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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 package com.jme3.scene.shape;
     34 
     35 import com.jme3.export.InputCapsule;
     36 import com.jme3.export.JmeExporter;
     37 import com.jme3.export.JmeImporter;
     38 import com.jme3.export.OutputCapsule;
     39 import com.jme3.math.Vector3f;
     40 import com.jme3.scene.Mesh;
     41 import com.jme3.scene.VertexBuffer;
     42 import com.jme3.scene.VertexBuffer.Type;
     43 import java.io.IOException;
     44 import java.nio.FloatBuffer;
     45 
     46 /**
     47  * A simple line implementation with a start and an end.
     48  *
     49  * @author Brent Owens
     50  */
     51 public class Line extends Mesh {
     52 
     53     private Vector3f start;
     54     private Vector3f end;
     55 
     56     public Line() {
     57     }
     58 
     59     public Line(Vector3f start, Vector3f end) {
     60         setMode(Mode.Lines);
     61         updateGeometry(start, end);
     62     }
     63 
     64     protected void updateGeometry(Vector3f start, Vector3f end) {
     65         this.start = start;
     66         this.end = end;
     67         setBuffer(Type.Position, 3, new float[]{start.x,    start.y,    start.z,
     68                                                 end.x,      end.y,      end.z,});
     69 
     70 
     71         setBuffer(Type.TexCoord, 2, new float[]{0, 0,
     72                                                 1, 1});
     73 
     74         setBuffer(Type.Normal, 3, new float[]{0, 0, 1,
     75                                               0, 0, 1});
     76 
     77         setBuffer(Type.Index, 3, new short[]{0, 1});
     78 
     79         updateBound();
     80     }
     81 
     82     /**
     83      * Update the start and end points of the line.
     84      */
     85     public void updatePoints(Vector3f start, Vector3f end) {
     86         VertexBuffer posBuf = getBuffer(Type.Position);
     87 
     88         FloatBuffer fb = (FloatBuffer) posBuf.getData();
     89 
     90         fb.put(start.x).put(start.y).put(start.z);
     91         fb.put(end.x).put(end.y).put(end.z);
     92 
     93         posBuf.updateData(fb);
     94 
     95         updateBound();
     96     }
     97 
     98     public Vector3f getEnd() {
     99         return end;
    100     }
    101 
    102     public Vector3f getStart() {
    103         return start;
    104     }
    105 
    106     @Override
    107     public void write(JmeExporter ex) throws IOException {
    108         super.write(ex);
    109         OutputCapsule out = ex.getCapsule(this);
    110 
    111         out.write(start, "startVertex", null);
    112         out.write(end, "endVertex", null);
    113     }
    114 
    115     @Override
    116     public void read(JmeImporter im) throws IOException {
    117         super.read(im);
    118         InputCapsule in = im.getCapsule(this);
    119 
    120         start = (Vector3f) in.readSavable("startVertex", null);
    121         end = (Vector3f) in.readSavable("endVertex", null);
    122     }
    123 }
    124