Hi Alex,
Point3f[] coordinates = new Point3f[geometry.getVertexCount()];
geometry.getCoordinates(0, coordinates); // << null pointer
You need to allocate coordinates for each Point3f before
passing it into the function getCoordinates().
i.e.
Point3f[] coordinates = new Point3f[geometry.getVertexCount()];
for (int i=0; i < coordinates.length; i++) {
coordintes[i] = new Point3f();
}
geometry.getCoordinates(0, coordinates);
- Kelvin
------------
Java 3D Team
Sun Microsystems Inc.
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>Date: Mon, 28 Jan 2002 18:29:06 -0000
>From: Alex Bowden <[EMAIL PROTECTED]>
>Subject: [JAVA3D] Problems trying to use NormalGenerator while reading data
from VRMLLoader
>To: [EMAIL PROTECTED]
>
>Hi
>
>I am using the VRMLloader to load objects from various sources. Some of the
>data is rather suspect. I would like to clean up the data on import
>(regenerate normals) and stripify and any other conditioning that is easily
>available.
>
>I am having trouble getting my hands on the data at an appropriate stage in
>the process. Is this in some subtle way directly controllable from the
>loader (at loader creation time) or is there some way I can hang the extra
>processing into the load activity.
>
>At the moment I am trying to post clean up the data with something like
>
>public static void cleanup(Group group) {
>
> for (int i=0;i<group.numChildren();i++) {
> Node node=group.getChild(i);
> if (node instanceof javax.media.j3d.Group) {
> cleanup((Group)node);
> } else if (node instanceof javax.media.j3d.Link) {
>
> ((Link)node).setCapability(Link.ALLOW_SHARED_GROUP_READ);
> cleanup((Group)((Link)node).getSharedGroup());
> } else if (node instanceof javax.media.j3d.Shape3D) {
>
>Shape3D part = (Shape3D)node;
>
>NormalGenerator ng = new NormalGenerator();
>
> Enumeration allGeometries = ((Shape3D)node).getAllGeometries();
> while (allGeometries.hasMoreElements()) {
> Object obj = allGeometries.nextElement();
>if (obj instanceof javax.media.j3d.TriangleArray) {
> GeometryInfo geometryInfo = new
>GeometryInfo(GeometryInfo.TRIANGLE_ARRAY);
>
> TriangleArray geometry = (TriangleArray)obj;
>
> Point3f[] coordinates = new
>Point3f[geometry.getVertexCount()];
>
> geometry.getCoordinates(0, coordinates); // << null pointer
>error here
>
> geometryInfo.setCoordinates(coordinates);
>
> ng.generateNormals(geometryInfo);
>
> geometry.setNormals(0, geometryInfo.getNormals());
> }
> }
> }
> }
> }
>
>but I get a java.lang.NullPointerException on trying to read the
>coordinates.
>
>at
>javax.media.j3d.GeometryArrayRetained.getCoordinates(GeometryArrayRetained.j
>ava:4127)
>at javax.media.j3d.GeometryArray.getCoordinates(GeometryArray.java:2454)
>
>The vertex count is real so why does the geometry fail on being read.
>
>Any pointers gratefully received.
>
> Thanks
>
> [EMAIL PROTECTED]
>
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