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1 /*
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2 metasurf - a library for implicit surface polygonization
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3 Copyright (C) 2011 John Tsiombikas <nuclear@member.fsf.org>
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4
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5 This program is free software: you can redistribute it and/or modify
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6 it under the terms of the GNU Lesser General Public License as published by
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7 the Free Software Foundation, either version 3 of the License, or
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8 (at your option) any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public License
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16 along with this program. If not, see <http://www.gnu.org/licenses/>.
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17 */
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18
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19 #ifndef METASURF_H_
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20 #define METASURF_H_
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21
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22 #define MSURF_GREATER 1
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23 #define MSURF_LESS 0
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24
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25 struct metasurface;
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26
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27 typedef float (*msurf_eval_func_t)(float, float, float);
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28 typedef void (*msurf_vertex_func_t)(float, float, float);
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29 typedef void (*msurf_normal_func_t)(float, float, float);
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30
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31 #ifdef __cplusplus
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32 extern "C" {
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33 #endif
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34
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35 struct metasurface *msurf_create(void);
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36 void msurf_free(struct metasurface *ms);
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37
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38 /* which is inside above or below the threshold */
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39 void msurf_inside(struct metasurface *ms, int inside);
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40
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41 /* set a scalar field evaluator function */
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42 void msurf_eval_func(struct metasurface *ms, msurf_eval_func_t func);
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43
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44 /* set a generated vertex callback function */
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45 void msurf_vertex_func(struct metasurface *ms, msurf_vertex_func_t func);
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46
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47 /* set a generated surface normal callback function (unused yet) */
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48 void msurf_normal_func(struct metasurface *ms, msurf_normal_func_t func);
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49
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50 /* set the bounding box (default: -1, -1, -1, 1, 1, 1)
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51 * keep this as tight as possible to avoid wasting grid resolution
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52 */
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53 void msurf_bounds(struct metasurface *ms, float xmin, float ymin, float zmin, float xmax, float ymax, float zmax);
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54
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55 /* resolution of the 3D evaluation grid, the bigger, the better, the slower
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56 * (default: 40, 40, 40)
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57 */
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58 void msurf_resolution(struct metasurface *ms, int xres, int yres, int zres);
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59
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60 /* isosurface threshold value (default: 0) */
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61 void msurf_threshold(struct metasurface *ms, float thres);
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62
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63
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64 /* finally call this to perform the polygonization */
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65 int msurf_polygonize(struct metasurface *ms);
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66
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67
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68 #ifdef __cplusplus
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69 }
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70 #endif
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71
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72 #endif /* METASURF_H_ */
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