/**
* transform data into a (Java3D or Java2D) scene graph; add generated scene graph components as
* children of group; group is Group (Java3D) or VisADGroup (Java2D); value_array are inherited
* valueArray values; default_values are defaults for each display.DisplayRealTypeVector; return
* true if need post-process
*/
public boolean doTransform(
Object group,
Data data,
float[] value_array,
float[] default_values,
DataRenderer renderer,
ShadowType shadow_api)
throws VisADException, RemoteException {
if (data.isMissing()) return false;
if (LevelOfDifficulty == NOTHING_MAPPED) return false;
if (!(data instanceof Text)) {
throw new DisplayException("data must be Text: " + "ShadowTextType.doTransform");
}
// get some precomputed values useful for transform
// length of ValueArray
int valueArrayLength = display.getValueArrayLength();
// mapping from ValueArray to DisplayScalar
int[] valueToScalar = display.getValueToScalar();
// mapping from ValueArray to MapVector
int[] valueToMap = display.getValueToMap();
Vector MapVector = display.getMapVector();
// array to hold values for various mappings
float[][] display_values = new float[valueArrayLength][];
// ????
// get values inherited from parent;
// assume these do not include SelectRange, SelectValue
// or Animation values - see temporary hack in
// DataRenderer.isTransformControl
int[] inherited_values = getInheritedValues();
for (int i = 0; i < valueArrayLength; i++) {
if (inherited_values[i] > 0) {
display_values[i] = new float[1];
display_values[i][0] = value_array[i];
}
}
boolean[][] range_select =
shadow_api.assembleSelect(
display_values, 1, valueArrayLength, valueToScalar, display, shadow_api);
if (range_select[0] != null && !range_select[0][0]) {
// data not selected
return false;
}
// get any text String and TextControl inherited from parent
String text_value = shadow_api.getParentText();
TextControl text_control = shadow_api.getParentTextControl();
boolean anyText = getAnyText();
if (anyText && text_value == null) {
// get any text String and TextControl from this
Vector maps = getSelectedMapVector();
if (!maps.isEmpty()) {
text_value = ((Text) data).getValue();
ScalarMap map = (ScalarMap) maps.firstElement();
text_control = (TextControl) map.getControl();
}
}
//
// never renders text ????
//
// add values to value_array according to SelectedMapVector
if (getIsTerminal()) {
// ????
return terminalTupleOrScalar(
group,
display_values,
text_value,
text_control,
valueArrayLength,
valueToScalar,
default_values,
inherited_values,
renderer,
shadow_api);
} else {
// nothing to render at a non-terminal TextType
}
return false;
}
