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
33package com.jme3.scene.shape;
34
35import com.jme3.export.InputCapsule;
36import com.jme3.export.JmeExporter;
37import com.jme3.export.JmeImporter;
38import com.jme3.export.OutputCapsule;
39import com.jme3.math.Vector3f;
40import com.jme3.scene.Mesh;
41import com.jme3.scene.VertexBuffer;
42import com.jme3.scene.VertexBuffer.Type;
43import java.io.IOException;
44import java.nio.FloatBuffer;
45
46/**
47 * A simple line implementation with a start and an end.
48 *
49 * @author Brent Owens
50 */
51public 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