private Vec4 computeReferencePoint(DrawContext dc) {
if (dc.getViewportCenterPosition() != null)
return dc.getGlobe().computePointFromPosition(dc.getViewportCenterPosition());
java.awt.geom.Rectangle2D viewport = dc.getView().getViewport();
int x = (int) viewport.getWidth() / 2;
for (int y = (int) (0.5 * viewport.getHeight()); y >= 0; y--) {
Position pos = dc.getView().computePositionFromScreenPoint(x, y);
if (pos == null) continue;
return dc.getGlobe().computePointFromPosition(pos.getLatitude(), pos.getLongitude(), 0d);
}
return null;
}
static void aligntext(Graphics g, String text, Coord c, double ax, double ay) {
java.awt.FontMetrics m = g.getFontMetrics();
java.awt.geom.Rectangle2D ts = m.getStringBounds(text, g);
g.drawString(
text, (int) (c.x - ts.getWidth() * ax), (int) (c.y + m.getAscent() - ts.getHeight() * ay));
}
static Coord textsz(Graphics g, String text) {
java.awt.FontMetrics m = g.getFontMetrics();
java.awt.geom.Rectangle2D ts = m.getStringBounds(text, g);
return (new Coord((int) ts.getWidth(), (int) ts.getHeight()));
}