RETOURExemple Java
Affichage 3D d'une sphère éclairée par une autre sphère lui tournant autour.
/*
* @(#)SphereMotion.java 1.29 98/10/23 17:27:45
*
* Copyright (c) 1996-1998 Sun Microsystems, Inc.
* All Rights Reserved.
*
*/
import java.applet.Applet;
import java.awt.BorderLayout;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.geometry.Sphere;
import com.sun.j3d.utils.universe.*;
import javax.media.j3d.*;
import javax.vecmath.*;
import java.util.Enumeration;
public class SphereMotion extends Applet {
private static final int DIRECTIONAL_LIGHT = 0;
private static final int POINT_LIGHT = 1;
private static final int SPOT_LIGHT = 2;
private static int lightType = POINT_LIGHT;
public BranchGroup createSceneGraph(SimpleUniverse u) {
Color3f eColor = new Color3f(0.0f,0.0f,0.0f);
Color3f sColor = new Color3f(1.0f,1.0f,1.0f);
Color3f objColor = new Color3f(0.6f,0.6f,0.6f);
Color3f lColor1 = new Color3f(1.0f,0.0f,0.0f);
Color3f lColor2 = new Color3f(0.0f,1.0f,0.0f);
Color3f alColor = new Color3f(0.2f,0.2f,0.2f);
Color3f bgColor = new Color3f(0.05f,0.05f,0.2f);
Transform3D t;
BranchGroup objRoot = new BranchGroup();
TransformGroup objScale = new TransformGroup();
Transform3D t3d = new Transform3D();
t3d.setScale(0.4);
objScale.setTransform(t3d);
objRoot.addChild(objScale);
BoundingSphere bounds =
new BoundingSphere(new Point3d(0.0,0.0,0.0),100.0);
Background bg = new Background(bgColor);
bg.setApplicationBounds(bounds);
objScale.addChild(bg);
Material m = new Material(objColor,eColor,
objColor,sColor,100.0f);
Appearance a = new Appearance();
m.setLightingEnable(true);
a.setMaterial(m);
Sphere sph = new Sphere(1.0f,
Sphere.GENERATE_NORMALS,
80,a);
objScale.addChild(sph);
TransformGroup l1RotTrans = new TransformGroup();
l1RotTrans.setCapability(TransformGroup.ALLOW
_TRANSFORM_WRITE);
objScale.addChild(l1RotTrans);
TransformGroup l2RotTrans = new TransformGroup();
l2RotTrans.setCapability(TransformGroup.ALLOW
_TRANSFORM_WRITE);
objScale.addChild(l2RotTrans);
t = new Transform3D();
Vector3d lPos1 = new Vector3d(0.0,0.0,2.0);
t.set(lPos1);
TransformGroup l1Trans = new TransformGroup(t);
l1RotTrans.addChild(l1Trans);
t = new Transform3D();
Vector3d lPos2 = new Vector3d(0.5,0.8,2.0);
t.set(lPos2);
TransformGroup l2Trans = new TransformGroup(t);
l2RotTrans.addChild(l2Trans);
ColoringAttributes caL1 = new ColoringAttributes();
ColoringAttributes caL2 = new ColoringAttributes();
caL1.setColor(lColor1);
caL2.setColor(lColor2);
Appearance appL1 = new Appearance();
Appearance appL2 = new Appearance();
appL1.setColoringAttributes(caL1);
appL2.setColoringAttributes(caL2);
l1Trans.addChild(new Sphere(0.05f,appL1));
l2Trans.addChild(new Sphere(0.05f,appL2));
AmbientLight aLgt = new AmbientLight(alColor);
Light lgt1 = null;
Light lgt2 = null;
Point3f lPoint = new Point3f(0.0f,0.0f,0.0f);
Point3f atten = new Point3f(1.0f,0.0f,0.0f);
Vector3f lDirect1 = new Vector3f(lPos1);
Vector3f lDirect2 = new Vector3f(lPos2);
lDirect1.negate();
lDirect2.negate();
switch (lightType) {
case DIRECTIONAL_LIGHT:
lgt1 = new DirectionalLight(lColor1,lDirect1);
lgt2 = new DirectionalLight(lColor2,lDirect2);
break;
case POINT_LIGHT:
lgt1 = new PointLight(lColor1,lPoint,atten);
lgt2 = new PointLight(lColor2,lPoint,atten);
break;
case SPOT_LIGHT:
lgt1 = new SpotLight(lColor1,lPoint,atten,lDirect1,
25.0f * (float)Math.PI / 180.0f,10.0f);
lgt2 = new SpotLight(lColor2,lPoint,atten,lDirect2,
25.0f * (float)Math.PI / 180.0f,10.0f);
break; }
aLgt.setInfluencingBounds(bounds);
lgt1.setInfluencingBounds(bounds);
lgt2.setInfluencingBounds(bounds);
objScale.addChild(aLgt);
l1Trans.addChild(lgt1);
l2Trans.addChild(lgt2);
Transform3D yAxis = new Transform3D();
Alpha rotor1Alpha = new Alpha(-1,Alpha.INCREASING_ENABLE,
0,0,
4000,0,0,
0,0,0);
RotationInterpolator rotator1 =
new RotationInterpolator(rotor1Alpha,
l1RotTrans,
yAxis,
0.0f,(float) Math.PI*2.0f);
rotator1.setSchedulingBounds(bounds);
l1RotTrans.addChild(rotator1);
Alpha rotor2Alpha = new Alpha(-1,Alpha.INCREASING_ENABLE,
0,0,
1000,0,0,
0,0,0);
RotationInterpolator rotator2 =
new RotationInterpolator(rotor2Alpha,
l2RotTrans,
yAxis,
0.0f,0.0f);
bounds = new BoundingSphere(new Point3d(0.0,0.0,0.0),
100.0);
rotator2.setSchedulingBounds(bounds);
l2RotTrans.addChild(rotator2);
TransformGroup vpTrans =
u.getViewingPlatform().getViewPlatformTransform();
Transform3D axisOfTranslation = new Transform3D();
Alpha transAlpha = new Alpha(-1,
Alpha.INCREASING_ENABLE |
Alpha.DECREASING_ENABLE,
0,0,
5000,0,0,
5000,0,0);
axisOfTranslation.rotY(-Math.PI/2.0);
PositionInterpolator translator =
new PositionInterpolator(transAlpha,
vpTrans,
axisOfTranslation,
2.0f,3.5f);
translator.setSchedulingBounds(bounds);
objScale.addChild(translator);
objRoot.compile();
return objRoot;
}
public SphereMotion() {
setLayout(new BorderLayout());
Canvas3D c = new Canvas3D(null);
add("Center",c);
SimpleUniverse u = new SimpleUniverse(c);
BranchGroup scene = createSceneGraph(u);
u.getViewingPlatform().setNominalViewingTransform();
u.addBranchGraph(scene);
}
public static void main(String[] args) {
String usage = "Usage: java SphereMotion
[-point | -spot | -dir]";
for (int i = 0; i < args.length; i++) {
if (args[i].startsWith("-")) {
if (args[i].equals("-point")) {
System.out.println("Using point lights");
lightType = POINT_LIGHT; }
else
if (args[i].equals("-spot")) {
System.out.println("Using spot lights");
lightType = SPOT_LIGHT; }
else
if (args[i].equals("-dir")) {
System.out.println("Using directional lights");
lightType = DIRECTIONAL_LIGHT; }
else {
System.out.println(usage);
System.exit(0); } }
else {
System.out.println(usage);
System.exit(0); } }
new MainFrame(new SphereMotion(),700,700);
}
}
Remarques,erreurs
janey@lib.univ-fcomte.fr