CaRMtl/rene/zirkel/objects/CircleIntersectionObject.java
2018-09-04 22:51:42 -04:00

203 lines
6.7 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: CircleIntersectionObject.java
import rene.util.xml.XmlWriter;
import rene.zirkel.construction.Construction;
import rene.zirkel.structures.Coordinates;
public class CircleIntersectionObject extends IntersectionObject {
public CircleIntersectionObject(final Construction c,
final PrimitiveCircleObject P1, final PrimitiveCircleObject P2,
final boolean first) {
super(c, P1, P2);
First=first;
validate();
}
@Override
public void updateCircleDep() {
((PrimitiveCircleObject) P1).addDep(this);
((PrimitiveCircleObject) P2).addDep(this);
}
@Override
public void validate() {
// System.out.println(getName()+":"+First);
final boolean oldvalid=Valid;
if (!P1.valid()||!P2.valid()) {
Valid=false;
} else {
Valid=true;
}
if (!Valid) {
return;
}
final Coordinates c=PrimitiveCircleObject.intersect(
(PrimitiveCircleObject) 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;
}
// Gestion des intersections droite/cercle (droite au sens large) en mode DP :
if (((P1.isDPLineOrSegmentObject())&&(P2.isDPCircleObject()))
||(((P2.isDPLineOrSegmentObject())&&(P1.isDPCircleObject())))) {
// arc doit être la droite ou le segment hyperbolique :
PrimitiveCircleObject arc=(PrimitiveCircleObject) ((P1.isDPLineOrSegmentObject())?P1:P2);
// Calcul de la coord z du produit vectoriel OStart ^ OEnd :
Double prod1=(arc.getStart().getX()-arc.getX())*(arc.getEnd().getY()-arc.getY())
-(arc.getStart().getY()-arc.getY())*(arc.getEnd().getX()-arc.getX());
// Calcul de la coord z du produit vectoriel OI ^ OJ (I et J sont les deux pts
// d'intersection calculés) :
Double prod2=(c.X-arc.getX())*(c.Y1-arc.getY())-(c.Y-arc.getY())*(c.X1-arc.getX());
if (prod1*prod2>0) {
if (First) {
setXY(c.X, c.Y);
} else {
setXY(c.X1, c.Y1);
}
} else {
if (First) {
setXY(c.X1, c.Y1);
} else {
setXY(c.X, c.Y);
}
}
if (Restricted) {
if (!(((PrimitiveCircleObject) P1).getStart()==this||((PrimitiveCircleObject) P1).getEnd()==this)
&&!((PrimitiveCircleObject) P1).contains(X, Y)) {
Valid=false;
}
if (!(((PrimitiveCircleObject) P2).getStart()==this||((PrimitiveCircleObject) P2).getEnd()==this)
&&!((PrimitiveCircleObject) P2).contains(X, Y)) {
Valid=false;
}
}
return;
}
// Gestion des intersections droite/droite (droite au sens large) en mode DP :
else if((P1.isDPLineOrSegmentObject())&&(P2.isDPLineOrSegmentObject())) {
PrimitiveCircleObject Hz=Cn.getHZ();
if ((Hz!=P1)&&(Hz!=P2)) {
final double r=(c.X)*(c.X)+(c.Y)*(c.Y);
final double r1=(c.X1)*(c.X1)+(c.Y1)*(c.Y1);
final double R=Hz.getR()*Hz.getR();
if ((r>R)||(r1>R)) {
if (r<R) {
setXY(c.X, c.Y);
} else {
setXY(c.X1, c.Y1);
}
if (Restricted) {
if (!(((PrimitiveCircleObject) P1).getStart()==this||((PrimitiveCircleObject) P1).getEnd()==this)
&&!((PrimitiveCircleObject) P1).contains(X, Y)) {
Valid=false;
}
if (!(((PrimitiveCircleObject) P2).getStart()==this||((PrimitiveCircleObject) P2).getEnd()==this)
&&!((PrimitiveCircleObject) P2).contains(X, Y)) {
Valid=false;
}
}
return;
}
}
}
final PointObject oa=getAway();
if (oa!=null) {
final double x=oa.getX(), y=oa.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 (!(((PrimitiveCircleObject) P1).getStart()==this||((PrimitiveCircleObject) P1).getEnd()==this)
&&!((PrimitiveCircleObject) 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;
}
}