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/*
* Copyright (c) 2009-2010 jMonkeyEngine
* 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.
*
* * Neither the name of 'jMonkeyEngine' nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* 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 OWNER 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.
*/
package com.jme3.terrain.geomipmap.lodcalc;
import com.jme3.export.InputCapsule;
import com.jme3.export.JmeExporter;
import com.jme3.export.JmeImporter;
import com.jme3.export.OutputCapsule;
import com.jme3.terrain.Terrain;
import com.jme3.terrain.geomipmap.TerrainQuad;
import java.io.IOException;
/**
* Just multiplies the terrain patch size by 2. So every two
* patches away the camera is, the LOD changes.
*
* Set it higher to have the LOD change less frequently.
*
* @author bowens
*/
public class SimpleLodThreshold implements LodThreshold {
private int size; // size of a terrain patch
private float lodMultiplier = 2;
public SimpleLodThreshold() {
}
public SimpleLodThreshold(Terrain terrain) {
if (terrain instanceof TerrainQuad)
this.size = ((TerrainQuad)terrain).getPatchSize();
}
public SimpleLodThreshold(int patchSize, float lodMultiplier) {
this.size = patchSize;
}
public float getLodMultiplier() {
return lodMultiplier;
}
public void setLodMultiplier(float lodMultiplier) {
this.lodMultiplier = lodMultiplier;
}
public int getSize() {
return size;
}
public void setSize(int size) {
this.size = size;
}
public float getLodDistanceThreshold() {
return size*lodMultiplier;
}
public void write(JmeExporter ex) throws IOException {
OutputCapsule oc = ex.getCapsule(this);
oc.write(size, "size", 16);
oc.write(lodMultiplier, "lodMultiplier", 2);
}
public void read(JmeImporter im) throws IOException {
InputCapsule ic = im.getCapsule(this);
size = ic.readInt("size", 16);
lodMultiplier = ic.readInt("lodMultiplier", 2);
}
@Override
public LodThreshold clone() {
SimpleLodThreshold clone = new SimpleLodThreshold();
clone.size = size;
clone.lodMultiplier = lodMultiplier;
return clone;
}
@Override
public String toString() {
return "SimpleLodThreshold "+size+", "+lodMultiplier;
}
}
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