Add some experimental brush commands.

/br set <shape> <radius> <pattern>
/br deform <shape> <expression>
/br scatter <shape> <density> <generator>
/br apply <shape> <generator>

<shape> can be: cuboid, cyl[inder], sphere

<density> is 0-100

<generator> can be:
forest|tree <type>
item <item>[:<data>] (ONLY WORKS ON FORGE)

Examples:

/br deform cuboid 5 y-=0.2
/br scatter sphere 5 100 minecraft:dye:15

worldedit-core/src/main/java/com/sk89q/worldedit/regions/factory/CuboidRegionFactory.java

@@ -0,0 +1,33 @@
+/*
+ * 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.regions.factory;
+
+import com.sk89q.worldedit.Vector;
+import com.sk89q.worldedit.regions.CuboidRegion;
+import com.sk89q.worldedit.regions.Region;
+
+public class CuboidRegionFactory implements RegionFactory {
+
+    @Override
+    public Region createCenteredAt(Vector position, double size) {
+        return CuboidRegion.fromCenter(position, (int) size);
+    }
+
+}

worldedit-core/src/main/java/com/sk89q/worldedit/regions/factory/CylinderRegionFactory.java

@@ -0,0 +1,40 @@
+/*
+ * 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.regions.factory;
+
+import com.sk89q.worldedit.Vector;
+import com.sk89q.worldedit.Vector2D;
+import com.sk89q.worldedit.regions.CylinderRegion;
+import com.sk89q.worldedit.regions.Region;
+
+public class CylinderRegionFactory implements RegionFactory {
+
+    private final double height;
+
+    public CylinderRegionFactory(double height) {
+        this.height = height;
+    }
+
+    @Override
+    public Region createCenteredAt(Vector position, double size) {
+        return new CylinderRegion(position, new Vector2D(size, size), position.getBlockY() - (int) (height / 2), position.getBlockY() + (int) (height / 2));
+    }
+
+}

worldedit-core/src/main/java/com/sk89q/worldedit/regions/factory/RegionFactory.java

@@ -0,0 +1,29 @@
+/*
+ * 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.regions.factory;
+
+import com.sk89q.worldedit.Vector;
+import com.sk89q.worldedit.regions.Region;
+
+public interface RegionFactory {
+
+    Region createCenteredAt(Vector position, double size);
+
+}

worldedit-core/src/main/java/com/sk89q/worldedit/regions/factory/SphereRegionFactory.java

@@ -0,0 +1,33 @@
+/*
+ * 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.regions.factory;
+
+import com.sk89q.worldedit.Vector;
+import com.sk89q.worldedit.regions.EllipsoidRegion;
+import com.sk89q.worldedit.regions.Region;
+
+public class SphereRegionFactory implements RegionFactory {
+
+    @Override
+    public Region createCenteredAt(Vector position, double size) {
+        return new EllipsoidRegion(position, new Vector(size, size, size));
+    }
+
+}