public BranchGroup doTransform() throws VisADException, RemoteException {
DataDisplayLink[] Links = getLinks();
if (Links == null || Links.length == 0) {
return null;
}
DataDisplayLink link = Links[0];
ShadowTypeJ3D type = (ShadowTypeJ3D) link.getShadow();
boolean doByRef = false;
if (isByRefUsable(link, type) && ShadowType.byReference) {
doByRef = true;
type =
new ShadowImageByRefFunctionTypeJ3D(
link.getData().getType(),
link,
null,
((ShadowFunctionOrSetType) type.getAdaptedShadowType()).getInheritedValues(),
(ShadowFunctionOrSetType) type.getAdaptedShadowType(),
type.getLevelOfDifficulty());
}
BranchGroup branch = null;
if ((lastByRef && doByRef) || (!lastByRef && !doByRef)) {
branch = getBranch();
}
lastByRef = doByRef;
if (branch == null) {
branch = new BranchGroup();
branch.setCapability(BranchGroup.ALLOW_DETACH);
branch.setCapability(BranchGroup.ALLOW_CHILDREN_EXTEND);
branch.setCapability(BranchGroup.ALLOW_CHILDREN_READ);
branch.setCapability(BranchGroup.ALLOW_CHILDREN_WRITE);
last_curve_size = -1;
last_zaxis_value = Float.NaN;
last_alpha_value = Float.NaN;
last_data_hash_code = -1;
adjust_projection_seam = false; // 27FEB2012: Projection Seam Change Bug Fix
}
// initialize valueArray to missing
int valueArrayLength = getDisplay().getValueArrayLength();
float[] valueArray = new float[valueArrayLength];
for (int i = 0; i < valueArrayLength; i++) {
valueArray[i] = Float.NaN;
}
Data data;
try {
data = link.getData();
} catch (RemoteException re) {
if (visad.collab.CollabUtil.isDisconnectException(re)) {
getDisplay().connectionFailed(this, link);
removeLink(link);
return null;
}
throw re;
}
if (data == null) {
branch = null;
addException(new DisplayException("Data is null: DefaultRendererJ3D.doTransform"));
} else {
// check MathType of non-null data, to make sure it is a single-band
// image or a sequence of single-band images
MathType mtype = link.getType();
if (!isImageType(mtype)) {
throw new BadMappingException("must be image or image sequence");
}
link.start_time = System.currentTimeMillis();
link.time_flag = false;
vbranch = null;
// transform data into a depiction under branch
long t1 = System.currentTimeMillis();
try {
if (type
instanceof
ShadowImageByRefFunctionTypeJ3D) { // GEOMETRY/COLORBYTE REUSE LOGIC Only for ByRef for
// Time being
if (checkAction()) { // This generally decides whether at all retransformation is required
// or not.
type.doTransform(branch, data, valueArray, link.getDefaultValues(), this);
}
} else { // Not byRef (ShadowImageFunctionTypeJ3D)
type.doTransform(branch, data, valueArray, link.getDefaultValues(), this);
}
} catch (RemoteException re) {
if (visad.collab.CollabUtil.isDisconnectException(re)) {
getDisplay().connectionFailed(this, link);
removeLink(link);
return null;
}
throw re;
}
long t2 = System.currentTimeMillis();
// System.err.println("Time taken:" + (t2-t1));
}
link.clearData();
return branch;
}
