Refactor HDMap configuration - add shaders, perspectives

src/main/java/org/dynmap/hdmap/HDPerspectiveState.java

@@ -3,6 +3,15 @@ package org.dynmap.hdmap;
 import org.dynmap.utils.Vector3D;
 
 public interface HDPerspectiveState {
+    /* Represents last step of movement of the ray */
+    public enum BlockStep {
+        X_PLUS,
+        Y_PLUS,
+        Z_PLUS,
+        X_MINUS,
+        Y_MINUS,
+        Z_MINUS
+    };
     /**
      * Get sky light level - only available if shader requested it
      */
@@ -22,7 +31,7 @@ public interface HDPerspectiveState {
     /**
      * Get direction of last block step
      */
-    HDMap.BlockStep getLastBlockStep();
+    BlockStep getLastBlockStep();
     /**
      * Get perspective scale
      */