1 /* 2 * Copyright (c) 2009-2010 jMonkeyEngine 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: 8 * 9 * * Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 12 * * Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * * Neither the name of 'jMonkeyEngine' nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 22 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 23 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 24 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 27 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 28 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 29 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 30 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33 package com.jme3.terrain.geomipmap.lodcalc; 34 35 import com.jme3.export.Savable; 36 import com.jme3.math.Vector3f; 37 import com.jme3.terrain.geomipmap.TerrainPatch; 38 import com.jme3.terrain.geomipmap.UpdatedTerrainPatch; 39 import java.util.HashMap; 40 import java.util.List; 41 42 /** 43 * Calculate the Level of Detail of a terrain patch based on the 44 * cameras, or other locations. 45 * 46 * @author Brent Owens 47 */ 48 public interface LodCalculator extends Savable, Cloneable { 49 50 public boolean calculateLod(TerrainPatch terrainPatch, List<Vector3f> locations, HashMap<String,UpdatedTerrainPatch> updates); 51 52 public LodCalculator clone(); 53 54 public void turnOffLod(); 55 public void turnOnLod(); 56 public boolean isLodOff(); 57 58 /** 59 * If true, then this calculator can cause neighbouring terrain chunks to 60 * have LOD levels that are greater than 1 apart. 61 * Entropy algorithms will want to return true for this. Straight distance 62 * calculations will just want to return false. 63 */ 64 public boolean usesVariableLod(); 65 } 66
