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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 struct metasurface;
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23
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24 typedef float (*msurf_eval_func_t)(float, float, float);
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25 typedef void (*msurf_vertex_func_t)(float, float, float);
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26 typedef void (*msurf_normal_func_t)(float, float, float);
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27
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28 #ifdef __cplusplus
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29 extern "C" {
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30 #endif
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31
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32 struct metasurface *msurf_create(void);
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33 void msurf_free(struct metasurface *ms);
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34
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35 /* set a scalar field evaluator function */
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36 void msurf_eval_func(struct metasurface *ms, msurf_eval_func_t func);
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37
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38 /* set a generated vertex callback function */
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39 void msurf_vertex_func(struct metasurface *ms, msurf_vertex_func_t func);
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40
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41 /* set a generated surface normal callback function (unused yet) */
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42 void msurf_normal_func(struct metasurface *ms, msurf_normal_func_t func);
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43
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44 /* set the bounding box (default: -1, -1, -1, 1, 1, 1)
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45 * keep this as tight as possible to avoid wasting grid resolution
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46 */
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47 void msurf_bounds(struct metasurface *ms, float xmin, float ymin, float zmin, float xmax, float ymax, float zmax);
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48
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49 /* resolution of the 3D evaluation grid, the bigger, the better, the slower
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50 * (default: 40, 40, 40)
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51 */
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52 void msurf_resolution(struct metasurface *ms, int xres, int yres, int zres);
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53
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54 /* isosurface threshold value (default: 0) */
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55 void msurf_threshold(struct metasurface *ms, float thres);
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56
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57
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58 /* finally call this to perform the polygonization */
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59 int msurf_polygonize(struct metasurface *ms);
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60
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61
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62 #ifdef __cplusplus
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63 }
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64 #endif
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65
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66 #endif /* METASURF_H_ */
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