Exercise 10: Use of texture

Using Geometry with pre-generated texture coordinates (eg Sphere).

Load a jpg image as a texture, associate it with an Appearance, then create a Sphere with that appearance.

Texture	Sphere	Textured Sphere

Tips

       Appearance app = new Appearance();
       app.setTexture( ??? );
       Sphere sphere = new Sphere(1.0f, Sphere.GENERATE_TEXTURE_COORDS, app);

To load the texture use the TextureLoader class in the com.sun.j3d.utils.image package.

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Creating your own Geometry and texture coordinates (eg IndexedTriangleArray).

Same as the previous exercise but here we create our own geometry and texture coordinates.

Texture	Indexed Triangle Array	Textured Indexed Traingle Array

Tips

   private Geometry createGeometry()
   {
       IndexedTriangleArray ita = new IndexedTriangleArray(4, IndexedTriangleArray.COORDINATES | IndexedTriangleArray.TEXTURE_COORDINATE_2, 6);

       ita.setCoordinate(0, new Point3d(0, 0, 0));
       ita.setCoordinate(1, new Point3d(1, 0, 0));
       ita.setCoordinate(2, new Point3d(0, 1, 0));
       ita.setCoordinate(3, new Point3d(1, 1, 0));

       ita.setCoordinateIndex(0, 0);
       ita.setCoordinateIndex(1, 1);
       ita.setCoordinateIndex(2, 2);

       ita.setCoordinateIndex(3, 1);
       ita.setCoordinateIndex(4, 3);
       ita.setCoordinateIndex(5, 2);

       ita.setTextureCoordinate( ??? ); // repeat 4 times

       ita.setTextureCoordinateIndex( ??? ); // repeat 6 times

       return ita;
   }