// get current camera and projector position
void get_camera(float *x, float *y, float *z, int64_t position);
void get_projector(float *x, float *y, float *z, int64_t position);
// get current camera and projector position
void get_camera(float *x, float *y, float *z, int64_t position);
void get_projector(float *x, float *y, float *z, int64_t position);