annotate README @ 6:c1a60ab45bf7
added commandline option in volume example to set the iso threshold
| author |
John Tsiombikas <nuclear@member.fsf.org> |
| date |
Wed, 26 Oct 2011 23:38:20 +0300 |
| parents |
dc0e882ec3f9 |
| children |
1fd80c90d566 |
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line source |
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nuclear@1
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1 metasurf - a library for implicit surface polygonization
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2
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3 1. Overview
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4 -----------
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5
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6 Metasurf is a library for implict surface polygonization. You only need to
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7 set a callback that returns the scalar field value at any given point in
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8 3-space, and another callback to accept isosurface vertices. Then at any point
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9 just call msurf_polygonize, and the library handles everything else for you.
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10
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11 2. Usage
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12 --------
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13 The following snippet is sufficient to draw the surface of an implicit unit
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14 sphere, centered around the origin.
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15
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16 struct metasurface *ms;
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17
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18 /* initialization */
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19 ms = msurf_create();
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20 msurf_eval_func(ms, eval);
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21 msurf_vertex_func(ms, glVertex3f);
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22
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23 /* drawing */
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24 glBegin(GL_TRIANGLES);
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25 msurf_polygonize(ms);
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26 glEnd();
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27
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28 /* evaluator */
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29 float eval(float x, float y, float z)
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30 {
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31 return (x * x + y * y + z * z) - 1.0;
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32 }
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33
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34 See the examples subdirectory for more examples.
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35
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36 3. License
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37 ----------
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38 Copyright: John Tsiombikas <nuclear@member.fsf.org>
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39
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40 Metasurf is free software, you may use, modify, and redistribute it freely under
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41 the terms of the GNU Lesser General Public License (LGPL) v3 (or at your option,
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42 any later version published by the Free Software Foundation). See COPYING and
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43 COPYING.LESSER for more details.
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44
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45
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46 4. Contributions
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47 ----------------
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48 If you'd like to fix the marching tetrahedra implementation or have any other
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49 ideas for improving this library drop me an email at: nuclear@member.fsf.org.
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50 Also feel free to submit patches for bugfixes.
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