@Override
public FGEArea intersect(FGEArea area) {
if (area.containsArea(this)) {
return this.clone();
}
if (containsArea(area)) {
return area.clone();
}
if (area instanceof FGEAbstractLine) {
return computeLineIntersection((FGEAbstractLine) area);
}
if (area instanceof FGERoundRectangle) {
return computeRectangleIntersection((FGERoundRectangle) area);
}
if (area instanceof FGEHalfPlane) {
return computeHalfPlaneIntersection((FGEHalfPlane) area);
}
FGEIntersectionArea returned = new FGEIntersectionArea(this, area);
if (returned.isDevelopable()) {
return returned.makeDevelopped();
} else {
return returned;
}
}
@Override
public FGEArea union(FGEArea area) {
if (containsArea(area)) {
return clone();
}
if (area.containsArea(this)) {
return area.clone();
}
return new FGEUnionArea(this, area);
}
/**
* Compute point where supplied line intersects with shape outline trying to minimize distance
* from "from" point
*
* <p>Returns null if no intersection was found
*
* @param aLine
* @param from
* @return
*/
public final FGEPoint outlineIntersect(FGELine line, FGEPoint from) {
FGEArea intersection = getShape().intersect(line);
return intersection.getNearestPoint(from);
}
private FGEArea computeLineIntersection(FGEAbstractLine line) {
FGERectangle rectangle = new FGERectangle(x, y, width, height, _filling);
FGEArea returned = rectangle.intersect(line);
if (returned instanceof FGEEmptyArea) {
return returned;
} else if (returned instanceof FGEPoint) {
FGEPoint p = (FGEPoint) returned;
if (containsPoint(p)) {
return p;
}
if (getNorthEastRoundBounds().containsPoint(p)) {
return getNorthEastRound().intersect(line);
}
if (getSouthEastRoundBounds().containsPoint(p)) {
return getSouthEastRound().intersect(line);
}
if (getNorthWestRoundBounds().containsPoint(p)) {
return getNorthWestRound().intersect(line);
}
if (getSouthWestRoundBounds().containsPoint(p)) {
return getSouthWestRound().intersect(line);
}
return new FGEEmptyArea();
} else {
FGEPoint p1;
FGEPoint p2;
if (returned instanceof FGEUnionArea && ((FGEUnionArea) returned).isUnionOfPoints()) {
p1 = (FGEPoint) ((FGEUnionArea) returned).getObjects().firstElement();
p2 = (FGEPoint) ((FGEUnionArea) returned).getObjects().elementAt(1);
if (containsPoint(p1) && containsPoint(p2)) {
return returned;
}
} else if (returned instanceof FGESegment) {
p1 = ((FGESegment) returned).getP1();
p2 = ((FGESegment) returned).getP2();
if (containsPoint(p1) && containsPoint(p2)) {
return returned;
}
} else {
logger.warning("Unexpected " + returned);
return new FGEEmptyArea();
}
FGEArea newP1 = p1;
FGEArea newP2 = p2;
if (getNorthEastRoundBounds().containsPoint(p1)) {
newP1 = getNorthEastRound().intersect(line);
}
if (getSouthEastRoundBounds().containsPoint(p1)) {
newP1 = getSouthEastRound().intersect(line);
}
if (getNorthWestRoundBounds().containsPoint(p1)) {
newP1 = getNorthWestRound().intersect(line);
}
if (getSouthWestRoundBounds().containsPoint(p1)) {
newP1 = getSouthWestRound().intersect(line);
}
if (getNorthEastRoundBounds().containsPoint(p2)) {
newP2 = getNorthEastRound().intersect(line);
}
if (getSouthEastRoundBounds().containsPoint(p2)) {
newP2 = getSouthEastRound().intersect(line);
}
if (getNorthWestRoundBounds().containsPoint(p2)) {
newP2 = getNorthWestRound().intersect(line);
}
if (getSouthWestRoundBounds().containsPoint(p2)) {
newP2 = getSouthWestRound().intersect(line);
}
if (newP1 instanceof FGEPoint) {
if (newP2 instanceof FGEPoint) {
if (returned instanceof FGEUnionArea) {
return new FGEUnionArea(newP1, newP2);
} else if (returned instanceof FGESegment) {
return new FGESegment((FGEPoint) newP1, (FGEPoint) newP2);
}
} else if (newP2 instanceof FGEEmptyArea) {
return newP1;
}
} else if (newP1 instanceof FGEEmptyArea) {
if (newP2 instanceof FGEPoint) {
return newP2;
} else {
return new FGEEmptyArea();
}
} else if (newP1 instanceof FGEUnionArea
&& ((FGEUnionArea) newP1).isUnionOfPoints()
&& newP2 instanceof FGEUnionArea
&& ((FGEUnionArea) newP2).isUnionOfPoints()
&& newP1.equals(newP2)) {
return newP1;
}
logger.warning("Unexpected " + returned + " newP1=" + newP1 + " newP2=" + newP2);
return new FGEEmptyArea();
}
}
