试试这个:
// ... code
Target start = new Target();
start.setX(0);
start.setY(0);
Target aLine = new Target();
Target bLine = new Target();
aLine.setX(-65000);
aLine.setY(ress.getObstacle().getLine());
bLine.setX(65000);
bLine.setY(ress.getObstacle().getLine());
Line2D line = new Line2D.Float(aLine.getX(), aLine.getY(), bLine.getX(), bLine.getY());
List<Target> list = new ArrayList<Target>();
if (!(ress.getObstacle().getLine() == 0)) {
//check if points are there , if yes just reinitialize a linea-lineb and calculate the same in for:
String a = "";
try {
a = ress.getObstacle().getA().toStrin`enter code here`g();
} catch (NullPointerException e) {
}
if (!(a == "")) {
aLine.setX(ress.getObstacle().getA().getX());
aLine.setY(ress.getObstacle().getLine());
bLine.setX(ress.getObstacle().getB().getX());
bLine.setY(ress.getObstacle().getLine());
Line2D lineNew = new Line2D.Float(aLine.getX(), aLine.getY(), bLine.getX(), bLine.getY());
for (Target t : ress.getTargets()) {
Line2D line2 = new Line2D.Float(start.getX(), start.getY(), t.getX(), t.getY());
if (!line2.intersectsLine(lineNew)) {
list.add(t);
}
}
} else {
//-------------------start old part----------------------------------
for (Target t : ress.getTargets()) {
Line2D line2 = new Line2D.Float(start.getX(), start.getY(), t.getX(), t.getY());
if (!line2.intersectsLine(line)) {
list.add(t);
}
}
///////-------end old part
}
} else {
double angA = Math.toDegrees(StrictMath.atan2(ress.getObstacle().getA().getX() - start.getX(), ress.getObstacle().getA().getY() - start.getY()));
double angB = Math.toDegrees(StrictMath.atan2(ress.getObstacle().getB().getX() - start.getX(), ress.getObstacle().getB().getY() - start.getY()));
Boolean up = (ress.getObstacle().getA().getY()>0)&(ress.getObstacle().getB().getY()>0);
Boolean left = (ress.getObstacle().getA().getX()<0)&(ress.getObstacle().getB().getX()<0);
Boolean right = (ress.getObstacle().getA().getX()>0)&(ress.getObstacle().getB().getX()>0);
for (Target t : ress.getTargets()) {
double angT = Math.toDegrees(StrictMath.atan2(t.getX() - start.getX(), t.getY() - start.getY()));
if (up) {
if (!((angT > Math.min(angA,angB)) & (angT < Math.max(angB,angA))))
list.add(t);
} else
if (right || left) {
if ( !((angT > Math.min(angA,angB)) & (angT< Math.max(angB,angA)))) {
list.add(t);
}
} else
{
if ( ((angT > Math.min(angA,angB)) & (angT< Math.max(angB,angA)))) {
list.add(t);
}
}
}
}
sol.setTargets(list);