DSP Robotics Support

Posted: **Tue Jul 05, 2016 10:04 pm**

Hi,

Is it possible to build a slow Ruby Ramp generator?

I have looked on the forum and tried to make one in Ruby but it crashes, pretty much on every try...
I need to make many random ramps that are slow, and was hoping I could do it in Ruby. I landed doing it in the DSP, but was wondering if slow waveforms can also be generated in Ruby as well ? ? ? And by slow I mean about 10 samples per second or so...

I forgot to save before I ran it - it crashed, but I took a screenshot :oops:

: Failed Ruby Ramp...; Ruby_Ramp.JPG (52.22 KiB) Viewed 10275 times

Thanks for any help or suggestions,

Aron

Posted: **Tue Jul 05, 2016 10:55 pm**

yes, this can be done. However, I'm not sure what you're trying to achieve exactly, so here are my few attempts:

1. From the image I see it seems you what to generate a wavetable for a ramp.

Code: Select all

#inputs should be named "length" (float) and "tick" (trigger)
def event(i,v,t)
if i=="tick"

output 0, (0...@length).map{|i|
i.to_f/@length
}

end
end

2. If you want to generate a slowly changing green float output.

Code: Select all

#input should be named "on" (boolean) and "period" (float)

def event(i,v,t)
if @on
@dt=t - (@dt||t)

@ramp=(@ramp||0.0+@dt/@period)%1.0
output 0,@ramp
input 99,nil,time+0.1 #change this 0.1 to whatever tick speed you need.
else
@ramp=0.0
@dt=nil
end
end

this will generate ramp that goes from 0 to 1 in predefined period time.

Posted: **Wed Jul 06, 2016 4:19 am**

OK...

I entered the Ruby code and while it produces an output it is not a ramp. I am still working thru this... a few of the code lines do not make sense to me at all, but I AM NOT a Ruby coder, but I am learning.

The input 99 is a callback to the input for ???

Here is my code...

Ruby_Ramp_01.fsm: Ruby Ramp; (65.82 KiB) Downloaded 954 times

does this look correct? It just seems complex for something like an up counter, but again I am not a Ruby coder :shock:

And to answer a previous question, I need a float output NOT an array... I can get the array version working, but not the "Streaming Green" version.

Thanks again,

Aron

DSP Robotics Support

Slow Ruby Ramp Generator

Slow Ruby Ramp Generator

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