Re: Building a Racket client for SC

On Thu, Mar 4, 2021 at 8:20 AM James Harkins <[email protected]> wrote:
> shapeNum[0], curveValue[0]...

This, at least, is one point that *would* do with a text description somewhere.

Most envelope segment shapes don't have any associated parameter:

Env.shapeNames.asAssociations.sort { |a, b| a.value < b.value }.do(_.postln); ""

(lin -> 1)
(linear -> 1)
(exp -> 2)
(exponential -> 2)
(sin -> 3)
(sine -> 3)
(welch -> 4)
(wel -> 4)
(squared -> 6)
(sqr -> 6)
(cub -> 7)
(cubed -> 7)
(hold -> 8)

5 is missing -- that's for a curve number.

UGen inputs must be numbers.

There's no way to disambiguate "number as shape specifier" and "number
as curve parameter." (Because UGen input must be numbers, we can't use
data type to disambiguate.)

So the curve is represented with two numbers: shape number and curve
value. If the shape number is 5, the curve value takes effect;
otherwise the curve value is ignored.

hjh

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