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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 abstract class AbstractFilter implements Filter {
protected List<Filter> preFilters = new ArrayList<Filter>();
protected List<Filter> postFilters = new ArrayList<Filter>();
private boolean enabled = true;
@Override
public Filter addPreFilter(Filter filter) {
this.preFilters.add(filter);
return this;
}
@Override
public Filter addPostFilter(Filter filter) {
this.postFilters.add(filter);
return this;
}
@Override
public FloatBuffer doFilter(float sx, float sy, float base, FloatBuffer data, int size) {
if (!this.isEnabled()) {
return data;
}
FloatBuffer retval = data;
for (Filter f : this.preFilters) {
retval = f.doFilter(sx, sy, base, retval, size);
}
retval = this.filter(sx, sy, base, retval, size);
for (Filter f : this.postFilters) {
retval = f.doFilter(sx, sy, base, retval, size);
}
return retval;
}
public abstract FloatBuffer filter(float sx, float sy, float base, FloatBuffer buffer, int size);
@Override
public int getMargin(int size, int margin) {
// TODO sums up all the margins from filters... maybe there's a more
// efficient algorithm
if (!this.isEnabled()) {
return margin;
}
for (Filter f : this.preFilters) {
margin = f.getMargin(size, margin);
}
for (Filter f : this.postFilters) {
margin = f.getMargin(size, margin);
}
return margin;
}
@Override
public boolean isEnabled() {
return this.enabled;
}
public void setEnabled(boolean enabled) {
this.enabled = enabled;
}
}
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