeCylinder = (cylinder: Geometry.Primitives.Cylinder): any => {
        var serializationObject = serializePrimitive(cylinder);

        serializationObject.height = cylinder.height;
        serializationObject.diameterTop = cylinder.diameterTop;
        serializationObject.diameterBottom = cylinder.diameterBottom;
        serializationObject.tessellation = cylinder.tessellation;

        return serializationObject;
    };

    var serializeTorus = (torus: Geometry.Primitives.Torus): any => {
        var serializationObject = serializePrimitive(torus);

        serializationObject.diameter = torus.diameter;
        serializationObject.thickness = torus.thickness;
        serializationObject.tessellation = torus.tessellation;

        return serializationObject;
    };

    var serializeGround = (ground: Geometry.Primitives.Ground): any => {
        var serializationObject = serializePrimitive(ground);

        serializationObject.width = ground.width;
        serializationObject.height = ground.height;
        serializationObject.subdivisions = ground.subdivisions;

        return serializationObject;
    };

    var serializePlane = (plane: Geometry.Primitives.Plane): any => {
        var serializationObject = serializePrimitive(plane);

        serializationObject.size = plane.size;

        return serializationObject;
    };

    var serializeTorusKnot = (torusKnot: Geometry.Primitives.TorusKnot): any => {
        var serializationObject = serializePrimitive(torusKnot);

        serializationObject.radius = torusKnot.radius;
        serializationObject.tube = torusKnot.tube;
        serializationObject.radialSegments = torusKnot.radialSegments;
        serializationObject.tubularSegments = torusKnot.tubularSegments;
        serializationObject.p = torusKnot.p;
        serializationObject.q = torusKnot.q;

        return serializationObject;
    };

    var serializeMesh = (mesh: Mesh, serializationScene: any):any => {
        var serializationObject:any = {};

        serializationObject.name = mesh.name;
        serializationObject.id = mesh.id;

        if (Tags.HasTags(mesh)) {
            serializationObject.tags = Tags.GetTags(mesh);
        }

        serializationObject.position = mesh.position.asArray();

        if (mesh.rotationQuaternion) {
            serializationObject.rotationQuaternion = mesh.rotationQuaternion.asArray();
        } else if (mesh.rotation) {
            serializationObject.rotation = mesh.rotation.asArray();
        }

        serializationObject.scaling = mesh.scaling.asArray();
        serializationObject.localMatrix = mesh.getPivotMatrix().asArray();

        serializationObject.isEnabled = mesh.isEnabled();
        serializationObject.isVisible = mesh.isVisible;
        serializationObject.infiniteDistance = mesh.infiniteDistance;
        serializationObject.pickable = mesh.isPickable;

        serializationObject.receiveShadows = mesh.receiveShadows;

        serializationObject.billboardMode = mesh.billboardMode;
        serializationObject.visibility = mesh.visibility;

        serializationObject.checkCollisions = mesh.checkCollisions;

        // Parent
        if (mesh.parent) {
            serializationObject.parentId = mesh.parent.id;
        }

        // Geometry
        var geometry = mesh._geometry;
        if (geometry) {
            var geometryId = geometry.id;
            serializationObject.geometryId = geometryId;

            if (!mesh.getScene().getGeometryByID(geometryId)) {
                // geometry was in the memory but not added to the scene, nevertheless it's better to serialize too be able to reload the mesh with its geometry
                serializeGeometry(geometry, serializationScene.geometries);
            }

            // SubMeshes
            serializationObject.subMeshes = [];
            for (var subIndex = 0; subIndex < mesh.subMeshes.length; subIndex++) {
                var subMesh = mesh.subMeshes[subIndex];

                serializationObject.subMeshes.push({
                    materialIndex: subMesh.materialIndex,
                    verticesStart: subMesh.verticesStart,
                    verticesCount: subMesh.verticesCount,
                    indexStart: subMesh.indexStart,
                    indexCount: subMesh.indexCount
                });
            }
        }

        // Material
        if (mesh.material) {
            serializationObject.materialId = mesh.material.id;
        } else {
            mesh.material = null;
        }

        // Skeleton
        if (mesh.skeleton) {
            serializationObject.skeletonId = mesh.skeleton.id;
        }

        // Physics
        if (mesh.getPhysicsImpostor() !== BABYLON.PhysicsEngine.NoImpostor) {
            serializationObject.physicsMass = mesh.getPhysicsMass();
            serializationObject.physicsFriction = mesh.getPhysicsFriction();
            serializationObject.physicsRestitution = mesh.getPhysicsRestitution();

            switch (mesh.getPhysicsImpostor()) {
            case BABYLON.PhysicsEngine.BoxImpostor:
                serializationObject.physicsImpostor = 1;
                break;
            case BABYLON.PhysicsEngine.SphereImpostor:
                serializationObject.physicsImpostor = 2;
                break;
            }
        }

        // Animations
        appendAnimations(mesh, serializationObject);

        return serializationObject;
    };


    export class SceneSerializer {
        public static Serialize(scene: Scene): any {
            var serializationObject:any = {};

            // Scene
            serializationObject.useDelayedTextureLoading = scene.useDelayedTextureLoading;
            serializationObject.autoClear = scene.autoClear;
            serializationObject.clearColor = scene.clearColor.asArray();
            serializationObject.ambientColor = scene.ambientColor.asArray();
            serializationObject.gravity = scene.gravity.asArray();

            // Fog
            if (scene.fogMode && scene.fogMode !== 0) {
                serializationObject.fogMode = scene.fogMode;
                serializationObject.fogColor = scene.fogColor.asArray();
                serializationObject.fogStart = scene.fogStart;
                serializationObject.fogEnd = scene.fogEnd;
                serializationObject.fogDensity = scene.fogDensity;
            }

            // Lights
            serializationObject.lights = [];
            for (var index = 0; index < scene.lights.length; index++) {
                var light = scene.lights[index];

                serializationObject.lights.push(serializeLight(light));
            }

            // Cameras
            serializationObject.cameras = [];
            for (index = 0; index < scene.cameras.length; index++) {
                var camera = scene.cameras[index];

                if (camera instanceof BABYLON.FreeCamera) {
                    serializationObject.cameras.push(serializeCamera(<FreeCamera>camera));
                }
            }
            if (scene.activeCamera) {
                serializationObject.activeCameraID = scene.activeCamera.id;
            }

            // Materials
            serializationObject.materials = [];
            serializationObject.multiMaterials = [];
            for (index = 0; index < scene.materials.length; index++) {
                var material = scene.materials[index];

                if (material instanceof BABYLON.StandardMaterial) {
                    serializationObject.materials.push(serializeMaterial(<StandardMaterial>material));
                } else if (material instanceof BABYLON.MultiMaterial) {
                    serializationObject.multiMaterials.push(serializeMultiMaterial(<MultiMaterial>material));
                }
            }

            // Skeletons
            serializationObject.skeletons = [];
            for (index = 0; index < scene.skeletons.length; index++) {
                serializationObject.skeletons.push(serializeSkeleton(scene.skeletons[index]));
            }

            // Geometries
            serializationObject.geometries = {};

            serializationObject.geometries.boxes = [];
            serializationObject.geometries.spheres = [];
            serializationObject.geometries.cylinders = [];
            serializationObject.geometries.toruses = [];
            serializationObject.geometries.grounds = [];
            serializationObject.geometries.planes = [];
            serializationObject.geometries.torusKnots = [];
            serializationObject.geometries.vertexData = [];

            serializedGeometries = [];
            var geometries = scene.getGeometries();
            for (var index = 0; index < geometries.length; index++) {
                var geometry = geometries[index];

                if (geometry.isReady()) {
                    serializeGeometry(geometry, serializationObject.geometries);
                }
            }

            // Meshes
            serializationObject.meshes = [];
            for (index = 0; index < scene.meshes.length; index++) {
                var mesh = scene.meshes[index];

                if (mesh.delayLoadState === BABYLON.Engine.DELAYLOADSTATE_LOADED || mesh.delayLoadState === BABYLON.Engine.DELAYLOADSTATE_NONE) {
                    serializationObject.meshes.push(serializeMesh(mesh, serializationObject));
                }
            }

            // Particles Systems
            serializationObject.particleSystems = [];
            for (index = 0; index < scene.particleSystems.length; index++) {
                serializationObject.particleSystems.push(serializeParticleSystem(scene.particleSystems[index]));
            }

            // Lens flares
            serializationObject.lensFlareSystems = [];
            for (index = 0; index < scene.lensFlareSystems.length; index++) {
                serializationObject.lensFlareSystems.push(serializeLensFlareSystem(scene.lensFlareSystems[index]));
            }

            // Shadows
            serializationObject.shadowGenerators = [];
            for (index = 0; index < scene.lights.length; index++) {
                light = scene.lights[index];

                if (light.getShadowGenerator()) {
                    serializationObject.shadowGenerators.push(serializeShadowGenerator(light));
                }
            }

            return serializationObject;
        }
    }
}