✨ Setting to mirror schematics

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

@@ -29,6 +29,7 @@
 import net.minecraft.world.item.Item;
 import net.minecraft.world.level.block.Block;
 import net.minecraft.world.level.block.Blocks;
+import net.minecraft.world.level.block.Mirror;
 import net.minecraft.world.level.block.Rotation;
 
 import org.slf4j.Logger;
@@ -1103,6 +1104,16 @@ public final class Settings {
      */
     public final Setting<Rotation> buildSchematicRotation = new Setting<>(Rotation.NONE);
 
+    /**
+     * Mirrors the schematic before building it.
+     * Possible values are
+     * <ul>
+     *  <li> FRONT_BACK - mirror the schematic along its local x axis </li>
+     *  <li> LEFT_RIGHT - mirror the schematic along its local z axis </li>
+     * </ul>
+     */
+    public final Setting<Mirror> buildSchematicMirror = new Setting<>(Mirror.NONE);
+
     /**
      * The fallback used by the build command when no extension is specified. This may be useful if schematics of a
      * particular format are used often, and the user does not wish to have to specify the extension with every usage.

src/api/java/baritone/api/schematic/MirroredSchematic.java

@@ -0,0 +1,114 @@
+/*
+ * This file is part of Baritone.
+ *
+ * Baritone is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Baritone is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with Baritone.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package baritone.api.schematic;
+
+import net.minecraft.world.level.block.state.BlockState;
+import net.minecraft.world.level.block.Mirror;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class MirroredSchematic implements ISchematic {
+
+    private final ISchematic schematic;
+    private final Mirror mirror;
+
+    public MirroredSchematic(ISchematic schematic, Mirror mirror) {
+        this.schematic = schematic;
+        this.mirror = mirror;
+    }
+
+    @Override
+    public boolean inSchematic(int x, int y, int z, BlockState currentState) {
+        return schematic.inSchematic(
+                mirrorX(x, widthX(), mirror),
+                y,
+                mirrorZ(z, lengthZ(), mirror),
+                mirror(currentState, mirror)
+        );
+    }
+
+    @Override
+    public BlockState desiredState(int x, int y, int z, BlockState current, List<BlockState> approxPlaceable) {
+        return mirror(schematic.desiredState(
+                mirrorX(x, widthX(), mirror),
+                y,
+                mirrorZ(z, lengthZ(), mirror),
+                mirror(current, mirror),
+                mirror(approxPlaceable, mirror)
+        ), mirror);
+    }
+
+    @Override
+    public void reset() {
+        schematic.reset();
+    }
+
+    @Override
+    public int widthX() {
+        return schematic.widthX();
+    }
+
+    @Override
+    public int heightY() {
+        return schematic.heightY();
+    }
+
+    @Override
+    public int lengthZ() {
+        return schematic.lengthZ();
+    }
+
+    private static int mirrorX(int x, int sizeX, Mirror mirror) {
+        switch (mirror) {
+            case NONE:
+            case LEFT_RIGHT:
+                return x;
+            case FRONT_BACK:
+                return sizeX - x - 1;
+        }
+        throw new IllegalArgumentException("Unknown mirror");
+    }
+
+    private static int mirrorZ(int z, int sizeZ, Mirror mirror) {
+        switch (mirror) {
+            case NONE:
+            case FRONT_BACK:
+                return z;
+            case LEFT_RIGHT:
+                return sizeZ - z - 1;
+        }
+        throw new IllegalArgumentException("Unknown mirror");
+    }
+
+    private static BlockState mirror(BlockState state, Mirror mirror) {
+        if (state == null) {
+            return null;
+        }
+        return state.mirror(mirror);
+    }
+
+    private static List<BlockState> mirror(List<BlockState> states, Mirror mirror) {
+        if (states == null) {
+            return null;
+        }
+        return states.stream()
+                .map(s -> mirror(s, mirror))
+                .collect(Collectors.toList());
+    }
+}

src/api/java/baritone/api/utils/SettingsUtil.java

@@ -27,6 +27,7 @@
 import net.minecraft.resources.ResourceLocation;
 import net.minecraft.world.item.Item;
 import net.minecraft.world.level.block.Block;
+import net.minecraft.world.level.block.Mirror;
 import net.minecraft.world.level.block.Rotation;
 
 import java.awt.*;
@@ -222,6 +223,7 @@ private enum Parser implements ISettingParser {
         FLOAT(Float.class, Float::parseFloat),
         LONG(Long.class, Long::parseLong),
         STRING(String.class, String::new),
+        MIRROR(Mirror.class, Mirror::valueOf, Mirror::name),
         ROTATION(Rotation.class, Rotation::valueOf, Rotation::name),
         COLOR(
                 Color.class,

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

@@ -31,6 +31,7 @@
 import baritone.api.schematic.MaskSchematic;
 import baritone.api.schematic.SubstituteSchematic;
 import baritone.api.schematic.RotatedSchematic;
+import baritone.api.schematic.MirroredSchematic;
 import baritone.api.schematic.format.ISchematicFormat;
 import baritone.api.utils.*;
 import baritone.api.utils.input.Input;
@@ -120,6 +121,9 @@ public void build(String name, ISchematic schematic, Vec3i origin) {
         if (!Baritone.settings().buildSubstitutes.value.isEmpty()) {
             this.schematic = new SubstituteSchematic(this.schematic, Baritone.settings().buildSubstitutes.value);
         }
+        if (Baritone.settings().buildSchematicMirror.value != net.minecraft.world.level.block.Mirror.NONE) {
+            this.schematic = new MirroredSchematic(this.schematic, Baritone.settings().buildSchematicMirror.value);
+        }
         if (Baritone.settings().buildSchematicRotation.value != net.minecraft.world.level.block.Rotation.NONE) {
             this.schematic = new RotatedSchematic(this.schematic, Baritone.settings().buildSchematicRotation.value);
         }