alexsobiek / spacerace

Rewrite of the original 1973 Space Race game developed by Atari in Java

Space Race

Rewrite of the original Atari game Space Race from 1973 in Java.
This project was written for my COMP 170 Spring 2021 final project at Loyola University Chicago

Game Controls

Action	Player 1	Player 2
Up	W	Up Arrow
Down	S	Down Arrow

P: Pause
R: Restart

spacerace's Issues

Fix choppy player movement

Player movement is called on KeyInputEvent.Pressed event and moves according to the player's speed.

Possible Solution: Use the KeyInputEvent.Pressed and KeyInputEvent.Released to set a boolean for whether or not the player is moving and then move it on GameTickEvent instead

ConcurrentModificationException - Window.java:127

A ConcurrentModificationException error is occasionally thrown while trying to loop through stars and draw them. This does not happen each time the program runs, it's rather random and is normally thrown multiple times if thrown once.

Exception in thread "AWT-EventQueue-0" java.util.ConcurrentModificationException
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1543)
	at com.alexsobiek.SpaceRace.Window.paint(Window.java:127)
	at java.desktop/javax.swing.JComponent.paintChildren(JComponent.java:907)
	at java.desktop/javax.swing.JComponent.paint(JComponent.java:1083)
	at java.desktop/javax.swing.JComponent.paintChildren(JComponent.java:907)
	at java.desktop/javax.swing.JComponent.paint(JComponent.java:1083)
	at java.desktop/javax.swing.JLayeredPane.paint(JLayeredPane.java:590)
	at java.desktop/javax.swing.JComponent.paintChildren(JComponent.java:907)
	at java.desktop/javax.swing.JComponent.paintToOffscreen(JComponent.java:5262)
	at java.desktop/javax.swing.RepaintManager$PaintManager.paintDoubleBufferedImpl(RepaintManager.java:1643)
	at java.desktop/javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(RepaintManager.java:1618)
	at java.desktop/javax.swing.RepaintManager$PaintManager.paint(RepaintManager.java:1556)
	at java.desktop/javax.swing.RepaintManager.paint(RepaintManager.java:1323)
	at java.desktop/javax.swing.JComponent.paint(JComponent.java:1060)
	at java.desktop/java.awt.GraphicsCallback$PaintCallback.run(GraphicsCallback.java:39)
	at java.desktop/sun.awt.SunGraphicsCallback.runOneComponent(SunGraphicsCallback.java:78)
	at java.desktop/sun.awt.SunGraphicsCallback.runComponents(SunGraphicsCallback.java:115)
	at java.desktop/java.awt.Container.paint(Container.java:2002)
	at java.desktop/java.awt.Window.paint(Window.java:3940)
	at java.desktop/javax.swing.RepaintManager$4.run(RepaintManager.java:876)
	at java.desktop/javax.swing.RepaintManager$4.run(RepaintManager.java:848)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
	at java.desktop/javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:848)
	at java.desktop/javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:823)
	at java.desktop/javax.swing.RepaintManager.prePaintDirtyRegions(RepaintManager.java:772)
	at java.desktop/javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1890)
	at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:313)
	at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:770)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:721)
	at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:715)
	at java.base/java.security.AccessController.doPrivileged(Native Method)
	at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:85)
	at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:740)
	at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
	at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
	at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
	at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

SpaceRace/src/com/alexsobiek/SpaceRace/Window.java

Lines 127 to 130 in 2b7e91b

	stars.forEach(star -> {
	Location loc = star.getLocation();
	g.fillOval(loc.getX(), loc.getY(), 6, 6);
	});

Stars with direction LEFT do not respawn

Pausing the game while its not running then unpausing doubles the tick rate

Steps to Replicate

1. Wait for the game timer to run out
2. Press P to pause the game
3. Press R to restart the game
4. Press P again to unpause the game