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