On Tuesday 09 May 2006 01:52 pm, GSR - FR wrote: > Hi, > > adam@xxxxxxxx (2006-05-09 at 1654.44 +0100): > > Joao S. O. Bueno Calligaris wrote: > > > On Monday 08 May 2006 10:51 pm, GSR - FR wrote: > > >> That reminds me another parameter, velocity (or time delta, it > > >> is related) and that airbrush had issues with high speed... > > >> anybody knows the exact definition and use of > > >> gimp_paint_core_paint's guint32 time (I traced to > > >> http://developer.gimp.org/api/2.0/app/GimpPaintCore.html but > > >> says nothing)? > > > > > > I tried to fiddle with it once (implementing speed as a way to > > > select the frame of animated brushes), and got mostly lost > > > myself. All I know is that the ink tool has a different > > > implementation that does "time smoothing" or something to > > > interpolate the gtk+ event time. > > [...] > > > I don't think that any other brushes at the time were velocity- > > sensitive (are they now?), hence the private implementation. > > Animated brushes can be saved with such config... but it does > nothing as it is not implemented publicly, so I guess anybody that > tries the setting just gives up and saves with any of the other > options from the drop downs. Hmm.it does now - the patcjh for it has been comited some months ago - but, it doe slittle- not very usefull without a callibration curve and a way to smooth down the time coordinates, just as the paint tool does. > > The other use case for using the time is the airbrush. I looked at > it time ago and looked again due this thread, first idea was > checking the remaining of airbrush timer, but there seems to be > none (yet?). It is required as airbrush stamps every X time, but if > you move faster, the effect of time is ignored, getting stronger > stampings than what really should happen. > > So no, there is no current use of velocity, but just cos it is not > implemented, and thus nobody thinks about possible uses. Sounds a > bit recursive. ;] Ok - there is a velocity setting on the animated brushes, so we broke the recursion...we just need a volunteer to factor out the ink tool use of it, and implement a velocity calibration curve for the strokes. :-) > > GSR > > _______________________________________________ > Gimp-developer mailing list > Gimp-developer@xxxxxxxxxxxxxxxxxxxxxx > https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer _______________________________________________ Gimp-developer mailing list Gimp-developer@xxxxxxxxxxxxxxxxxxxxxx https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer
