Function getfov_c 

pub unsafe extern "C" fn getfov_c(
    instid: i32,
    room: i32,
    shapelen: i32,
    framelen: i32,
    shape: *mut u8,
    frame: *mut u8,
    bsight: *mut f64,
    n: *mut i32,
    bounds: *mut [f64; 3],
)