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1 | // Copyright (C) 2006 Erik Dahlberg |
2 | // |
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3 | // This file is part of LSystem3D. |
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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 | |
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22 | #include <vector> |
23 | |
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24 | #include "GL/gl.h" |
25 | #include "GL/glu.h" |
26 | |
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27 | #include "color.h" |
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28 | #include "model.h" |
29 | #include "vector.h" |
30 | |
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31 | using namespace std; |
32 | |
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33 | |
34 | |
35 | /** |
36 | * Constructor |
37 | */ |
38 | Model::Model() |
39 | { |
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40 | // default color table |
41 | Color brown(0.5, 0.2, 0.0); _colorTable.push_back(brown); |
42 | Color white(1.0, 1.0, 1.0); _colorTable.push_back(white); |
43 | Color green(0.0, 0.5, 0.0); _colorTable.push_back(green); |
44 | |
45 | _displayList = 0; |
46 | |
47 | clear(); |
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48 | } |
49 | |
50 | |
51 | |
52 | /** |
53 | * Destructor |
54 | */ |
55 | Model::~Model() |
56 | { |
57 | glDeleteLists(_displayList, 1); |
58 | } |
59 | |
60 | |
61 | |
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62 | /** |
63 | * Clear the model |
64 | */ |
65 | void Model::clear() |
66 | { |
67 | glDeleteLists(_displayList, 1); |
68 | _displayList = glGenLists(1); |
69 | |
70 | setColorIndex(0); |
71 | |
72 | _diameter = 0.1; |
73 | _diameterFactor = 0.8; |
74 | } |
75 | |
76 | |
77 | |
78 | /** |
79 | * Render to screen |
80 | */ |
81 | void Model::draw() |
82 | { |
83 | glCallList(_displayList); |
84 | } |
85 | |
86 | |
87 | |
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88 | /** |
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89 | * Create a segment |
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90 | * @param x1 x start point |
91 | * @param y1 y start point |
92 | * @param z1 z start point |
93 | * @param x2 x end point |
94 | * @param y2 y end point |
95 | * @param z2 z end point |
96 | */ |
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97 | void Model::segment(double x1, double y1, double z1, double x2, double y2, double z2) |
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98 | { |
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99 | // find rotation vector and angle |
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100 | |
101 | Vector initial(0.0, 1.0, 0.0); // initial rotation of cylinder |
102 | Vector desired(x2-x1, y2-y1, z2-z1); // desired rotation of cylinder |
103 | desired.normalize(); |
104 | |
105 | // rotation angle |
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106 | double rotationAngle = initial.getAngle(desired); |
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107 | |
108 | // rotation vector |
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109 | Vector rotationVector = initial.getCrossProduct(desired); |
110 | rotationVector.normalize(); |
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111 | |
112 | |
113 | // render the cylinder |
114 | |
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115 | static GLUquadric *quadric = gluNewQuadric(); |
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116 | |
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117 | glPushMatrix(); |
118 | glTranslatef(x1, y1, z1); |
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119 | glRotatef(rotationAngle, rotationVector.getX(), rotationVector.getY(), rotationVector.getZ()); |
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120 | glRotatef(-90, 1, 0, 0); |
121 | |
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122 | gluCylinder(quadric, _diameter, _diameter, 1.0, 6, 6); |
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123 | glPopMatrix(); |
124 | } |
125 | |
126 | |
127 | |
128 | /** |
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129 | * Specify a vertex |
130 | * @param x x-coordinate |
131 | * @param y y-coordinate |
132 | * @param z z-coordinate |
133 | */ |
134 | void Model::vertex(double x, double y, double z) |
135 | { |
136 | glVertex3d(x, y, z); |
137 | } |
138 | |
139 | |
140 | |
141 | /** |
142 | * Specify a normal |
143 | * @param x x-coordinate |
144 | * @param y y-coordinate |
145 | * @param z z-coordinate |
146 | */ |
147 | void Model::normal(double x, double y, double z) |
148 | { |
149 | glNormal3f(x, y, z); |
150 | } |
151 | |
152 | |
153 | |
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154 | /** |
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155 | * Begin a modelling session |
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156 | */ |
157 | void Model::begin() |
158 | { |
159 | glNewList(_displayList, GL_COMPILE); |
160 | } |
161 | |
162 | |
163 | |
164 | /** |
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165 | * End a modelling session |
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166 | */ |
167 | void Model::end() |
168 | { |
169 | glEndList(); |
170 | } |
171 | |
172 | |
173 | |
174 | /** |
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175 | * Begin creation of a filled polygon |
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176 | */ |
177 | void Model::fillBegin() |
178 | { |
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179 | glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, 1); |
180 | |
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181 | glBegin(GL_POLYGON); |
182 | } |
183 | |
184 | |
185 | |
186 | /** |
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187 | * End creation of a filled polygon |
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188 | */ |
189 | void Model::fillEnd() |
190 | { |
191 | glEnd(); |
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192 | |
193 | glLightModeli(GL_LIGHT_MODEL_TWO_SIDE, 0); |
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194 | } |
195 | |
196 | |
197 | |
198 | /** |
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199 | * Increment current index to color table |
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200 | */ |
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201 | void Model::nextColor() |
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202 | { |
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203 | setColorIndex(_colorIndex + 1); |
204 | } |
205 | |
206 | |
207 | |
208 | /** |
209 | * Decrement current index to color table |
210 | */ |
211 | void Model::prevColor() |
212 | { |
213 | setColorIndex(_colorIndex - 1); |
214 | } |
215 | |
216 | |
217 | |
218 | /** |
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219 | * Decrement segment diameter |
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220 | */ |
221 | void Model::decrementDiameter() |
222 | { |
223 | _diameter *= _diameterFactor; |
224 | } |
225 | |
226 | |
227 | |
228 | /** |
229 | * Set current color index |
230 | * @param index the color index |
231 | */ |
232 | void Model::setColorIndex(int index) |
233 | { |
234 | // keep in range |
235 | |
236 | if (index < 0) |
237 | { |
238 | _colorIndex = _colorTable.size() - 1; |
239 | } |
240 | else if (index > (_colorTable.size() - 1)) |
241 | { |
242 | _colorIndex = 0; |
243 | } |
244 | else |
245 | { |
246 | _colorIndex = index; |
247 | } |
248 | |
249 | |
250 | // set color |
251 | |
252 | Color color = _colorTable[_colorIndex]; |
253 | double r = color.getR(); |
254 | double g = color.getG(); |
255 | double b = color.getB(); |
256 | |
257 | glColor3f(r, g, b); |
258 | } |
259 | |
260 | |
261 | |
262 | /** |
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263 | * Set current segment diameter |
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264 | * @param diameter the diameter |
265 | */ |
266 | void Model::setDiameter(double diameter) |
267 | { |
268 | _diameter = diameter; |
269 | } |
270 | |
271 | |
272 | |
273 | /** |
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274 | * Set segment diameter factor |
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275 | * @param diameter the diameter factor |
276 | */ |
277 | void Model::setDiameterFactor(double diameterFactor) |
278 | { |
279 | _diameterFactor = diameterFactor; |
280 | } |
281 | |
282 | |
283 | |
284 | /** |
285 | * Get current color index |
286 | * @return color index |
287 | */ |
288 | int Model::getColorIndex() |
289 | { |
290 | return _colorIndex; |
291 | } |
292 | |
293 | |
294 | |
295 | /** |
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296 | * Get current segment diameter |
297 | * @return the diameter |
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298 | */ |
299 | double Model::getDiameter() |
300 | { |
301 | return _diameter; |
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302 | } |
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303 | |
304 | |
305 | |
306 | /** |
307 | * Get segment diameter factor |
308 | * @return the diameter factor |
309 | */ |
310 | double Model::getDiameterFactor() |
311 | { |
312 | return _diameterFactor; |
313 | } |