Re: [JAVA3D] Is it a bug? java.lang.NullPointerException

[Kelvin Chung]

White Morph wrote:

Hi,

I did something like this:
        .....
        GeometryInfo gi = new GeometryInfo(ga);
        ga = gi.getIndexedGeometryArray();
        .....
ga is an IndexedGeometryArray object and has all its data, I got the following exception:

java.lang.NullPointerException
       at com.sun.j3d.utils.geometry.GeometryInfo.fillIn(GeometryInfo.java:2348)
       at 
com.sun.j3d.utils.geometry.GeometryInfo.getIndexedGeometryArray(GeometryInfo.java:2764)
       at 
com.sun.j3d.utils.geometry.GeometryInfo.getIndexedGeometryArray(GeometryInfo.java:2816)
......................
Did I do it wrong or it's a bug? Thanks.



Check out the source code of utility GeometryInfo. In

public IndexedGeometryArray getIndexedGeometryArray()

   .....

  IndexedGeometryArray ga = null;

     switch (prim) {
     case TRIANGLE_ARRAY:
         IndexedTriangleArray ta = new IndexedTriangleArray(vertexCount,
             vertexFormat, texCoordSetCount, texCoordSetMap,
             coordinateIndices.length);
         ga = (IndexedGeometryArray)ta;
         break;
     case QUAD_ARRAY:
         IndexedQuadArray qa = new IndexedQuadArray(vertexCount,
             vertexFormat, texCoordSetCount, texCoordSetMap,
             coordinateIndices.length);
         ga = (IndexedGeometryArray)qa;
         break;
     case TRIANGLE_STRIP_ARRAY:
         IndexedTriangleStripArray tsa = new IndexedTriangleStripArray(
             vertexCount, vertexFormat, texCoordSetCount,
             texCoordSetMap, coordinateIndices.length, stripCounts);
         ga = (IndexedGeometryArray)tsa;
         break;
     case TRIANGLE_FAN_ARRAY:
         IndexedTriangleFanArray tfa = new IndexedTriangleFanArray(
             vertexCount, vertexFormat, texCoordSetCount,
             texCoordSetMap, coordinateIndices.length, stripCounts);
         ga = (IndexedGeometryArray)tfa;
         break;
     }
     // Fill in the GeometryArray object
     fillIn(ga, byRef, interleaved, nio);     <==== Throw Exception
when ga = NULL
    return ga;
}
This happen when primitive is not one of the above 4 types. It may be a bug
or improper use of GeometryInfo.  Check to see which primitive got form
your applications is not handle. Let us know if you find a bug and send us a
test program.
Thanks.

- Kelvin
-------------------
Java 3D Team
Sun Microsystems Inc.
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