delaunay mapgen 1st version

engine/types/egde.go

@@ -4,3 +4,23 @@ type Edge struct {
 	From Coords
 	To   Coords
 }
+
+func (e *Edge) Midpoint() Coords {
+	var dx, dy, minX, minY int
+	if e.From.X > e.To.X {
+		minX = e.To.X
+		dx = e.From.X - e.To.X
+	} else {
+		minX = e.From.X
+		dx = e.To.X - e.From.X
+	}
+
+	if e.From.Y > e.To.Y {
+		minY = e.To.Y
+		dy = e.From.Y - e.To.Y
+	} else {
+		minY = e.From.Y
+		dy = e.To.Y - e.From.Y
+	}
+	return Coords{minX + dx / 2, minY + dy / 2}
+}