Change /schematic save to bake in the transform.

src/main/java/com/sk89q/worldedit/command/FlattenedClipboardTransform.java

@@ -0,0 +1,143 @@
+/*
+ * WorldEdit, a Minecraft world manipulation toolkit
+ * Copyright (C) sk89q <http://www.sk89q.com>
+ * Copyright (C) WorldEdit team and contributors
+ *
+ * This program 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.
+ *
+ * This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.command;
+
+import com.sk89q.worldedit.Vector;
+import com.sk89q.worldedit.extent.Extent;
+import com.sk89q.worldedit.extent.clipboard.Clipboard;
+import com.sk89q.worldedit.extent.transform.BlockTransformExtent;
+import com.sk89q.worldedit.function.operation.ForwardExtentCopy;
+import com.sk89q.worldedit.function.operation.Operation;
+import com.sk89q.worldedit.math.transform.AffineTransform;
+import com.sk89q.worldedit.math.transform.CombinedTransform;
+import com.sk89q.worldedit.math.transform.Transform;
+import com.sk89q.worldedit.regions.CuboidRegion;
+import com.sk89q.worldedit.regions.Region;
+import com.sk89q.worldedit.world.registry.WorldData;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * Helper class to 'bake' a transform into a clipboard.
+ *
+ * <p>This class needs a better name and may need to be made more generic.</p>
+ *
+ * @see Clipboard
+ * @see Transform
+ */
+class FlattenedClipboardTransform {
+
+    private final Clipboard original;
+    private final Transform transform;
+    private final WorldData worldData;
+
+    /**
+     * Create a new instance.
+     *
+     * @param original the original clipboard
+     * @param transform the transform
+     * @param worldData the world data instance
+     */
+    private FlattenedClipboardTransform(Clipboard original, Transform transform, WorldData worldData) {
+        checkNotNull(original);
+        checkNotNull(transform);
+        checkNotNull(worldData);
+        this.original = original;
+        this.transform = transform;
+        this.worldData = worldData;
+    }
+
+    /**
+     * Get the transformed region.
+     *
+     * @return the transformed region
+     */
+    public Region getTransformedRegion() {
+        Region region = original.getRegion();
+        Vector minimum = region.getMinimumPoint();
+        Vector maximum = region.getMaximumPoint();
+
+        Transform transformAround =
+                new CombinedTransform(
+                        new AffineTransform().translate(original.getOrigin().multiply(-1)),
+                        transform,
+                        new AffineTransform().translate(original.getOrigin()));
+
+        Vector[] corners = new Vector[] {
+                minimum,
+                maximum,
+                minimum.setX(maximum.getX()),
+                minimum.setY(maximum.getY()),
+                minimum.setZ(maximum.getZ()),
+                maximum.setX(minimum.getX()),
+                maximum.setY(minimum.getY()),
+                maximum.setZ(minimum.getZ()) };
+
+        for (int i = 0; i < corners.length; i++) {
+            corners[i] = transformAround.apply(corners[i]);
+        }
+
+        Vector newMinimum = corners[0];
+        Vector newMaximum = corners[0];
+
+        for (int i = 1; i < corners.length; i++) {
+            newMinimum = Vector.getMinimum(newMinimum, corners[i]);
+            newMaximum = Vector.getMaximum(newMaximum, corners[i]);
+        }
+
+        // After transformation, the points may not really sit on a block,
+        // so we should expand the region for edge cases
+        newMinimum = newMinimum.setX(Math.floor(newMinimum.getX()));
+        newMinimum = newMinimum.setY(Math.floor(newMinimum.getY()));
+        newMinimum = newMinimum.setZ(Math.floor(newMinimum.getZ()));
+
+        newMaximum = newMaximum.setX(Math.ceil(newMaximum.getX()));
+        newMaximum = newMaximum.setY(Math.ceil(newMaximum.getY()));
+        newMaximum = newMaximum.setZ(Math.ceil(newMaximum.getZ()));
+
+        return new CuboidRegion(newMinimum, newMaximum);
+    }
+
+    /**
+     * Create an operation to copy from the original clipboard to the given extent.
+     *
+     * @param target the target
+     * @return the operation
+     */
+    public Operation copyTo(Extent target) {
+        BlockTransformExtent extent = new BlockTransformExtent(original, transform, worldData.getBlockRegistry());
+        ForwardExtentCopy copy = new ForwardExtentCopy(extent, original.getRegion(), original.getOrigin(), target, original.getOrigin());
+        copy.setTransform(transform);
+        return copy;
+    }
+
+    /**
+     * Create a new instance to bake the transform with.
+     *
+     * @param original the original clipboard
+     * @param transform the transform
+     * @param worldData the world data instance
+     * @return a builder
+     */
+    public static FlattenedClipboardTransform transform(Clipboard original, Transform transform, WorldData worldData) {
+        return new FlattenedClipboardTransform(original, transform, worldData);
+    }
+
+}

src/main/java/com/sk89q/worldedit/command/SchematicCommands.java

@@ -35,7 +35,6 @@ import com.sk89q.worldedit.entity.Player;
 import com.sk89q.worldedit.extension.platform.Actor;
 import com.sk89q.worldedit.extent.clipboard.BlockArrayClipboard;
 import com.sk89q.worldedit.extent.clipboard.Clipboard;
-import com.sk89q.worldedit.extent.clipboard.CuboidClipboardTransform;
 import com.sk89q.worldedit.extent.clipboard.io.ClipboardFormat;
 import com.sk89q.worldedit.extent.clipboard.io.ClipboardReader;
 import com.sk89q.worldedit.extent.clipboard.io.ClipboardWriter;
@@ -159,11 +158,11 @@ public class SchematicCommands {
         Transform transform = holder.getTransform();
         Clipboard target;
 
-        // If we have a transform, we have to make a copy so we can save
-        // this transformed copy
+        // If we have a transform, bake it into the copy
         if (!transform.isIdentity()) {
-            CuboidClipboardTransform result = CuboidClipboardTransform.transform(clipboard, transform, holder.getWorldData());
+            FlattenedClipboardTransform result = FlattenedClipboardTransform.transform(clipboard, transform, holder.getWorldData());
             target = new BlockArrayClipboard(result.getTransformedRegion());
+            target.setOrigin(clipboard.getOrigin());
             Operations.completeLegacy(result.copyTo(target));
         } else {
             target = clipboard;