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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.Savable;
import com.jme3.math.Vector3f;
import com.jme3.terrain.geomipmap.TerrainPatch;
import com.jme3.terrain.geomipmap.UpdatedTerrainPatch;
import java.util.HashMap;
import java.util.List;
/**
* Calculate the Level of Detail of a terrain patch based on the
* cameras, or other locations.
*
* @author Brent Owens
*/
public interface LodCalculator extends Savable, Cloneable {
public boolean calculateLod(TerrainPatch terrainPatch, List<Vector3f> locations, HashMap<String,UpdatedTerrainPatch> updates);
public LodCalculator clone();
public void turnOffLod();
public void turnOnLod();
public boolean isLodOff();
/**
* If true, then this calculator can cause neighbouring terrain chunks to
* have LOD levels that are greater than 1 apart.
* Entropy algorithms will want to return true for this. Straight distance
* calculations will just want to return false.
*/
public boolean usesVariableLod();
}
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