What would be the best way to make a heath bar in greenfoot.
GrimCreeper312 wrote ...
2013/3/23
Heath Bar
1
2
There are several scenarios with support classes on the site for a health bar. My is called Progress bar/Health bar. Download the scenario and either copy/paste the code into a newly created actor class in your scenario or copy the Bar files into your scenario folder. You can review my scenario to see how to implement it into yours.
I am using danpost's bar. i get an error. here is the code that has the error
i need it so that the maximum value changes with the roundscore
public ScoreBar bar2 = new ScoreBar("","Score",0, roundScore);My bar class is not called 'ScoreBar', it is called 'Bar'. and the parameters do not look right for my Bar class either. Are you sure that is my Bar class?
yes i changed the name to score bar; i want to use a varible as the maximum value roundscore.
the orignal that i have is
public Bar bar = new Bar("Heath","points",0, 100); There is not need to change the name of the Bar class. You can create multiple bars as follows:
As long as 'roundscore' is assigned a value greater than zero, you should not get an error.
Bar scoreBar = new Bar("Score", "points", 0, roundscore);
Bar healthBar = new Bar("Health", "points", 0, 100);i did what u said at it gave me an error. if it means anything roundScore is static;
java.lang.ArithmeticException: / by zero at ScoreBar.newImage(ScoreBar.java:56) at ScoreBar.add(ScoreBar.java:110) at ScoreBar.<init>(ScoreBar.java:48) at Mw.<init>(Mw.java:13) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:525) at greenfoot.core.Simulation.newInstance(Simulation.java:578) at greenfoot.platforms.ide.WorldHandlerDelegateIDE$3.run(WorldHandlerDelegateIDE.java:408) at greenfoot.core.Simulation.runQueuedTasks(Simulation.java:465) at greenfoot.core.Simulation.maybePause(Simulation.java:279) at greenfoot.core.Simulation.runContent(Simulation.java:210) at greenfoot.core.Simulation.run(Simulation.java:203) java.lang.NullPointerException at greenfoot.World.addObject(World.java:392) at Mw.prepare(Mw.java:82) at Mw.<init>(Mw.java:33) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:525) at greenfoot.core.Simulation.newInstance(Simulation.java:578) at greenfoot.platforms.ide.WorldHandlerDelegateIDE$3.run(WorldHandlerDelegateIDE.java:408) at greenfoot.core.Simulation.runQueuedTasks(Simulation.java:465) at greenfoot.core.Simulation.maybePause(Simulation.java:279) at greenfoot.core.Simulation.runContent(Simulation.java:210) at greenfoot.core.Simulation.run(Simulation.java:203) java.lang.IllegalStateException: Actor not in world. An attempt was made to use the actor's location while it is not in the world. Either it has not yet been inserted, or it has been removed. at greenfoot.Actor.failIfNotInWorld(Actor.java:663) at greenfoot.Actor.getOneObjectAtOffset(Actor.java:867) at All.canSee(All.java:47) at Player.checkCollision(Player.java:63) at Player.act(Player.java:35) at greenfoot.core.Simulation.actActor(Simulation.java:565) at greenfoot.core.Simulation.runOneLoop(Simulation.java:523) at greenfoot.core.Simulation.runContent(Simulation.java:213) at greenfoot.core.Simulation.run(Simulation.java:203) java.lang.IllegalStateException: Actor not in world. An attempt was made to use the actor's location while it is not in the world. Either it has not yet been inserted, or it has been removed. at greenfoot.Actor.failIfNotInWorld(Actor.java:663) at greenfoot.Actor.getOneObjectAtOffset(Actor.java:867) at All.canSee(All.java:47) at Player.checkCollision(Player.java:71) at Player.act(Player.java:35) at greenfoot.core.Simulation.actActor(Simulation.java:565) at greenfoot.core.Simulation.runOneLoop(Simulation.java:523) at greenfoot.core.Simulation.runContent(Simulation.java:213) at greenfoot.core.Simulation.run(Simulation.java:203) java.lang.ArithmeticException: / by zero at Bar.newImage(Bar.java:56) at Bar.add(Bar.java:110) at Bar.<init>(Bar.java:48) at Mw.<init>(Mw.java:13) at PlayGame.checkClick(PlayGame.java:24) at PlayGame.act(PlayGame.java:17) at greenfoot.core.Simulation.actActor(Simulation.java:565) at greenfoot.core.Simulation.runOneLoop(Simulation.java:523) at greenfoot.core.Simulation.runContent(Simulation.java:213) at greenfoot.core.Simulation.run(Simulation.java:203) java.lang.ArithmeticException: / by zero at Bar.newImage(Bar.java:56) at Bar.add(Bar.java:110) at Bar.<init>(Bar.java:48) at Mw.<init>(Mw.java:13) at PlayGame.checkClick(PlayGame.java:24) at PlayGame.act(PlayGame.java:17) at greenfoot.core.Simulation.actActor(Simulation.java:565) at greenfoot.core.Simulation.runOneLoop(Simulation.java:523) at greenfoot.core.Simulation.runContent(Simulation.java:213) at greenfoot.core.Simulation.run(Simulation.java:203) java.lang.ArithmeticException: / by zero at Bar.newImage(Bar.java:56) at Bar.add(Bar.java:110) at Bar.<init>(Bar.java:48) at Mw.<init>(Mw.java:13) at PlayGame.checkClick(PlayGame.java:24) at PlayGame.act(PlayGame.java:17) at greenfoot.core.Simulation.actActor(Simulation.java:565) at greenfoot.core.Simulation.runOneLoop(Simulation.java:523) at greenfoot.core.Simulation.runContent(Simulation.java:213) at greenfoot.core.Simulation.run(Simulation.java:203) java.lang.ArithmeticException: / by zero at Bar.newImage(Bar.java:56) at Bar.add(Bar.java:110) at Bar.<init>(Bar.java:48) at Mw.<init>(Mw.java:13) at PlayGame.checkClick(PlayGame.java:24) at PlayGame.act(PlayGame.java:17) at greenfoot.core.Simulation.actActor(Simulation.java:565) at greenfoot.core.Simulation.runOneLoop(Simulation.java:523) at greenfoot.core.Simulation.runContent(Simulation.java:213) at greenfoot.core.Simulation.run(Simulation.java:203) java.lang.ArithmeticException: / by zero at Bar.newImage(Bar.java:56) at Bar.add(Bar.java:110) at Bar.<init>(Bar.java:48) at Mw.<init>(Mw.java:13) at PlayGame.checkClick(PlayGame.java:24) at PlayGame.act(PlayGame.java:17) at greenfoot.core.Simulation.actActor(Simulation.java:565) at greenfoot.core.Simulation.runOneLoop(Simulation.java:523) at greenfoot.core.Simulation.runContent(Simulation.java:213) at greenfoot.core.Simulation.run(Simulation.java:203)
You probably did everything EXCEPT make sure that 'roundscore' has a value greater than zero (like I said above).
roundScore = 500;
Please show your 'newImage' method in your ScoreBar class and specify which line is 56 in that class. Whatever you are dividing by in that line is equal to zero, which causes the error.
/**
* Method 'newImage': builds a new image for the bar, determined by the values set for it
*/
private void newImage()
{
int barValue = (int) (barWidth * (value - minimumValue) / (maximumValue - minimumValue));
GreenfootImage leftImg = new GreenfootImage(referenceText + " ", (int) fontSize, textColor, backgroundColor);
GreenfootImage rightImg = (showTextualUnits) ? new GreenfootImage(" " + value + " " + unitOfMeasure, (int) fontSize, textColor, backgroundColor) : new GreenfootImage(1, 1);
int maxX = (leftImg.getWidth() > rightImg.getWidth()) ? leftImg.getWidth() : rightImg.getWidth();
GreenfootImage barImg = new GreenfootImage(barWidth + 4, barHeight + 4);
barImg.setColor(backgroundColor);
barImg.fill();
barImg.setColor(textColor);
barImg.drawRect(0, 0, barImg.getWidth() - 1, barImg.getHeight() - 1);
if (value > minimumValue)
{
if (breakLow)
{
if (value > (usingBreakValue ? breakValue : (int) (breakPercent * (maximumValue - minimumValue) / 100 + minimumValue))) barImg.setColor(safeColor);
else barImg.setColor(dangerColor);
}
else
{
if (value < (usingBreakValue ? breakValue : (int) (breakPercent * (maximumValue - minimumValue) / 100 + minimumValue))) barImg.setColor(safeColor);
else barImg.setColor(dangerColor);
}
if (value == (usingBreakValue ? breakValue : (int) (breakPercent * (maximumValue - minimumValue) / 100 + minimumValue)))
{
int r = (int) ((safeColor.getRed() + dangerColor.getRed()) / 2);
int g = (int) ((safeColor.getGreen() + dangerColor.getGreen()) / 2);
int b = (int) ((safeColor.getBlue() + dangerColor.getBlue()) / 2);
barImg.setColor(new Color(r, g, b));
}
barImg.fillRect(2, 2, barValue, barHeight);
}
int sumX = 2 * maxX + barImg.getWidth();
int maxY = 0;
if (leftImg.getHeight() > maxY) maxY = leftImg.getHeight();
if (barImg.getHeight() > maxY) maxY = barImg.getHeight();
if (rightImg.getHeight() > maxY) maxY = rightImg.getHeight();
GreenfootImage image = new GreenfootImage(sumX, maxY);
image.setColor(backgroundColor);
image.fill();
image.drawImage(leftImg, maxX - leftImg.getWidth(), (image.getHeight() - leftImg.getHeight()) / 2);
image.drawImage(barImg, maxX, (image.getHeight() - barImg.getHeight()) / 2);
image.drawImage(rightImg, maxX + barImg.getWidth(), (image.getHeight() - rightImg.getHeight()) / 2);
setImage(image);
}where should i start the line count
should i count coments
There are more replies on the next page.
1
2