1 #ifndef GOATVR_H_

2 #define GOATVR_H_

3

4 enum {

5 GVR_EYE_CENTER,

6 GVR_EYE_LEFT,

7 GVR_EYE_RIGHT

8 };

9

10 int gvr_init(void);

11 void gvr_shutdown(void);

12

13 /* ---- VR backend module management ---- */

14 int gvr_module_count(void);

15 char *gvr_module_name(int idx);

16 int gvr_module_available(int idx);

17

18 int gvr_active_module(void);

19 int gvr_use_module(int idx);

20

21 /* Enter VR rendering mode. GoatVR will assume control of your output, go fullscreen,

22 * reposition your window to show up on the VR device, or whatever is needed depending

23 * on the selected vr module.

24 */

25 int gvr_enter_vr(void);

26 /* Leave VR rendering mode and return to the previous rendering state */

27 int gvr_leave_vr(void);

28

29 /* ---- rendering ---- */

30 void gvr_begin(int eye);

31 void gvr_end(void);

32 void gvr_present(void);

33

34 /* expose internal render target objects, usually not needed */

35 void gvr_get_viewport(int *vp);

36 unsigned int gvr_get_fbo(void);

37 unsigned int gvr_get_fbo_texture(void);

38 unsigned int gvr_get_fbo_depth(void);

39

40 /* ---- tracking ---- */

41 int gvr_position(float *vec, int track_id);

42 int gvr_rotation(float *quat, int track_id);

43 int gvr_matrix(float *mat, int track_id);

44

45 int gvr_view_matrix(float *mat, int eye); /* equivalent to inverse of gvr_matrix(mat, eye) */

46 int gvr_proj_matrix(float *mat, int eye, float znear, float zfar);

47

48 /* ---- options and parameters ---- */

49

50 /* set fov in degrees, for backends which do not dictate an fov (mostly for fallback) */

51 void gvr_set_fov(float fov);

52 float gvr_get_fov(void); /* might be approximate fov */

53

54 void gvr_set_eye_height(void); /* override eye height */

55 float gvr_get_eye_height(void);

56 void gvr_set_ipd(void); /* override ipd */

57 float gvr_get_ipd(void);

58

59 #endif /* GOATVR_H_ */