/**
* Determine if this label intersects the view or pick frustum.
*
* @param dc Current draw context.
* @return True if this label intersects the active frustum (view or pick). Otherwise false.
*/
protected boolean intersectsFrustum(DrawContext dc) {
View view = dc.getView();
Frustum frustum = view.getFrustumInModelCoordinates();
// Test the label's model coordinate point against the near and far clipping planes.
if (this.placePoint != null
&& (frustum.getNear().distanceTo(this.placePoint) < 0
|| frustum.getFar().distanceTo(this.placePoint) < 0)) {
return false;
}
if (dc.isPickingMode()) return dc.getPickFrustums().intersectsAny(this.screenExtent);
else return view.getViewport().intersects(this.screenExtent);
}
/**
* Constructs a new PickPointFrustum from another Frustum and screen rectangle
*
* @param frustum frustum to create the PickPointFrustum from
* @param rect screen rectangle to store with this frustum
*/
public PickPointFrustum(Frustum frustum, android.graphics.Rect rect) {
super(
frustum.getLeft(),
frustum.getRight(),
frustum.getBottom(),
frustum.getTop(),
frustum.getNear(),
frustum.getFar());
if (rect == null) {
String message = Logging.getMessage("nullValue.RectangleIsNull");
Logging.verbose(message);
throw new IllegalArgumentException(message);
}
this.screenRect = rect;
}
/** {@inheritDoc} */
public boolean intersects(Frustum frustum) {
if (frustum == null) {
String msg = Logging.getMessage("nullValue.FrustumIsNull");
Logging.error(msg);
throw new IllegalArgumentException(msg);
}
// FYI: this code is identical to that in Cylinder.intersects.
double intersectionPoint;
this.tmp1.set(this.bottomCenter);
this.tmp2.set(this.topCenter);
double effectiveRadius = this.getEffectiveRadius(frustum.getNear());
intersectionPoint = this.intersectsAt(frustum.getNear(), effectiveRadius, this.tmp1, this.tmp2);
if (intersectionPoint < 0) return false;
// Near and far have the same effective radius.
effectiveRadius = this.getEffectiveRadius(frustum.getFar());
intersectionPoint = this.intersectsAt(frustum.getFar(), effectiveRadius, this.tmp1, this.tmp2);
if (intersectionPoint < 0) return false;
effectiveRadius = this.getEffectiveRadius(frustum.getLeft());
intersectionPoint = this.intersectsAt(frustum.getLeft(), effectiveRadius, this.tmp1, this.tmp2);
if (intersectionPoint < 0) return false;
effectiveRadius = this.getEffectiveRadius(frustum.getRight());
intersectionPoint =
this.intersectsAt(frustum.getRight(), effectiveRadius, this.tmp1, this.tmp2);
if (intersectionPoint < 0) return false;
effectiveRadius = this.getEffectiveRadius(frustum.getTop());
intersectionPoint = this.intersectsAt(frustum.getTop(), effectiveRadius, this.tmp1, this.tmp2);
if (intersectionPoint < 0) return false;
effectiveRadius = this.getEffectiveRadius(frustum.getBottom());
intersectionPoint =
this.intersectsAt(frustum.getBottom(), effectiveRadius, this.tmp1, this.tmp2);
return intersectionPoint >= 0;
}
