Clement if it would be nice to have the fastCorner and friends added to rectangle.
On Wed, Apr 4, 2018 at 5:33 PM, Clément Bera <bera.clem...@gmail.com> wrote: > Hi Hilaire, > > Do you have to use the world or Morphic at all ? > > I wrote 2 different real-time 2D games at 50fps in Pharo [1,2]. I tried > using Morphic but that was crazy slow I could not even get 20fps. Instead I > use direct bindings to Cairo surface and SDL2 window and I don't open the > world morph at all to avoid the delays due to its cycles which are also > crazy (I open Pharo in headless, then the Pharo code opens a SDL2 window and > draws on it using Cairo). Then I was just careful on the number of > allocations, especially closures, in between frame rendering and also on > algorithms (I had 60% of time spent creating rectangle in corner: since it > performs a lot of min max computation, rewriting that to fastCorner method > without min max greatly improved the performance in my case). I still have > frame drops from time to time but that's hardly noticeable. > > If you're scared of using Cairo / SDL2 because you deploy on specific > platforms like mobiles, you can still use BitBlt. The point being not to run > WorldMorph cycles at all but instead manage yourself what is drawn. If > possible don't use Morph at all too, it has many features that likely you > don't use, slowing down your system and wasting battery on mobiles for > nothing. > > [1] https://github.com/clementbera/wizard-battle-arena > [2] https://github.com/clementbera/SpiderInvasion > > > On Wed, Apr 4, 2018, 15:49 Hilaire <hila...@drgeo.eu> wrote: >> >> Hi, >> >> I discover this Dr. Geo Smalltalk sketch to animate is about 60% slowler >> on P7 compare to P3: >> >> | fig point comment x y random inArc tries| >> "Monte-Carlo PI approximation" >> fig := DrGeoCanvas new fullscreen scale: 400. >> fig arcCenter: 0@0 from: 1@0 to: 0@1. >> fig polygon: { 0@0. 0@1. 1@1. 1@0 }. >> comment := fig texte: '' a: 0@ -0.1. >> random := Random seed: Time millisecondClockValue. >> tries := 500. >> inArc := 0. >> [1 a: tries faire: [: try | >> x := random next. >> y := random next. >> point := (fig point: x@y) small. >> (x squared + y squared) > 1 >> ifTrue: [point color: Color blue ] >> ifFalse: [inArc := inArc + 1 ]. >> comment text: 'Tries: ', try asString, ' >> approx: ', (inArc * 4 / try) asFloat asString. >> World doOneCycle. >> ] ] timeProfile >> >> The log are enclosed to compare. The mains differences seems to be >> during the world update. Years ago when porting to P3 I also see an >> important time performance degradation[1] and it remained unresolved. >> >> >> [1] http://forum.world.st/Slowness-question-tt4761717.html >> >> >> >> >> -- >> Dr. Geo >> http://drgeo.eu >> >
