liangchengyou / wow_english

  /******************************************************************************

   * 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.

   *****************************************************************************/
  

  #ifndef Spine_SkeletonClipping_h
  #define Spine_SkeletonClipping_h

  #include <spine/Vector.h>

  #include <spine/Triangulator.h>
  

  namespace spine {
  	class Slot;
  	class ClippingAttachment;
  
  	class SP_API SkeletonClipping : public SpineObject {
  	public:
  		SkeletonClipping();
  
  		size_t clipStart(Slot& slot, ClippingAttachment* clip);
  
  		void clipEnd(Slot& slot);
  
  		void clipEnd();
  
  		void clipTriangles(float* vertices, unsigned short* triangles, size_t trianglesLength, float* uvs, size_t stride);
  
  		void clipTriangles(Vector<float>& vertices, Vector<unsigned short>& triangles, Vector<float>& uvs, size_t stride);
  
  		bool isClipping();
  
  		Vector<float>& getClippedVertices();
  		Vector<unsigned short>& getClippedTriangles();
  		Vector<float>& getClippedUVs();

  	private:
  		Triangulator _triangulator;
  		Vector<float> _clippingPolygon;
  		Vector<float> _clipOutput;
  		Vector<float> _clippedVertices;
  		Vector<unsigned short> _clippedTriangles;
  		Vector<float> _clippedUVs;
  		Vector<float> _scratch;
  		ClippingAttachment* _clipAttachment;
  		Vector< Vector<float>* > *_clippingPolygons;

  		/** 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. */
  		bool clip(float x1, float y1, float x2, float y2, float x3, float y3, Vector<float>* clippingArea, Vector<float>* output);

  		static void makeClockwise(Vector<float>& polygon);
  	};

  }

  #endif /* Spine_SkeletonClipping_h */