23 lines
600 B
Go
23 lines
600 B
Go
package artist
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import "image/color"
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// Noisy is a pattern that randomly interpolates between two patterns in a
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// deterministic fashion.
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type Noisy struct {
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Low Pattern
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High Pattern
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Seed uint32
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}
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// AtWhen satisfies the pattern interface.
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func (pattern Noisy) AtWhen (x, y, width, height int) (c color.RGBA) {
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special := uint32(x + y * 348905)
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special += (pattern.Seed + 1) * 15485863
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random := (special * special * special % 2038074743)
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fac := float64(random) / 2038074743.0
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return LerpRGBA (
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pattern.Low.AtWhen(x, y, width, height),
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pattern.High.AtWhen(x, y, width, height), fac)
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}
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