/**
* Modifies a PlotData object used by this window. This is an optimisation to do with current
* pixel size.
*
* @param state plot state
* @param data plot data object - may be modified
*/
private void adjustPlotData(SphericalPlotState state, PlotData data) {
if (data instanceof PointSelection) {
Points points = ((PointSelection) data).getPoints();
if (points != null) {
Object basePoints = WrapUtils.getWrapped(points);
if (basePoints instanceof SphericalPolarPointStore) {
/* If the data is a spherical polar point store, tell it
* roughly what the display pixel size is for this plot.
* This enables skipping some expensive calculaations of
* error points where it is known that they will end up in
* the same pixel as the error point. */
SphericalPolarPointStore sphPoints = (SphericalPolarPointStore) basePoints;
Dimension size = getPlot().getSize();
int scale = Math.max(size.width, size.height);
/* This is a rough estimate, but it should be an
* underestimate, which is safe though perhaps not
* maximally efficient. */
double minTanErr = 1.0 / (scale * state.getZoomScale());
sphPoints.setMinimumTanError(minTanErr);
}
}
}
}
/**
* Returns the SphericalAxesSelector associated with a given PointSelector.
*
* @param psel point selector
* @return spherical axes selector
*/
private static SphericalAxesSelector getSphericalAxesSelector(PointSelector psel) {
return (SphericalAxesSelector) WrapUtils.getWrapped(psel.getAxesSelector());
}