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https://github.com/nikolaydubina/calendarheatmap.git
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56 lines
1.4 KiB
Go
56 lines
1.4 KiB
Go
package colorscales
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import (
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"image/color"
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"math"
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)
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// ColorScale9 is color scale with 9 colors
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type ColorScale9 [9]color.RGBA
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// GetColor returns color based on float value from 0 to 1
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func (c ColorScale9) GetColor(val float64) color.RGBA {
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maxIdx := 8
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idx := int(math.Round(float64(maxIdx) * val))
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return c[idx]
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}
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// PuBu9 is Purple-Blue colorscale 9 colors
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var PuBu9 = ColorScale9{
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color.RGBA{255, 247, 251, 255},
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color.RGBA{236, 231, 242, 255},
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color.RGBA{208, 209, 230, 255},
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color.RGBA{166, 189, 219, 255},
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color.RGBA{116, 169, 207, 255},
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color.RGBA{54, 144, 192, 255},
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color.RGBA{5, 112, 176, 255},
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color.RGBA{4, 90, 141, 255},
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color.RGBA{2, 56, 88, 255},
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}
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// GnBu9 is Green-Blue colorscale 9 colors
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var GnBu9 = ColorScale9{
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color.RGBA{247, 252, 240, 255},
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color.RGBA{224, 243, 219, 255},
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color.RGBA{204, 235, 197, 255},
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color.RGBA{168, 221, 181, 255},
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color.RGBA{123, 204, 196, 255},
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color.RGBA{78, 179, 211, 255},
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color.RGBA{43, 140, 190, 255},
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color.RGBA{8, 104, 172, 255},
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color.RGBA{8, 64, 129, 255},
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}
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// YlGn9 is Yellow-Green colorscale 9 colors
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var YlGn9 = ColorScale9{
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color.RGBA{255, 255, 229, 255},
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color.RGBA{247, 252, 185, 255},
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color.RGBA{217, 240, 163, 255},
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color.RGBA{173, 221, 142, 255},
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color.RGBA{120, 198, 121, 255},
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color.RGBA{65, 171, 93, 255},
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color.RGBA{35, 132, 67, 255},
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color.RGBA{0, 104, 55, 255},
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color.RGBA{0, 69, 41, 255},
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}
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