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.renderer.queue; 34 35 import com.jme3.material.Material; 36 import com.jme3.math.Vector3f; 37 import com.jme3.renderer.Camera; 38 import com.jme3.scene.Geometry; 39 40 public class OpaqueComparator implements GeometryComparator { 41 42 private Camera cam; 43 private final Vector3f tempVec = new Vector3f(); 44 private final Vector3f tempVec2 = new Vector3f(); 45 setCamera(Camera cam)46 public void setCamera(Camera cam){ 47 this.cam = cam; 48 } 49 distanceToCam(Geometry spat)50 public float distanceToCam(Geometry spat){ 51 if (spat == null) 52 return Float.NEGATIVE_INFINITY; 53 54 if (spat.queueDistance != Float.NEGATIVE_INFINITY) 55 return spat.queueDistance; 56 57 Vector3f camPosition = cam.getLocation(); 58 Vector3f viewVector = cam.getDirection(tempVec2); 59 Vector3f spatPosition = null; 60 61 if (spat.getWorldBound() != null){ 62 spatPosition = spat.getWorldBound().getCenter(); 63 }else{ 64 spatPosition = spat.getWorldTranslation(); 65 } 66 67 spatPosition.subtract(camPosition, tempVec); 68 spat.queueDistance = tempVec.dot(viewVector); 69 70 return spat.queueDistance; 71 } 72 compare(Geometry o1, Geometry o2)73 public int compare(Geometry o1, Geometry o2) { 74 Material m1 = o1.getMaterial(); 75 Material m2 = o2.getMaterial(); 76 77 int sortId = m1.compareTo(m2); 78 79 if (sortId == 0){ 80 // use the same shader. 81 // sort front-to-back then. 82 float d1 = distanceToCam(o1); 83 float d2 = distanceToCam(o2); 84 85 if (d1 == d2) 86 return 0; 87 else if (d1 < d2) 88 return -1; 89 else 90 return 1; 91 }else{ 92 return sortId; 93 } 94 } 95 96 } 97