public void setStops(final List<Stop> STOPS) {
stops.clear();
for (Stop stop : STOPS) {
stops.put(stop.getOffset(), stop);
}
init();
}
public GradientLookup(final Stop... STOPS) {
stops = new TreeMap<>();
for (Stop stop : STOPS) {
stops.put(stop.getOffset(), stop);
}
init();
}
private Color interpolateColor(
final Stop LOWER_BOUND, final Stop UPPER_BOUND, final double POSITION) {
final double POS =
(POSITION - LOWER_BOUND.getOffset()) / (UPPER_BOUND.getOffset() - LOWER_BOUND.getOffset());
final double DELTA_RED =
(UPPER_BOUND.getColor().getRed() - LOWER_BOUND.getColor().getRed()) * POS;
final double DELTA_GREEN =
(UPPER_BOUND.getColor().getGreen() - LOWER_BOUND.getColor().getGreen()) * POS;
final double DELTA_BLUE =
(UPPER_BOUND.getColor().getBlue() - LOWER_BOUND.getColor().getBlue()) * POS;
final double DELTA_OPACITY =
(UPPER_BOUND.getColor().getOpacity() - LOWER_BOUND.getColor().getOpacity()) * POS;
double red = Helper.clamp(0d, 1d, (LOWER_BOUND.getColor().getRed() + DELTA_RED));
double green = Helper.clamp(0d, 1d, (LOWER_BOUND.getColor().getGreen() + DELTA_GREEN));
double blue = Helper.clamp(0d, 1d, (LOWER_BOUND.getColor().getBlue() + DELTA_BLUE));
double opacity = Helper.clamp(0d, 1d, (LOWER_BOUND.getColor().getOpacity() + DELTA_OPACITY));
return Color.color(red, green, blue, opacity);
}