On Tue, Dec 30, 2014 at 12:41 AM, Ronan Ducluzeau <[email protected]> wrote: > I just want to remind that currently nurbs weights are not working in > master since 2.5.
Tested, they work for nurbs curves & surfaces, but rather you use the bug tracker if you found some case where they fail. > If someone is interested into improving Blender's nurbs; there is a lot to > do, anyways. > > 2014-12-29 1:47 GMT+01:00 Campbell Barton <[email protected]>: > >> Heres a patch on Blender, >> Removed the restriction of power-of-2 curve resolution. >> https://developer.blender.org/P183 >> >> However I don't see any significant advantage this offers over >> existing nurbs calculation method, even though its quite efficient, it >> would need to be extended to support different orders (currently >> hard-coded to order-4), cyclic curves, nurbs weights etc... >> >> Just posting the patch for reference if anyone likes to check on the code. >> >> On Mon, Dec 29, 2014 at 8:03 AM, Campbell Barton <[email protected]> >> wrote: >> > Its available here: >> > http://download.blender.org/ftp/ton/dspline.pdf >> > >> > On Mon, Dec 29, 2014 at 7:28 AM, joe <[email protected]> wrote: >> >> Do you have a link to a paper? >> >> On Sep 28, 2014 10:45 AM, "Fred" <[email protected]> wrote: >> >> >> >>> Hi Campbell Barton, >> >>> >> >>> The amount of interpolation dots is 2^i, at the start of the demo i = >> >>> 4 (16 dots) >> >>> if you change i = 7 (the limit in the demo) than there are 128 >> >>> interpolation dots. >> >>> >> >>> if I had set the limit in the demo to 10 then 1024 interpolation dots >> >>> was possible. >> >>> >> >>> If the spline is used in a 3 dimensional space, >> >>> to compute an interpolated dot position takes: dim * 10 clock cycles >> = >> >>> 30 clock cycles. >> >>> I hope that it is fast enough. >> >>> >> >>> If you like to have a curve to the last plotted dot you have to put two >> >>> dots on each other at the end. >> >>> You will see that it is symmetrical again. >> >>> >> >>> Please change the number to 7 in the demo and you see a curved line in >> >>> stead of dots. >> >>> >> >>> Much more is possible with this spline because the first, second and >> >>> third derivative (parameterized ) of the curve >> >>> is available in real time. >> >>> >> >>> I think that much more can be invented with this spline technique. >> >>> I think that with some research tangent handles can be constructed as >> >>> well (if you like them?). >> >>> What I did in the demo was the most simple way of using it. >> >>> >> >>> The essence is: a 3th degree curve in two (x,y) or more directions is >> >>> differentiated three times, and then again integrated 3 times. >> >>> With floating point this is impossible , because it is not exact, the >> >>> curve runs away. >> >>> But with integer computing it is exact and the spline exact a 3th >> degree >> >>> curve. >> >>> >> >>> It can also be used in ten or more directions, but more then 3 >> >>> dimensions (x,y,z) is not practical. >> >>> >> >>> Fred. >> >>> -------------------------------------- >> >>> Fred schreef op 28-9-2014 om 18:30: >> >>> > That is in the demo the case, because I programmed that the first >> plot >> >>> > point is actually two points. >> >>> > the spline uses 4 points p0, p1, p2, p3 and the interpolation is >> >>> > between p1 and p2. >> >>> > >> >>> > Campbell Barton schreef op 28-9-2014 om 17:42: >> >>> >> Checked the test application, and not sure if this is intended but a >> >>> >> simple triangle has uneven distribution. >> >>> >> >> >>> >> see: http://www.graphicall.org/ftp/ideasman42/fred_curve.png >> >>> >> >> >>> >> On Mon, Sep 29, 2014 at 1:32 AM, Dan McGrath < >> [email protected]> >> >>> wrote: >> >>> >>> Cool, got them. Will take a look later. o/ >> >>> >>> >> >>> >>> Dan >> >>> >>> >> >>> >>> On Sun, Sep 28, 2014 at 11:28 AM, Fred <[email protected]> >> wrote: >> >>> >>> >> >>> >>>> Ok, It is uploaded to the directory incoming >> >>> >>>> >> >>> >>>> Dan schreef op 28-9-2014 om 17:15: >> >>> >>>>> You could always upload it to our anonymous ftp via >> >>> download.blender.org >> >>> >>>>> (or ftp.blender.org) and put it into the incoming directory (use >> >>> passive >> >>> >>>>> mode). From there was can fetch the files via >> >>> >>>>> http://download.blender.org/ftp/incoming/ >> >>> >>>>> >> >>> >>>>> Dan >> >>> >>>>> >> >>> >>>>> On Sun, Sep 28, 2014 at 11:05 AM, Fred <[email protected]> >> wrote: >> >>> >>>>> >> >>> >>>>>> Campbell Barton >> >>> >>>>>> >> >>> >>>>>> I have tried to send it but it is rejected. So send me an >> addres for >> >>> >>>>>> upload. >> >>> >>>>>> >> >>> >>>>>> fred >> >>> >>>>>> >> >>> >>>>>> >> >>> >>>>>> Campbell Barton schreef op 28-9-2014 om 16:51: >> >>> >>>>>>> Could the project files be posted to a public URL?, Id like to >> be >> >>> able >> >>> >>>>>>> to look into this. but probably wont have time over the coming >> >>> weeks. >> >>> >>>>>>> >> >>> >>>>>>> The main source file compiles for me with minor edits on >> >>> >>>>>>> Linux/FreePascal, but the demo relies on `Window` unit, which I >> >>> assume >> >>> >>>>>>> is provided by delphi/windows. >> >>> >>>>>>> >> >>> >>>>>>> On Mon, Sep 29, 2014 at 12:36 AM, Dan McGrath < >> >>> [email protected] >> >>> >>>>>> wrote: >> >>> >>>>>>>> Hey, >> >>> >>>>>>>> >> >>> >>>>>>>> Just save out the delphi project and zip it up and email it >> to me >> >>> >>>> direct >> >>> >>>>>>>> via email I guess (the mailing list wouldn't allow such a >> large >> >>> >>>>>>>> attachement). I was attempting to compile it on linux, so the >> >>> compiled >> >>> >>>>>>>> dll's wouldn't be of much use to me unfortunately. >> >>> >>>>>>>> >> >>> >>>>>>>> Thanks! >> >>> >>>>>>>> >> >>> >>>>>>>> >> >>> >>>>>>>> Dan >> >>> >>>>>>>> >> >>> >>>>>>>> On Sun, Sep 28, 2014 at 10:06 AM, Fred <[email protected]> >> >>> wrote: >> >>> >>>>>>>> >> >>> >>>>>>>>> Hi Dan, >> >>> >>>>>>>>> >> >>> >>>>>>>>> Of course I can send you the project. >> >>> >>>>>>>>> I have made two versions: >> >>> >>>>>>>>> 1) The spline is embedded in de demo: >> >>> >>>>>>>>> 2) The spline is an external .dll, de demo calls PSpline.dll >> >>> >>>>>>>>> >> >>> >>>>>>>>> Which one do you prefer? >> >>> >>>>>>>>> >> >>> >>>>>>>>> Fred. >> >>> >>>>>>>>> ---------------- >> >>> >>>>>>>>> >> >>> >>>>>>>>> >> >>> >>>>>>>>> >> >>> >>>>>>>>> Dan McGrath schreef op 28-9-2014 om 15:42: >> >>> >>>>>>>>>> So is/was Turbo Pascal (limited in features; eg: objects >> but no >> >>> >>>>>> classes) >> >>> >>>>>>>>>> and FreePascal+Lazarus (supports almost everything Delphi >> does >> >>> >>>> still? >> >>> >>>>>>>>>> http://wiki.freepascal.org/Lazarus_For_Delphi_Users). >> >>> >>>>>>>>>> >> >>> >>>>>>>>>> Anyway, just thought it was neat to see code in pascal (an >> >>> elegant >> >>> >>>>>>>>>> language, imho). Curious though, why not just give the whole >> >>> delphi >> >>> >>>>>>>>> project >> >>> >>>>>>>>>> and resource files so your forms can be built etc.? The code >> >>> seems >> >>> >>>> to >> >>> >>>>>>>>>> compile with some modifications here, but without the {$R >> *.DFM} >> >>> >>>>>> (*.lfm >> >>> >>>>>>>>> in >> >>> >>>>>>>>>> fp), one would have to manually rebuild the form :( >> >>> >>>>>>>>>> >> >>> >>>>>>>>>> >> >>> >>>>>>>>>> >> >>> >>>>>>>>>> On Sun, Sep 28, 2014 at 8:55 AM, Fred <[email protected] >> > >> >>> wrote: >> >>> >>>>>>>>>> >> >>> >>>>>>>>>>> It's true, but Delphi is object oriented. >> >>> >>>>>>>>>>> >> >>> >>>>>>>>>>> Dan McGrath schreef op 28-9-2014 om 14:53: >> >>> >>>>>>>>>>>> Standard Pascal, Turbo Pascal, Freepascal, Delphi; same >> >>> language, >> >>> >>>>>>>>>>> different >> >>> >>>>>>>>>>>> dialect :) >> >>> >>>>>>>>>>>> >> >>> >>>>>>>>>>>> On Sun, Sep 28, 2014 at 8:43 AM, Fred < >> [email protected]> >> >>> >>>> wrote: >> >>> >>>>>>>>>>>>> Actually it is Delphi >> >>> >>>>>>>>>>>>> >> >>> >>>>>>>>>>>>> >> >>> >>>>>>>>>>>>> Dan McGrath schreef op 28-9-2014 om 14:35: >> >>> >>>>>>>>>>>>>> Pascal, with inline assembler to boot! \o/ :) >> >>> >>>>>>>>>>>>>> >> >>> >>>>>>>>>>>>>> On Sun, Sep 28, 2014 at 6:46 AM, Ton Roosendaal < >> >>> >>>> [email protected]> >> >>> >>>>>>>>>>> wrote: >> >>> >>>>>>>>>>>>>>> Hi, >> >>> >>>>>>>>>>>>>>> >> >>> >>>>>>>>>>>>>>> Fred told me he's not interested in getting involved, >> or >> >>> >>>> setting >> >>> >>>>>> up >> >>> >>>>>>>>> a >> >>> >>>>>>>>>>>>>>> project for his work. >> >>> >>>>>>>>>>>>>>> He's retired now and just thought we might be >> interested >> >>> in a >> >>> >>>>>>>>> research >> >>> >>>>>>>>>>>>>>> topic he did. >> >>> >>>>>>>>>>>>>>> >> >>> >>>>>>>>>>>>>>> I've copied files he sent to me here; >> >>> >>>>>>>>>>>>>>> http://download.blender.org/ftp/ton/ >> >>> >>>>>>>>>>>>>>> >> >>> >>>>>>>>>>>>>>> It's a Dutch pdf and two pascal files. >> >>> >>>>>>>>>>>>>>> >> >>> >>>>>>>>>>>>>>> -Ton- >> >>> >>>>>>>>>>>>>>> >> >>> >>>>>>>>>>>>>>> >> -------------------------------------------------------- >> >>> >>>>>>>>>>>>>>> Ton Roosendaal - [email protected] - >> www.blender.org >> >>> >>>>>>>>>>>>>>> Chairman Blender Foundation - Producer Blender >> Institute >> >>> >>>>>>>>>>>>>>> Entrepotdok 57A - 1018AD Amsterdam - The >> Netherlands >> >>> >>>>>>>>>>>>>>> >> >>> >>>>>>>>>>>>>>> >> >>> >>>>>>>>>>>>>>> >> >>> >>>>>>>>>>>>>>> On 28 Sep, 2014, at 9:28, Aditia A. Pratama wrote: >> >>> >>>>>>>>>>>>>>> >> >>> >>>>>>>>>>>>>>>> HI Fred, >> >>> >>>>>>>>>>>>>>>> >> >>> >>>>>>>>>>>>>>>> Can you record a screencast/video demo to show how it >> >>> works? >> >>> >>>>>>>>>>>>>>>> >> >>> >>>>>>>>>>>>>>>> Regards, >> >>> >>>>>>>>>>>>>>>> On Sep 28, 2014 2:14 PM, "Fred" <[email protected] >> > >> >>> wrote: >> >>> >>>>>>>>>>>>>>>> >> >>> >>>>>>>>>>>>>>>>> I forgot to say, I have a two dimensional demo but >> it is >> >>> >>>>>> working >> >>> >>>>>>>>> on >> >>> >>>>>>>>>>> a >> >>> >>>>>>>>>>>>>>>>> windows computer. >> >>> >>>>>>>>>>>>>>>>> >> >>> >>>>>>>>>>>>>>>>> Jacob Merrill schreef op 28-9-2014 om 02:07: >> >>> >>>>>>>>>>>>>>>>>> would this make it so you can record F-curves over >> time >> >>> >>>>>> better? >> >>> >>>>>>>>>>>>>>>>>> right now recording in the engine gets slower the >> >>> longer it >> >>> >>>>>> runs, >> >>> >>>>>>>>>>>>>>>>>> _______________________________________________ >> >>> >>>>>>>>>>>>>>>>>> Bf-committers mailing list >> >>> >>>>>>>>>>>>>>>>>> [email protected] >> >>> >>>>>>>>>>>>>>>>>> >> http://lists.blender.org/mailman/listinfo/bf-committers >> >>> >>>>>>>>>>>>>>>>>> >> >>> >>>>>>>>>>>>>>>>> _______________________________________________ >> >>> >>>>>>>>>>>>>>>>> Bf-committers mailing list >> >>> >>>>>>>>>>>>>>>>> [email protected] >> >>> >>>>>>>>>>>>>>>>> >> http://lists.blender.org/mailman/listinfo/bf-committers >> >>> >>>>>>>>>>>>>>>>> >> >>> >>>>>>>>>>>>>>>> _______________________________________________ >> >>> >>>>>>>>>>>>>>>> Bf-committers mailing list >> >>> >>>>>>>>>>>>>>>> [email protected] >> >>> >>>>>>>>>>>>>>>> >> http://lists.blender.org/mailman/listinfo/bf-committers >> >>> >>>>>>>>>>>>>>> _______________________________________________ >> >>> >>>>>>>>>>>>>>> Bf-committers mailing list >> >>> >>>>>>>>>>>>>>> [email protected] >> >>> >>>>>>>>>>>>>>> >> http://lists.blender.org/mailman/listinfo/bf-committers >> >>> >>>>>>>>>>>>>>> >> >>> >>>>>>>>>>>>>> _______________________________________________ >> >>> >>>>>>>>>>>>>> Bf-committers mailing list >> >>> >>>>>>>>>>>>>> [email protected] >> >>> >>>>>>>>>>>>>> http://lists.blender.org/mailman/listinfo/bf-committers >> >>> >>>>>>>>>>>>>> >> >>> >>>>>>>>>>>>> _______________________________________________ >> >>> >>>>>>>>>>>>> Bf-committers mailing list >> >>> >>>>>>>>>>>>> [email protected] >> >>> >>>>>>>>>>>>> http://lists.blender.org/mailman/listinfo/bf-committers >> >>> >>>>>>>>>>>>> >> >>> >>>>>>>>>>>> _______________________________________________ >> >>> >>>>>>>>>>>> Bf-committers mailing list >> >>> >>>>>>>>>>>> [email protected] >> >>> >>>>>>>>>>>> http://lists.blender.org/mailman/listinfo/bf-committers >> >>> >>>>>>>>>>>> >> >>> >>>>>>>>>>> _______________________________________________ >> >>> >>>>>>>>>>> Bf-committers mailing list >> >>> >>>>>>>>>>> [email protected] >> >>> >>>>>>>>>>> http://lists.blender.org/mailman/listinfo/bf-committers >> >>> >>>>>>>>>>> >> >>> >>>>>>>>>> _______________________________________________ >> >>> >>>>>>>>>> Bf-committers mailing list >> >>> >>>>>>>>>> [email protected] >> >>> >>>>>>>>>> http://lists.blender.org/mailman/listinfo/bf-committers >> >>> >>>>>>>>>> >> >>> >>>>>>>>> _______________________________________________ >> >>> >>>>>>>>> Bf-committers mailing list >> >>> >>>>>>>>> [email protected] >> >>> >>>>>>>>> http://lists.blender.org/mailman/listinfo/bf-committers >> >>> >>>>>>>>> >> >>> >>>>>>>> _______________________________________________ >> >>> >>>>>>>> Bf-committers mailing list >> >>> >>>>>>>> [email protected] >> >>> >>>>>>>> http://lists.blender.org/mailman/listinfo/bf-committers >> >>> >>>>>> _______________________________________________ >> >>> >>>>>> Bf-committers mailing list >> >>> >>>>>> [email protected] >> >>> >>>>>> http://lists.blender.org/mailman/listinfo/bf-committers >> >>> >>>>>> >> >>> >>>>> _______________________________________________ >> >>> >>>>> Bf-committers mailing list >> >>> >>>>> [email protected] >> >>> >>>>> http://lists.blender.org/mailman/listinfo/bf-committers >> >>> >>>>> >> >>> >>>> _______________________________________________ >> >>> >>>> Bf-committers mailing list >> >>> >>>> [email protected] >> >>> >>>> http://lists.blender.org/mailman/listinfo/bf-committers >> >>> >>>> >> >>> >>> _______________________________________________ >> >>> >>> Bf-committers mailing list >> >>> >>> [email protected] >> >>> >>> http://lists.blender.org/mailman/listinfo/bf-committers >> >>> >> >> >>> > _______________________________________________ >> >>> > Bf-committers mailing list >> >>> > [email protected] >> >>> > http://lists.blender.org/mailman/listinfo/bf-committers >> >>> > >> >>> >> >>> _______________________________________________ >> >>> Bf-committers mailing list >> >>> [email protected] >> >>> http://lists.blender.org/mailman/listinfo/bf-committers >> >>> >> >> _______________________________________________ >> >> Bf-committers mailing list >> >> [email protected] >> >> http://lists.blender.org/mailman/listinfo/bf-committers >> > >> > >> > >> > -- >> > - Campbell >> >> >> >> -- >> - Campbell >> _______________________________________________ >> Bf-committers mailing list >> [email protected] >> http://lists.blender.org/mailman/listinfo/bf-committers >> > _______________________________________________ > Bf-committers mailing list > [email protected] > http://lists.blender.org/mailman/listinfo/bf-committers -- - Campbell _______________________________________________ Bf-committers mailing list [email protected] http://lists.blender.org/mailman/listinfo/bf-committers
