mirror of
https://gitlab.com/arnekeller/kit-programmieren-ws1920-final1.git
synced 2024-11-08 18:00:38 +00:00
Do not teleport across gaps of size one
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parent
726bf0b0d6
commit
2649cd85e2
@ -128,6 +128,11 @@ class MainTest {
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cmpInOut("spt_input.txt", "spt_output.txt");
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}
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@Test
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void fuzz12() throws IOException {
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cmpInOut("fuzz12_input.txt", "fuzz12_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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@ -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.HashMap;
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import java.util.HashSet;
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import java.util.LinkedList;
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@ -207,13 +208,6 @@ public class RailwayNetwork {
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return containingRail.get().move(position, direction, steps);
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}
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final Rail[] touchingRails = findTouchingRails(position);
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final Vector2D nextPossiblePosition = position.add(direction);
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final Optional<Rail> possibleContainingRail = findRailPotentiallyContaining(nextPossiblePosition);
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if (possibleContainingRail.isPresent()
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&& !possibleContainingRail.get().contains(position.subtract(direction))) {
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return possibleContainingRail.get().move(position, direction, steps);
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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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@ -221,12 +215,14 @@ public class RailwayNetwork {
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}
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final Vector2D onRailOne = touchingRails[0].move(position, new Vector2D(direction), steps);
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final Vector2D onRailTwo = touchingRails[1].move(position, new Vector2D(direction), steps);
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if (position.equals(onRailOne) || onRailOne == null) {
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if (position.equals(onRailOne) || onRailOne == null
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|| (onRailTwo != null && onRailTwo.subtract(position).directionEquals(direction))) {
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// we are moving on rail two
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final 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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} else if (position.equals(onRailTwo) || onRailTwo == null
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|| onRailOne.subtract(position).directionEquals(direction)) {
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final Vector2D newDirection = touchingRails[0].getDirectionFrom(position);
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direction.copyFrom(newDirection);
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return onRailOne;
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@ -67,13 +67,26 @@ public class Vector2D {
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* Check whether this vector is parallel to another vector. Note that this method only works for vectors that
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* are parallel to one of the coordinate axes.
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*
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* @param other the point to measure distance to
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* @return the manhattan distance
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* @param other vector to compare
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* @return whether both are parallel
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*/
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public boolean isParallelTo(Vector2D other) {
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return x == 0 && other.x == 0 || y == 0 && other.y == 0;
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}
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/**
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* Calculate whether this vector points in the same direction as another. Note that this method only works for
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* vectors that are parallel to one of the coordinate axes.
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*
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* @param other vector to compare
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* @return whether they represent the same direction
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*/
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public boolean directionEquals(Vector2D other) {
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return x == 0 && x == other.x && Long.signum(y) == Long.signum(other.y)
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|| y == 0 && y == other.y && Long.signum(x) == Long.signum(other.x);
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}
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/**
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* Normalize this vector. Will essentially return a new vector with (x/|x|, y/|y|).
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*
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