mirror of
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193 lines
6.9 KiB
C++
193 lines
6.9 KiB
C++
/*
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** License Applicability. Except to the extent portions of this file are
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** made subject to an alternative license as permitted in the SGI Free
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** Software License B, Version 1.1 (the "License"), the contents of this
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** file are subject only to the provisions of the License. You may not use
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** this file except in compliance with the License. You may obtain a copy
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** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
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** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
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**
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** http://oss.sgi.com/projects/FreeB
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**
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** Note that, as provided in the License, the Software is distributed on an
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** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
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** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
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** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
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** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
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**
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** Original Code. The Original Code is: OpenGL Sample Implementation,
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** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
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** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
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** Copyright in any portions created by third parties is as indicated
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** elsewhere herein. All Rights Reserved.
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**
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** Additional Notice Provisions: The application programming interfaces
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** established by SGI in conjunction with the Original Code are The
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** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
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** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
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** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
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** Window System(R) (Version 1.3), released October 19, 1998. This software
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** was created using the OpenGL(R) version 1.2.1 Sample Implementation
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** published by SGI, but has not been independently verified as being
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** compliant with the OpenGL(R) version 1.2.1 Specification.
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**
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** $Date$ $Revision: 1.1 $
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*/
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/*
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** $Header: /cygdrive/c/RCVS/CVS/ReactOS/reactos/lib/glu32/libnurbs/nurbtess/monoTriangulation.h,v 1.1 2004/02/02 16:39:13 navaraf Exp $
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*/
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#ifndef _MONO_TRIANGULATION_H
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#define _MONO_TRIANGULATION_H
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#include "definitions.h"
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#include "primitiveStream.h"
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#include "directedLine.h"
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class Backend;
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class Arc;
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typedef Arc *Arc_ptr;
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class reflexChain{
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Real2 *queue;
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/*the order of the polygon vertices: either q[0],q[1].., or
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* q[n-1], q[n-2], ..., q[0]
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*this order determines the interior of the polygon, so it
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*also used to determines whether a chain is reflex or convex
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*/
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Int isIncreasing;
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Int index_queue;
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Int size_queue; /*allocated size*/
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public:
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reflexChain(Int size, Int isIncreasing);
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~reflexChain();
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void insert(Real u, Real v);
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void insert(Real v[2]);
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void processNewVertex(Real v[2], primStream* pStream);
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void outputFan(Real v[2], primStream* pStream);
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void processNewVertex(Real v[2], Backend* backend);
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void outputFan(Real v[2], Backend* backend);
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void print();
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};
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/*dynamic array of pointers to reals.
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*Intended to store an array of (u,v).
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*Notice that it doesn't allocate or dealocate the space
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*for the (u,v) themselfs. So it assums that someone else
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*is taking care of them, while this class only plays with
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*the pointers.
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*/
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class vertexArray{
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Real** array;
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Int index;
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Int size;
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public:
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vertexArray(Int s);
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vertexArray(Real vertices[][2], Int nVertices);
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~vertexArray();
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void appendVertex(Real* ptr); /*the content (pointed by ptr is NOT copied*/
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Real* getVertex(Int i) {return array[i];}
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Real** getArray() {return array;}
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Int getNumElements() {return index;}
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Int findIndexAbove(Real v);
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Int findIndexAboveGen(Real v, Int startIndex, Int EndIndex);
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Int findIndexBelowGen(Real v, Int startIndex, Int EndIndex);
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Int findIndexStrictBelowGen(Real v, Int startIndex, Int EndIndex);
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Int findIndexFirstAboveEqualGen(Real v, Int startIndex, Int endIndex);
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Int skipEqualityFromStart(Real v, Int start, Int end);
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//return i such that fron [i+1, end] is strictly U-monotone (left to right
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Int findDecreaseChainFromEnd(Int begin, Int end);
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void print();
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};
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void monoTriangulation(directedLine* monoPolygon, primStream* pStream);
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void monoTriangulationRec(Real* topVertex, Real* botVertex,
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vertexArray* inc_chain, Int inc_current,
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vertexArray* dec_chain, Int dec_current,
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primStream* pStream);
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void monoTriangulationRec(directedLine* inc_chain, Int inc_index,
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directedLine* dec_chain, Int dec_index,
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directedLine* topVertex, Int top_index,
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directedLine* botVertex,
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primStream* pStream);
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/*the chain could be increasing or decreasing, although we use the
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* name inc_chain.
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*the argument is_increase_chain indicates whether this chain
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*is increasing (left chain in V-monotone case) or decreaing (right chain
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*in V-monotone case).
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*/
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void monoTriangulation2(Real* topVertex, Real* botVertex,
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vertexArray* inc_chain, Int inc_smallIndex,
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Int inc_largeIndex,
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Int is_increase_chain,
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primStream* pStream);
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void monoTriangulationRecGen(Real* topVertex, Real* botVertex,
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vertexArray* inc_chain, Int inc_current, Int inc_end,
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vertexArray* dec_chain, Int dec_current, Int dec_end,
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primStream* pStream);
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void monoTriangulationRecGenOpt(Real* topVertex, Real* botVertex,
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vertexArray* inc_chain, Int inc_current, Int inc_end,
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vertexArray* dec_chain, Int dec_current, Int dec_end,
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primStream* pStream);
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void triangulateXYMonoTB(Int n_left, Real** leftVerts,
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Int n_right, Real** rightVerts,
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primStream* pStream);
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void monoTriangulationRecGenTBOpt(Real* topVertex, Real* botVertex,
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vertexArray* inc_chain, Int inc_current, Int inc_end,
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vertexArray* dec_chain, Int dec_current, Int dec_end,
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primStream* pStream);
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void monoTriangulationRecOpt(Real* topVertex, Real* botVertex,
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vertexArray* left_chain, Int left_current,
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vertexArray* right_chain, Int right_current,
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primStream* pStream);
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void monoTriangulationRecFunGen(Real* topVertex, Real* botVertex,
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vertexArray* inc_chain, Int inc_current, Int inc_end,
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vertexArray* dec_chain, Int dec_current, Int dec_end,
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Int (*compFun)(Real*, Real*),
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primStream* pStream);
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void monoTriangulationRecFun(Real* topVertex, Real* botVertex,
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vertexArray* inc_chain, Int inc_current,
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vertexArray* dec_chain, Int dec_current,
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Int (*compFun)(Real*, Real*),
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primStream* pStream);
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void monoTriangulationFun(directedLine* monoPolygon,
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Int (*compFun)(Real*, Real*), primStream* pStream);
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void monoTriangulationRec(Real* topVertex, Real* botVertex,
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vertexArray* inc_chain, Int inc_current,
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vertexArray* dec_chain, Int dec_current,
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Backend* backend);
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void monoTriangulationFunBackend(Arc_ptr loop, Int (*compFun)(Real*, Real*), Backend* backend);
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void monoTriangulationRecFunBackend(Real* topVertex, Real* botVertex,
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vertexArray* inc_chain, Int inc_current,
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vertexArray* dec_chain, Int dec_current,
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Int (*compFun)(Real*, Real*),
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Backend* backend);
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void monoTriangulationOpt(directedLine* poly, primStream* pStream);
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#endif
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