Pseudorandom number generator image: Difference between revisions
Pseudorandom number generator image (view source)
Revision as of 19:16, 17 September 2020
, 3 years agoAdded Go
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* Linear congruential generator [https://en.wikipedia.org/wiki/Linear_congruential_generator].
=={{header|Go}}==
The math/rand package uses a custom algorithm attributed to D.P.Mitchell and J.A.Reeds. It doesn't need to be seeded by a prime number. Typically (as here) the seed is generated from the current time.
The image is saved to a .png file which can then be viewed with a utility such as EOG.
<lang go>package main
import (
"image"
"image/color"
"image/png"
"log"
"math/rand"
"os"
"time"
)
func main() {
rand.Seed(time.Now().UnixNano())
img := image.NewNRGBA(image.Rect(0, 0, 1000, 1000))
for x := 0; x < 1000; x++ {
for y := 0; y < 1000; y++ {
col := color.RGBA{uint8(rand.Intn(256)), uint8(rand.Intn(256)), uint8(rand.Intn(256)), 255}
img.Set(x, y, col)
}
}
fileName := "pseudorandom_number_generator.png"
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)
}
}</lang>
=={{header|Java}}==
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