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Nasal: optimises properties in lp filter

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Use geNode instead of getprop
This commit is contained in:
Richard Harrison 2022-04-03 18:03:03 +02:00
parent f3b455b699
commit 304836f41a
1 changed files with 4 additions and 3 deletions
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7
Nasal/aircraft.nas
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@ -254,6 +254,7 @@ var lowpass = {
var m = { parents: [lowpass] }; var m = { parents: [lowpass] };
m.coeff = coeff >= 0 ? coeff : die("aircraft.lowpass(): coefficient must be >= 0"); m.coeff = coeff >= 0 ? coeff : die("aircraft.lowpass(): coefficient must be >= 0");
m.value = nil; m.value = nil;
m.delta_sec_node = props.globals.getNode("/sim/time/delta-sec",1);
return m; return m;
}, },
# filter(raw_value) -> push new value, returns filtered value # filter(raw_value) -> push new value, returns filtered value
@ -270,9 +271,9 @@ var lowpass = {
me.value = v; me.value = v;
}, },
_filter_: func(v) { _filter_: func(v) {
var dt = getprop("/sim/time/delta-sec"); me.dt = me.delta_sec_node.getValue();
var c = dt / (me.coeff + dt); me.c = me.dt / (me.coeff + me.dt);
me.value = v * c + me.value * (1 - c); me.value = v * me.c + me.value * (1 - me.c);
}, },
}; };