1 files changed, 18 insertions, 0 deletions
diff --git a/base/src/main/java/bjc/utils/esodata/DoubleSided.java b/base/src/main/java/bjc/utils/esodata/DoubleSided.java
new file mode 100644
index 0000000..83b7c77
--- /dev/null
+++ b/base/src/main/java/bjc/utils/esodata/DoubleSided.java
@@ -0,0 +1,18 @@
+package bjc.utils.esodata;
+
+public interface DoubleSided {
+	/**
+	 * Flips the object.
+	 *
+	 * The active side becomes inactive, and the inactive side becomes
+	 * active.
+	 */
+	void flip();
+
+	/**
+	 * Check which side of the object is active;
+	 *
+	 * @return True if the front side is active, false otherwise.
+	 */
+	boolean currentSide();
+}