1 | /* |
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2 | gfan.h Interface to gfan.cc |
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3 | |
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4 | $Author: monerjan $ |
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5 | $Date: 2009/11/03 06:57:32 $ |
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6 | $Header: /usr/local/Singular/cvsroot/kernel/gfan.h,v 1.13 2009/11/03 06:57:32 monerjan Exp $ |
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7 | $Id$ |
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8 | */ |
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9 | #ifdef HAVE_GFAN |
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10 | |
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11 | #ifndef GFAN_H |
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12 | #define GFAN_H |
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13 | |
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14 | #include "intvec.h" |
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15 | |
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16 | #define p800 |
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17 | #ifdef p800 |
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18 | #include "../../cddlib/include/setoper.h" |
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19 | #include "../../cddlib/include/cdd.h" |
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20 | #include "../../cddlib/include/cddmp.h" |
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21 | #endif |
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22 | extern int gfanHeuristic; |
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23 | //ideal getGB(ideal inputIdeal); |
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24 | // ideal gfan(ideal inputIdeal, int heuristic); |
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25 | lists gfan(ideal inputIdeal, int heuristic); |
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26 | |
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27 | //int dotProduct(intvec a, intvec b); |
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28 | //bool isParallel(intvec a, intvec b); |
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29 | |
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30 | class facet |
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31 | { |
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32 | private: |
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33 | /** \brief Inner normal of the facet, describing it uniquely up to isomorphism */ |
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34 | intvec *fNormal; |
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35 | |
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36 | /** \brief An interior point of the facet*/ |
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37 | intvec *interiorPoint; |
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38 | |
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39 | /** \brief Universal Cone Number |
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40 | * The number of the cone the facet belongs to, Set in getConeNormals() |
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41 | */ |
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42 | int UCN; |
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43 | |
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44 | /** \brief The codim of the facet |
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45 | */ |
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46 | int codim; |
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47 | |
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48 | /** \brief The Groebner basis on the other side of a shared facet |
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49 | * |
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50 | * In order not to have to compute the flipped GB twice we store the basis we already get |
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51 | * when identifying search facets. Thus in the next step of the reverse search we can |
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52 | * just copy the old cone and update the facet and the gcBasis. |
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53 | * facet::flibGB is set via facet::setFlipGB() and printed via facet::printFlipGB |
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54 | */ |
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55 | ideal flipGB; //The Groebner Basis on the other side, computed via gcone::flip |
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56 | |
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57 | public: |
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58 | /** \brief Boolean value to indicate whether a facet is flippable or not |
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59 | * This is also used to mark facets that nominally are flippable but which do |
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60 | * not intersect with the positive orthant. This check is done in gcone::getCodim2Normals |
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61 | */ |
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62 | bool isFlippable; //**flippable facet? */ |
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63 | bool isIncoming; //Is the facet incoming or outgoing in the reverse search? |
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64 | facet *next; //Pointer to next facet |
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65 | facet *prev; //Pointer to predecessor. Needed for the SearchList in noRevS |
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66 | facet *codim2Ptr; //Pointer to (codim-2)-facet. Bit of recursion here ;-) |
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67 | int numCodim2Facets; //#of (codim-2)-facets of this facet. Set in getCodim2Normals() |
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68 | ring flipRing; //the ring on the other side of the facet |
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69 | |
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70 | /** The default constructor. */ |
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71 | facet(); |
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72 | /** Constructor for lower dimensional faces*/ |
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73 | facet(int const &n); |
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74 | /** The copy constructor */ |
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75 | facet(const facet& f); |
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76 | |
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77 | /** The default destructor */ |
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78 | ~facet(); |
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79 | |
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80 | /** \brief Comparison of facets*/ |
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81 | bool areEqual(facet &f, facet &g); |
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82 | /** Stores the facet normal \param intvec*/ |
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83 | void setFacetNormal(intvec *iv); |
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84 | /** Hopefully returns the facet normal */ |
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85 | intvec *getFacetNormal(); |
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86 | /** Method to print the facet normal*/ |
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87 | void printNormal(); |
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88 | /** Store the flipped GB*/ |
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89 | void setFlipGB(ideal I); |
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90 | /** Return the flipped GB*/ |
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91 | ideal getFlipGB(); |
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92 | /** Print the flipped GB*/ |
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93 | void printFlipGB(); |
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94 | /** Set the UCN */ |
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95 | void setUCN(int n); |
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96 | /** \brief Get the UCN |
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97 | * Returns the UCN iff this != NULL, else -1 |
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98 | */ |
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99 | int getUCN(); |
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100 | /** Store an interior point of the facet */ |
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101 | void setInteriorPoint(intvec *iv); |
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102 | intvec *getInteriorPoint(); |
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103 | /** \brief Debugging function |
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104 | * prints the facet normal an all (codim-2)-facets that belong to it |
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105 | */ |
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106 | void fDebugPrint(); |
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107 | |
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108 | friend class gcone; |
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109 | }; |
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110 | |
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111 | /** |
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112 | *\brief Implements the cone structure |
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113 | * |
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114 | * A cone is represented by a linked list of facet normals |
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115 | * @see facet |
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116 | */ |
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117 | |
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118 | class gcone |
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119 | { |
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120 | private: |
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121 | // ring rootRing; //good to know this -> generic walk |
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122 | ideal inputIdeal; //the original |
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123 | ring baseRing; //the basering of the cone |
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124 | intvec *ivIntPt; //an interior point of the cone |
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125 | int UCN; //unique number of the cone |
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126 | int pred; //UCN of the cone this one is derived from |
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127 | static int counter; |
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128 | |
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129 | public: |
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130 | /** \brief Pointer to the first facet */ |
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131 | facet *facetPtr; //Will hold the adress of the first facet; set by gcone::getConeNormals |
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132 | |
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133 | /** # of variables in the ring */ |
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134 | int numVars; //#of variables in the ring |
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135 | |
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136 | /** # of facets of the cone |
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137 | * This value is set by gcone::getConeNormals |
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138 | */ |
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139 | int numFacets; //#of facets of the cone |
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140 | |
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141 | /** |
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142 | * At least as a workaround we store the irredundant facets of a matrix here. |
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143 | * Otherwise, since we throw away non-flippable facets, facets2Matrix will not |
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144 | * yield all the necessary information |
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145 | */ |
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146 | dd_MatrixPtr ddFacets; //Matrix to store irredundant facets of the cone |
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147 | |
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148 | /** Contains the Groebner basis of the cone. Is set by gcone::getGB(ideal I)*/ |
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149 | ideal gcBasis; //GB of the cone, set by gcone::getGB(); |
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150 | gcone *next; //Pointer to next cone |
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151 | gcone *prev; |
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152 | |
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153 | gcone(); |
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154 | gcone(ring r, ideal I); |
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155 | gcone(const gcone& gc, const facet &f); |
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156 | ~gcone(); |
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157 | int getCounter(); |
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158 | ring getBaseRing(); |
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159 | void setIntPoint(intvec *iv); |
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160 | intvec *getIntPoint(); |
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161 | void showIntPoint(); |
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162 | void setNumFacets(); |
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163 | int getNumFacets(); |
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164 | int getUCN(); |
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165 | int getPredUCN(); |
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166 | void showFacets(short codim=1); |
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167 | volatile void showSLA(facet &f); |
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168 | void idDebugPrint(ideal const &I); |
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169 | void invPrint(ideal const &I); |
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170 | bool isMonomial(ideal const &I); |
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171 | intvec *ivNeg(const intvec *iv); |
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172 | int dotProduct(intvec const &iva, intvec const &ivb); |
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173 | bool isParallel(intvec const &a, intvec const &b); |
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174 | bool areEqual(intvec const &a, intvec const &b); |
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175 | int intgcd(int a, int b); |
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176 | void writeConeToFile(gcone const &gc, bool usingIntPoints=FALSE); |
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177 | void readConeFromFile(int gcNum, gcone *gc); |
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178 | intvec f2M(gcone *gc, facet *f, int n=1); |
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179 | |
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180 | //The real stuff |
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181 | void getConeNormals(ideal const &I, bool compIntPoint=FALSE); |
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182 | void getCodim2Normals(gcone const &gc); |
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183 | void flip(ideal gb, facet *f); |
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184 | void computeInv(ideal &gb, ideal &inv, intvec &f); |
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185 | // poly restOfDiv(poly const &f, ideal const &I); removed with r12286 |
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186 | ideal ffG(ideal const &H, ideal const &G); |
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187 | void getGB(ideal const &inputIdeal); |
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188 | void interiorPoint(dd_MatrixPtr const &M, intvec &iv); |
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189 | ring rCopyAndAddWeight(ring const &r, intvec const *ivw); |
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190 | ring rCopyAndChangeWeight(ring const &r, intvec *ivw); |
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191 | // void reverseSearch(gcone *gcAct); //NOTE both removed from r12286 |
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192 | // bool isSearchFacet(gcone &gcTmp, facet *testfacet); |
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193 | void noRevS(gcone &gcRoot, bool usingIntPoint=FALSE); |
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194 | void makeInt(dd_MatrixPtr const &M, int const line, intvec &n); |
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195 | void normalize(); |
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196 | facet * enqueueNewFacets(facet &f); |
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197 | dd_MatrixPtr facets2Matrix(gcone const &gc); |
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198 | // static void gcone::idPrint(ideal &I); |
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199 | friend class facet; |
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200 | }; |
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201 | lists lprepareResult(gcone *gc, int n); |
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202 | #endif |
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203 | #endif |
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