/******************************************************************************
 * Spine Runtimes License Agreement
 * Last updated May 1, 2019. Replaces all prior versions.
 *
 * Copyright (c) 2013-2019, Esoteric Software LLC
 *
 * Integration of the Spine Runtimes into software or otherwise creating
 * derivative works of the Spine Runtimes is permitted under the terms and
 * conditions of Section 2 of the Spine Editor License Agreement:
 * http://esotericsoftware.com/spine-editor-license
 *
 * Otherwise, it is permitted to integrate the Spine Runtimes into software
 * or otherwise create derivative works of the Spine Runtimes (collectively,
 * "Products"), provided that each user of the Products must obtain their own
 * Spine Editor license and redistribution of the Products in any form must
 * include this license and copyright notice.
 *
 * THIS SOFTWARE IS PROVIDED BY ESOTERIC SOFTWARE LLC "AS IS" AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
 * NO EVENT SHALL ESOTERIC SOFTWARE LLC BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, BUSINESS
 * INTERRUPTION, OR LOSS OF USE, DATA, OR PROFITS) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *****************************************************************************/
import { ArrayLike, Color } from "./Utils";
import { ClippingAttachment } from "./attachments/ClippingAttachment";
import { Slot } from "./Slot";
export declare class SkeletonClipping {
    private triangulator;
    private clippingPolygon;
    private clipOutput;
    clippedVertices: number[];
    clippedTriangles: number[];
    private scratch;
    private clipAttachment;
    private clippingPolygons;
    clipStart(slot: Slot, clip: ClippingAttachment): number;
    clipEndWithSlot(slot: Slot): void;
    clipEnd(): void;
    isClipping(): boolean;
    clipTriangles(vertices: ArrayLike<number>, verticesLength: number, triangles: ArrayLike<number>, trianglesLength: number, uvs: ArrayLike<number>, light: Color, dark: Color, twoColor: boolean): void;
    /** Clips the input triangle against the convex, clockwise clipping area. If the triangle lies entirely within the clipping
     * area, false is returned. The clipping area must duplicate the first vertex at the end of the vertices list. */
    clip(x1: number, y1: number, x2: number, y2: number, x3: number, y3: number, clippingArea: Array<number>, output: Array<number>): boolean;
    static makeClockwise(polygon: ArrayLike<number>): void;
}