/**
 * The arcTo() method creates an arc/curve between two tangents on the canvas.
 *
 * "borrowed" from https://code.google.com/p/fxcanvas/ - thanks google!
 * @param points
 * @param x1
 * @param y1
 * @param x2
 * @param y2
 * @param radius
 */
export declare function buildArcTo(points: number[], x1: number, y1: number, x2: number, y2: number, radius: number): void;