[Dr. Geo] [Bug 1836768] Re: Locus need some optimization

[hilaire]

Analysis show replacing message #squaredDistance has minimal impact.
So no need to replace it.

** Changed in: drgeo
       Status: New => In Progress

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Title:
  Locus need some optimization

Status in Dr. Geo II:
  In Progress

Bug description:
  It looks like DrGLocusMorph samples a lot of off screen samples. Later
  discarded, though. But it consumes a lot of computer power.

  Test with this script, with a value larger than 6

  | figure f a b c|
  figure := DrGeoFigure nouveau afficherAxes afficherGrille echelle: 50.
  a := figure decimal: 1 a: 5 @ -1 min: -8 max: 8 nom: 'a' afficherValeur: true.
  b := figure decimal: 1 a: 5 @ -2 min: -8 max: 8 nom: 'b' afficherValeur: true.
  c := figure decimal: 1 a: 5 @ -3 min: -8 max: 8 nom: 'c' afficherValeur: true.
  f := [:x | a valeur * x squared + (b valeur * x) + c valeur].
  figure courbeDe: f de: -10 a: 10

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