cmd: send group

internal/util/map.go

@@ -0,0 +1,16 @@
+package util
+
+import "math"
+
+func ShortDistance(w, h uint32, x1, y1, x2, y2 float64) float64 {
+	dx := math.Abs(x2 - x1)
+	dy := math.Abs(y2 - y1)
+	if dx > float64(w/2) {
+		dx = float64(h) - dx
+	}
+	if dy > float64(h/2) {
+		dy = float64(h) - dy
+	}
+	return math.Sqrt(math.Pow(dx, 2) + math.Pow(dy, 2))
+
+}