[GEM-dev] GEM-dev Digest, Vol 112, Issue 3

[cyrille henry]

hello

Le 10/02/2017 à 14:27, Dario Pedrioli a écrit :
> Hi Cyrille,
>
> you wrote:
>
>>>> what i usualy do, is :
>>>> -put points in a table
>>>> -interpolate between this points in an other bigger table (using tabread4 / tabwrite for a simple and slow solution)
>>>> -draw the big table with a vertexbuffer
>
> It's very interesting.
> Do you have sample patch for this?
i just made one, in attachement

i don't like the look of tabread4 interpolation, but you can make an other cubic interpolation for smoother result.

>
> cheers, Dario
>
> PS: your work Egregore is fantastic
thanks

cheers
c

>
>
>
> 2017-02-10 12:00 GMT+01:00 <gem-dev-request at lists.iem.at <mailto:gem-dev-request at lists.iem.at>>:
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>     Today's Topics:
>
>        1. [curve 11] prints out "GL: invalid value" (Federico Camara Halac)
>        2. Re: [curve 11] prints out "GL: invalid value" (cyrille henry)
>
>
>     ---------- Messaggio inoltrato ----------
>     From: Federico Camara Halac <camarafede at gmail.com <mailto:camarafede at gmail.com>>
>     To: gem-dev at lists.iem.at <mailto:gem-dev at lists.iem.at>
>     Cc:
>     Date: Thu, 9 Feb 2017 17:13:36 -0500
>     Subject: [GEM-dev] [curve 11] prints out "GL: invalid value"
>     Hi,
>
>     I’m on OSX 10.11.6, Gem working (via deken)
>
>     When rendering is on, this prints out “GL: invalid value” to the console:
>
>     [gemhead]
>     |
>     [curve 11]
>
>     (or any number above 10)
>
>     The curve object with its inlets create accordingly, but there is nothing displaying on the gemwin. The same happens if I send a list of > 10 xyz triplets to a rendering [curve] without argument.
>
>     The problem dissapears and [curve] works fine with 10 or less arguments.
>
>     [polygon], however, works correctly, as one would expect with "no maximum number of control-points.”
>
>     Anyway, not a huge deal but I’m wondering if either there is a solution of I’m doing something wrong, like assuming unlimited points in bezier curves are a thing.
>
>     Thanks!
>
>     fd
>
>     —
>     fedecamarahalac.com <http://fedecamarahalac.com>
>
>
>
>     ---------- Messaggio inoltrato ----------
>     From: cyrille henry <ch at chnry.net <mailto:ch at chnry.net>>
>     To: gem-dev at lists.iem.at <mailto:gem-dev at lists.iem.at>
>     Cc:
>     Date: Thu, 9 Feb 2017 23:35:33 +0100
>     Subject: Re: [GEM-dev] [curve 11] prints out "GL: invalid value"
>     hello,
>
>     A Bezier curve did not pass throw the control point, and Bezier curve with lot's of control points are very slow to compute. So high order Bezier curve are not very common.
>     the curve object compute the interpolation by the GPU, so the limit is a hardware limit (the "GL: invalid value" is a hardware error, not a Gem one).
>
>
>     Usually, people prefers splines. According to wikipedia, the most common spline is cubic B-spline : a piecewise 3rd order Bezier curve.
>
>     unfortunately, there is no "spline" object in Gem.
>
>     what i usualy do, is :
>     -put points in a table
>     -interpolate between this points in an other bigger table (using tabread4 / tabwrite for a simple and slow solution)
>     -draw the big table with a vertexbuffer
>
>     cheers
>     C
>
>
>     Le 09/02/2017 à 23:13, Federico Camara Halac a écrit :
>
>         Hi,
>
>         I’m on OSX 10.11.6, Gem working (via deken)
>
>         When rendering is on, this prints out “GL: invalid value” to the console:
>
>         [gemhead]
>         |
>         [curve 11]
>
>         (or any number above 10)
>
>         The curve object with its inlets create accordingly, but there is nothing displaying on the gemwin. The same happens if I send a list of > 10 xyz triplets to a rendering [curve] without argument.
>
>         The problem dissapears and [curve] works fine with 10 or less arguments.
>
>         [polygon], however, works correctly, as one would expect with "no maximum number of control-points.”
>
>         Anyway, not a huge deal but I’m wondering if either there is a solution of I’m doing something wrong, like assuming unlimited points in bezier curves are a thing.
>
>         Thanks!
>
>         fd
>
>         —
>         fedecamarahalac.com <http://fedecamarahalac.com> <http://fedecamarahalac.com>
>
>
>
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