57 lines
1.1 KiB
Go
57 lines
1.1 KiB
Go
package main
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import (
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"math/rand"
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"image"
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"image/color"
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"image/draw"
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"image/png"
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"os"
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iu "git.nkpl.cc/twocookedfaggots/imageutils"
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)
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func square(side int) image.Rectangle { return image.Rect(0, 0, side, side) }
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func Circles(b image.Rectangle, radius int) chan iu.Circle {
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ch := make(chan iu.Circle)
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go func() {
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defer close(ch)
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for {
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x, y := rand.Int()%b.Dx(), rand.Int()%b.Dy()
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dxdy := b.Dx()*b.Dy()
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r := rand.Int() % (dxdy/(dxdy/radius))
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ch <- iu.Circle{image.Point{x, y}, r}
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}
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}()
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return ch
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}
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// Converts color.Opaque and color.Transparent to color.Black and color.White respectively.
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var BlackAndWhite = color.ModelFunc(
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func(c color.Color) color.Color {
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if color.AlphaModel.Convert(c) == color.Opaque {
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return color.Black
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}
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return color.White
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},
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)
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func main() {
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canvas := image.NewRGBA(square(1024))
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circles := Circles(canvas.Bounds(), 1024/16)
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// draw n circles
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for i := 0; i < 100; i++ {
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c := <-circles
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draw.DrawMask(
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canvas, canvas.Bounds(), &image.Uniform{color.White},
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image.Point{}, c, image.Point{}, draw.Over,
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)
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}
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err := png.Encode(os.Stdout, canvas)
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if err != nil {
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panic(err)
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}
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}
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