55 lines
1.2 KiB
Go
55 lines
1.2 KiB
Go
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package generativeart
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import (
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"github.com/fogleman/gg"
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"math/rand"
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)
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type girdSquares struct{}
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// NewGirdSquares returns a grid squares generator.
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func NewGirdSquares() *girdSquares {
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return &girdSquares{}
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}
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// Generative draws a grid squares image.
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func (g *girdSquares) Generative(c *canva) {
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ctex := gg.NewContextForRGBA(c.img)
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step := c.opts.step
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rectSize := c.opts.rectLenSide
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for x := 0; x < c.width; x += step {
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for y := 0; y < c.height; y += step {
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cl := c.opts.colorSchema[rand.Intn(255)]
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x0 := float64(x)
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y0 := float64(y)
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s := float64(rectSize)
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theta := rand.Intn(360) + 1
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for i := 0; i < c.opts.nIters; i++ {
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ctex.Push()
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ctex.Translate(x0+float64(step/2), y0+float64(step/2))
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ctex.Rotate(gg.Radians(float64(theta * i)))
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ctex.Scale(s, s)
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ctex.LineTo(-0.5, 0.5)
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ctex.LineTo(0.5, 0.5)
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ctex.LineTo(0.5, -0.5)
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ctex.LineTo(-0.5, -0.5)
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ctex.LineTo(-0.5, 0.5)
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ctex.SetLineWidth(c.opts.lineWidth)
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ctex.SetColor(c.opts.lineColor)
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ctex.StrokePreserve()
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ctex.SetRGBA255(int(cl.R), int(cl.G), int(cl.B), c.opts.alpha)
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ctex.Fill()
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ctex.Pop()
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s = s - c.opts.decay*float64(rectSize)
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}
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}
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}
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}
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