47 lines
1,005 B
Go
47 lines
1,005 B
Go
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package generativeart
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import (
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"github.com/aquilax/go-perlin"
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"github.com/fogleman/gg"
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"math"
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"math/rand"
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)
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type contourLine struct {
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lineNum int
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}
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func NewContourLine(lineNum int) *contourLine{
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return &contourLine{
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lineNum: lineNum,
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}
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}
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// Generative draws a contour line image.
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func (cl *contourLine) Generative(c *canva) {
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ctex := gg.NewContextForRGBA(c.img)
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noise := perlin.NewPerlin(2, 2, 3, rand.Int63())
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for i:=0; i<cl.lineNum;i++ {
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cl := c.opts.colorSchema[rand.Intn(len(c.opts.colorSchema))]
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for j :=0; j<5;j++ {
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x := rand.Float64()*float64(c.width)
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y := rand.Float64()*float64(c.height)
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theta := noise.Noise2D(x/800.0, y/800.0) * math.Pi*2*800
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x += math.Cos(theta)*0.4
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y += math.Sin(theta)*0.4
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ctex.SetColor(cl)
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ctex.DrawEllipse(x, y, 1, 1)
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ctex.Fill()
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if x > float64(c.width) || x < 0 || y > float64(c.height) || y < 0 || rand.Float64() < 0.001 {
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x = rand.Float64()*float64(c.width)
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y = rand.Float64()*float64(c.height)
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}
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}
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}
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}
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