31 lines
497 B
Go
31 lines
497 B
Go
package main
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import (
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"math"
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)
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type Signal interface {
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Eval(t float64) float64
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}
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type Const struct{ V float64 }
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func (s Const) Eval(t float64) float64 { return s.V }
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type Sine struct {
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Amp, Freq, Phase, Bias float64
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}
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func (s Sine) Eval(t float64) float64 {
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return s.Bias + s.Amp*math.Sin(2*math.Pi*s.Freq*t+s.Phase)
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}
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type Saw struct {
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Min, Max, Period float64
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}
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func (s Saw) Eval(t float64) float64 {
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u := math.Mod(t, s.Period) / s.Period // 0..1
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return s.Min + (s.Max-s.Min)*u
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}
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