up3

server/block/cube/range.go

@@ -0,0 +1,22 @@
+package cube
+
+// Range represents the height range of a Dimension in blocks. The first value
+// of the Range holds the minimum Y value, the second value holds the maximum Y
+// value.
+type Range [2]int
+
+// Min returns the minimum Y value of a Range. It is equivalent to Range[0].
+func (r Range) Min() int {
+	return r[0]
+}
+
+// Max returns the maximum Y value of a Range. It is equivalent to Range[1].
+func (r Range) Max() int {
+	return r[1]
+}
+
+// Height returns the total height of the Range, the difference between Max and
+// Min.
+func (r Range) Height() int {
+	return r[1] - r[0]
+}