Nevermind. I found the Nasal docs.
----- Original Message -----
From: <[EMAIL PROTECTED]>
To: "FlightGear developers discussions" <flightgear-devel@flightgear.org>
Sent: Thursday, June 09, 2005 4:26 PM
Subject: Re: [Flightgear-devel] NASAL error
I know this is an incredibly dumb question.. but in Nasal an "elseif"
conditon is expressed as "elsif"?
----- Original Message -----
From: "Josh Babcock" <[EMAIL PROTECTED]>
To: "FlightGear developers discussions" <flightgear-devel@flightgear.org>
Sent: Thursday, June 09, 2005 3:59 PM
Subject: [Flightgear-devel] NASAL error
OK, this works great: (other than the fact that it doesn't actually do
anything yet)
gearLightCheck = func {
for (i=0; i<3; i=i+1) {
thisProp = "/gear/gear[" ~ i ~ "]/position-norm";
if ( getprop(thisProp) == 1 ) {
print("green");
} elsif ( getprop(thisProp) == 0 ) {
print("off");
} else {
print("red");
}
}
settimer(gearLightCheck, 5);
}
but this
gearLightCheck = func {
for (i=0; i<3; i=i+1) {
thisProp = "/gear/gear[" ~ i ~ "]/position-norm";
if ( getprop(thisProp) == 1 ) {
print("green");
} elsif ( getprop(thisProp) < 1 ) { <---- Line 143
print("red");
} else {
print("off");
}
}
settimer(gearLightCheck, 5);
}
produces this error:
Nasal runtime error: nil used in numeric context
at /usr/local/share/FlightGear/data/Aircraft/b29/b29.nas, line 143
I know these props are set, because I put the following in the set.xml
file:
<controls>
<gear>
<nosewheel-caster type="bool" archive="y">true</nosewheel-caster>
<antiskid type="bool" archive="y">false</antiskid>
<gear num="0">
<position-norm>0</position-norm>
</gear>
<gear num="1">
<position-norm>0</position-norm>
</gear>
<gear num="2">
<position-norm>0</position-norm>
</gear>
<gear num="3">
<position-norm>0</position-norm>
</gear>
</gear>
</controls>
As an aside, the initial output looks like this:
b29-common.xml initialized
0: red
1: red
2: red
3: red
WARNING: Legacy engine definition in YASim configuration file. Please
fix.
WARNING: Legacy engine definition in YASim configuration file. Please
fix.
WARNING: Legacy engine definition in YASim configuration file. Please
fix.
WARNING: Legacy engine definition in YASim configuration file. Please
fix.
0: green
1: green
2: green
3: green
0: green
1: green
2: green
3: green
Any thoughts?
Josh
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