New spiral staircase - to demo use of Drone.PLAYER_STAIRS_FACING

src/main/javascript/drone/spiral_stairs.js

@@ -0,0 +1,45 @@
+load(__folder + "drone.js");
+/************************************************************************
+Drone.spiral_stairs() method
+============================
+Constructs a spiral staircase with slabs at each corner.
+
+Parameters
+----------
+
+ * stairBlock - The block to use for stairs, should be one of the following...
+   - 'oak'
+   - 'spruce'
+   - 'birch'
+   - 'jungle'
+   - 'cobblestone'
+   - 'brick'
+   - 'stone'
+   - 'nether'
+   - 'sandstone'
+   - 'quartz'
+ * flights - The number of flights of stairs to build.
+
+![Spiral Staircase](img/spiralstair1.png)
+
+Example
+-------
+To construct a spiral staircase 5 floors high made of oak...
+
+    spiral_stairs('oak', 5);
+
+***/
+Drone.extend("spiral_stairs",function(stairBlock, flights){
+    this.chkpt('spiral_stairs');
+    
+    for (var i = 0; i < flights; i++){
+        this
+            .box(blocks.stairs[stairBlock] + ':' + Drone.PLAYER_STAIRS_FACING[this.dir])
+            .up().fwd()
+            .box(blocks.stairs[stairBlock] + ':' + Drone.PLAYER_STAIRS_FACING[this.dir])
+            .up().fwd()
+            .box(blocks.slab[stairBlock])
+            .turn().fwd();
+    }
+    return this.move('spiral_stairs');
+});