--- /dev/null
+/*
+ * SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
+ * Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice including the dates of first publication and
+ * either this permission notice or a reference to
+ * http://oss.sgi.com/projects/FreeB/
+ * shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
+ * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * Except as contained in this notice, the name of Silicon Graphics, Inc.
+ * shall not be used in advertising or otherwise to promote the sale, use or
+ * other dealings in this Software without prior written authorization from
+ * Silicon Graphics, Inc.
+ */
+/*
+*/
+
+#ifndef _MONO_TRIANGULATION_H
+#define _MONO_TRIANGULATION_H
+
+#include "definitions.h"
+#include "primitiveStream.h"
+#include "directedLine.h"
+#include "arc.h"
+
+class Backend;
+
+class reflexChain{
+ Real2 *queue;
+ /*the order of the polygon vertices: either q[0],q[1].., or
+ * q[n-1], q[n-2], ..., q[0]
+ *this order determines the interior of the polygon, so it
+ *also used to determines whether a chain is reflex or convex
+ */
+ Int isIncreasing;
+ Int index_queue;
+ Int size_queue; /*allocated size*/
+
+public:
+ reflexChain(Int size, Int isIncreasing);
+ ~reflexChain();
+
+ void insert(Real u, Real v);
+ void insert(Real v[2]);
+
+ void processNewVertex(Real v[2], primStream* pStream);
+ void outputFan(Real v[2], primStream* pStream);
+
+ void processNewVertex(Real v[2], Backend* backend);
+ void outputFan(Real v[2], Backend* backend);
+
+ void print();
+};
+
+/*dynamic array of pointers to reals.
+ *Intended to store an array of (u,v).
+ *Notice that it doesn't allocate or dealocate the space
+ *for the (u,v) themselfs. So it assums that someone else
+ *is taking care of them, while this class only plays with
+ *the pointers.
+ */
+class vertexArray{
+ Real** array;
+ Int index;
+ Int size;
+public:
+ vertexArray(Int s);
+ vertexArray(Real vertices[][2], Int nVertices);
+ ~vertexArray();
+ void appendVertex(Real* ptr); /*the content (pointed by ptr is NOT copied*/
+ Real* getVertex(Int i) {return array[i];}
+ Real** getArray() {return array;}
+ Int getNumElements() {return index;}
+ Int findIndexAbove(Real v);
+ Int findIndexAboveGen(Real v, Int startIndex, Int EndIndex);
+ Int findIndexBelowGen(Real v, Int startIndex, Int EndIndex);
+ Int findIndexStrictBelowGen(Real v, Int startIndex, Int EndIndex);
+ Int findIndexFirstAboveEqualGen(Real v, Int startIndex, Int endIndex);
+ Int skipEqualityFromStart(Real v, Int start, Int end);
+ //return i such that fron [i+1, end] is strictly U-monotone (left to right
+ Int findDecreaseChainFromEnd(Int begin, Int end);
+ void print();
+};
+
+void monoTriangulation(directedLine* monoPolygon, primStream* pStream);
+
+void monoTriangulationRec(Real* topVertex, Real* botVertex,
+ vertexArray* inc_chain, Int inc_current,
+ vertexArray* dec_chain, Int dec_current,
+ primStream* pStream);
+
+void monoTriangulationRec(directedLine* inc_chain, Int inc_index,
+ directedLine* dec_chain, Int dec_index,
+ directedLine* topVertex, Int top_index,
+ directedLine* botVertex,
+ primStream* pStream);
+
+/*the chain could be increasing or decreasing, although we use the
+ * name inc_chain.
+ *the argument is_increase_chain indicates whether this chain
+ *is increasing (left chain in V-monotone case) or decreaing (right chain
+ *in V-monotone case).
+ */
+void monoTriangulation2(Real* topVertex, Real* botVertex,
+ vertexArray* inc_chain, Int inc_smallIndex,
+ Int inc_largeIndex,
+ Int is_increase_chain,
+ primStream* pStream);
+void monoTriangulationRecGen(Real* topVertex, Real* botVertex,
+ vertexArray* inc_chain, Int inc_current, Int inc_end,
+ vertexArray* dec_chain, Int dec_current, Int dec_end,
+ primStream* pStream);
+
+void monoTriangulationRecGenOpt(Real* topVertex, Real* botVertex,
+ vertexArray* inc_chain, Int inc_current, Int inc_end,
+ vertexArray* dec_chain, Int dec_current, Int dec_end,
+ primStream* pStream);
+
+void triangulateXYMonoTB(Int n_left, Real** leftVerts,
+ Int n_right, Real** rightVerts,
+ primStream* pStream);
+
+void monoTriangulationRecGenTBOpt(Real* topVertex, Real* botVertex,
+ vertexArray* inc_chain, Int inc_current, Int inc_end,
+ vertexArray* dec_chain, Int dec_current, Int dec_end,
+ primStream* pStream);
+
+void monoTriangulationRecOpt(Real* topVertex, Real* botVertex,
+ vertexArray* left_chain, Int left_current,
+ vertexArray* right_chain, Int right_current,
+ primStream* pStream);
+
+void monoTriangulationRecFunGen(Real* topVertex, Real* botVertex,
+ vertexArray* inc_chain, Int inc_current, Int inc_end,
+ vertexArray* dec_chain, Int dec_current, Int dec_end,
+ Int (*compFun)(Real*, Real*),
+ primStream* pStream);
+
+void monoTriangulationRecFun(Real* topVertex, Real* botVertex,
+ vertexArray* inc_chain, Int inc_current,
+ vertexArray* dec_chain, Int dec_current,
+ Int (*compFun)(Real*, Real*),
+ primStream* pStream);
+void monoTriangulationFun(directedLine* monoPolygon,
+ Int (*compFun)(Real*, Real*), primStream* pStream);
+
+
+
+
+void monoTriangulationRec(Real* topVertex, Real* botVertex,
+ vertexArray* inc_chain, Int inc_current,
+ vertexArray* dec_chain, Int dec_current,
+ Backend* backend);
+
+void monoTriangulationFunBackend(Arc_ptr loop, Int (*compFun)(Real*, Real*), Backend* backend);
+
+void monoTriangulationRecFunBackend(Real* topVertex, Real* botVertex,
+ vertexArray* inc_chain, Int inc_current,
+ vertexArray* dec_chain, Int dec_current,
+ Int (*compFun)(Real*, Real*),
+ Backend* backend);
+
+void monoTriangulationOpt(directedLine* poly, primStream* pStream);
+
+#endif
+
+
+
+
projects / reactos.git / blobdiff