Melchior FRANZ wrote:
> But only if the animation was triggered and as long as the movement
> lasts, which is a time where the "operator" watches the animation,
> anyway, and couldn't care less about a few extra cycles. Apart from
> that there should be zero overhead. Have I misunderstood the
> settimer command?
Your code works just fine. But if settimer() was the *only* method
for doing animations via scripts, then *every* animation would be done
with a timer handler and we'd potentially have many timers going off
every frame. It's easy to see every model (maybe a few dozen around a
busy aircraft) having many timers (blinking lights, rotating beacons,
rolling wheels...).
That's slow. For numeric work, Nasal is hundreds of times slower than
equivalent C code; for string handling, it's more like 5x, and for big
allocation/hashtable work like dictionary searching it's probably only
twice as slow. But still, thrashing at a script 20 times a second is
going to be suboptimal. :)
And honestly I find the interpolate() interface to be simpler and
cleaner than timers; what's supposed to be happening is smooth change,
but a "timer" represents a discrete event.
This is the (untested) replacement code I wrote for bo105.nas as a
sample of the interpolator stuff. It goes inline in the -set.xml
file, rather than living in its own file:
<input>
<keyboard>
<key n="67">
<name>C</name>
<desc>open/close rear door</desc>
<binding n="0">
<command>nasal</command>
<script>bo105.toggleDoor()</script>
</binding>
</key>
</keyboard>
</input>
<nasal>
<bo105>
<script><[CDATA[
prop = "/controls/rear/door";
swingTime = 2.5; # Time to swing from open to closed
target = 1; # Start closed, so initial target is "open"
# Utility, put this in globals...
abs = func { if(arg[0] < 0) { -arg[0] } else { arg[0] } }
toggleDoor = func {
val = getprop(prop);
time = abs(val - target) * swingTime;
interpolate(prop, target, time);
target = !target;
}
]]></script>
</bo105>
</nasal>
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