import { Vector } from './Vector';
/** A helper for building vectors efficiently. */
export declare class VectorBuilder {
    /** Creates a new vector builder starting from a vector. */
    fromVector(v: Vector): VectorBuilder;
    /** The x coordinate. */
    x: number;
    /** The y coordinate. */
    y: number;
    /** Constructs a new vector builder starting from x and y coordinates. */
    constructor(x: number, y: number);
    /** Adds the given vector to the vector being built. */
    add(v: Vector): this;
    /** Subtracts the given vector to the vector being built. */
    sub(v: Vector): this;
    /**
     * Scales the coordinates of the vector being built by the given x and y factors.
     * If only one factor is given, it is used for both coordinates.
     */
    scaleBy(kx: number, ky?: number): this;
    /** Returns the built vector. */
    vector(): Vector;
}