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1 /*
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2 libvmath - a vector math library
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3 Copyright (C) 2004-2012 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
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7 by 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 #ifndef LIBVMATH_GEOM_H_
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19 #define LIBVMATH_GEOM_H_
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20
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21 #include "vector.h"
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22 #include "ray.h"
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23
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24 typedef struct {
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25 vec3_t norm;
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26 scalar_t d;
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27 } plane_t;
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28
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29 typedef struct {
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30 vec3_t pos;
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31 scalar_t rad;
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32 } sphere_t;
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33
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34 typedef struct {
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35 vec3_t min, max;
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36 } aabox_t;
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37
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38 #ifdef __cplusplus
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39 extern "C" {
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40 #endif
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41
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42 /* planes are good... you need planes, yes you do */
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43 plane_t plane_cons(scalar_t nx, scalar_t ny, scalar_t nz, scalar_t d);
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44 plane_t plane_poly(vec3_t v0, vec3_t v1, vec3_t v2);
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45 plane_t plane_ptnorm(vec3_t pt, vec3_t normal);
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46
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47 plane_t plane_invert(plane_t p);
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48
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49 scalar_t plane_signed_dist(plane_t plane, vec3_t pt);
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50 scalar_t plane_dist(plane_t plane, vec3_t pt);
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51 vec3_t plane_point(plane_t plane);
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52
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53 int plane_ray_intersect(ray_t ray, plane_t plane, scalar_t *pos);
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54
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55 /* spheres always come in handy */
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56 sphere_t sphere_cons(scalar_t x, scalar_t y, scalar_t z, scalar_t rad);
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57
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58 int sphere_ray_intersect(ray_t ray, sphere_t sph, scalar_t *pos);
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59 int sphere_sphere_intersect(sphere_t sph1, sphere_t sph2, scalar_t *pos, scalar_t *rad);
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60
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61 #ifdef __cplusplus
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62 }
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63
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64 /* TODO
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65 class Plane : public plane_t {
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66 public:
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67 };
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68 */
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69
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70 #endif
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71
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72 #endif /* LIBVMATH_GEOM_H_ */
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