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  Java3D VertexUpdater  (Read 1489 times)
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Offline zero

Junior Devvie





« Posted 2003-03-25 07:56:26 »

hi all,

you probably all know the Java3D GeometryUpdater for modifying GeometryArrays at runtime. Being sick of writng simple  updaters twice for the diffrent subclasses of GeometryArray and its vertexFormats, I wrote one to handle all ( http://games-net.de/files/zero_java3d_gvu.zip ):

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class GeometryVertexUpdater implements GeometryUpdater {

    public VertexUpdater getVertexUpdater();
   
    public void setVertexUpdater(VertexUpdater vertexUpdater):

    public void updateData(Geometry geometry);

}


loops through all vertices and calls the implented method of:

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public interface VertexUpdater {
   
    public void updateVertex(int index, Vertex vertex);
   
}


in this method you can modify the data of the Vertex:

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public class Vertex {
    public final static int COORDINATE;
    public final static int NORMAL;
    public final static int COLOR_3;
    public final static int COLOR_4;
    public final static int TEXTURE_COORDINATE_2;
    public final static int TEXTURE_COORDINATE_3;
    public final static int TEXTURE_COORDINATE_4;
   
   
    public Vertex(int vertexFormat);

    public Vertex(int vertexFormat, int texCoordSetCount);
   
    public int getVertexFormat();
   
    public int getTexCoordSetCount();
   
    public float[] getCoordinate();
   
    public float[] getNormal();
   
    public float[] getColor();
   
    public float[] getTextureCoordinate(int texCoordSet);

}


Note:
be sure to have set the Capabilities ALLOW_COUNT_READ, ALLOW_FORMAT_READ and READ/WRITE ones for the vertexFormat.


of course the isn't a performant as writing and updater only for a special type of Geometry, but hey you can use it only as a algorithm tester, ..

I would be happy receiving feedback, improvement ideas, or about my mistakes (hacked it today, no time for testing Wink)
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