gg/examples/sine.go
Michael Fogleman 215984bf96 sine
2016-02-20 15:43:08 -05:00

30 lines
501 B
Go

package main
import (
"math"
"github.com/fogleman/gg"
)
func main() {
const W = 1200
const H = 60
dc := gg.NewContext(W, H)
// dc.SetHexColor("#FFFFFF")
// dc.Clear()
dc.ScaleAbout(0.95, 0.75, W/2, H/2)
for i := 0; i < W; i++ {
a := float64(i) * 2 * math.Pi / W * 8
x := float64(i)
y := (math.Sin(a) + 1) / 2 * H
dc.LineTo(x, y)
}
dc.ClosePath()
dc.SetHexColor("#3E606F")
dc.FillPreserve()
dc.SetHexColor("#19344180")
dc.SetLineWidth(8)
dc.Stroke()
dc.SavePNG("out.png")
}