Julia set: Difference between revisions
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Put FutureBasic entry in correct location
(FutureBasic solution moved to here from BASIC group) |
m (Put FutureBasic entry in correct location) |
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{{FormulaeEntry|page=https://formulae.org/?script=examples/Julia_set}}
=={{header|FutureBasic}}==
Line 2,042 ⟶ 1,986:
{{output}}
[[File:Julia Set.png]]
=={{header|Go}}==
Using the Goroutines results in a performance improvement of about three times on my four-core machine.
<syntaxhighlight lang="go">package main
import (
"image"
"image/color"
"image/png"
"log"
"os"
"sync"
)
func main() {
const (
width, height = 800.0, 600.0
maxIter = 255
cX, cY = -0.7, 0.27015
fileName = "julia.png"
)
img := image.NewNRGBA(image.Rect(0, 0, width, height))
var wg sync.WaitGroup
wg.Add(width)
for x := 0; x < width; x++ {
thisx := float64(x)
go func() {
var tmp, zx, zy float64
var i uint8
for y := 0.0; y < height; y++ {
zx = 1.5 * (thisx - width/2) / (0.5 * width)
zy = (y - height/2) / (0.5 * height)
i = maxIter
for zx*zx+zy*zy < 4.0 && i > 0 {
tmp = zx*zx - zy*zy + cX
zy = 2.0*zx*zy + cY
zx = tmp
i--
}
img.Set(int(thisx), int(y), color.RGBA{i, i, i << 3, 255})
}
wg.Done()
}()
}
wg.Wait()
imgFile, err := os.Create(fileName)
if err != nil {
log.Fatal(err)
}
defer imgFile.Close()
if err := png.Encode(imgFile, img); err != nil {
imgFile.Close()
log.Fatal(err)
}
}</syntaxhighlight>
=={{header|Haskell}}==
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