experiments and stuff

pkg/dithering/grid.go

@@ -5,6 +5,8 @@ import (
 	"image/color"
 )
 
+const side = 16
+
 type grid struct {
 	color.Gray
 }
@@ -14,16 +16,17 @@ func (_ grid) ColorModel() color.Model {
 }
 
 func (_ grid) Bounds() image.Rectangle {
-	return image.Rect(0, 0, 8, 8)
+	return image.Rect(0, 0, side, side)
 }
 
 func (g grid) At(x, y int) color.Color {
-	n := g.Gray.Y / 4
+	n := uint8(g.Gray.Y * 10)
+
 	if n == 0 {
 		return color.Black
 	}
-	step := int(64 / n)
+	step := int((side*side-1) / n)
-	if (y*8+x)%step == 0 {
+	if (y*side+x)%step == 0 {
 		return color.White
 	}
 	return color.Black