<this email is out of the list>
This is a Horrible demo I modifie.
Each polygon must have its own set of independent
coordinates (vertex), but the source I have doesnot
take care about it.
So the shared vertex coordinates currupts some
textured faces.
Alessandro
import com.sun.j3d.utils.universe.*;
import com.sun.j3d.utils.geometry.*;
import javax.media.j3d.BranchGroup;
import com.sun.j3d.utils.applet.MainFrame;
import javax.media.j3d.*;
import java.awt.*;
import javax.vecmath.*;
import java.awt.BorderLayout;
import javax.media.j3d.GeometryArray;
import java.applet.Applet;
import com.sun.j3d.utils.behaviors.vp.*;
import com.sun.j3d.utils.behaviors.keyboard.*;
import com.sun.j3d.utils.geometry.GeometryInfo;
import com.sun.j3d.utils.image.TextureLoader;
public class ThePolyhedron extends Applet
{
static java.net.URL texImageURL = null;
BoundingSphere bounds = new BoundingSphere(new
Point3d(0.0, 0.0,0.0), 100.0);
public ThePolyhedron()
{}
public void init()
{
/*
# dodecahedron
g dodecahedron
# 20 verticies
v 0.436339 0.31701884 0.7060113
v -0.16666667 0.51294726 0.7060113
v -0.53934467 0.0 0.7060113
v -0.16666667 -0.51294726 0.7060113
v 0.436339 -0.31701884 0.7060113
v 0.7060113 0.51294726 0.16666667
v 0.26967233 0.82996607 -0.16666667
v -0.26967233 0.82996607 0.16666667
v -0.7060113 0.51294726 -0.16666667
v -0.872678 0.0 0.16666667
v -0.7060113 -0.51294726 -0.16666667
v -0.26967233 -0.82996607 0.16666667
v 0.26967233 -0.82996607 -0.16666667
v 0.7060113 -0.51294726 0.16666667
v 0.872678 0.0 -0.16666667
v 0.16666667 0.51294726 -0.7060113
v -0.436339 0.31701884 -0.7060113
v -0.436339 -0.31701884 -0.7060113
v 0.16666667 -0.51294726 -0.7060113
v 0.53934467 0.0 -0.7060113
# 12 faces
f 1 2 3 4 5
f 1 6 7 8 2
f 2 8 9 10 3
f 3 10 11 12 4
f 4 12 13 14 5
f 5 14 15 6 1
f 20 19 18 17 16
f 20 15 14 13 19
f 19 13 12 11 18
f 18 11 10 9 17
f 17 9 8 7 16
f 16 7 6 15 20
*/
Point3f[] pts=new Point3f[20];
try
{
}catch(Exception ex)
{
ex.printStackTrace();
}
pts[0]= new Point3f( 0.436339f, 0.31701884f,
0.7060113f);
pts[1]= new Point3f( -0.16666667f, 0.51294726f,
0.7060113f);
pts[2]= new Point3f( -0.53934467f, 0.0f,
0.7060113f);
pts[3]= new Point3f( -0.16666667f, -0.51294726f,
0.7060113f);
pts[4]= new Point3f( 0.436339f, -0.31701884f,
0.7060113f);
pts[5]= new Point3f( 0.7060113f, 0.51294726f,
0.16666667f);
pts[6]= new Point3f( 0.26967233f, 0.82996607f,
-0.16666667f);
pts[7]= new Point3f( -0.26967233f, 0.82996607f,
0.16666667f);
pts[8]= new Point3f( -0.7060113f, 0.51294726f,
-0.16666667f);
pts[9]= new Point3f( -0.872678f, 0.0f,
0.16666667f);
pts[10]= new Point3f( -0.7060113f, -0.51294726f,
-0.16666667f);
pts[11]= new Point3f( -0.26967233f, -0.82996607f,
0.16666667f);
pts[12]= new Point3f( 0.26967233f, -0.82996607f,
-0.16666667f);
pts[13]= new Point3f( 0.7060113f, -0.51294726f,
0.16666667f);
pts[14]= new Point3f( 0.872678f, 0.0f,
-0.16666667f);
pts[15]= new Point3f( 0.16666667f, 0.51294726f,
-0.7060113f);
pts[16]= new Point3f( -0.436339f, 0.31701884f,
-0.7060113f);
pts[17]= new Point3f( -0.436339f, -0.31701884f,
-0.7060113f);
pts[18]= new Point3f( 0.16666667f, -0.51294726f,
-0.7060113f);
pts[19]= new Point3f( 0.53934467f, 0.0f,
-0.7060113f);
// the faces
int[] indices={0, 1, 2, 3, 4, //face 1
0, 5, 6, 7, 1, // face 2
1, 7, 8,9, 2, // face 3
2,9,10,11, 3,
3,11,12,13, 4,
4,13,14, 5, 0,
19,18,17,16,15,
19,14,13,12,18,
18,12,11,10,17,
17,10,9,8,16,
16,8,7,6,15,
15,6,5,14,19
};
// the number of vertices of each face
int[] stripCounts={5,5,5,5,5,5,5,5,5,5,5,5,};
// a tuple2f for each vertex
// for a complete texturing there actually 5*12
TexCoord2f to assigned ..
// but this use a economic this is just a exemple
TexCoord2f[] texcoords1 = new TexCoord2f[20];
texcoords1[0] = new TexCoord2f(0.50f,0.10f);
texcoords1[1] = new TexCoord2f(0.75f,0.35f);
texcoords1[2] = new TexCoord2f(0.65f,0.75f);
texcoords1[3] = new TexCoord2f(0.35f,0.75f);
texcoords1[4] = new TexCoord2f(0.25f,0.35f);
texcoords1[5] = new TexCoord2f(0.50f,0.10f);
texcoords1[6] = new TexCoord2f(0.75f,0.35f);
texcoords1[7] = new TexCoord2f(0.65f,0.75f);
texcoords1[8] = new TexCoord2f(0.35f,0.75f);
texcoords1[9] = new TexCoord2f(0.25f,0.35f);
texcoords1[10] = new TexCoord2f(0.50f,0.10f);
texcoords1[11] = new TexCoord2f(0.75f,0.35f);
texcoords1[12] = new TexCoord2f(0.65f,0.75f);
texcoords1[13] = new TexCoord2f(0.35f,0.75f);
texcoords1[14] = new TexCoord2f(0.25f,0.35f);
texcoords1[15] = new TexCoord2f(0.50f,0.10f);
texcoords1[16] = new TexCoord2f(0.75f,0.35f);
texcoords1[17] = new TexCoord2f(0.65f,0.75f);
texcoords1[18] = new TexCoord2f(0.35f,0.75f);
texcoords1[19] = new TexCoord2f(0.25f,0.35f);
// I like Geometry Info. It's easier to create
shapes ;-)
GeometryInfo gi = new
GeometryInfo(GeometryInfo.POLYGON_ARRAY);
// initialize the geometry info here
gi.setUseCoordIndexOnly(true);
gi.setCoordinateIndices(indices);
gi.setCoordinates(pts);
gi.setStripCounts(stripCounts);
// one set of 2D textures
gi.setTextureCoordinateParams(1, 2);
// for unit 0, apply texcoords1
gi.setTextureCoordinates(0, texcoords1);
// gi.indexify(true);
NormalGenerator ng = new NormalGenerator();
ng.generateNormals(gi);
gi.recomputeIndices();
// stripify
Stripifier st = new Stripifier();
st.stripify(gi);
gi.recomputeIndices();
GeometryArray myPolyhedron = gi.getGeometryArray();
Shape3D shape = new Shape3D();
shape.setGeometry(myPolyhedron);
/** Appearance **/
Appearance app = new Appearance();
Material mat = new Material();
PolygonAttributes polyAtt= new
PolygonAttributes(PolygonAttributes.POLYGON_FILL,
PolygonAttributes.CULL_BACK,
0.0f);
app.setMaterial(mat);
app.setPolygonAttributes(polyAtt);
try
{
if (texImageURL == null) // applet mode
texImageURL = new
java.net.URL(getCodeBase().toString() +
"/stone.jpg");
// if texture ok lets load it.
Texture tex = new TextureLoader(texImageURL,
this).getTexture();
app.setTexture(tex);
TextureAttributes texAttr = new
TextureAttributes();
texAttr.setTextureMode(TextureAttributes.MODULATE);
app.setTextureAttributes(texAttr);
}
catch (java.net.MalformedURLException ex)
{
System.out.println(ex.getMessage());
}
Texture tex = new TextureLoader(texImageURL,
this).getTexture();
app.setTexture(tex);
TextureAttributes texAttr = new TextureAttributes();
texAttr.setTextureMode(TextureAttributes.MODULATE);
app.setTextureAttributes(texAttr);
shape.setAppearance(app);
TransformGroup tg=new TransformGroup();
tg.addChild(shape);
GraphicsConfiguration config =
SimpleUniverse.getPreferredConfiguration();
setLayout(new BorderLayout());
Canvas3D c = new Canvas3D(config);
SimpleUniverse universe = new SimpleUniverse(c);
add("Center",c);
BranchGroup group = new BranchGroup();
group.addChild(tg);
Color3f light1Color = new Color3f(0.99f, 0.99f,
0.82f);
Vector3f light1Direction = new Vector3f(0.4f,
-0.2f, -1.0f);
Color3f light2Color = new Color3f(0.82f, 0.99f,
0.99f);
Vector3f light2Direction = new Vector3f(-0.5f,
-0.5f, -0.70f);
DirectionalLight dl = new
DirectionalLight(light1Color,light1Direction);
dl.setInfluencingBounds(bounds);
DirectionalLight dl2 = new
DirectionalLight(light2Color,light2Direction);
dl2.setInfluencingBounds(bounds);
// a blue background
Background background = new Background(new
Color3f(0.0f,0.2f,0.5f));
background.setApplicationBounds(bounds);
group.addChild(background);
// add the behaviors to the ViewingPlatform
ViewingPlatform viewingPlatform =
universe.getViewingPlatform();
viewingPlatform.setNominalViewingTransform();
PlatformGeometry pg = new PlatformGeometry();
pg.addChild(dl);
pg.addChild(dl2);
viewingPlatform.setPlatformGeometry(pg);
// add orbit behavior to ViewingPlatform
OrbitBehavior orbit = new OrbitBehavior(c,
OrbitBehavior.REVERSE_ALL |
OrbitBehavior.STOP_ZOOM);
orbit.setSchedulingBounds(bounds);
viewingPlatform.setViewPlatformBehavior(orbit);
universe.addBranchGraph(group);
}
static public void main(String[] args)
{
if (args.length > 0)
{
try
{
texImageURL = new java.net.URL("file:" +
args[0]);
}
catch (java.net.MalformedURLException ex)
{
System.out.println(ex.getMessage());
System.exit(1);
}
}
else
{
// the path to the image for an application
try {
texImageURL = new
java.net.URL("file:./earth.jpg");
}
catch (java.net.MalformedURLException ex)
{
ex.printStackTrace();
System.exit(1);
}
}
new MainFrame(new ThePolyhedron(),256,256);
}
} // end of class
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