1 #ifndef GEOMOBJ_H_

2 #define GEOMOBJ_H_

3

4 #include <gmath/gmath.h>

5

6 class GeomObject;

7 class SceneNode;

8

9 struct HitPoint {

10 float dist; //< parametric distance along the ray

11 Vec3 pos; //< position of intersection (orig + dir * dist)

12 Vec3 normal; //< normal at the point of intersection

13 const void *obj; //< pointer to the intersected object

14 const SceneNode *node;

15 Ray ray;

16 };

17

18 class GeomObject {

19 public:

20 virtual ~GeomObject();

21

22 virtual void set_union(const GeomObject *obj1, const GeomObject *obj2) = 0;

23 virtual void set_intersection(const GeomObject *obj1, const GeomObject *obj2) = 0;

24

25 virtual bool intersect(const Ray &ray, HitPoint *hit = 0) const = 0;

26 };

27

28 class Sphere : public GeomObject {

29 public:

30 Vec3 center;

31 float radius;

32

33 Sphere();

34 Sphere(const Vec3 &center, float radius);

35

36 void set_union(const GeomObject *obj1, const GeomObject *obj2);

37 void set_intersection(const GeomObject *obj1, const GeomObject *obj2);

38

39 bool intersect(const Ray &ray, HitPoint *hit = 0) const;

40 };

41

42 class AABox : public GeomObject {

43 public:

44 Vec3 min, max;

45

46 AABox();

47 AABox(const Vec3 &min, const Vec3 &max);

48

49 void set_union(const GeomObject *obj1, const GeomObject *obj2);

50 void set_intersection(const GeomObject *obj1, const GeomObject *obj2);

51

52 bool intersect(const Ray &ray, HitPoint *hit = 0) const;

53 };

54

55 class Plane : public GeomObject {

56 public:

57 Vec3 pt, normal;

58

59 Plane();

60 Plane(const Vec3 &pt, const Vec3 &normal);

61 Plane(const Vec3 &p1, const Vec3 &p2, const Vec3 &p3);

62 Plane(const Vec3 &normal, float dist);

63

64 void set_union(const GeomObject *obj1, const GeomObject *obj2);

65 void set_intersection(const GeomObject *obj1, const GeomObject *obj2);

66

67 bool intersect(const Ray &ray, HitPoint *hit = 0) const;

68 };

69

70 float sphere_distance(const Vec3 &cent, float rad, const Vec3 &pt);

71 float capsule_distance(const Vec3 &a, float ra, const Vec3 &b, float rb, const Vec3 &pt);

72

73 #endif // GEOMOBJ_H_