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1 #ifndef VR_H_
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2 #define VR_H_
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3
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4 /* unit: pixels */
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5 #define VR_DISPLAY_WIDTH "display-xres"
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6 #define VR_DISPLAY_HEIGHT "display-yres"
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7 #define VR_LEYE_XRES "left-eye-xres"
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8 #define VR_LEYE_YRES "left-eye-yres"
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9 #define VR_REYE_XRES "right-eye-xres"
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10 #define VR_REYE_YRES "right-eye-yres"
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11 #define VR_WIN_XOFFS "win-xoffset"
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12 #define VR_WIN_YOFFS "win-yoffset"
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13 #define VR_EYE_RES_SCALE "eye-res-scale" /* default 1 */
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14 /* unit: meters */
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15 #define VR_EYE_HEIGHT "eye-height"
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16 #define VR_IPD "ipd"
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17
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18 enum {
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19 VR_EYE_LEFT,
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20 VR_EYE_RIGHT
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21 };
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22
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23 #ifdef __cplusplus
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24 extern "C" {
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25 #endif
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26
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27 int vr_init(void);
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28 void vr_shutdown(void);
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29
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30 int vr_module_count(void);
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31 const char *vr_module_name(int idx);
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32
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33 int vr_use_module(int idx);
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34 int vr_use_module_named(const char *name);
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35
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36 void vr_seti(const char *optname, int val);
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37 void vr_setf(const char *optname, float val);
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38 int vr_geti(const char *optname);
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39 float vr_getf(const char *optname);
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40 /* variants of the get functions, with an additional "default value"
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41 * argument, which is returned if the requested option is missing
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42 */
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43 int vr_geti_def(const char *optname, int def_val);
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44 float vr_getf_def(const char *optname, float def_val);
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45
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46 int vr_view_translation(int eye, float *vec);
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47 int vr_view_rotation(int eye, float *quat);
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48
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49 /* returns non-zero if the active vr module provides this kind of matrix
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50 * information, otherwise it returns zero, and sets mat to identity
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51 */
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52 int vr_view_matrix(int eye, float *mat);
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53 int vr_proj_matrix(int eye, float znear, float zfar, float *mat);
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54
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55 void vr_begin(int eye);
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56 void vr_end(void);
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57 int vr_swap_buffers(void);
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58
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59 /* set the output texture or separate textures for each eye */
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60 void vr_output_texture(unsigned int tex, float umin, float vmin, float umax, float vmax);
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61 void vr_output_texture_eye(int eye, unsigned int tex, float umin, float vmin, float umax, float vmax);
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62
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63 void vr_recenter(void);
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64
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65 #ifdef __cplusplus
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66 }
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67 #endif
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68
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69 #endif /* VR_H_ */
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