Added NoiseFilter and NoiseFilter2D masks.

src/main/java/com/sk89q/worldedit/masks/NoiseFilter.java

@@ -0,0 +1,93 @@
+/*
+ * 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 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.masks;
+
+import com.sk89q.worldedit.EditSession;
+import com.sk89q.worldedit.Vector;
+import com.sk89q.worldedit.util.noise.NoiseGenerator;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * A mask that uses a noise generator and returns true whenever the noise
+ * generator returns a value above the given density.
+ */
+public class NoiseFilter extends AbstractMask {
+
+    private NoiseGenerator noiseGenerator;
+    private double density;
+
+    /**
+     * Create a new noise filter.
+     *
+     * @param noiseGenerator the noise generator
+     * @param density the density
+     */
+    public NoiseFilter(NoiseGenerator noiseGenerator, double density) {
+        setNoiseGenerator(noiseGenerator);
+        setDensity(density);
+    }
+
+    /**
+     * Get the noise generator.
+     *
+     * @return the noise generator
+     */
+    public NoiseGenerator getNoiseGenerator() {
+        return noiseGenerator;
+    }
+
+    /**
+     * Set the noise generator.
+     *
+     * @param noiseGenerator a noise generator
+     */
+    public void setNoiseGenerator(NoiseGenerator noiseGenerator) {
+        checkNotNull(noiseGenerator);
+        this.noiseGenerator = noiseGenerator;
+    }
+
+    /**
+     * Get the probability of passing as a number between 0 and 1 (inclusive).
+     *
+     * @return the density
+     */
+    public double getDensity() {
+        return density;
+    }
+
+    /**
+     * Set the probability of passing as a number between 0 and 1 (inclusive).
+     *
+     * @return the density
+     */
+    public void setDensity(double density) {
+        checkArgument(density >= 0, "density must be >= 0");
+        checkArgument(density <= 1, "density must be >= 1");
+        this.density = density;
+    }
+
+    @Override
+    public boolean matches(EditSession editSession, Vector pos) {
+        return noiseGenerator.noise(pos) <= density;
+    }
+
+}

src/main/java/com/sk89q/worldedit/masks/NoiseFilter2D.java

@@ -0,0 +1,93 @@
+/*
+ * 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 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+package com.sk89q.worldedit.masks;
+
+import com.sk89q.worldedit.EditSession;
+import com.sk89q.worldedit.Vector2D;
+import com.sk89q.worldedit.util.noise.NoiseGenerator;
+
+import static com.google.common.base.Preconditions.checkArgument;
+import static com.google.common.base.Preconditions.checkNotNull;
+
+/**
+ * A mask that uses a noise generator and returns true whenever the noise
+ * generator returns a value above the given density.
+ */
+public class NoiseFilter2D extends AbstractMask2D {
+
+    private NoiseGenerator noiseGenerator;
+    private double density;
+
+    /**
+     * Create a new noise filter.
+     *
+     * @param noiseGenerator the noise generator
+     * @param density the density
+     */
+    public NoiseFilter2D(NoiseGenerator noiseGenerator, double density) {
+        setNoiseGenerator(noiseGenerator);
+        setDensity(density);
+    }
+
+    /**
+     * Get the noise generator.
+     *
+     * @return the noise generator
+     */
+    public NoiseGenerator getNoiseGenerator() {
+        return noiseGenerator;
+    }
+
+    /**
+     * Set the noise generator.
+     *
+     * @param noiseGenerator a noise generator
+     */
+    public void setNoiseGenerator(NoiseGenerator noiseGenerator) {
+        checkNotNull(noiseGenerator);
+        this.noiseGenerator = noiseGenerator;
+    }
+
+    /**
+     * Get the probability of passing as a number between 0 and 1 (inclusive).
+     *
+     * @return the density
+     */
+    public double getDensity() {
+        return density;
+    }
+
+    /**
+     * Set the probability of passing as a number between 0 and 1 (inclusive).
+     *
+     * @return the density
+     */
+    public void setDensity(double density) {
+        checkArgument(density >= 0, "density must be >= 0");
+        checkArgument(density <= 1, "density must be >= 1");
+        this.density = density;
+    }
+
+    @Override
+    public boolean matches(EditSession editSession, Vector2D pos) {
+        return noiseGenerator.noise(pos) <= density;
+    }
+
+}

src/main/java/com/sk89q/worldedit/util/noise/NoiseGenerator.java

@@ -17,7 +17,7 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-package com.sk89q.worldedit.noise;
+package com.sk89q.worldedit.util.noise;
 
 import com.sk89q.worldedit.Vector;
 import com.sk89q.worldedit.Vector2D;

src/main/java/com/sk89q/worldedit/util/noise/RandomNoise.java

@@ -17,7 +17,7 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-package com.sk89q.worldedit.noise;
+package com.sk89q.worldedit.util.noise;
 
 import com.sk89q.worldedit.Vector;
 import com.sk89q.worldedit.Vector2D;