| 1 | // Copyright (C) 2006 Erik Dahlberg |
| 2 | // |
| 3 | // This file is part of LSystem3D. |
| 4 | // |
| 5 | // LSystem3D is free software; you can redistribute it and/or |
| 6 | // modify it under the terms of the GNU General Public License |
| 7 | // as published by the Free Software Foundation; either version 2 |
| 8 | // of the License, or (at your option) any later version. |
| 9 | // |
| 10 | // LSystem3D is distributed in the hope that it will be useful, |
| 11 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | // GNU General Public License for more details. |
| 14 | // |
| 15 | // You should have received a copy of the GNU General Public License |
| 16 | // along with LSystem3D; if not, write to the Free Software |
| 17 | // Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 18 | |
| 19 | |
| 20 | |
| 21 | |
| 22 | #include <string> |
| 23 | |
| 24 | #include <glibmm/stringutils.h> |
| 25 | |
| 26 | #include "rule.h" |
| 27 | |
| 28 | using namespace std; |
| 29 | |
| 30 | |
| 31 | |
| 32 | /** |
| 33 | * Constructor |
| 34 | */ |
| 35 | Rule::Rule() |
| 36 | { |
| 37 | clear(); |
| 38 | } |
| 39 | |
| 40 | |
| 41 | |
| 42 | /** |
| 43 | * Constructor |
| 44 | * @param name name of rule |
| 45 | * @param content content of rule |
| 46 | * @param probability probability of rule |
| 47 | */ |
| 48 | Rule::Rule(string name, string content, double probability) |
| 49 | { |
| 50 | setName(name); |
| 51 | setContent(content); |
| 52 | setProbability(probability); |
| 53 | } |
| 54 | |
| 55 | |
| 56 | |
| 57 | /** |
| 58 | * Constructor |
| 59 | * @param ruleString the rule string |
| 60 | */ |
| 61 | Rule::Rule(string ruleString) |
| 62 | { |
| 63 | fromString(ruleString); |
| 64 | } |
| 65 | |
| 66 | |
| 67 | |
| 68 | /** |
| 69 | * Destructor |
| 70 | */ |
| 71 | Rule::~Rule() |
| 72 | { |
| 73 | } |
| 74 | |
| 75 | |
| 76 | |
| 77 | /** |
| 78 | * Clear rule |
| 79 | */ |
| 80 | void Rule::clear() |
| 81 | { |
| 82 | _name.clear(); |
| 83 | _content.clear(); |
| 84 | _probability = 0.0; |
| 85 | } |
| 86 | |
| 87 | |
| 88 | |
| 89 | /** |
| 90 | * Construct rule from string |
| 91 | * @param ruleString the rule string |
| 92 | */ |
| 93 | void Rule::fromString(string ruleString) |
| 94 | { |
| 95 | // name |
| 96 | setName(ruleString.substr(0, 1)); |
| 97 | |
| 98 | |
| 99 | // probability factor |
| 100 | |
| 101 | int i = 2; |
| 102 | |
| 103 | if (ruleString[1] == '=') |
| 104 | { |
| 105 | // use default probability |
| 106 | setProbability(1.0); |
| 107 | } |
| 108 | else if (ruleString[1] == '(') |
| 109 | { |
| 110 | // set probability |
| 111 | while (ruleString[i] != ')') |
| 112 | { |
| 113 | i++; |
| 114 | } |
| 115 | setProbability(Glib::Ascii::strtod(string(ruleString, 2, i - 2))); |
| 116 | |
| 117 | // ignore the '=' |
| 118 | i += 2; |
| 119 | } |
| 120 | |
| 121 | // content |
| 122 | setContent(string(ruleString, i)); |
| 123 | } |
| 124 | |
| 125 | |
| 126 | |
| 127 | /** |
| 128 | * Construct rule string |
| 129 | * @return the rule string |
| 130 | */ |
| 131 | string Rule::toString() |
| 132 | { |
| 133 | // name |
| 134 | string rulesString = getName(); |
| 135 | |
| 136 | |
| 137 | // probability factor |
| 138 | |
| 139 | if (_probability != 0.0) |
| 140 | { |
| 141 | // TODO: precision |
| 142 | string probabilityString(Glib::Ascii::dtostr(getProbability()), 0, 4); |
| 143 | |
| 144 | rulesString += '('; |
| 145 | rulesString += probabilityString; |
| 146 | rulesString += ')'; |
| 147 | } |
| 148 | |
| 149 | |
| 150 | rulesString += '='; |
| 151 | |
| 152 | |
| 153 | // content |
| 154 | rulesString += getContent(); |
| 155 | |
| 156 | |
| 157 | return rulesString; |
| 158 | } |
| 159 | |
| 160 | |
| 161 | |
| 162 | /** |
| 163 | * Set rule name |
| 164 | * @param name the name |
| 165 | */ |
| 166 | void Rule::setName(string name) |
| 167 | { |
| 168 | _name = name; |
| 169 | } |
| 170 | |
| 171 | |
| 172 | |
| 173 | /** |
| 174 | * Set rule content |
| 175 | * @param content the content |
| 176 | */ |
| 177 | void Rule::setContent(string content) |
| 178 | { |
| 179 | string preprocessedRule; |
| 180 | |
| 181 | // preprocess the rule content |
| 182 | for (int i = 0; i < content.size(); i++) |
| 183 | { |
| 184 | // TODO: allow string as name |
| 185 | if (content[i] >= 'A' && content[i] <= 'Z' && content[i] != 'F') |
| 186 | { |
| 187 | // add rule operator |
| 188 | preprocessedRule += '@'; |
| 189 | } |
| 190 | preprocessedRule += content[i]; |
| 191 | } |
| 192 | |
| 193 | _content = preprocessedRule; |
| 194 | } |
| 195 | |
| 196 | |
| 197 | |
| 198 | /** |
| 199 | * Set rule probability |
| 200 | * @param probability the probability factor |
| 201 | */ |
| 202 | void Rule::setProbability(double probability) |
| 203 | { |
| 204 | if (probability >= 0 && probability <= 1) |
| 205 | { |
| 206 | _probability = probability; |
| 207 | } |
| 208 | else |
| 209 | { |
| 210 | probability = 0.0; |
| 211 | } |
| 212 | } |
| 213 | |
| 214 | |
| 215 | |
| 216 | /** |
| 217 | * Get rule name |
| 218 | * @return the rule name |
| 219 | */ |
| 220 | string Rule::getName() |
| 221 | { |
| 222 | return _name; |
| 223 | } |
| 224 | |
| 225 | |
| 226 | |
| 227 | /** |
| 228 | * Get rule content |
| 229 | * @return the rule content |
| 230 | */ |
| 231 | string Rule::getContent() |
| 232 | { |
| 233 | string unpreprocessedRule; |
| 234 | |
| 235 | // unpreprocess the rule content |
| 236 | for (int i = 0; i < _content.size(); i++) |
| 237 | { |
| 238 | if (_content[i] != '@') |
| 239 | { |
| 240 | unpreprocessedRule += _content[i]; |
| 241 | } |
| 242 | } |
| 243 | |
| 244 | return unpreprocessedRule; |
| 245 | } |
| 246 | |
| 247 | |
| 248 | |
| 249 | /** |
| 250 | * Get rule probability |
| 251 | * @return the probability |
| 252 | */ |
| 253 | double Rule::getProbability() |
| 254 | { |
| 255 | return _probability; |
| 256 | } |
| 257 | |
| 258 | |
| 259 | |
| 260 | /** |
| 261 | * Get preprocessed content |
| 262 | * @return the preprocessed content |
| 263 | */ |
| 264 | string Rule::getPreprocessedContent() |
| 265 | { |
| 266 | return _content; |
| 267 | } |