I wrote: > OK, time for more stuff, mostly Nasal or Nasal related. Curt gave me > write access to the CVS repository so I've checked it in myself. > Shout if I broke something.
I broke something! :)
My commit died in the base package Nasal directory with the following error:
cvs [commit aborted]: could not open lock file `/var/cvs/FlightGear-0.9/data/Nasal/,bo105.nas,': Permission denied
The Aircraft/bo105 commit worked fine, however. Looks like an admin issue, I guess. Curt?
The new globals.nas file is attached; you will need the two new functions to run the bo105 code.
Andy
##
# Returns true if the first object is an instance of the second
# (class) object. Example: isa(someObject, props.Node)
#
isa = func {
obj = arg[0]; class = arg[1];
if(!contains(obj, "parents")) { return 0; }
foreach(c; obj.parents) {
if(c == class) { return 1; }
elsif(isa(obj, c)) { return 1; }
}
return 0;
}
##
# Invokes a FlightGear command specified by the first argument. The
# second argument specifies the property tree to be passed to the
# command as its argument. It may be either a props.Node object or a
# string, in which case it specifies a path in the global property
# tree.
#
fgcommand = func {
if(isa(arg[1], props.Node)) { _fgcommand(arg[0], arg[1]._g) }
_fgcommand(arg[0], propTree);
}
##
# Returns the SGPropertyNode argument to the currently executing
# function. Wrapper for the internal _cmdarg function that retrieves
# the ghost handlet to the argument and wraps it in a
# props.Node object.
#
cmdarg = func { props.wrapNode(_cmdarg()) }
##
# Utility. Does what it you think it does.
#
abs = func { if(arg[0] < 0) { -arg[0] } else { arg[0] } }
##
# Convenience wrapper for the _interpolate function. Takes a
# single string or props.Node object in arg[0] indicating a target
# property, and a variable-length list of time/value pairs. Example:
#
# interpolate("/animations/radar/angle",
# 180, 1, 360, 1, 0, 0,
# 180, 1, 360, 1, 0, 0,
# 180, 1, 360, 1, 0, 0,
# 180, 1, 360, 1, 0, 0,
# 180, 1, 360, 1, 0, 0,
# 180, 1, 360, 1, 0, 0,
# 180, 1, 360, 1, 0, 0,
# 180, 1, 360, 1, 0, 0);
#
# This will swing the "radar dish" smoothly through 8 revolutions over
# 16 seconds. Note the use of zero-time interpolation between 360 and
# 0 to wrap the interpolated value properly.
#
interpolate = func {
if(isa(arg[0], props.Node)) { arg[0] = arg[0]._g; }
elsif(typeof(arg[0]) != "scalar") { return; }
_interpolate(arg[0], subvec(arg, 1));
}
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