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- use "var" keywords everywhere

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- bail out if there's no autopilot at all
This commit is contained in:
mfranz 2009-01-30 21:24:59 +00:00
parent da788c973b
commit 9927e31504
1 changed files with 28 additions and 22 deletions
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50
Nasal/track_target.nas
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@ -55,28 +55,31 @@
# print("Target Tracking script loading ...");
# script defaults (configurable if you like)
default_update_period = 0.05;
default_goal_range_nm = 0.05;
default_target_root = "/ai/models/aircraft[0]";
default_min_speed_kt = 120;
var default_update_period = 0.05;
var default_goal_range_nm = 0.05;
var default_target_root = "/ai/models/aircraft[0]";
var default_min_speed_kt = 120;
# master enable switch
target_tracking_enable = 0;
var target_tracking_enable = 0;
# update period
update_period = default_update_period;
var update_period = default_update_period;
# goal range to acheive when following target
goal_range_nm = 0;
var goal_range_nm = 0;
# minimum speed so we don't drop out of the sky
min_speed_kt = 0;
var min_speed_kt = 0;
# Target property tree root
target_root = "";
var target_root = "";
# Initialize target tracking
TrackInit = func {
var TrackInit = func {
if (props.globals.getNode("autopilot") == nil)
return;
target_tracking_enable = getprop("/autopilot/target-tracking/enable");
if ( target_tracking_enable == nil ) {
target_tracking_enable = 0;
@ -112,7 +115,10 @@ settimer(TrackInit, 0);
# If enabled, update our AP target values based on the target range,
# bearing, and speed
TrackUpdate = func {
var TrackUpdate = func {
if (props.globals.getNode("autopilot") == nil)
return;
target_tracking_enable = getprop("/autopilot/target-tracking/enable");
update_period = getprop("/autopilot/target-tracking/update-period");
@ -131,29 +137,29 @@ TrackUpdate = func {
my_hdg_true_prop = sprintf("/orientation/heading-deg" );
my_hdg_true = getprop(my_hdg_true_prop);
alt_prop = sprintf("%s/position/altitude-ft", target_root );
alt = getprop(alt_prop);
var alt_prop = sprintf("%s/position/altitude-ft", target_root );
var alt = getprop(alt_prop);
if ( alt == nil ) {
print("bad property path: ", alt_prop);
return;
}
speed_prop = sprintf("%s/velocities/true-airspeed-kt", target_root );
speed = getprop(speed_prop);
var speed_prop = sprintf("%s/velocities/true-airspeed-kt", target_root );
var speed = getprop(speed_prop);
if ( speed == nil ) {
print("bad property path: ", speed_prop);
return;
}
range_prop = sprintf("%s/radar/range-nm", target_root );
range = getprop(range_prop);
var range_prop = sprintf("%s/radar/range-nm", target_root );
var range = getprop(range_prop);
if ( range == nil ) {
print("bad property path: ", range_prop);
return;
}
h_offset_prop = sprintf("%s/radar/h-offset", target_root );
h_offset = getprop(h_offset_prop);
var h_offset_prop = sprintf("%s/radar/h-offset", target_root );
var h_offset = getprop(h_offset_prop);
if ( h_offset == nil ) {
print("bad property path: ", h_offset_prop);
return;
@ -161,12 +167,12 @@ TrackUpdate = func {
if ( h_offset > -90 and h_offset < 90 ) {
# in front of us
range_error = range - goal_range_nm;
var range_error = range - goal_range_nm;
} else {
# behind us
range_error = goal_range_nm - range;
var range_error = goal_range_nm - range;
}
target_speed = speed + range_error * 100.0;
var target_speed = speed + range_error * 100.0;
if ( target_speed < min_speed_kt ) {
target_speed = min_speed_kt;
}