Function realsense_sys::rs2_get_frame_points_count

pub unsafe extern "C" fn rs2_get_frame_points_count(
    frame: *const rs2_frame, 
    error: *mut *mut rs2_error
) -> c_int

When called on Points frame type, this method returns the number of vertices in the frame \param[in] frame Points frame \param[out] error If non-null, receives any error that occurs during this call, otherwise, errors are ignored \return Number of vertices