An Object
// From: http://www.micg.et.fh-stralsund.de/Java3D/java3D.htm#Bild1
import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.Frame;
import java.awt.GraphicsConfiguration;
import javax.media.j3d.Appearance;
import javax.media.j3d.BranchGroup;
import javax.media.j3d.Canvas3D;
import javax.media.j3d.GeometryArray;
import javax.media.j3d.PolygonAttributes;
import javax.media.j3d.QuadArray;
import javax.media.j3d.Shape3D;
import javax.media.j3d.Transform3D;
import javax.media.j3d.TransformGroup;
import javax.vecmath.Color3f;
import javax.vecmath.Point3f;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.universe.SimpleUniverse;
public class FarbWurfelAsQuads extends Applet {
/**
* init Methoden fur die Darstellung als Applet
*/
public void init() {
setLayout(new BorderLayout());
GraphicsConfiguration config = SimpleUniverse
.getPreferredConfiguration();
canvas3D = new Canvas3D(config);
add("Center", canvas3D);
BranchGroup szene = macheSzene();
szene.compile();
universe = new SimpleUniverse(canvas3D);
universe.getViewingPlatform().setNominalViewingTransform();
universe.addBranchGraph(szene);
}
/**
* Erstellt den Szenegraphen
*
* @return BranchGroup
*/
public BranchGroup macheSzene() {
BranchGroup objWurzel = new BranchGroup();
// Transformation, 2 Rotationen:
Transform3D drehung = new Transform3D();
Transform3D drehung2 = new Transform3D();
drehung.rotX(Math.PI / 4.0d);
drehung2.rotY(Math.PI / 5.0d);
drehung.mul(drehung2);
drehung.setScale(0.5d);
TransformGroup objDreh = new TransformGroup(drehung);
Shape3D shape = new Shape3D(makeCube(), makeAppearance());
objDreh.addChild(shape);
objWurzel.addChild(objDreh);
return objWurzel;
}
/**
* Erstellung des ColorCube
*
* @return
*/
private QuadArray makeCube() {
QuadArray plane = new QuadArray(24, GeometryArray.COORDINATES
| GeometryArray.COLOR_3);
// Punkte und Farben
Point3f pa = new Point3f(-1.0f, 1.0f, -1.0f);
Point3f pb = new Point3f(-1.0f, -1.0f, -1.0f);
Point3f pc = new Point3f(1.0f, -1.0f, -1.0f);
Point3f pd = new Point3f(1.0f, 1.0f, -1.0f);
Point3f pe = new Point3f(-1.0f, 1.0f, 1.0f);
Point3f pf = new Point3f(-1.0f, -1.0f, 1.0f);
Point3f pg = new Point3f(1.0f, -1.0f, 1.0f);
Point3f ph = new Point3f(1.0f, 1.0f, 1.0f);
// Coloreigenschaften
Color3f red = new Color3f(1.0f, 0.0f, 0.0f);
Color3f blue = new Color3f(0.0f, 0.0f, 1.0f);
Color3f green = new Color3f(0.0f, 1.0f, 0.0f);
Color3f cyan = new Color3f(0.0f, 1.0f, 1.0f);
Color3f yellow = new Color3f(1.0f, 1.0f, 0.0f);
Color3f magenta = new Color3f(1.0f, 0.0f, 1.0f);
// 1. Seite
plane.setCoordinate(0, pa);
plane.setColor(0, red);
plane.setCoordinate(1, pb);
plane.setColor(1, red);
plane.setCoordinate(2, pc);
plane.setColor(2, red);
plane.setCoordinate(3, pd);
plane.setColor(3, red);
// 2. Seite
plane.setCoordinate(4, pe);
plane.setColor(4, blue);
plane.setCoordinate(5, pf);
plane.setColor(5, blue);
plane.setCoordinate(6, pg);
plane.setColor(6, blue);
plane.setCoordinate(7, ph);
plane.setColor(7, blue);
// 3. Seite
plane.setCoordinate(8, pe);
plane.setColor(8, green);
plane.setCoordinate(9, pf);
plane.setColor(9, green);
plane.setCoordinate(10, pb);
plane.setColor(10, green);
plane.setCoordinate(11, pa);
plane.setColor(11, green);
// 4. Seite
plane.setCoordinate(12, pd);
plane.setColor(12, cyan);
plane.setCoordinate(13, pc);
plane.setColor(13, cyan);
plane.setCoordinate(14, pg);
plane.setColor(14, cyan);
plane.setCoordinate(15, ph);
plane.setColor(15, cyan);
// 5. Seite
plane.setCoordinate(16, pe);
plane.setColor(16, yellow);
plane.setCoordinate(17, pa);
plane.setColor(17, yellow);
plane.setCoordinate(18, pd);
plane.setColor(18, yellow);
plane.setCoordinate(19, ph);
plane.setColor(19, yellow);
// 6. Seite
plane.setCoordinate(20, pf);
plane.setColor(20, magenta);
plane.setCoordinate(21, pb);
plane.setColor(21, magenta);
plane.setCoordinate(22, pc);
plane.setColor(22, magenta);
plane.setCoordinate(23, pg);
plane.setColor(23, magenta);
// ubergib den Wurfel
return plane;
}
/**
* Wurfeldarstellung
*
* @return Appearance
*/
private Appearance makeAppearance() {
Appearance a = new Appearance();
PolygonAttributes p = new PolygonAttributes();
p.setCullFace(PolygonAttributes.CULL_NONE);
a.setPolygonAttributes(p);
return a;
}
/**
* gibt speicher frei
*/
public void destroy() {
universe.removeAllLocales();
}
public static void main(String[] args) {
frame = new MainFrame(new FarbWurfelAsQuads(), 500, 500);
frame.setTitle("ColorCube mittels Geometrieklassen");
}
//---- Attribute -----------------------
private SimpleUniverse universe;
private Canvas3D canvas3D;
private static Frame frame;
}
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