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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;
}
}
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