1 #ifndef CAMERA_H_

2 #define CAMERA_H_

3

4 #include <gmath/gmath.h>

5

6 class Camera {

7 protected:

8 Vec3 pos;

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

10

11 mutable Mat4x4 cached_matrix;

12 mutable bool cached_matrix_valid;

13

14 virtual void calc_matrix(Mat4x4 *mat) const = 0;

15

16 Vec2 calc_sample_pos(int x, int y, int xsz, int ysz, int sample) const;

17

18 public:

19 Camera();

20 Camera(const Vec3 &pos);

21 virtual ~Camera();

22

23 virtual void set_fov(float vfov);

24 virtual float get_fov() const;

25

26 virtual void set_position(const Vec3 &pos);

27 virtual const Vec3 &get_position() const;

28 virtual const Mat4x4 &get_matrix() const;

29

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

31 };

32

33 class TargetCamera : public Camera {

34 protected:

35 Vec3 target;

36

37 void calc_matrix(Mat4x4 *mat) const;

38

39 public:

40 TargetCamera();

41 TargetCamera(const Vec3 &pos, const Vec3 &targ);

42

43 virtual void set_target(const Vec3 &targ);

44 virtual const Vec3 &get_target() const;

45 };

46

47 class FlyCamera : public Camera {

48 protected:

49 Quat rot;

50

51 void calc_matrix(Mat4x4 *mat) const;

52

53 public:

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

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

56 };

57

58 #endif // CAMERA_H_