1 files changed, 102 insertions, 0 deletions
diff --git a/engine/src/terrain/com/jme3/terrain/noise/filter/IterativeFilter.java b/engine/src/terrain/com/jme3/terrain/noise/filter/IterativeFilter.java
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+++ b/engine/src/terrain/com/jme3/terrain/noise/filter/IterativeFilter.java
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+/**
+ * Copyright (c) 2011, Novyon Events
+ * 
+ * All rights reserved.
+ * 
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ * 
+ * - Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ * 
+ * - Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following disclaimer in the documentation
+ * and/or other materials provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+ * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
+ * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ * 
+ * @author Anthyon
+ */
+package com.jme3.terrain.noise.filter;
+
+import java.nio.FloatBuffer;
+import java.util.ArrayList;
+import java.util.List;
+
+import com.jme3.terrain.noise.Filter;
+
+public class IterativeFilter extends AbstractFilter {
+
+	private int iterations;
+
+	private List<Filter> preIterateFilters = new ArrayList<Filter>();
+	private List<Filter> postIterateFilters = new ArrayList<Filter>();
+	private Filter filter;
+
+	@Override
+	public int getMargin(int size, int margin) {
+		if (!this.isEnabled()) {
+			return margin;
+		}
+		for (Filter f : this.preIterateFilters) {
+			margin = f.getMargin(size, margin);
+		}
+		margin = this.filter.getMargin(size, margin);
+		for (Filter f : this.postIterateFilters) {
+			margin = f.getMargin(size, margin);
+		}
+		return this.iterations * margin + super.getMargin(size, margin);
+	}
+
+	public void setIterations(int iterations) {
+		this.iterations = iterations;
+	}
+
+	public int getIterations() {
+		return this.iterations;
+	}
+
+	public IterativeFilter addPostIterateFilter(Filter filter) {
+		this.postIterateFilters.add(filter);
+		return this;
+	}
+
+	public IterativeFilter addPreIterateFilter(Filter filter) {
+		this.preIterateFilters.add(filter);
+		return this;
+	}
+
+	public void setFilter(Filter filter) {
+		this.filter = filter;
+	}
+
+	@Override
+	public FloatBuffer filter(float sx, float sy, float base, FloatBuffer data, int size) {
+		if (!this.isEnabled()) {
+			return data;
+		}
+		FloatBuffer retval = data;
+
+		for (int i = 0; i < this.iterations; i++) {
+			for (Filter f : this.preIterateFilters) {
+				retval = f.doFilter(sx, sy, base, retval, size);
+			}
+			retval = this.filter.doFilter(sx, sy, base, retval, size);
+			for (Filter f : this.postIterateFilters) {
+				retval = f.doFilter(sx, sy, base, retval, size);
+			}
+		}
+
+		return retval;
+	}
+}