/**
* Create an screen image.
*
* @param tc the current {@link KMLTraversalContext}.
* @param overlay the <i>Overlay</i> element containing.
*
* @throws NullPointerException if the traversal context is null.
* @throws ArgumentException if the parent overlay or the traversal context is null.
*/
public KMLSurfaceImageImpl(KMLTraversalContext tc, KMLGroundOverlay overlay)
{
this.parent = overlay;
if (tc == null)
{
String msg = Logging.getMessage("nullValue.TraversalContextIsNull");
Logging.logger().severe(msg);
throw new ArgumentException(msg);
}
if (overlay == null)
{
String msg = Logging.getMessage("nullValue.ParentIsNull");
Logging.logger().severe(msg);
throw new ArgumentException(msg);
}
// Positions are specified either as a kml:LatLonBox or a gx:LatLonQuad
KMLLatLonBox box = overlay.getLatLonBox();
if (box != null)
{
Sector sector = KMLUtil.createSectorFromLatLonBox(box);
this.initializeGeometry(sector);
// Check to see if a rotation is provided. The rotation will be applied when the image is rendered, because
// how the rotation is performed depends on the globe.
Double rotation = box.getRotation();
if (rotation != null)
{
this.mustApplyRotation = true;
}
}
else
{
GXLatLongQuad latLonQuad = overlay.getLatLonQuad();
if (latLonQuad != null && latLonQuad.getCoordinates() != null)
{
this.initializeGeometry(latLonQuad.getCoordinates().list);
}
}
// Apply opacity to the surface image
String colorStr = overlay.getColor();
if (!WWUtil.isEmpty(colorStr))
{
Color color = WWUtil.decodeColorABGR(colorStr);
int alpha = color.getAlpha();
this.setOpacity((double)alpha / 255);
}
this.setPickEnabled(false);
}
/**
* Apply a rotation to the corner points of the overlay. This method is called the first time the polygon is
* rendered, if the position is specified using a rotated LatLon box.
*
* @param dc Current draw context.
*/
protected void applyRotation(DrawContext dc)
{
// Rotation applies only to ground overlay position with a LatLon box.
if (!(this.parent is KMLGroundOverlay))
{
return;
}
KMLLatLonBox box = ((KMLGroundOverlay)this.parent).getLatLonBox();
if (box != null)
{
Double rotation = box.getRotation();
if (rotation != null)
{
Sector sector = KMLUtil.createSectorFromLatLonBox(box);
java.util.List <LatLon> corners = KMLUtil.rotateSector(dc.getGlobe(), sector,
Angle.fromDegrees(rotation));
this.setOuterBoundary(corners);
}
}
}
