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      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 // $Id: Box.java 4131 2009-03-19 20:15:28Z blaine.dev $
     34 package com.jme3.scene.shape;
     35 
     36 import com.jme3.math.Vector3f;
     37 import com.jme3.scene.VertexBuffer.Type;
     38 import com.jme3.util.BufferUtils;
     39 import java.nio.FloatBuffer;
     40 
     41 /**
     42  * A box with solid (filled) faces.
     43  *
     44  * @author Mark Powell
     45  * @version $Revision: 4131 $, $Date: 2009-03-19 16:15:28 -0400 (Thu, 19 Mar 2009) $
     46  */
     47 public class StripBox extends AbstractBox {
     48 
     49     private static final short[] GEOMETRY_INDICES_DATA =
     50     { 1, 0, 4,
     51       5,
     52       7,
     53       0,
     54       3,
     55       1,
     56       2,
     57       4,
     58       6,
     59       7,
     60       2,
     61       3 };
     62 
     63     private static final float[] GEOMETRY_TEXTURE_DATA = {
     64         1, 0,
     65         0, 0,
     66         0, 1,
     67         1, 1,
     68 
     69         1, 0,
     70         0, 0,
     71         1, 1,
     72         0, 1
     73     };
     74 
     75     /**
     76      * Creates a new box.
     77      * <p>
     78      * The box has a center of 0,0,0 and extends in the out from the center by
     79      * the given amount in <em>each</em> direction. So, for example, a box
     80      * with extent of 0.5 would be the unit cube.
     81      *
     82      * @param x the size of the box along the x axis, in both directions.
     83      * @param y the size of the box along the y axis, in both directions.
     84      * @param z the size of the box along the z axis, in both directions.
     85      */
     86     public StripBox(float x, float y, float z) {
     87         super();
     88         updateGeometry(Vector3f.ZERO, x, y, z);
     89     }
     90 
     91     /**
     92      * Creates a new box.
     93      * <p>
     94      * The box has the given center and extends in the out from the center by
     95      * the given amount in <em>each</em> direction. So, for example, a box
     96      * with extent of 0.5 would be the unit cube.
     97      *
     98      * @param center the center of the box.
     99      * @param x the size of the box along the x axis, in both directions.
    100      * @param y the size of the box along the y axis, in both directions.
    101      * @param z the size of the box along the z axis, in both directions.
    102      */
    103     public StripBox(Vector3f center, float x, float y, float z) {
    104         super();
    105         updateGeometry(center, x, y, z);
    106     }
    107 
    108     /**
    109      * Constructor instantiates a new <code>Box</code> object.
    110      * <p>
    111      * The minimum and maximum point are provided, these two points define the
    112      * shape and size of the box but not its orientation or position. You should
    113      * use the {@link #setLocalTranslation()} and {@link #setLocalRotation()}
    114      * methods to define those properties.
    115      *
    116      * @param min the minimum point that defines the box.
    117      * @param max the maximum point that defines the box.
    118      */
    119     public StripBox(Vector3f min, Vector3f max) {
    120         super();
    121         updateGeometry(min, max);
    122     }
    123 
    124     /**
    125      * Empty constructor for serialization only. Do not use.
    126      */
    127     public StripBox(){
    128         super();
    129     }
    130 
    131     /**
    132      * Creates a clone of this box.
    133      * <p>
    134      * The cloned box will have _clone appended to its name, but all other
    135      * properties will be the same as this box.
    136      */
    137     @Override
    138     public StripBox clone() {
    139         return new StripBox(center.clone(), xExtent, yExtent, zExtent);
    140     }
    141 
    142     protected void duUpdateGeometryIndices() {
    143         if (getBuffer(Type.Index) == null){
    144             setBuffer(Type.Index, 3, BufferUtils.createShortBuffer(GEOMETRY_INDICES_DATA));
    145         }
    146     }
    147 
    148     protected void duUpdateGeometryNormals() {
    149         if (getBuffer(Type.Normal) == null){
    150             float[] normals = new float[8 * 3];
    151 
    152             Vector3f[] vert = computeVertices();
    153             Vector3f norm = new Vector3f();
    154 
    155             for (int i = 0; i < 8; i++) {
    156                 norm.set(vert[i]).normalizeLocal();
    157 
    158                 normals[i * 3 + 0] = norm.x;
    159                 normals[i * 3 + 1] = norm.x;
    160                 normals[i * 3 + 2] = norm.x;
    161             }
    162 
    163             setBuffer(Type.Normal, 3, BufferUtils.createFloatBuffer(normals));
    164         }
    165     }
    166 
    167     protected void duUpdateGeometryTextures() {
    168         if (getBuffer(Type.TexCoord) == null){
    169             setBuffer(Type.TexCoord, 2, BufferUtils.createFloatBuffer(GEOMETRY_TEXTURE_DATA));
    170         }
    171     }
    172 
    173     protected void duUpdateGeometryVertices() {
    174         FloatBuffer fpb = BufferUtils.createVector3Buffer(8 * 3);
    175         Vector3f[] v = computeVertices();
    176         fpb.put(new float[] {
    177                 v[0].x, v[0].y, v[0].z,
    178                 v[1].x, v[1].y, v[1].z,
    179                 v[2].x, v[2].y, v[2].z,
    180                 v[3].x, v[3].y, v[3].z,
    181                 v[4].x, v[4].y, v[4].z,
    182                 v[5].x, v[5].y, v[5].z,
    183                 v[6].x, v[6].y, v[6].z,
    184                 v[7].x, v[7].y, v[7].z,
    185         });
    186         setBuffer(Type.Position, 3, fpb);
    187         setMode(Mode.TriangleStrip);
    188         updateBound();
    189     }
    190 
    191 }