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# Untitled

By: a guest on Oct 17th, 2011  |  syntax: Java  |  size: 1.26 KB  |  views: 16  |  expires: Never
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1. import javax.media.j3d.Appearance;
2. import javax.media.j3d.BoundingSphere;
3. import javax.media.j3d.Bounds;
4. import javax.media.j3d.Material;
5. import javax.media.j3d.Transform3D;
6. import javax.media.j3d.TransformGroup;
7. import javax.vecmath.Point3d;
8. import javax.vecmath.Vector3f;
9.
10. import com.sun.j3d.utils.geometry.Sphere;
11.
12.
13. public class CelestialBody extends TransformGroup {
14.
15.         public Transform3D movement = null;
16.
17.         public final double timeScale = 0.0001f;
18.         public final double gravitationalConstant = 6.67384e-11; // m^3 / (kg * s^2)
19.
20.         public double mass = 1.0f; // kg. Mass should never be 0!!!
21.
22.         CelestialBody(float posX, float posY, float posZ) {
23.                 // This is set for the dynamic behaviour.
24.                 setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
25.
26.                 Transform3D t3d = new Transform3D();
27.                 t3d.setTranslation(new Vector3f(posX, posY, posZ));
28.                 setTransform(t3d);
29.                 setBounds(new BoundingSphere(new Point3d(0.0f, 0.0f, 0.0f), 10000.0f));
30.
31.                 Sphere sphere = new Sphere(1.0f, Sphere.GENERATE_NORMALS, 100, createAppearance());
32.
34.         }
35.
36.         private Appearance createAppearance() {
37.                 Appearance appear = new Appearance();
38.                 Material mat = new Material();
39.                 mat.setShininess(100.0f);
40.                 appear.setMaterial(mat);
41.
42.                 return appear;
43.         }
44. }
45.
46.
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