Developer Documentation
stipple_alpha.cc
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41 
42 
43 
44 
45 //=============================================================================
46 //
47 // Stipple Polygon Transparency - IMPLEMENTATION
48 //
49 //=============================================================================
50 
51 //== INCLUDES =================================================================
52 
53 
54 #include "stipple_alpha.hh"
55 #include "gl.hh"
56 #include <GL/GLState.hh>
57 
58 
59 //== NAMESPACES ===============================================================
60 namespace ACG {
61 //== IMPLEMENTATION ==========================================================
62 
63 
64 const GLubyte stippleMask[17][128] =
65 {
66  /* NOTE: 0% opaqueness is faster to set and probably faster to render with:
67  ACG::GLState::disable(GL_POLYGON_STIPPLE);
68  glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE); */
69  {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
70  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
71  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
72  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
73  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
74  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
75  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
76  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
77  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
78  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
79  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
80  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
81  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
82  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
83  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
84  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
85 
86  {0x88, 0x88, 0x88, 0x88, 0x00, 0x00, 0x00, 0x00,
87  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
88  0x88, 0x88, 0x88, 0x88, 0x00, 0x00, 0x00, 0x00,
89  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
90  0x88, 0x88, 0x88, 0x88, 0x00, 0x00, 0x00, 0x00,
91  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
92  0x88, 0x88, 0x88, 0x88, 0x00, 0x00, 0x00, 0x00,
93  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
94  0x88, 0x88, 0x88, 0x88, 0x00, 0x00, 0x00, 0x00,
95  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
96  0x88, 0x88, 0x88, 0x88, 0x00, 0x00, 0x00, 0x00,
97  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
98  0x88, 0x88, 0x88, 0x88, 0x00, 0x00, 0x00, 0x00,
99  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
100  0x88, 0x88, 0x88, 0x88, 0x00, 0x00, 0x00, 0x00,
101  0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00},
102 
103  {0x88, 0x88, 0x88, 0x88, 0x00, 0x00, 0x00, 0x00,
104  0x22, 0x22, 0x22, 0x22, 0x00, 0x00, 0x00, 0x00,
105  0x88, 0x88, 0x88, 0x88, 0x00, 0x00, 0x00, 0x00,
106  0x22, 0x22, 0x22, 0x22, 0x00, 0x00, 0x00, 0x00,
107  0x88, 0x88, 0x88, 0x88, 0x00, 0x00, 0x00, 0x00,
108  0x22, 0x22, 0x22, 0x22, 0x00, 0x00, 0x00, 0x00,
109  0x88, 0x88, 0x88, 0x88, 0x00, 0x00, 0x00, 0x00,
110  0x22, 0x22, 0x22, 0x22, 0x00, 0x00, 0x00, 0x00,
111  0x88, 0x88, 0x88, 0x88, 0x00, 0x00, 0x00, 0x00,
112  0x22, 0x22, 0x22, 0x22, 0x00, 0x00, 0x00, 0x00,
113  0x88, 0x88, 0x88, 0x88, 0x00, 0x00, 0x00, 0x00,
114  0x22, 0x22, 0x22, 0x22, 0x00, 0x00, 0x00, 0x00,
115  0x88, 0x88, 0x88, 0x88, 0x00, 0x00, 0x00, 0x00,
116  0x22, 0x22, 0x22, 0x22, 0x00, 0x00, 0x00, 0x00,
117  0x88, 0x88, 0x88, 0x88, 0x00, 0x00, 0x00, 0x00,
118  0x22, 0x22, 0x22, 0x22, 0x00, 0x00, 0x00, 0x00},
119 
120  {0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
121  0x22, 0x22, 0x22, 0x22, 0x00, 0x00, 0x00, 0x00,
122  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
123  0x22, 0x22, 0x22, 0x22, 0x00, 0x00, 0x00, 0x00,
124  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
125  0x22, 0x22, 0x22, 0x22, 0x00, 0x00, 0x00, 0x00,
126  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
127  0x22, 0x22, 0x22, 0x22, 0x00, 0x00, 0x00, 0x00,
128  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
129  0x22, 0x22, 0x22, 0x22, 0x00, 0x00, 0x00, 0x00,
130  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
131  0x22, 0x22, 0x22, 0x22, 0x00, 0x00, 0x00, 0x00,
132  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
133  0x22, 0x22, 0x22, 0x22, 0x00, 0x00, 0x00, 0x00,
134  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
135  0x22, 0x22, 0x22, 0x22, 0x00, 0x00, 0x00, 0x00},
136 
137  {0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
138  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
139  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
140  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
141  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
142  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
143  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
144  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
145  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
146  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
147  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
148  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
149  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
150  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
151  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
152  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00},
153 
154  {0xaa, 0xaa, 0xaa, 0xaa, 0x44, 0x44, 0x44, 0x44,
155  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
156  0xaa, 0xaa, 0xaa, 0xaa, 0x44, 0x44, 0x44, 0x44,
157  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
158  0xaa, 0xaa, 0xaa, 0xaa, 0x44, 0x44, 0x44, 0x44,
159  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
160  0xaa, 0xaa, 0xaa, 0xaa, 0x44, 0x44, 0x44, 0x44,
161  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
162  0xaa, 0xaa, 0xaa, 0xaa, 0x44, 0x44, 0x44, 0x44,
163  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
164  0xaa, 0xaa, 0xaa, 0xaa, 0x44, 0x44, 0x44, 0x44,
165  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
166  0xaa, 0xaa, 0xaa, 0xaa, 0x44, 0x44, 0x44, 0x44,
167  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00,
168  0xaa, 0xaa, 0xaa, 0xaa, 0x44, 0x44, 0x44, 0x44,
169  0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00},
170 
171  {0xaa, 0xaa, 0xaa, 0xaa, 0x44, 0x44, 0x44, 0x44,
172  0xaa, 0xaa, 0xaa, 0xaa, 0x11, 0x11, 0x11, 0x11,
173  0xaa, 0xaa, 0xaa, 0xaa, 0x44, 0x44, 0x44, 0x44,
174  0xaa, 0xaa, 0xaa, 0xaa, 0x11, 0x11, 0x11, 0x11,
175  0xaa, 0xaa, 0xaa, 0xaa, 0x44, 0x44, 0x44, 0x44,
176  0xaa, 0xaa, 0xaa, 0xaa, 0x11, 0x11, 0x11, 0x11,
177  0xaa, 0xaa, 0xaa, 0xaa, 0x44, 0x44, 0x44, 0x44,
178  0xaa, 0xaa, 0xaa, 0xaa, 0x11, 0x11, 0x11, 0x11,
179  0xaa, 0xaa, 0xaa, 0xaa, 0x44, 0x44, 0x44, 0x44,
180  0xaa, 0xaa, 0xaa, 0xaa, 0x11, 0x11, 0x11, 0x11,
181  0xaa, 0xaa, 0xaa, 0xaa, 0x44, 0x44, 0x44, 0x44,
182  0xaa, 0xaa, 0xaa, 0xaa, 0x11, 0x11, 0x11, 0x11,
183  0xaa, 0xaa, 0xaa, 0xaa, 0x44, 0x44, 0x44, 0x44,
184  0xaa, 0xaa, 0xaa, 0xaa, 0x11, 0x11, 0x11, 0x11,
185  0xaa, 0xaa, 0xaa, 0xaa, 0x44, 0x44, 0x44, 0x44,
186  0xaa, 0xaa, 0xaa, 0xaa, 0x11, 0x11, 0x11, 0x11},
187 
188  {0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
189  0xaa, 0xaa, 0xaa, 0xaa, 0x11, 0x11, 0x11, 0x11,
190  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
191  0xaa, 0xaa, 0xaa, 0xaa, 0x11, 0x11, 0x11, 0x11,
192  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
193  0xaa, 0xaa, 0xaa, 0xaa, 0x11, 0x11, 0x11, 0x11,
194  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
195  0xaa, 0xaa, 0xaa, 0xaa, 0x11, 0x11, 0x11, 0x11,
196  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
197  0xaa, 0xaa, 0xaa, 0xaa, 0x11, 0x11, 0x11, 0x11,
198  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
199  0xaa, 0xaa, 0xaa, 0xaa, 0x11, 0x11, 0x11, 0x11,
200  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
201  0xaa, 0xaa, 0xaa, 0xaa, 0x11, 0x11, 0x11, 0x11,
202  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
203  0xaa, 0xaa, 0xaa, 0xaa, 0x11, 0x11, 0x11, 0x11},
204 
205  {0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
206  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
207  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
208  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
209  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
210  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
211  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
212  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
213  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
214  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
215  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
216  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
217  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
218  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
219  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
220  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55},
221 
222  {0xee, 0xee, 0xee, 0xee, 0x55, 0x55, 0x55, 0x55,
223  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
224  0xee, 0xee, 0xee, 0xee, 0x55, 0x55, 0x55, 0x55,
225  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
226  0xee, 0xee, 0xee, 0xee, 0x55, 0x55, 0x55, 0x55,
227  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
228  0xee, 0xee, 0xee, 0xee, 0x55, 0x55, 0x55, 0x55,
229  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
230  0xee, 0xee, 0xee, 0xee, 0x55, 0x55, 0x55, 0x55,
231  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
232  0xee, 0xee, 0xee, 0xee, 0x55, 0x55, 0x55, 0x55,
233  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
234  0xee, 0xee, 0xee, 0xee, 0x55, 0x55, 0x55, 0x55,
235  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55,
236  0xee, 0xee, 0xee, 0xee, 0x55, 0x55, 0x55, 0x55,
237  0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55},
238 
239  {0xee, 0xee, 0xee, 0xee, 0x55, 0x55, 0x55, 0x55,
240  0xbb, 0xbb, 0xbb, 0xbb, 0x55, 0x55, 0x55, 0x55,
241  0xee, 0xee, 0xee, 0xee, 0x55, 0x55, 0x55, 0x55,
242  0xbb, 0xbb, 0xbb, 0xbb, 0x55, 0x55, 0x55, 0x55,
243  0xee, 0xee, 0xee, 0xee, 0x55, 0x55, 0x55, 0x55,
244  0xbb, 0xbb, 0xbb, 0xbb, 0x55, 0x55, 0x55, 0x55,
245  0xee, 0xee, 0xee, 0xee, 0x55, 0x55, 0x55, 0x55,
246  0xbb, 0xbb, 0xbb, 0xbb, 0x55, 0x55, 0x55, 0x55,
247  0xee, 0xee, 0xee, 0xee, 0x55, 0x55, 0x55, 0x55,
248  0xbb, 0xbb, 0xbb, 0xbb, 0x55, 0x55, 0x55, 0x55,
249  0xee, 0xee, 0xee, 0xee, 0x55, 0x55, 0x55, 0x55,
250  0xbb, 0xbb, 0xbb, 0xbb, 0x55, 0x55, 0x55, 0x55,
251  0xee, 0xee, 0xee, 0xee, 0x55, 0x55, 0x55, 0x55,
252  0xbb, 0xbb, 0xbb, 0xbb, 0x55, 0x55, 0x55, 0x55,
253  0xee, 0xee, 0xee, 0xee, 0x55, 0x55, 0x55, 0x55,
254  0xbb, 0xbb, 0xbb, 0xbb, 0x55, 0x55, 0x55, 0x55},
255 
256  {0xff, 0xff, 0xff, 0xff, 0x55, 0x55, 0x55, 0x55,
257  0xbb, 0xbb, 0xbb, 0xbb, 0x55, 0x55, 0x55, 0x55,
258  0xff, 0xff, 0xff, 0xff, 0x55, 0x55, 0x55, 0x55,
259  0xbb, 0xbb, 0xbb, 0xbb, 0x55, 0x55, 0x55, 0x55,
260  0xff, 0xff, 0xff, 0xff, 0x55, 0x55, 0x55, 0x55,
261  0xbb, 0xbb, 0xbb, 0xbb, 0x55, 0x55, 0x55, 0x55,
262  0xff, 0xff, 0xff, 0xff, 0x55, 0x55, 0x55, 0x55,
263  0xbb, 0xbb, 0xbb, 0xbb, 0x55, 0x55, 0x55, 0x55,
264  0xff, 0xff, 0xff, 0xff, 0x55, 0x55, 0x55, 0x55,
265  0xbb, 0xbb, 0xbb, 0xbb, 0x55, 0x55, 0x55, 0x55,
266  0xff, 0xff, 0xff, 0xff, 0x55, 0x55, 0x55, 0x55,
267  0xbb, 0xbb, 0xbb, 0xbb, 0x55, 0x55, 0x55, 0x55,
268  0xff, 0xff, 0xff, 0xff, 0x55, 0x55, 0x55, 0x55,
269  0xbb, 0xbb, 0xbb, 0xbb, 0x55, 0x55, 0x55, 0x55,
270  0xff, 0xff, 0xff, 0xff, 0x55, 0x55, 0x55, 0x55,
271  0xbb, 0xbb, 0xbb, 0xbb, 0x55, 0x55, 0x55, 0x55},
272 
273  {0xff, 0xff, 0xff, 0xff, 0x55, 0x55, 0x55, 0x55,
274  0xff, 0xff, 0xff, 0xff, 0x55, 0x55, 0x55, 0x55,
275  0xff, 0xff, 0xff, 0xff, 0x55, 0x55, 0x55, 0x55,
276  0xff, 0xff, 0xff, 0xff, 0x55, 0x55, 0x55, 0x55,
277  0xff, 0xff, 0xff, 0xff, 0x55, 0x55, 0x55, 0x55,
278  0xff, 0xff, 0xff, 0xff, 0x55, 0x55, 0x55, 0x55,
279  0xff, 0xff, 0xff, 0xff, 0x55, 0x55, 0x55, 0x55,
280  0xff, 0xff, 0xff, 0xff, 0x55, 0x55, 0x55, 0x55,
281  0xff, 0xff, 0xff, 0xff, 0x55, 0x55, 0x55, 0x55,
282  0xff, 0xff, 0xff, 0xff, 0x55, 0x55, 0x55, 0x55,
283  0xff, 0xff, 0xff, 0xff, 0x55, 0x55, 0x55, 0x55,
284  0xff, 0xff, 0xff, 0xff, 0x55, 0x55, 0x55, 0x55,
285  0xff, 0xff, 0xff, 0xff, 0x55, 0x55, 0x55, 0x55,
286  0xff, 0xff, 0xff, 0xff, 0x55, 0x55, 0x55, 0x55,
287  0xff, 0xff, 0xff, 0xff, 0x55, 0x55, 0x55, 0x55,
288  0xff, 0xff, 0xff, 0xff, 0x55, 0x55, 0x55, 0x55},
289 
290  {0xff, 0xff, 0xff, 0xff, 0xdd, 0xdd, 0xdd, 0xdd,
291  0xff, 0xff, 0xff, 0xff, 0x55, 0x55, 0x55, 0x55,
292  0xff, 0xff, 0xff, 0xff, 0xdd, 0xdd, 0xdd, 0xdd,
293  0xff, 0xff, 0xff, 0xff, 0x55, 0x55, 0x55, 0x55,
294  0xff, 0xff, 0xff, 0xff, 0xdd, 0xdd, 0xdd, 0xdd,
295  0xff, 0xff, 0xff, 0xff, 0x55, 0x55, 0x55, 0x55,
296  0xff, 0xff, 0xff, 0xff, 0xdd, 0xdd, 0xdd, 0xdd,
297  0xff, 0xff, 0xff, 0xff, 0x55, 0x55, 0x55, 0x55,
298  0xff, 0xff, 0xff, 0xff, 0xdd, 0xdd, 0xdd, 0xdd,
299  0xff, 0xff, 0xff, 0xff, 0x55, 0x55, 0x55, 0x55,
300  0xff, 0xff, 0xff, 0xff, 0xdd, 0xdd, 0xdd, 0xdd,
301  0xff, 0xff, 0xff, 0xff, 0x55, 0x55, 0x55, 0x55,
302  0xff, 0xff, 0xff, 0xff, 0xdd, 0xdd, 0xdd, 0xdd,
303  0xff, 0xff, 0xff, 0xff, 0x55, 0x55, 0x55, 0x55,
304  0xff, 0xff, 0xff, 0xff, 0xdd, 0xdd, 0xdd, 0xdd,
305  0xff, 0xff, 0xff, 0xff, 0x55, 0x55, 0x55, 0x55},
306 
307  {0xff, 0xff, 0xff, 0xff, 0xdd, 0xdd, 0xdd, 0xdd,
308  0xff, 0xff, 0xff, 0xff, 0x77, 0x77, 0x77, 0x77,
309  0xff, 0xff, 0xff, 0xff, 0xdd, 0xdd, 0xdd, 0xdd,
310  0xff, 0xff, 0xff, 0xff, 0x77, 0x77, 0x77, 0x77,
311  0xff, 0xff, 0xff, 0xff, 0xdd, 0xdd, 0xdd, 0xdd,
312  0xff, 0xff, 0xff, 0xff, 0x77, 0x77, 0x77, 0x77,
313  0xff, 0xff, 0xff, 0xff, 0xdd, 0xdd, 0xdd, 0xdd,
314  0xff, 0xff, 0xff, 0xff, 0x77, 0x77, 0x77, 0x77,
315  0xff, 0xff, 0xff, 0xff, 0xdd, 0xdd, 0xdd, 0xdd,
316  0xff, 0xff, 0xff, 0xff, 0x77, 0x77, 0x77, 0x77,
317  0xff, 0xff, 0xff, 0xff, 0xdd, 0xdd, 0xdd, 0xdd,
318  0xff, 0xff, 0xff, 0xff, 0x77, 0x77, 0x77, 0x77,
319  0xff, 0xff, 0xff, 0xff, 0xdd, 0xdd, 0xdd, 0xdd,
320  0xff, 0xff, 0xff, 0xff, 0x77, 0x77, 0x77, 0x77,
321  0xff, 0xff, 0xff, 0xff, 0xdd, 0xdd, 0xdd, 0xdd,
322  0xff, 0xff, 0xff, 0xff, 0x77, 0x77, 0x77, 0x77},
323 
324  {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
325  0xff, 0xff, 0xff, 0xff, 0x77, 0x77, 0x77, 0x77,
326  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
327  0xff, 0xff, 0xff, 0xff, 0x77, 0x77, 0x77, 0x77,
328  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
329  0xff, 0xff, 0xff, 0xff, 0x77, 0x77, 0x77, 0x77,
330  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
331  0xff, 0xff, 0xff, 0xff, 0x77, 0x77, 0x77, 0x77,
332  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
333  0xff, 0xff, 0xff, 0xff, 0x77, 0x77, 0x77, 0x77,
334  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
335  0xff, 0xff, 0xff, 0xff, 0x77, 0x77, 0x77, 0x77,
336  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
337  0xff, 0xff, 0xff, 0xff, 0x77, 0x77, 0x77, 0x77,
338  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
339  0xff, 0xff, 0xff, 0xff, 0x77, 0x77, 0x77, 0x77},
340 
341  /* NOTE: 100% opaqueness is faster to set and probably faster to render with:
342  ACG::GLState::disable(GL_POLYGON_STIPPLE); */
343  {0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
344  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
345  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
346  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
347  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
348  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
349  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
350  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
351  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
352  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
353  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
354  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
355  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
356  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
357  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
358  0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff},
359 };
360 
361 
362 //-----------------------------------------------------------------------------
363 
364 
365 void stipple_alpha(float _alpha)
366 {
367  // transparent
368  if (_alpha < 1.0)
369  {
370  if (_alpha < 0.0) _alpha = 0.0;
371 
372  ACG::GLState::enable(GL_POLYGON_STIPPLE);
373  glPolygonStipple(stippleMask[ (unsigned int)(_alpha * 16.0 + 0.5)]);
374  }
375 
376  // opaque
377  else
378  {
379  ACG::GLState::disable(GL_POLYGON_STIPPLE);
380  }
381 }
382 
383 
384 //=============================================================================
385 } // namespace ACG
386 //=============================================================================
ACG::GLState::enable
static void enable(GLenum _cap, bool _warnRemoved=true)
replaces glEnable, but supports locking
Definition: GLState.cc:1507
ACG
Namespace providing different geometric functions concerning angles.
Definition: BaseObjectData.hh:68
ACG::GLState::disable
static void disable(GLenum _cap, bool _warnRemoved=true)
replaces glDisable, but supports locking
Definition: GLState.cc:1527