Strange result from modulo operation

[Maerchenprinz]

Hi!

I have a quite simple animation to turn a drum in a frequency selector; It has a modulo operation (x mod 10) in it which gives correct results for all numbers except x=50, where it returns 5, what I can see by the animation of the drum
50 mod 10 is 0, isn't it?
The frequency moves in steps of 0.05, what works as I can see in the property tree... I'm clueless...
FG version is 2020.4.0, revision 7db47beb0e4aca554277173cab6524bc51d92a84

Here's the code:

Code: Select all

 <animation>
  <type>rotate</type>
   <object-name>pufreq3disc</object-name>

<!-- begin of relevant part -->
  <expression>
   <table>
    <mod>
     <product>
      <property>yak-40/Kurs-MP-70/kn_pu1-freq2</property>
      <value>100</value>
     </product>
     <value>10</value>
    </mod>
     <entry><ind>0</ind><dep>0</dep></entry>
     <entry><ind>5</ind><dep>180</dep></entry>
    </table>
  </expression>
<!-- end of relevant part -->

   <center>
    <x-m>-0.0138</x-m>
    <y-m>0.0</y-m>
    <z-m>0.0147</z-m>
   </center>
   <axis>
    <x>0.0</x>
    <y>-1.0</y>
    <z>0.0</z>
   </axis>
 </animation>

Any ideas? Anyone? Buller?!

Ciao,

Adrian

[WoodSTokk]

Thats maybe the floating point precision error.
Try this one:

Code: Select all

    <mod>
        <floor>
            <sum>
                <product>
                    <property>yak-40/Kurs-MP-70/kn_pu1-freq2</property>
                    <value>100.0</value>
                </product>
                <value>0.5</value>
            </sum>
        </floor>
        <value>10</value>
    </mod>


Or you calculate it down so that the result is 0 or 1 and use a <factor>180</factor>:

Code: Select all

    <floor>
        <div>
            <sum>
                <product>
                    <property>yak-40/Kurs-MP-70/kn_pu1-freq2</property>
                    <value>100.0</value>
                </product>
                <value>0.5</value>
            </sum>
            <value>5.0</value>
        </div>
    </floor>


[Maerchenprinz]

Hey WoodSTokk!

Great! Thanks a lot! Both solutions work out of the box!
I think even if I was really aware of the <floor> function, I wouldn't have managed to come to that solution.
Thanks!

Ciao,

Adrian