mirror of
https://gitlab.com/arnekeller/kit-programmieren-ws1920-final1.git
synced 2024-11-08 18:00:38 +00:00
Correctly handle a few edge cases in put train
This commit is contained in:
parent
1653db3c3b
commit
afb5e62d24
@ -1,6 +1,15 @@
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<?xml version="1.0" encoding="UTF-8"?>
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<project version="4">
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<component name="FindBugsConfigurable">
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<option name="make" value="true" />
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<option name="effort" value="default" />
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<option name="priority" value="Medium" />
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<option name="excludeFilter" value="" />
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</component>
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<component name="ProjectRootManager" version="2" languageLevel="JDK_1_8" default="false" project-jdk-name="11" project-jdk-type="JavaSDK">
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<output url="file://$PROJECT_DIR$/out" />
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</component>
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<component name="SuppressionsComponent">
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<option name="suppComments" value="[]" />
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</component>
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</project>
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@ -98,6 +98,16 @@ class MainTest {
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cmpInOut("train_one_length_input.txt", "train_one_length_output.txt");
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}
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@Test
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void switchInconsistency() throws IOException {
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cmpInOut("switch_inconsistency_input.txt", "switch_inconsistency_output.txt");
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}
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@Test
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void largeGenericTest() throws IOException {
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cmpInOut("lgt_input.txt", "lgt_output.txt");
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}
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private void cmpInOut(String in, String out) throws IOException {
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System.setIn(new ByteArrayInputStream(readFile(in)));
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ByteArrayOutputStream output = new ByteArrayOutputStream();
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@ -97,7 +97,11 @@ public final class Terminal {
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*/
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public static String readLine() {
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try {
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return IN.readLine();
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String line = IN.readLine();
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if ("breakpoint".equals(line)) {
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return readLine();
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}
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return line;
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} catch (final IOException e) {
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/*
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* The IOException will not occur during tests executed by the praktomat, therefore the
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@ -65,10 +65,33 @@ public abstract class Rail {
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*/
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public abstract boolean contains(Vector2D position);
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/**
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* @param position the point to check
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* @return whether the point can be inside this rail (not on the edge)
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*/
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public abstract boolean canContain(Vector2D position);
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/**
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* Get the direction trains can move on this rail starting at the specified position
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* @param position the position to check
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* @return the direction trains can move starting at that position
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*/
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public abstract Vector2D getDirectionFrom(Vector2D position);
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/**
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* Check whether this rail extends in the specified direction.
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* @param position start position
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* @param direction the (normalized) direction to check
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* @return whether this rail can extend from that position in that direction
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*/
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public abstract boolean allowsDirectionFrom(Vector2D position, Vector2D direction);
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/**
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*
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* @param position
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* @param direction
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* @param steps
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* @return
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*/
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public abstract Vector2D move(Vector2D position, Vector2D direction, long steps);
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}
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@ -1,5 +1,6 @@
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package edu.kit.informatik.model;
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import edu.kit.informatik.Terminal;
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import edu.kit.informatik.ui.InvalidInputException;
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import java.util.Collection;
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@ -201,24 +202,57 @@ public class RailwayNetwork {
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* @param direction has to be (0,1) (0,-1) (1,0) (-1,0), will be modified if turn is necessary
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* @return next position, null if off the rails
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*/
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public Vector2D move(final Vector2D position, final Vector2D direction) {
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public Vector2D move(Vector2D position, Vector2D direction) {
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Rail containingRail = findContainingRail(position);
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if (containingRail != null) {
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return position.add(direction);
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}
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Rail[] touchingRails = findTouchingRails(position);
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Vector2D nextPossiblePosition = position.add(direction);
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Rail possibleContainingRail = findRailPotentiallyContaining(nextPossiblePosition);
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if (possibleContainingRail != null && !possibleContainingRail.contains(position.subtract(direction))) {
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Vector2D positionOnThatRail = possibleContainingRail.move(position, direction, 1);
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/*
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if ((positionOnThatRail == null || positionOnThatRail.equals(position)) && touchingRails.length == 2) {
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Vector2D onRailOne = touchingRails[0].move(position, new Vector2D(direction), 1);
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Vector2D onRailTwo = touchingRails[1].move(position, new Vector2D(direction), 1);
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if ((position.equals(onRailOne) || onRailOne == null) && !position.equals(onRailTwo)) {
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// we are moving on rail two
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Vector2D newDirection = touchingRails[1].getDirectionFrom(position);
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direction.copyFrom(newDirection);
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return onRailTwo;
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} else if ((position.equals(onRailTwo) || onRailTwo == null) && !position.equals(onRailOne)) {
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Vector2D newDirection = touchingRails[0].getDirectionFrom(position);
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direction.copyFrom(newDirection);
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return onRailOne;
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} else {
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throw new RuntimeException("wtf");
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}
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}
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*/
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return positionOnThatRail;
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}
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if (touchingRails.length == 0) {
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return null;
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} else if (touchingRails.length == 1) {
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// at the end of a rail
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// either derail or move backwards
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Vector2D nextPosition = position.add(direction);
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if (!touchingRails[0].contains(nextPosition) && !touchingRails[0].connectsTo(nextPosition)) {
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return null;
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} else {
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return nextPosition;
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}
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return touchingRails[0].move(position, direction, 1);
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}
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Vector2D onRailOne = touchingRails[0].move(position, new Vector2D(direction), 1);
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Vector2D onRailTwo = touchingRails[1].move(position, new Vector2D(direction), 1);
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if (position.equals(onRailOne) || onRailOne == null) {
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// we are moving on rail two
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Vector2D newDirection = touchingRails[1].getDirectionFrom(position);
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direction.copyFrom(newDirection);
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return onRailTwo;
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} else if (position.equals(onRailTwo) || onRailTwo == null) {
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Vector2D newDirection = touchingRails[0].getDirectionFrom(position);
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direction.copyFrom(newDirection);
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return onRailOne;
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} else {
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throw new RuntimeException("wtf");
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}
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/*
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Vector2D nextPosition = position.add(direction);
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if (touchingRails[0].contains(nextPosition) || touchingRails[0].connectsTo(nextPosition)) {
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return nextPosition;
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@ -239,6 +273,7 @@ public class RailwayNetwork {
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} else {
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return null;
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}
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*/
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}
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/**
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@ -250,6 +285,10 @@ public class RailwayNetwork {
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return rails.values().stream().filter(rail -> rail.contains(position)).findFirst().orElse(null);
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}
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private Rail findRailPotentiallyContaining(Vector2D position) {
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return rails.values().stream().filter(rail -> rail.canContain(position)).findFirst().orElse(null);
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}
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/**
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* Find all rails that *touch* (not contain) this position.
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* @param position the position to check
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@ -2,6 +2,7 @@ package edu.kit.informatik.model;
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import edu.kit.informatik.ui.InvalidInputException;
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import java.util.Arrays;
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import java.util.Objects;
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/**
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@ -12,21 +13,17 @@ import java.util.Objects;
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*/
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public final class Switch extends Rail {
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/**
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* Start position.
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* First leg of the switch.
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*/
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private final Vector2D start;
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private final Track positionOne;
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/**
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* End position one, has to be in a straight line from start.
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* Second leg of the switch.
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*/
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private final Vector2D end1;
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/**
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* End position two, has to be in a straight line from start.
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*/
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private final Vector2D end2;
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private final Track positionTwo;
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/**
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* Currently selected position (either one or two).
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*/
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private Vector2D selection;
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private Track selection;
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/**
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* Construct a new switch.
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@ -44,30 +41,33 @@ public final class Switch extends Rail {
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throw new InvalidInputException("start has to be connected in straight lines to end positions!");
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}
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// make sure caller can not modify internal state after calling
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this.start = new Vector2D(start);
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this.end1 = new Vector2D(end1);
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this.end2 = new Vector2D(end2);
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this.positionOne = new Track(start, end1, -1);
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this.positionTwo = new Track(start, end2, -1);
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}
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@Override
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public boolean canConnectTo(Vector2D point) {
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return point.equals(start) || point.equals(end1) || point.equals(end2);
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return positionOne.canConnectTo(point) || positionTwo.canConnectTo(point);
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}
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@Override
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public boolean connectsTo(Vector2D point) {
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return point.equals(start) || point.equals(selection);
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return (positionOne.canConnectTo(point) && positionTwo.canConnectTo(point))
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|| (selection != null && selection.canConnectTo(point));
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}
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@Override
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public boolean canConnectToRail(Rail rail) {
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return rail.canConnectTo(start) || rail.canConnectTo(end1) || rail.canConnectTo(end2);
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return rail.canConnectToRail(positionOne) || rail.canConnectToRail(positionTwo);
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}
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@Override
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public boolean switchTo(Vector2D position) {
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if (position.equals(end1) || position.equals(end2)) {
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selection = new Vector2D(position.getX(), position.getY());
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if (positionOne.canConnectTo(position)) {
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selection = positionOne;
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return true;
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} else if (positionTwo.canConnectTo(position)) {
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selection = positionTwo;
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return true;
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}
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return false;
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@ -79,46 +79,65 @@ public final class Switch extends Rail {
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}
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@Override
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public boolean contains(final Vector2D position) {
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public boolean contains(Vector2D position) {
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if (selection == null) {
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return false;
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}
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if (start.getX() == selection.getX() && position.getX() == start.getX()) {
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if (start.getY() < selection.getY()) {
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return start.getY() < position.getY() && position.getY() < selection.getY();
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} else {
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return start.getY() > position.getY() && position.getY() > selection.getY();
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}
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} else if (start.getY() == selection.getY() && position.getY() == start.getY()) {
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if (start.getX() < selection.getX()) {
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return start.getX() < position.getX() && position.getX() < selection.getX();
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} else {
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return start.getX() > position.getX() && position.getX() > selection.getX();
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}
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return selection.contains(position);
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}
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@Override
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public boolean canContain(Vector2D position) {
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return positionOne.contains(position) || positionTwo.contains(position);
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}
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@Override
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public Vector2D move(Vector2D position, Vector2D direction, long steps) {
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if (contains(position) || connectsTo(position)) {
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return selection.move(position, direction, steps);
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} else {
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return null;
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}
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return false;
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}
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@Override
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public Vector2D getDirectionFrom(Vector2D position) {
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if (selection == null) {
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return null;
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} else if (start.equals(position)) {
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return new Vector2D(selection.getX() - start.getX(), selection.getY() - start.getY()).normalized();
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} else if (selection.equals(position)) {
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return new Vector2D(start.getX() - selection.getX(), start.getY() - selection.getY()).normalized();
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} else {
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return null;
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}
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return selection.getDirectionFrom(position);
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}
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private Vector2D[] getPossibleDirectionsFrom(Vector2D position) {
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if (positionOne.canConnectTo(position) && positionTwo.canConnectTo(position)) {
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return new Vector2D[] {
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positionOne.getDirectionFrom(position), positionOne.getDirectionFrom(position).negated(),
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positionTwo.getDirectionFrom(position), positionTwo.getDirectionFrom(position).negated()};
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} else if (positionOne.canConnectTo(position)) {
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return new Vector2D[] {positionOne.getDirectionFrom(position)};
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} else if (positionTwo.canConnectTo(position)) {
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return new Vector2D[] {positionTwo.getDirectionFrom(position)};
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} else {
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return new Vector2D[0];
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}
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}
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@Override
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public boolean allowsDirectionFrom(Vector2D position, Vector2D direction) {
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return (selection != null && selection.contains(position))
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|| (positionOne.connectsTo(position) && positionOne.allowsDirectionFrom(position, direction))
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|| (positionTwo.connectsTo(position) && positionTwo.allowsDirectionFrom(position, direction));
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}
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@Override
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public String toString() {
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if (selection == null) {
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return String.format("s %d %s -> %s,%s", getIdentifier(), start, end1, end2);
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return String.format("s %d %s -> %s,%s", getIdentifier(), positionOne.getStart(),
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positionOne.getEnd(), positionTwo.getEnd());
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} else {
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return String.format("s %d %s -> %s,%s %d", getIdentifier(),
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start, end1, end2, start.distanceTo(selection));
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positionOne.getStart(), positionOne.getEnd(), positionTwo.getEnd(),
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selection.getLength());
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}
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}
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@ -127,7 +146,8 @@ public final class Switch extends Rail {
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if (obj != null && getClass().equals(obj.getClass())) {
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final Switch otherSwitch = (Switch) obj;
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return start.equals(otherSwitch.start) && end1.equals(otherSwitch.end1) && end2.equals(otherSwitch.end2);
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return positionOne.equals(otherSwitch.positionOne) && positionTwo.equals(otherSwitch.positionTwo)
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&& Objects.equals(selection, otherSwitch.selection);
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}
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return false;
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@ -135,6 +155,6 @@ public final class Switch extends Rail {
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@Override
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public int hashCode() {
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return Objects.hash(start, end1, end2);
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return Objects.hash(positionOne, positionTwo, selection);
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}
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}
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@ -72,6 +72,30 @@ public final class Track extends Rail {
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return false;
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}
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@Override
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public boolean canContain(Vector2D position) {
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return contains(position);
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}
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@Override
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public Vector2D move(Vector2D position, Vector2D direction, long steps) {
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Vector2D nextPosition = position.add(direction.scale(steps));
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if (contains(nextPosition) || connectsTo(nextPosition)) {
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return nextPosition;
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} else if (direction.equals(getDirectionFrom(start))) {
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return new Vector2D(end);
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} else if (direction.equals(getDirectionFrom(end))) {
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return new Vector2D(start);
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} else if (position.equals(end)) {
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direction.copyFrom(getDirectionFrom(end));
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return move(position, getDirectionFrom(end), steps);
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} else if (position.equals(start)) {
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direction.copyFrom(getDirectionFrom(start));
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return move(position, getDirectionFrom(start), steps);
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}
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return null;
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}
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@Override
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public Vector2D getDirectionFrom(Vector2D position) {
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// have to use long arithmetic here to avoid overflows
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@ -82,13 +106,37 @@ public final class Track extends Rail {
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return new Vector2D(Long.signum((long) start.getX() - (long) end.getX()),
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Long.signum((long) start.getY() - (long) end.getY()));
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} else {
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throw new IllegalArgumentException("can only compute direction from track ends");
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// in the middle of track, simply return direction from start
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return getDirectionFrom(start);
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}
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}
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@Override
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public boolean allowsDirectionFrom(Vector2D position, Vector2D direction) {
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if (contains(position)) {
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return true;
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} else if (connectsTo(position)) {
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return getDirectionFrom(position).equals(direction)
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|| getDirectionFrom(position).negated().equals(direction);
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}
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return false;
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}
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public Vector2D getStart() {
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return new Vector2D(start);
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}
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public Vector2D getEnd() {
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return new Vector2D(end);
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}
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public long getLength() {
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return start.distanceTo(end);
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}
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@Override
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public String toString() {
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return String.format("t %d %s -> %s %d", getIdentifier(), start, end, start.distanceTo(end));
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return String.format("t %d %s -> %s %d", getIdentifier(), start, end, getLength());
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}
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@Override
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@ -142,9 +142,10 @@ public final class Train {
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* @return whether the train was successfully placed
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* @throws InvalidInputException when the train is too long to place
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*/
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public boolean placeOn(final RailwayNetwork railNetwork, final Vector2D position, final Vector2D rawDirection)
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public boolean placeOn(RailwayNetwork railNetwork, Vector2D position, Vector2D rawDirection)
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throws InvalidInputException {
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Vector2D positioningDirection = rawDirection.normalized().negated();
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Vector2D direction = rawDirection.normalized();
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Vector2D positioningDirection = direction.negated();
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long length = getLength();
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if (length > Integer.MAX_VALUE) {
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// TODO: implement this case
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@ -157,10 +158,26 @@ public final class Train {
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if (length > 10000) {
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return false; // TODO: remove!
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}
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// TODO check that the requested direction is equal to the direction of one the tracks
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// check that the requested direction is equal to the direction of one the tracks
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if ((railNetwork.findContainingRail(position) != null
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&& !railNetwork.findContainingRail(position).allowsDirectionFrom(position, positioningDirection))
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|| (railNetwork.findTouchingRails(position).length > 0
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&& Arrays.stream(railNetwork.findTouchingRails(position))
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.noneMatch(rail -> rail.allowsDirectionFrom(position, direction)))) {
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return false;
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}
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if (railNetwork.findTouchingRails(position).length > 0
|
||||
&& (Arrays.stream(railNetwork.findTouchingRails(position))
|
||||
.noneMatch(rail -> rail.connectsTo(position)))) {
|
||||
return false;
|
||||
}
|
||||
// consider fuzz 9 (0,-1)
|
||||
for (int i = 1; i <= length; i++) {
|
||||
rollingStockPosition = railNetwork.move(rollingStockPosition, positioningDirection);
|
||||
if (positions.getLast().distanceTo(rollingStockPosition) == 0) {
|
||||
// stuck
|
||||
return false;
|
||||
}
|
||||
if (rollingStockPosition == null
|
||||
|| positions.contains(rollingStockPosition) && !positions.get(0).equals(rollingStockPosition)) {
|
||||
return false;
|
||||
|
@ -274,9 +274,9 @@ public final class TrainManager {
|
||||
Vector2D position = train.getFrontPosition();
|
||||
Vector2D direction = train.getDirection();
|
||||
Vector2D nextPosition = railNetwork.move(position, direction);
|
||||
if (nextPosition == null
|
||||
if (nextPosition == null || nextPosition.equals(position)
|
||||
|| train.isOnPosition(nextPosition) && !train.getRearPosition().equals(train.getFrontPosition())) {
|
||||
train.moveTo(railNetwork, nextPosition);
|
||||
train.moveTo(railNetwork, null);
|
||||
collisions.add(new HashSet<>(Arrays.asList(train)));
|
||||
} else {
|
||||
train.moveTo(railNetwork, nextPosition);
|
||||
|
@ -12,18 +12,18 @@ public class Vector2D {
|
||||
/**
|
||||
* First coordinate of the vector, usually referred to as 'x'.
|
||||
*/
|
||||
private int x;
|
||||
private long x;
|
||||
/**
|
||||
* Second coordinate of the vector, usally referred to as 'y'.
|
||||
* Second coordinate of the vector, usually referred to as 'y'.
|
||||
*/
|
||||
private int y;
|
||||
private long y;
|
||||
|
||||
/**
|
||||
* Construct a new vector.
|
||||
* @param x first component
|
||||
* @param y second component
|
||||
*/
|
||||
public Vector2D(final int x, final int y) {
|
||||
public Vector2D(long x, long y) {
|
||||
this.x = x;
|
||||
this.y = y;
|
||||
}
|
||||
@ -32,13 +32,13 @@ public class Vector2D {
|
||||
* Copy a vector, creating a new object.
|
||||
* @param other a vector
|
||||
*/
|
||||
public Vector2D(final Vector2D other) {
|
||||
public Vector2D(Vector2D other) {
|
||||
this.x = other.x;
|
||||
this.y = other.y;
|
||||
}
|
||||
|
||||
/**
|
||||
* @param input two numbers separated by a comma
|
||||
* @param input two 32-bit numbers separated by a comma
|
||||
* @return a vector containing the two numbers, null otherwise
|
||||
*/
|
||||
public static Vector2D parse(final String input) {
|
||||
@ -58,8 +58,8 @@ public class Vector2D {
|
||||
* @param other the point to measure distance to
|
||||
* @return the manhattan distance
|
||||
*/
|
||||
public long distanceTo(final Vector2D other) {
|
||||
return Math.abs((long) this.x - (long) other.x) + Math.abs((long) this.y - (long) other.y);
|
||||
public long distanceTo(Vector2D other) {
|
||||
return other != null ? Math.abs(this.x - other.x) + Math.abs(this.y - other.y) : 0;
|
||||
}
|
||||
|
||||
/**
|
||||
@ -89,7 +89,7 @@ public class Vector2D {
|
||||
* @param other another vector
|
||||
* @return the difference of this vector and the other vector
|
||||
*/
|
||||
public Vector2D subtract(final Vector2D other) {
|
||||
public Vector2D subtract(Vector2D other) {
|
||||
return new Vector2D(x - other.x, y - other.y);
|
||||
}
|
||||
|
||||
@ -97,21 +97,41 @@ public class Vector2D {
|
||||
* @param movement vector to add
|
||||
* @return component-wise sum of this vector and the other vector
|
||||
*/
|
||||
public Vector2D add(final Vector2D movement) {
|
||||
public Vector2D add(Vector2D movement) {
|
||||
return new Vector2D(x + movement.x, y + movement.y);
|
||||
}
|
||||
|
||||
public Vector2D scale(long multiplier) {
|
||||
return new Vector2D(x * multiplier, y * multiplier);
|
||||
}
|
||||
|
||||
/**
|
||||
* @return the first component of this vector
|
||||
* @return the first component of this vector, casted to an int
|
||||
*/
|
||||
public int getX() {
|
||||
return (int) x;
|
||||
}
|
||||
|
||||
/**
|
||||
*
|
||||
* @return
|
||||
*/
|
||||
public long getLongX() {
|
||||
return x;
|
||||
}
|
||||
|
||||
/**
|
||||
* @return the second component of this vector
|
||||
* @return the second component of this vector, casted to an int
|
||||
*/
|
||||
public int getY() {
|
||||
return (int) y;
|
||||
}
|
||||
|
||||
/**
|
||||
*
|
||||
* @return
|
||||
*/
|
||||
public long getLongY() {
|
||||
return y;
|
||||
}
|
||||
|
||||
@ -131,6 +151,15 @@ public class Vector2D {
|
||||
this.y = y;
|
||||
}
|
||||
|
||||
/**
|
||||
*
|
||||
* @param other
|
||||
*/
|
||||
public void copyFrom(Vector2D other) {
|
||||
this.x = other.x;
|
||||
this.y = other.y;
|
||||
}
|
||||
|
||||
@Override
|
||||
public boolean equals(final Object obj) {
|
||||
if (obj != null && getClass().equals(obj.getClass())) {
|
||||
|
Loading…
Reference in New Issue
Block a user