Hi Mike,
thanks for this! I'll have a look
:)
Till
> On 03. May 2017, at 03:55, Michael Olsen <[email protected]> wrote:
>
> Hi Till,
>
> I've provided two different implementations of the rosettacode.org example
> ODE here: https://cm-gitlab.stanford.edu/mjolsen/RK4.git to give you an idea
> of how to implement your Lotka-Volterra oscillators.
>
> The first method only uses faust objects and suffers from the caveat that the
> ODE solution occurs at the audio rate. Whether or not that is okay depends on
> how large the error is running at that step size.
> This was actually rather difficult to program as each stage of the RK4
> algorithm has to be fed to the output and the next stage of the algorithm and
> the output has to be recursively fed back as the next input.
>
> The second method does the RK4 processing with a c++ foreign function where
> you can process n iterations of RK4 for each audio rate sample where you
> stipulate what n is. I basically just took the C rosetta code implementation
> and modified it to work as I wanted it to.
>
> Feel free to take a look and let me know if you have any questions.
>
> Thanks,
>
> Mike Olsen
>
>
> Message: 1
> Date: Mon, 1 May 2017 12:12:15 +0300
> From: Till Bovermann <[email protected]>
> Subject: [Faudiostream-users] Runge-Kutta 4th order implementation,
> how to?
> To: faudiostream-users users
> <[email protected]>
> Message-ID: <[email protected]>
> Content-Type: text/plain; charset=us-ascii
>
> Hello again,
>
>
> I am interested in creating a complex oscillator based on the Lotka-Volterra
> model.
> https://en.wikipedia.org/wiki/Lotka%E2%80%93Volterra_equations
>
> Here is an imperative implementation based on 4th order runge-kutta for
> sound purposes:
> https://github.com/supercollider/sc3-plugins/blob/master/source/ChaosUGens/PredPrey.cpp#L224
>
> How would I implemented something like this in Faust?
>
> here is a decent implementation example stack for different languages
> https://rosettacode.org/wiki/Runge-Kutta_method
>
> but they are not flow-based, so I feel out of luck.
>
> Any help or pointers are much appreciated
>
> Till
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