@types/d3-quadtree

  • Version 3.0.2
  • Published
  • 11.9 kB
  • No dependencies
  • MIT license

Install

npm i @types/d3-quadtree
yarn add @types/d3-quadtree
pnpm add @types/d3-quadtree

Overview

TypeScript definitions for D3JS d3-quadtree module

Index

Functions

function quadtree

quadtree: {
<T = [number, number]>(data?: T[]): Quadtree<T>;
<T = [number, number]>(
data: T[],
x: (d: T) => number,
y: (d: T) => number
): Quadtree<T>;
};
  • Creates a new, empty quadtree with an empty extent and the default x- and y-accessors. If data is specified, adds the specified array of data to the quadtree.

  • Creates a new, empty quadtree with an empty extent and the default x- and y-accessors. Adds the specified array of data to the quadtree. Sets the x- and y- accessors to the specified functions before adding the specified array of data to the quadtree.

Interfaces

interface Quadtree

interface Quadtree<T> {}

    method add

    add: (datum: T) => this;
    • Adds the specified datum to the quadtree, deriving its coordinates ⟨x,y⟩ using the current x- and y-accessors, and returns the quadtree. If the new point is outside the current extent of the quadtree, the quadtree is automatically expanded to cover the new point.

      Parameter datum

      The specified datum to add.

    method addAll

    addAll: (data: T[]) => this;
    • Adds the specified array of data to the quadtree, deriving each element’s coordinates ⟨x,y⟩ using the current x- and y-accessors, and return this quadtree. This is approximately equivalent to calling quadtree.add repeatedly. However, this method results in a more compact quadtree because the extent of the data is computed first before adding the data.

      Parameter data

      The specified array of data to add.

    method copy

    copy: () => Quadtree<T>;
    • Returns a copy of the quadtree. All nodes in the returned quadtree are identical copies of the corresponding node in the quadtree; however, any data in the quadtree is shared by reference and not copied.

    method cover

    cover: (x: number, y: number) => this;
    • Expands the quadtree to cover the specified point ⟨x,y⟩, and returns the quadtree. * If the quadtree’s extent already covers the specified point, this method does nothing. * If the quadtree has an extent, the extent is repeatedly doubled to cover the specified point, wrapping the root node as necessary. * If the quadtree is empty, the extent is initialized to the extent [[⌊x⌋, ⌊y⌋], [⌈x⌉, ⌈y⌉]]. Rounding is necessary such that if the extent is later doubled, the boundaries of existing quadrants do not change due to floating point error.

      Parameter x

      The x-coordinate for the specified point to cover.

      Parameter y

      The y-coordinate for the specified point to cover.

    method data

    data: () => T[];
    • Returns an array of all data in the quadtree.

    method extent

    extent: {
    (): [[number, number], [number, number]] | undefined;
    (extend: [[number, number], [number, number]]): this;
    };
    • Returns the quadtree's current extent [[x0, y0], [x1, y1]], where x0 and y0 are the inclusive lower bounds and x1 and y1 are the inclusive upper bounds, or undefined if the quadtree has no extent.

    • Expands the quadtree to cover the specified points [[x0, y0], [x1, y1]] and returns the quadtree. The extent may also be expanded by calling quadtree.cover or quadtree.add.

      Parameter extend

      The specified points to cover.

    method find

    find: (x: number, y: number, radius?: number) => T | undefined;
    • Returns the datum closest to the position ⟨x,y⟩ with the given search radius. If radius is not specified, it defaults to infinity. If there is no datum within the search area, returns undefined.

      Parameter x

      The x-coordinate for the search position.

      Parameter y

      The y-coordinate for the search position.

      Parameter radius

      The optional search radius.

    method remove

    remove: (datum: T) => this;
    • Removes the specified datum to the quadtree, deriving its coordinates ⟨x,y⟩ using the current x- and y-accessors, and returns the quadtree. If the specified datum does not exist in this quadtree, this method does nothing.

      Parameter datum

      The specified datum to remove.

    method removeAll

    removeAll: (data: T[]) => this;
    • Removes the specified data to the quadtree, deriving their coordinates ⟨x,y⟩ using the current x- and y-accessors, and returns the quadtree. If a specified datum does not exist in this quadtree, it is ignored.

      Parameter data

      The specified array of data to remove.

    method root

    root: () => QuadtreeInternalNode<T> | QuadtreeLeaf<T>;
    • Returns the root node of the quadtree.

    method size

    size: () => number;
    • Returns the total number of data in the quadtree.

    method visit

    visit: (
    callback: (
    node: QuadtreeInternalNode<T> | QuadtreeLeaf<T>,
    x0: number,
    y0: number,
    x1: number,
    y1: number
    ) => void | boolean
    ) => this;
    • Visits each node in the quadtree in pre-order traversal, invoking the specified callback with arguments node, x0, y0, x1, y1 for each node, where node is the node being visited, ⟨x0, y0⟩ are the lower bounds of the node, and ⟨x1, y1⟩ are the upper bounds, and returns the quadtree.

      If the callback returns true for a given node, then the children of that node are not visited; otherwise, all child nodes are visited. This can be used to quickly visit only parts of the tree. Note, however, that child quadrants are always visited in sibling order: top-left, top-right, bottom-left, bottom-right. In cases such as search, visiting siblings in a specific order may be faster.

      Parameter callback

      The callback invoked for each node.

    method visitAfter

    visitAfter: (
    callback: (
    node: QuadtreeInternalNode<T> | QuadtreeLeaf<T>,
    x0: number,
    y0: number,
    x1: number,
    y1: number
    ) => void
    ) => this;
    • Visits each node in the quadtree in post-order traversal, invoking the specified callback with arguments node, x0, y0, x1, y1 for each node, where node is the node being visited, ⟨x0, y0⟩ are the lower bounds of the node, and ⟨x1, y1⟩ are the upper bounds, and returns the quadtree.

      Parameter callback

      The callback invoked for each node.

    method x

    x: { (): (d: T) => number; (x: (d: T) => number): this };
    • Returns the current x-accessor, which defaults to: x(d) => d[0].

    • Sets the current x-coordinate accessor and returns the quadtree. The x-accessors must be consistent, returning the same value given the same input.

      Parameter x

      The x-coordinate accessor.

    method y

    y: { (): (d: T) => number; (y: (d: T) => number): this };
    • Returns the current y-accessor, which defaults to: y(d) => d[1].

    • Sets the current y-coordinate accessor and returns the quadtree. The y-accessors must be consistent, returning the same value given the same input.

      Parameter y

      The y-coordinate accessor.

    interface QuadtreeInternalNode

    interface QuadtreeInternalNode<T>
    extends Array<QuadtreeInternalNode<T> | QuadtreeLeaf<T> | undefined> {}
    • Internal nodes of the quadtree are represented as four-element arrays in left-to-right, top-to-bottom order:

      0 - the top-left quadrant, if any. 1 - the top-right quadrant, if any. 2 - the bottom-left quadrant, if any. 3 - the bottom-right quadrant, if any.

      A child quadrant may be undefined if it is empty.

    property length

    length: 4;
    • The length property may be used to distinguish leaf nodes from internal nodes: it is undefined for leaf nodes, and 4 for internal nodes.

    interface QuadtreeLeaf

    interface QuadtreeLeaf<T> {}
    • Leaf node of the quadtree.

    property data

    data: T;
    • The data associated with this point, as passed to quadtree.add.

    property length

    length?: undefined;
    • The length property may be used to distinguish leaf nodes from internal nodes: it is undefined for leaf nodes, and 4 for internal nodes.

    property next

    next?: QuadtreeLeaf<T> | undefined;
    • The next datum in this leaf, if any.

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