CaRMtl/rene/zirkel/objects/LineCircleIntersectionObjec...

116 lines
2.9 KiB
Java

/*
Copyright 2006 Rene Grothmann, modified by Eric Hakenholz
This file is part of C.a.R. software.
C.a.R. is a free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, version 3 of the License.
C.a.R. is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package rene.zirkel.objects;
// file: LineCircleIntersectionObject.java
import rene.util.xml.XmlWriter;
import rene.zirkel.construction.Construction;
import rene.zirkel.structures.Coordinates;
public class LineCircleIntersectionObject extends IntersectionObject {
public LineCircleIntersectionObject(final Construction c,
final PrimitiveLineObject P1, final PrimitiveCircleObject P2,
final boolean first) {
super(c, P1, P2);
First = first;
validate();
}
@Override
public void updateCircleDep() {
((PrimitiveCircleObject) P2).addDep(this);
((PrimitiveLineObject) P1).addDep(this);
}
@Override
public void validate() {
final boolean oldvalid = Valid;
if (!P1.valid() || !P2.valid())
Valid = false;
else
Valid = true;
if (!Valid)
return;
final Coordinates c = PrimitiveLineObject.intersect(
(PrimitiveLineObject) P1, (PrimitiveCircleObject) P2);
if (c == null) {
if (oldvalid && getConstruction().shouldSwitch()) {
doSwitch();
if (!getConstruction().noteSwitch())
Switched = false;
} else if (oldvalid && Alternate && Away == null
&& getConstruction().canAlternate()) {
First = !First;
}
Valid = false;
return;
}
if (getAway() != null) {
final double x = getAway().getX(), y = getAway().getY();
final double r = (x - c.X) * (x - c.X) + (y - c.Y) * (y - c.Y);
final double r1 = (x - c.X1) * (x - c.X1) + (y - c.Y1) * (y - c.Y1);
boolean flag = (r > r1);
if (!StayAway)
flag = !flag;
if (flag) {
setXY(c.X, c.Y);
} else {
setXY(c.X1, c.Y1);
}
} else {
if (First) {
setXY(c.X, c.Y);
} else {
setXY(c.X1, c.Y1);
}
}
if (Restricted) {
if (!((PrimitiveLineObject) P1).contains(X, Y))
Valid = false;
if (!(((PrimitiveCircleObject) P2).getStart() == this || ((PrimitiveCircleObject) P2)
.getEnd() == this)
&& !((PrimitiveCircleObject) P2).contains(X, Y))
Valid = false;
}
}
@Override
public void printArgs(final XmlWriter xml) {
super.printArgs(xml);
if (First)
xml.printArg("which", "first");
else
xml.printArg("which", "second");
}
@Override
public boolean isSwitchable() {
return true;
}
@Override
public boolean canAlternate() {
return true;
}
}