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Help with Knob animation

Claud9

Claud9

Active Member
Hello everyone,
I'm trying to modify a script I found on KSP manual.
It's a script that animates a single knob back an forth at a fixed speed.
I'm trying to add a second knob and animate it at a different speed so that at the same time they are both moving but at different speed rates.
It's the first time I'm using the "on listener" call back.
I tried this solution but is not working and only the first knob is moving. I did also some experiment with "change_listener_par" but is not working. Is something possible to move both at the same time with different speed? Thanks in advance for any help!
Code: 
on init
declare ui_knob $test1 (0,99,1)
declare $direction_test1
declare $tick_counter_test1

declare ui_knob $test2 (0,99,1)
declare $direction_test2
declare $tick_counter_test2

set_listener($NI_SIGNAL_TIMER_MS,7000)
end on

on listener
 
if($NI_SIGNAL_TYPE = $NI_SIGNAL_TIMER_MS)
if ($direction_test1 = 0)
inc($tick_counter_test1)
else
dec($tick_counter_test1)
end if
$test1 := $tick_counter_test1
if ($tick_counter_test1 = 99)
$direction_test1 := 1
end if
if ($tick_counter_test1 = 0)
$direction_test1 := 0
end if
end if

while ($NI_SIGNAL_TIMER_MS=2000)
if ($NI_SIGNAL_TYPE = $NI_SIGNAL_TIMER_MS)
if ($direction_test2 = 0)
inc($tick_counter_test2)
else
dec($tick_counter_test2)
end if
$test1 := $tick_counter_test2
if ($tick_counter_test2 = 99)
$direction_test2 := 1
end if
if ($tick_counter_test2 = 0)
$direction_test2 := 0
end if
end if
end while

end on
Click to read more...
 
This is an updated version where I'm trying to change the speed of Knob "$test2" using "change_listener_par" but now both Knobs are spinning at the same faster speed. Is there a way to have Knob "$test1' spinning at a different speed than Knob "$test2'? thanks for any help!
Code: 
on init
declare ui_knob $test1 (0,99,1)
declare $direction_test1
declare $tick_counter_test1

declare ui_knob $test2 (0,99,1)
declare $direction_test2
declare $tick_counter_test2

set_listener($NI_SIGNAL_TIMER_MS,7000)
end on

on listener
 
if($NI_SIGNAL_TYPE = $NI_SIGNAL_TIMER_MS)
if ($direction_test1 = 0)
inc($tick_counter_test1)
else
dec($tick_counter_test1)
end if
$test1 := $tick_counter_test1
if ($tick_counter_test1 = 99)
$direction_test1 := 1
end if
if ($tick_counter_test1 = 0)
$direction_test1 := 0
end if
end if

 
if ($NI_SIGNAL_TYPE = $NI_SIGNAL_TIMER_MS)
if ($direction_test2 = 0)
  change_listener_par($NI_SIGNAL_TIMER_MS,2000)
 
inc($tick_counter_test2)
else
dec($tick_counter_test2)
end if
$test2 := $tick_counter_test2
if ($tick_counter_test2 = 99)
$direction_test2 := 1
end if
if ($tick_counter_test2 = 0)
$direction_test2 := 0
end if
end if
 

end on
 
Listener is a global thing, so if you change the listener par that means it changes the number of ticks executed. You should probably update the other knob at only certain ticks (use %, modulo operator, to skip, for example, every 2nd or 3rd tick by doing % 2 or % 3 on the tick counter).
 
EvilDragon said:
Listener is a global thing, so if you change the listener par that means it changes the number of ticks executed. You should probably update the other knob at only certain ticks (use %, modulo operator, to skip, for example, every 2nd or 3rd tick by doing % 2 or % 3 on the tick counter).
Click to expand...
I don't honestly have any idea how to apply your suggestions, I'm completely new to "on listener" and "mod operator"... I have tried to find an example on KSP manual but I can't find anything similar.
 
You use modulo like any other math operator. a % b. You use that in an if clause. You don't need two queries for $NI_SIGNAL_TYPE.
 
so in you init declare a counter

declare listener_counter

..and each time your listener call-back executes increment the counter.

Now lets say I want to do something (lets call it X) every time the listener executes - then all you do is add your code for X.

But lets say I ALSO want to do something else (lets call it Y) , BUT... I only want this to happen every 3rd time the listener call back executes...

in this case put your code inside this if statement (after incrementing the listener_counter)

if listener_counter % 3 = 0
{do the Y think here}
listener_counter == 0;
end if
 
Lindon said:
so in you init declare a counter

declare listener_counter

..and each time your listener call-back executes increment the counter.

Now lets say I want to do something (lets call it X) every time the listener executes - then all you do is add your code for X.

But lets say I ALSO want to do something else (lets call it Y) , BUT... I only want this to happen every 3rd time the listener call back executes...

in this case put your code inside this if statement (after incrementing the listener_counter)

if listener_counter % 3 = 0
{do the Y think here}
listener_counter == 0;
end if
Click to expand...
Thanks for the help. I tried to follow your directions with this code. Now knob 2 seems to do something different from knob 1 but they are still moving at the same speed...
Thanks in advance for any new help!
Code: 
on init
declare ui_knob $test1 (0,99,1)
declare $direction_test1
declare $tick_counter_test1

declare ui_knob $test2 (0,99,1)
declare $direction_test2
declare $tick_counter_test2

set_listener($NI_SIGNAL_TIMER_MS,7000)
end on

on listener
 
if($NI_SIGNAL_TYPE = $NI_SIGNAL_TIMER_MS)
if ($direction_test1 = 0)
inc($tick_counter_test1)
else
dec($tick_counter_test1)
end if
$test1 := $tick_counter_test1
if ($tick_counter_test1 = 99)
$direction_test1 := 1
end if
if ($tick_counter_test1 = 0)
$direction_test1 := 0
end if
end if

if ($direction_test2   = 0)
inc($tick_counter_test2)
else
dec($tick_counter_test2)
end if
if ($tick_counter_test2 mod 3 = 0)
change_listener_par($NI_SIGNAL_TIMER_MS,5000)
$test2 := $tick_counter_test2
if ($tick_counter_test2 = 99)
$direction_test2 := 1
$tick_counter_test2:=0
end if
end if
if ($tick_counter_test2 = 0)
$direction_test2 := 0
end if
end on
 
I don't see you using modulo anywhere, also you don't need to change_listener_par at all, that will just screw things up. Also you need just a single tick counter.
 
EvilDragon said:
I don't see you using modulo anywhere, also you don't need to change_listener_par at all, that will just screw things up. Also you need just a single tick counter.
Click to expand...
The point is that I have zero ideas what a "modulo" is and how it works. The only thing I have found on KSP manual containing the word "modulo" is this:
x mod y
modulo; returns the remainder of a division e.g. 13 mod 8 returns the value 5
Without an example of code that uses "modulo' for me is not even possible to try to understand how it works...
And also if I can't change the "SIGNAL_TIMER" to have the second knob spinning at a different speed what I have to change?
 
Code: 
if listener_counter mod 3 = 0

The listener call back can and should only "run" at a single speed - its when you are in there that you decide to make a thing happen....

modulo will give you the remainder of a divide operation so:
1 mod 2 will give you 1
2 mod 2 will give you 0
3 mod 2 will give you 1
4 mod 2 will give you 0

..see how if we test for a result of 1 then we can do something at half the call back speed?

1 mod 3 gives you 1
2 mod 3 gives you 2
3 mod 3 gives you 0
4 mod 3 gives you 1
5 mod 3 gives you 2
6 mod 3 gives you 0

.. now we test for a result of 1 and we get to do something every third time the call back happens...
Code: 
on listener
      inc(listener_counter)
      if listener_counter mod 3 = 1
            {do something every three times the listener execute}
      end if

      if listener_counter  mod 2 = 1
            {do something every second time the listener executes}
      end if
 
Last edited:
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