Returns the id of the current active node.

Returns the id of the current active tree.

Returns the id of the current active group.

Sets the active node given a node id.

Returns all nodes belonging to a tracing.

Returns all trees belonging to a tracing.

Deletes the node with nodeId in the tree with treeId

Centers the active node.

Deletes the tree with the given treeId.

Completely resets the skeleton tracing.

Sets the comment for a node.

const activeNodeId = api.tracing.getActiveNodeId();
api.tracing.setCommentForNode("This is a branch point", activeNodeId);

Returns the comment for a given node and tree (optional).

const comment = api.tracing.getCommentForNode(23);

// Provide a tree for lookup speed boost
const comment = api.tracing.getCommentForNode(23, api.getActiveTreeid());

Sets the name for a tree. If no tree id is given, the active tree is used.

api.tracing.setTreeName("Special tree", 1);

Makes the specified tree active. Within the tree, the node with the highest ID will be activated.

api.tracing.setActiveTree(3);

Makes the tree specified by name active. Within the tree, the node with the highest ID will be activated.

api.tracing.setActiveTree("tree_1");

Makes the specified group active. Nodes cannot be added through the UI when a group is active.

api.tracing.setActiveGroup(3);

Changes the color of the referenced tree. Internally, a pre-defined array of colors is used which is why this function uses a colorIndex (between 0 and 500) instead of a proper color.

api.tracing.setTreeColorIndex(3, 10);

Changes the visibility of the referenced tree.

api.tracing.setTreeVisibility(3, false);

Gets a list of tree groups

api.tracing.getTreeGroups();

Sets the parent group of the referenced tree.

api.tracing.setTreeGroup(
  3,
  api.tracing.getTreeGroups.find(({ name }) => name === "My Tree Group").id,
);

Renames the group referenced by the provided id.

api.tracing.renameGroup(
  3,
  "New group name",
);

Returns the name for a given tree id. If none is given, the name of the active tree is returned.

api.tracing.getTreeName();

Saves the tracing and returns a promise (which you can call then on or use await with).

api.tracing.save().then(() => ... );

await api.tracing.save();

Finishes the task and gets the next one. It returns a promise (which you can call then on or use await with). Don't assume that code after the finishAndGetNextTask call will be executed. It can happen that there is no further task, in which case the user will be redirected to the dashboard. Or the the page can be reloaded (e.g., if the dataset changed), which also means that no further JS code will be executed in this site context.

api.tracing.finishAndGetNextTask().then(() => ... );

await api.tracing.finishAndGetNextTask();

Restart webKnossos without refreshing the page. Please prefer finishAndGetNextTask for user scripts since it does extra validation of the requested change and makes sure everything is saved etc.

api.tracing.restart("Explorational", "5909b5aa3e0000d4009d4d15", "TRACE")

Reload tracing by reloading the entire page.

api.tracing.hardReload()

Increases the node radius of the given node by multiplying it with 1.05^delta. If no nodeId and/or treeId are provided, it defaults to the current tree and current node.

api.tracing.setNodeRadius(1)

Centers the given node. If no node is provided, the active node is centered.

api.tracing.centerNode()

Centers the 3D view.

api.tracing.centerTDView()

Measures the length of the given tree and returns the length in nanometer and in voxels.

Measures the length of all trees and returns the length in nanometer and in voxels.

Returns the length of the shortest path between two nodes in nanometer and in voxels.

Starts an animation to center the given position. See setCameraPosition for a non-animated version of this function.

api.tracing.centerPositionAnimated([0, 0, 0])

Returns the current camera position.

const currentPosition = api.tracing.getCameraPosition()

Sets the current camera position. See centerPositionAnimated for an animated version of this function.

api.tracing.setCameraPosition([100, 100, 100])

Returns the id of the current active segment. Volume tracing only!

Sets the active segment given a segment id. If a segment with the given id doesn't exist, it is created. Volume tracing only!

Returns the active tool which is either "MOVE", "SKELETON", "TRACE", "BRUSH", "FILL_CELL" or "PICK_CELL"

Sets the active tool which should be either "MOVE", "SKELETON", "TRACE", "BRUSH", "FILL_CELL" or "PICK_CELL" Volume tracing only!

Deprecated! Use getAnnotationTool instead.

Deprecated! Use setAnnotationTool instead.

Use this method to create a complete resolution pyramid by downsampling the lowest present mag (e.g., mag 1). This method will save the current changes and then reload the page after the downsampling has finished. This function can only be used for non-tasks.

Note that this invoking this method will not block the UI. Thus, user actions can be performed during the downsampling. The caller should prohibit this (e.g., by showing a not-closable modal during the process).

Returns the names of all available layers of the current tracing.

DEPRECATED! Use getSegmentationLayerNames, getVisibleSegmentationLayer or getVolumeTracingLayerIds instead.

Returns the name of the volume tracing layer (only exists for a volume annotation) or the visible segmentation layer.

Return a list of segmentation layer names. Note for volume tracing layers, the name will be an ID (and not the name which the user can specify in the UI).

Invalidates all downloaded buckets of the given layer so that they are reloaded.

Invalidates all downloaded buckets so that they are reloaded.

Sets a mapping for a given layer.

const position = [123, 123, 123];
const segmentationLayerName = "segmentation";
const segmentId = await api.data.getDataValue(segmentationLayerName, position);
const treeId = api.tracing.getActiveTreeId();
const mapping = {[segmentId]: treeId}

api.data.setMapping(segmentationLayerName, mapping);

Enables/Disables the active mapping. If layerName is not passed, the currently visible segmentation layer will be used.

Gets all available mapping names for a given layer. If the layerName is not passed, the currently visible segmentation layer will be used.

Gets the active mapping for a given layer. If layerName is not passed, the currently visible segmentation layer will be used.

Sets the active mapping for a given layer. If layerName is not passed, the currently visible segmentation layer will be used.

Returns whether a mapping is currently enabled. If layerName is not passed, the currently visible segmentation layer will be used.

Returns the bounding box for a given layer name.

Returns raw binary data for a given layer, position and zoom level. If the zoom level is not provided, the first resolution will be used. If this resolution does not exist, the next existing resolution will be used. If the zoom level is provided and points to a not existent resolution, 0 will be returned.

// Return the greyscale value for a bucket
const position = [123, 123, 123];
api.data.getDataValue("binary", position).then((greyscaleColor) => ...);

// Using the await keyword instead of the promise syntax
const greyscaleColor = await api.data.getDataValue("binary", position);

// Get the segmentation id for the first volume tracing layer
const segmentId = await api.data.getDataValue(api.data.getVolumeTracingLayerIds()[0], position);

Downloads a cuboid of raw data from a dataset (not tracing) layer. A new window is opened for the download - if that is not the case, please check your pop-up blocker.

// Download a cuboid (from (0, 0, 0) to (100, 200, 100)) of raw data from the "segmentation" layer.
api.data.downloadRawDataCuboid("segmentation", [0,0,0], [100,200,100]);

Label voxels with the supplied value. Volume tracing only!

// Set the segmentation id for some voxels to 1337
api.data.labelVoxels([[1,1,1], [1,2,1], [2,1,1], [2,2,1]], 1337);

Returns the dataset's setting for the tracing view.

const segmentationOpacity = api.data.getConfiguration("segmentationOpacity");

Set the dataset's setting for the tracing view.

api.data.setConfiguration("segmentationOpacity", 20);

Retrieve a list of available precomputed mesh files. If layerName is not passed, the currently visible segmentation layer will be used.

const availableMeshFileNames = api.data.getAvailableMeshFiles();

Get currently active mesh file (might be null). If layerName is not passed, the currently visible segmentation layer will be used.

const activeMeshFile = api.data.getActiveMeshFile();

Set currently active mesh file (can be set to null). If layerName is not passed, the currently visible segmentation layer will be used.

const availableMeshFileNames = api.data.getAvailableMeshFiles();
if (availableMeshFileNames.length > 0) {
  api.data.setActiveMeshFile(availableMeshFileNames[0]);
}

If a mesh file is active, loadPrecomputedMesh can be used to load a mesh for a given segment at a given seed position for a specified segmentation layer. If layerName is not passed, the currently visible segmentation layer will be used. If there is no mesh file for the dataset's segmentation layer available, you can use api.data.computeMeshOnDemand instead.

const currentPosition = api.tracing.getCameraPosition();
const segmentId = await api.data.getDataValue("segmentation", currentPosition);
const availableMeshFiles = await api.data.getAvailableMeshFiles();
api.data.setActiveMeshFile(availableMeshFiles[0]);

await api.data.loadPrecomputedMesh(segmentId, currentPosition);

Load a mesh for a given segment id and a seed position by computing it ad-hoc.

const currentPosition = api.tracing.getCameraPosition();
const segmentId = await api.data.getDataValue("segmentation", currentPosition);
api.data.computeMeshOnDemand(segmentId, currentPosition);

Set the visibility for a loaded mesh by providing the corresponding segment id. If layerName is not passed, the currently visible segmentation layer will be used.

api.data.setMeshVisibility(segmentId, false);

Remove the mesh for a given segment and segmentation layer. If layerName is not passed, the currently visible segmentation layer will be used.

api.data.removeMesh(segmentId, layerName);

Removes all meshes from the scene for a given segmentation layer. If layerName is not passed, the currently visible segmentation layer will be used.

api.data.resetMeshes();

Returns the user's setting for the tracing view.

const keyboardDelay = api.user.getConfiguration("keyboardDelay");

Set the user's setting for the tracing view.

api.user.setConfiguration("keyboardDelay", 20);

Wait for some milliseconds before continuing the control flow.

// Wait for 5 seconds
await api.utils.sleep(5000);

Show a toast to the user. Returns a function which can be used to remove the toast again.

// Show a toast for 5 seconds
const removeToast = api.utils.showToast("info", "You just got toasted", false, 5000);
// ... optionally:
// removeToast();

Overwrite existing wK actions. wK uses Redux actions to trigger any changes to the application state.

api.utils.registerOverwrite("MERGE_TREES", (store, next, originalAction) => {
  // ... do stuff before the original function...
  next(originalAction);
  // ... do something after the original function ...
});

Sets a custom handler function for a keyboard shortcut.