DirectionUtils.

src/mantle/world/DirectionUtils.java

@@ -0,0 +1,19 @@
+package mantle.world;
+
+import net.minecraftforge.common.ForgeDirection;
+
+/**
+ * Helper functions for dealing with ForgeDirection
+ *
+ * @author Sunstrike <sun@sunstrike.io>
+ */
+public class DirectionUtils {
+
+    private DirectionUtils() {} // All static
+
+    public static boolean isRightAngles(ForgeDirection a, ForgeDirection b)
+    {
+        return a != b && a != b.getOpposite() && a != ForgeDirection.UNKNOWN && b != ForgeDirection.UNKNOWN;
+    }
+
+}