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PlantUML is a component that allows to quickly write diagrams from text.
// THIS FILE HAS BEEN GENERATED BY A PREPROCESSOR.
/* +=======================================================================
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* | PlantUML : a free UML diagram generator
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package net.sourceforge.plantuml.activitydiagram3.ftile;
import static net.sourceforge.plantuml.utils.ObjectUtils.instanceOfAny;
import java.util.ArrayList;
import java.util.List;
import net.sourceforge.plantuml.klimt.UBackground;
import net.sourceforge.plantuml.klimt.UChange;
import net.sourceforge.plantuml.klimt.UShape;
import net.sourceforge.plantuml.klimt.UStroke;
import net.sourceforge.plantuml.klimt.UTranslate;
import net.sourceforge.plantuml.klimt.color.HColor;
import net.sourceforge.plantuml.klimt.color.HColors;
import net.sourceforge.plantuml.klimt.drawing.UGraphic;
import net.sourceforge.plantuml.klimt.drawing.UGraphicNo;
import net.sourceforge.plantuml.klimt.font.StringBounder;
import net.sourceforge.plantuml.klimt.geom.MinMax;
import net.sourceforge.plantuml.klimt.geom.XLine2D;
import net.sourceforge.plantuml.klimt.shape.ULine;
import net.sourceforge.plantuml.klimt.shape.UPolygon;
import net.sourceforge.plantuml.klimt.shape.URectangle;
public class CollisionDetector extends UGraphicNo {
@Override
public UGraphic apply(UChange change) {
return new CollisionDetector(this, change);
}
private final Context context;
private static CollisionDetector create(StringBounder stringBounder) {
return new CollisionDetector(stringBounder, UTranslate.none(), new Context());
}
private CollisionDetector(StringBounder stringBounder, UTranslate translate, Context context) {
super(stringBounder, translate);
this.context = context;
}
private CollisionDetector(CollisionDetector other, UChange change) {
// this(other.stringBounder,
// change instanceof UTranslate ? other.translate.compose((UTranslate) change) :
// other.translate);
super(other.getStringBounder(), change instanceof UTranslate ? other.getTranslate().compose((UTranslate) change)
: other.getTranslate());
if (!instanceOfAny(change, UBackground.class, HColor.class, UStroke.class, UTranslate.class))
throw new UnsupportedOperationException(change.getClass().toString());
this.context = other.context;
}
static class Context {
private final List rectangles = new ArrayList<>();
private final List snakes = new ArrayList<>();
private boolean manageSnakes;
public void drawDebug(UGraphic ug) {
for (MinMax minmax : rectangles)
if (collision(minmax))
minmax.drawGray(ug);
final HColor color = HColors.BLACK;
ug = ug.apply(color).apply(UStroke.withThickness(5));
for (Snake snake : snakes)
for (XLine2D line : snake.getHorizontalLines())
if (collision(line))
drawLine(ug, line);
}
private void drawLine(UGraphic ug, XLine2D line) {
ug = ug.apply(new UTranslate(line.getX1(), line.getY1()));
ug.draw(new ULine(line.getX2() - line.getX1(), line.getY2() - line.getY1()));
}
private boolean collision(XLine2D hline) {
for (MinMax r : rectangles)
if (collisionCheck(r, hline))
return true;
return false;
}
private boolean collision(MinMax r) {
for (Snake snake : snakes) {
for (XLine2D hline : snake.getHorizontalLines()) {
if (collisionCheck(r, hline)) {
return true;
}
}
}
return false;
}
}
private static boolean collisionCheck(MinMax rect, XLine2D hline) {
if (hline.getY1() != hline.getY2())
throw new IllegalArgumentException();
if (hline.getY1() < rect.getMinY())
return false;
if (hline.getY1() > rect.getMaxY())
return false;
final double x1 = Math.min(hline.getX1(), hline.getX2());
final double x2 = Math.max(hline.getX1(), hline.getX2());
if (x2 < rect.getMinX())
return false;
if (x1 > rect.getMaxX())
return false;
return true;
}
public void draw(UShape shape) {
if (shape instanceof UPolygon)
drawPolygone((UPolygon) shape);
else if (shape instanceof URectangle)
drawRectangle((URectangle) shape);
else if (shape instanceof Snake)
drawSnake((Snake) shape);
/*
* else { System.err.println("shape=" + shape.getClass() + " " + shape); }
*/
}
private void drawSnake(Snake shape) {
if (context.manageSnakes)
context.snakes.add(shape.translate(getTranslate()));
}
private void drawRectangle(URectangle shape) {
context.rectangles.add(shape.getMinMax().translate(getTranslate()));
}
private void drawPolygone(UPolygon shape) {
context.rectangles.add(shape.getMinMax().translate(getTranslate()));
}
public void drawDebug(UGraphic ug) {
context.drawDebug(ug);
}
public final void setManageSnakes(boolean manageSnakes) {
this.context.manageSnakes = manageSnakes;
}
}