50 lines
1.2 KiB
Go
50 lines
1.2 KiB
Go
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package patterns
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import "math"
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var sineoffset int = 0
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var lastSineSpeed uint16 = 0
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func Sinewave(w int, h int, bgColor RGBcolor, fgColor RGBcolor, speed uint16) [][]RGBcolor {
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if speed != lastSineSpeed {
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lastSineSpeed = speed
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sineoffset = 0
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}
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sineoffset += int(speed/40)
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background := FillPanelRGB(w,h,bgColor)
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for x := 0; x < w; x++ {
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y := int(math.Round((math.Sin(float64(x+sineoffset))+1) / 2 * float64(h-1)))
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background[x][y] = fgColor
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}
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return background
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}
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var lastSinePos int = 0
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func SineChase(w int, h int, bgColor RGBcolor, fgColor RGBcolor, speed uint16) [][]RGBcolor {
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if speed != lastSineSpeed {
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lastSineSpeed = speed
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lastSinePos = 0
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}
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background := FillPanelRGB(w,h,bgColor)
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y := int(math.Round((math.Sin(float64(lastSinePos))+1) / 2 * float64(h-1)))
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background[lastSinePos][y] = fgColor
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lastSinePos += 1
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if lastSinePos >= w {
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lastSinePos = 0
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}
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return background
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}
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func ZigZag(w int, h int) [][]RGBcolor {
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var bgColor = [3]byte{0,0,0}
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var fgColor = [3]byte{255,0,0}
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//var a = [5]int{2, 4, 6, 8, 10}
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background := FillPanelRGB(w,h,bgColor)
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for x := 0; x < w; x++ {
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y := x % (h-1)
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background[x][y] = fgColor
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}
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return background
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}
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