1 /*

2 libvmath - a vector math library

3 Copyright (C) 2004-2012 John Tsiombikas <nuclear@member.fsf.org>

4

5 This program is free software: you can redistribute it and/or modify

6 it under the terms of the GNU Lesser General Public License as published

7 by the Free Software Foundation, either version 3 of the License, or

8 (at your option) any later version.

9

10 This program is distributed in the hope that it will be useful,

11 but WITHOUT ANY WARRANTY; without even the implied warranty of

12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

13 GNU Lesser General Public License for more details.

14

15 You should have received a copy of the GNU Lesser General Public License

16 along with this program. If not, see <http://www.gnu.org/licenses/>.

17 */

18 #ifndef LIBVMATH_GEOM_H_

19 #define LIBVMATH_GEOM_H_

20

21 #include "vector.h"

22 #include "ray.h"

23

24 typedef struct {

25 vec3_t norm;

26 scalar_t d;

27 } plane_t;

28

29 typedef struct {

30 vec3_t pos;

31 scalar_t rad;

32 } sphere_t;

33

34 typedef struct {

35 vec3_t min, max;

36 } aabox_t;

37

38 #ifdef __cplusplus

39 extern "C" {

40 #endif

41

42 /* planes are good... you need planes, yes you do */

43 plane_t plane_cons(scalar_t nx, scalar_t ny, scalar_t nz, scalar_t d);

44 plane_t plane_poly(vec3_t v0, vec3_t v1, vec3_t v2);

45 plane_t plane_ptnorm(vec3_t pt, vec3_t normal);

46

47 plane_t plane_invert(plane_t p);

48

49 scalar_t plane_signed_dist(plane_t plane, vec3_t pt);

50 scalar_t plane_dist(plane_t plane, vec3_t pt);

51 vec3_t plane_point(plane_t plane);

52

53 int plane_ray_intersect(ray_t ray, plane_t plane, scalar_t *pos);

54

55 /* spheres always come in handy */

56 sphere_t sphere_cons(scalar_t x, scalar_t y, scalar_t z, scalar_t rad);

57

58 int sphere_ray_intersect(ray_t ray, sphere_t sph, scalar_t *pos);

59 int sphere_sphere_intersect(sphere_t sph1, sphere_t sph2, scalar_t *pos, scalar_t *rad);

60

61 #ifdef __cplusplus

62 }

63

64 /* TODO

65 class Plane : public plane_t {

66 public:

67 };

68 */

69

70 #endif

71

72 #endif /* LIBVMATH_GEOM_H_ */