build in layers order

src/api/java/baritone/api/Settings.java

@@ -664,6 +664,13 @@ public final class Settings {
      */
     public final Setting<Boolean> buildInLayers = new Setting<>(false);
 
+    /**
+     * false = build from bottom to top
+     * <p>
+     * true = build from top to bottom
+     */
+    public final Setting<Boolean> layerOrder = new Setting<>(false);
+
     /**
      * How far to move before repeating the build. 0 to disable repeating on a certain axis, 0,0,0 to disable entirely
      */

src/main/java/baritone/process/BuilderProcess.java

@@ -302,12 +302,28 @@ public class BuilderProcess extends BaritoneProcessHelper implements IBuilderPro
                 realSchematic = schematic;
             }
             ISchematic realSchematic = this.realSchematic; // wrap this properly, dont just have the inner class refer to the builderprocess.this
+            int minYInclusive;
+            int maxYInclusive;
+            // layer = 0 should be nothing
+            // layer = realSchematic.heightY() should be everything
+            if (Baritone.settings().layerOrder.value) { // top to bottom
+                maxYInclusive = realSchematic.heightY() - 1;
+                minYInclusive = realSchematic.heightY() - layer;
+            } else {
+                maxYInclusive = layer - 1;
+                minYInclusive = 0;
+            }
             schematic = new ISchematic() {
                 @Override
                 public IBlockState desiredState(int x, int y, int z) {
                     return realSchematic.desiredState(x, y, z);
                 }
 
+                @Override
+                public boolean inSchematic(int x, int y, int z) {
+                    return ISchematic.super.inSchematic(x, y, z) && y >= minYInclusive && y <= maxYInclusive;
+                }
+
                 @Override
                 public int widthX() {
                     return realSchematic.widthX();
@@ -315,7 +331,7 @@ public class BuilderProcess extends BaritoneProcessHelper implements IBuilderPro
 
                 @Override
                 public int heightY() {
-                    return layer;
+                    return realSchematic.heightY();
                 }
 
                 @Override