chore: cleanup

2026-02-28 16:36:53 +01:00
parent 13dde0b4e9
commit 4bffb6214f
5 changed files with 333 additions and 362 deletions
--- a/xBitPolygons.go
+++ b/xBitPolygons.go
@@ -0,0 +1,138 @@
+package main
+
+import (
+	"slices"
+	"strconv"
+
+	"github.com/fogleman/gg"
+)
+
+func XBitPolygons(dc *gg.Context, username string, columns int, rows int) {
+	hash := hash(username)
+
+	dc.SetRGB255(255, 255, 255)
+	dc.DrawRectangle(0, 0, 800, 800)
+	dc.Fill()
+
+	colorString := hash[0:6]
+	r, g, b := rgbFromHex(colorString)
+	dc.SetRGB255(r, g, b)
+
+	enabledVertices := [][]bool{}
+	for _, character := range hash[6:6+rows+1] {
+		integer, _ := strconv.ParseUint(string(character), 16, columns/2+1)
+		row := []bool{}
+		for j := range columns/2+1 {
+			on := hasBit(integer, j)
+			row = append(row, on)
+		}
+		enabledVertices = append(enabledVertices, row)
+	}
+
+	w := 800 / columns
+	h := 800 / rows
+
+	for i := range rows {
+		for j := range columns/2 {
+			topLeft, tlx, tly := enabledVertices[i][j], float64(j*w), float64(i*h)
+			topRight, trx, try := enabledVertices[i][j+1], float64(j*w+w), float64(i*h)
+			bottomRight, brx, bry := enabledVertices[i+1][j+1], float64(j*w+w), float64(i*h+h)
+			bottomLeft, blx, bly := enabledVertices[i+1][j], float64(j*w), float64(i*h+h)
+			mx, my := tlx + float64(w/2), tly + float64(h/2)
+
+			count := 0
+			if topLeft {count++}
+			if topRight {count++}
+			if bottomRight {count++}
+			if bottomLeft {count++}
+
+			if topLeft && topRight {
+				dc.NewSubPath()
+				dc.MoveTo(mx, my)
+				dc.LineTo(tlx, tly)
+				dc.LineTo(trx, try)
+				dc.ClosePath()
+			}
+
+			if topRight && bottomRight {
+				dc.NewSubPath()
+				dc.MoveTo(mx, my)
+				dc.LineTo(trx, try)
+				dc.LineTo(brx, bry)
+				dc.ClosePath()
+			}
+
+			if bottomRight && bottomLeft {
+				dc.NewSubPath()
+				dc.MoveTo(mx, my)
+				dc.LineTo(brx, bry)
+				dc.LineTo(blx, bly)
+				dc.ClosePath()
+			}
+
+			if bottomLeft && topLeft {
+				dc.NewSubPath()
+				dc.MoveTo(mx, my)
+				dc.LineTo(blx, bly)
+				dc.LineTo(tlx, tly)
+				dc.ClosePath()
+			}
+			dc.Fill()
+		}
+	}
+
+	// Reverse
+	for i := range len(enabledVertices) {
+		slices.Reverse(enabledVertices[i])
+	}
+
+	// Mirror left side
+	for i := range rows {
+		for j := range columns/2 {
+			topLeft, tlx, tly := enabledVertices[i][j], float64(w*(columns/2)+j*w), float64(i*h)
+			topRight, trx, try := enabledVertices[i][j+1], float64(w*(columns/2)+j*w+w), float64(i*h)
+			bottomRight, brx, bry := enabledVertices[i+1][j+1], float64(w*(columns/2)+j*w+w), float64(i*h+h)
+			bottomLeft, blx, bly := enabledVertices[i+1][j], float64(w*(columns/2)+j*w), float64(i*h+h)
+			mx, my := tlx+float64(w/2), tly+float64(h/2)
+
+			count := 0
+			if topLeft {count++}
+			if topRight {count++}
+			if bottomRight {count++}
+			if bottomLeft {count++}
+
+			if topLeft && topRight {
+				dc.NewSubPath()
+				dc.MoveTo(mx, my)
+				dc.LineTo(tlx, tly)
+				dc.LineTo(trx, try)
+				dc.ClosePath()
+			}
+
+			if topRight && bottomRight {
+				dc.NewSubPath()
+				dc.MoveTo(mx, my)
+				dc.LineTo(trx, try)
+				dc.LineTo(brx, bry)
+				dc.ClosePath()
+			}
+
+			if bottomRight && bottomLeft {
+				dc.NewSubPath()
+				dc.MoveTo(mx, my)
+				dc.LineTo(brx, bry)
+				dc.LineTo(blx, bly)
+				dc.ClosePath()
+			}
+
+			if bottomLeft && topLeft {
+				dc.NewSubPath()
+				dc.MoveTo(mx, my)
+				dc.LineTo(blx, bly)
+				dc.LineTo(tlx, tly)
+				dc.ClosePath()
+			}
+			dc.Fill()
+		}
+	}
+}