1 #ifndef CAMERA_H_

2 #define CAMERA_H_

3

4 #include "vmath/vmath.h"

5

6 class Camera {

7 protected:

8 Vector3 pos;

9 float vfov; // vertical field of view in radians

10

11 mutable Matrix4x4 cached_matrix;

12 mutable bool cached_matrix_valid;

13

14 mutable Vector3 *rdir_cache;

15 mutable int rdir_cache_width, rdir_cache_height;

16

17 virtual void calc_matrix(Matrix4x4 *mat) const = 0;

18

19 Vector2 calc_sample_pos(int x, int y, int xsz, int ysz, int sample) const;

20

21 public:

22 Camera();

23 Camera(const Vector3 &pos);

24 virtual ~Camera();

25

26 virtual void set_fov(float vfov);

27 virtual float get_fov() const;

28

29 virtual void set_position(const Vector3 &pos);

30 virtual const Vector3 &get_position() const;

31 virtual const Matrix4x4 &get_matrix() const;

32

33 virtual Ray get_primary_ray(int x, int y, int xsz, int ysz, int sample = 0) const;

34 };

35

36 class TargetCamera : public Camera {

37 protected:

38 Vector3 target;

39

40 void calc_matrix(Matrix4x4 *mat) const;

41

42 public:

43 TargetCamera();

44 TargetCamera(const Vector3 &pos, const Vector3 &targ);

45

46 virtual void set_target(const Vector3 &targ);

47 virtual const Vector3 &get_target() const;

48 };

49

50 class FlyCamera : public Camera {

51 protected:

52 Quaternion rot;

53

54 void calc_matrix(Matrix4x4 *mat) const;

55

56 public:

57 void input_move(float x, float y, float z);

58 void input_rotate(float x, float y, float z);

59 };

60

61 #endif // CAMERA_H_