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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 | } |