1 /*

2 libvmath - a vector math library

3 Copyright (C) 2004-2011 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

19 #ifndef GEOM_H_

20 #define GEOM_H_

21

22 #include "vector.h"

23 #include "ray.h"

24

25 typedef struct {

26 vec3_t norm;

27 scalar_t d;

28 } plane_t;

29

30 typedef struct {

31 vec3_t pos;

32 scalar_t rad;

33 } sphere_t;

34

35 typedef struct {

36 vec3_t min, max;

37 } aabox_t;

38

39 #ifdef __cplusplus

40 extern "C" {

41 #endif

42

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

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

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

46 plane_t plane_ptnorm(vec3_t pt, vec3_t normal);

47

48 plane_t plane_invert(plane_t p);

49

50 scalar_t plane_signed_dist(plane_t plane, vec3_t pt);

51 scalar_t plane_dist(plane_t plane, vec3_t pt);

52 vec3_t plane_point(plane_t plane);

53

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

55

56 /* spheres always come in handy */

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

58

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

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

61

62 #ifdef __cplusplus

63 }

64

65 /* TODO

66 class Plane : public plane_t {

67 public:

68 };

69 */

70

71 #endif

72

73 #endif /* GEOM_H_ */