[PD-dev] pow~ in Cyclone [was: Re: stripping down Pd-extended's default libs]
hans at eds.org
Wed Feb 18 18:40:10 CET 2009
On Feb 18, 2009, at 10:02 AM, Andy Farnell wrote:
> On Wed, 18 Feb 2009 15:21:28 +0100
> IOhannes m zmoelnig <zmoelnig at iem.at> wrote:
>> but which [pow~] _is_ the right one, and which one is backward?
> The vanilla one is correct. It is consistent with mathematical
> and common syntactical properties of other asymmetrical
> (non commutative) operators
> subtract A - B the second operand is the amount subtracted from
> the first
> operand (minuend) and the inlet order reflects this.
> divide A/B the second operand (divisor) is the second inlet
> the first operand (dividend) is the first inlet.
> So, for exponentiation A^B the first operand (base) is the first
> inlet, and the second operand (exponent) is the second inlet.
> It's also that the signal domain [pow~] is consistent with
> the existing and long established message domain [pow]
> At the risk of causing offence, Cyclone [pow~] made a mistake
> ordering inlets and I don't think it's good to take the broken
> Microsoft approach of putting historical, backwards compatability
> above correctness and future simplicity of code.
> (FWIW I personally had to change dozens of my own patches
> including those already documented in a textbook - the pain
> is worth the gain to do things right.)
Well, the point of cyclone is to be compatible with Max/MSP and all
its warts. So if you are trying to run a Max patch in Pd, then
cyclone's pow~ is correct.
It would be possible to have a somewhat usable system built around
unique names. Basically, there would need to be a central registry of
names, where people would check before naming their objects. Once a
name exists, it could not be used again. So Pd-vanilla's pow~ would
have to be called something else. I can't see any other way to do it,
and this has been discussed since at least 2000.
> Use the source
> Pd-dev mailing list
> Pd-dev at iem.at
"[T]he greatest purveyor of violence in the world today [is] my own
government." - Martin Luther King, Jr.
More information about the Pd-dev