More accurate comments

Author: TomyLobo

worldedit-core/src/main/java/com/sk89q/worldedit/EditSession.java

@@ -2481,12 +2481,13 @@ public int deformRegion(final Region region, final Vector3 zero, final Vector3 u
             final Vector3 targetPosition = targetBlockPosition.toVector3();
             environment.setCurrentBlock(targetPosition);
 
-            // offset, scale
+            // transform from target coordinates
             final Vector3 scaled = targetPosition.subtract(zero).divide(unit);
 
-            // transform
+            // deform
             expression.evaluate(new double[]{ scaled.x(), scaled.y(), scaled.z() }, timeout);
 
+            // transform to source coordinates, round-nearest
             final BlockVector3 sourcePosition = environment.toWorld(x.value(), y.value(), z.value());
 
             // read block from world

worldedit-core/src/main/java/com/sk89q/worldedit/regions/shape/WorldEditExpressionEnvironment.java

@@ -39,7 +39,6 @@ public WorldEditExpressionEnvironment(Extent extent, Vector3 unit, Vector3 zero)
     }
 
     public BlockVector3 toWorld(double x, double y, double z) {
-        // unscale, unoffset, round-nearest
         return Vector3.at(x, y, z).multiply(unit).add(zero2).toBlockPoint();
     }