Data commit

Task/Peano-curve/Go/peano-curve.go

@@ -0,0 +1,40 @@
+package main
+
+import "github.com/fogleman/gg"
+
+var points []gg.Point
+
+const width = 81
+
+func peano(x, y, lg, i1, i2 int) {
+    if lg == 1 {
+        px := float64(width-x) * 10
+        py := float64(width-y) * 10
+        points = append(points, gg.Point{px, py})
+        return
+    }
+    lg /= 3
+    peano(x+2*i1*lg, y+2*i1*lg, lg, i1, i2)
+    peano(x+(i1-i2+1)*lg, y+(i1+i2)*lg, lg, i1, 1-i2)
+    peano(x+lg, y+lg, lg, i1, 1-i2)
+    peano(x+(i1+i2)*lg, y+(i1-i2+1)*lg, lg, 1-i1, 1-i2)
+    peano(x+2*i2*lg, y+2*(1-i2)*lg, lg, i1, i2)
+    peano(x+(1+i2-i1)*lg, y+(2-i1-i2)*lg, lg, i1, i2)
+    peano(x+2*(1-i1)*lg, y+2*(1-i1)*lg, lg, i1, i2)
+    peano(x+(2-i1-i2)*lg, y+(1+i2-i1)*lg, lg, 1-i1, i2)
+    peano(x+2*(1-i2)*lg, y+2*i2*lg, lg, 1-i1, i2)
+}
+
+func main() {
+    peano(0, 0, width, 0, 0)
+    dc := gg.NewContext(820, 820)
+    dc.SetRGB(1, 1, 1) // White background
+    dc.Clear()
+    for _, p := range points {
+        dc.LineTo(p.X, p.Y)
+    }
+    dc.SetRGB(1, 0, 1) // Magenta curve
+    dc.SetLineWidth(1)
+    dc.Stroke()
+    dc.SavePNG("peano.png")
+}