if (node == null) return(true);
/* multiply one vector with the matrix */
// Point3D v = ((TextureTreeNodeCore *)(node.getCore(0))).vertex[0];
BoundingSphere bs = node.getBoundingSphere();
boolean result = frustum.sphereInFrustum((float) bs.center.x, (float) bs.center.y, (float) bs.center.z, (float) bs.radius);
if (!result) {
return(result);
}