@spiceErrorCheck<EOL>def gffove(inst, tshape, raydir, target, tframe, abcorr, obsrvr,<EOL>tol, udstep, udrefn, rpt, udrepi, udrepu, udrepf, bail, udbail, cnfine, result=None):
assert isinstance(cnfine, stypes.SpiceCell)<EOL>assert cnfine.is_double()<EOL>if result is None:<EOL><INDENT>result = stypes.SPICEDOUBLE_CELL(<NUM_LIT>)<EOL><DEDENT>else:<EOL><INDENT>assert isinstance(result, stypes.SpiceCell)<EOL>assert result.is_double()<EOL><DEDENT>inst = stypes.stringToCharP(inst)<EOL>tshape = stypes.stringToCharP(tshape)<EOL>raydir = stypes.toDoubleVector(raydir)<EOL>target = stypes.stringToCharP(target)<EOL>tframe = stypes.stringToCharP(tframe)<EOL>abcorr = stypes.stringToCharP(abcorr)<EOL>obsrvr = stypes.stringToCharP(obsrvr)<EOL>tol = ctypes.c_double(tol)<EOL>rpt = ctypes.c_int(rpt)<EOL>bail = ctypes.c_int(bail)<EOL>libspice.gffove_c(inst, tshape, raydir, target, tframe,<EOL>abcorr, obsrvr, tol, udstep, udrefn, rpt,<EOL>udrepi, udrepu, udrepf, bail, udbail,<EOL>ctypes.byref(cnfine), ctypes.byref(result))<EOL>return result<EOL>
Determine time intervals when a specified target body or ray
intersects the space bounded by the field-of-view (FOV) of a
specified instrument. Report progress and handle interrupts if so
commanded.

http://naif.jpl.nasa.gov/pub/naif/toolkit_docs/C/cspice/gffove_c.html

:param inst: Name of the instrument
:type inst: str
:param tshape: Type of shape model used for target body
:type tshape: str
:param raydir: Ray s direction vector
:type raydir: N-Element Array of floats
:param target: Name of the target body
:type target: str
:param tframe: Body fixed body centered frame for target body
:type tframe: str
:param abcorr: Aberration correction flag
:type abcorr: str
:param obsrvr: Name of the observing body
:type obsrvr: str
:param tol: Convergence tolerance in seconds
:type tol: float
:param udstep: Name of the routine that returns a time step
:type udstep: spiceypy.utils.callbacks.UDSTEP
:param udrefn: Name of the routine that computes a refined time
:type udrefn: spiceypy.utils.callbacks.UDREFN
:param rpt:  Progress report flag
:type rpt: bool
:param udrepi: Function that initializes progress reporting.
:type udrepi: spiceypy.utils.callbacks.UDREP
:param udrepu: Function that updates the progress report
:type udrepu: spiceypy.utils.callbacks.UDREPU
:param udrepf: Function that finalizes progress reporting
:type udrepf: spiceypy.utils.callbacks.UDREPF
:param bail: Logical indicating program interrupt monitoring
:type bail: bool
:param udbail: Name of a routine that signals a program interrupt
:type udbail: spiceypy.utils.callbacks.UDBAIL
:param cnfine: SPICE window to which the search is restricted
:type cnfine: spiceypy.utils.support_types.SpiceCell
:param result: Optional SPICE window containing results
:type result: spiceypy.utils.support_types.SpiceCell