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[SOLVED!] [1.7.2/1.7.10] Bound must be positive Error

NovaViper

By NovaViper
in Modder Support

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NovaViper World Shaper

NovaViper

Posted
Posted

When I try to cross over to my custom dimension, I get this error:

 

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Here is my ChunkProvider:

 

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TeleporterNillax code:

 

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BlockPortalNillax:

 

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WorldGenZQuest:

 

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WorldGen MineableZQuest:

 

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Main Developer and Owner of Zero Quest

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TheGreyGhost Reality Controller

TheGreyGhost

Posted
Posted

hi

 

I suggest you place a breakpoint at ChunkProviderNillax.populate(ChunkProviderNillax.java:467 and see why it is trying to generate a random number with an upper bound less than 0.

 

My guess is that you haven't initialised your animal spawning list properly, i.e. maxGroupCount and minGroupCount, assuming my line numbering is the same as yours

 

                int i1 = spawnlistentry.minGroupCount + par6Random.nextInt(1 + spawnlistentry.maxGroupCount - spawnlistentry.minGroupCount);

 

Are you familiar with breakpoints and watches?  If not, try these

http://www.vogella.com/tutorials/EclipseDebugging/article.html

http://www.terryanderson.ca/debugging/run.html

 

-TGG

 

 

 

hugo_the_dwarf Diamond Finder

hugo_the_dwarf

Posted
Posted

Where in your code are you using "Random.nextInt(Unknown Source)" when using nextInt you have to use a postive and greater then 0 value (because it returns a random between 0 and value)

 

that is the only issue, then it crawls up from spawnAnimals to your populate function line 467. What is that line btw, can you just post that segment for me?

Currently updating my Mod to 1.10.2

https://bitbucket.org/hugo_the_dwarf/riseoftristram2016/src?at=master

NovaViper World Shaper

NovaViper

Posted
  • Author
Posted

It's somewhere in this part but I dont understand why im getting an error when I got an extact copy of the source (with some changes to the blocks)

 

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Main Developer and Owner of Zero Quest

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hugo_the_dwarf Diamond Finder

hugo_the_dwarf

Posted
Posted

Do you have to tell a dimension what mobs it can spawn? I think when it goes to spawn mobs it gets an empty list when it goes to randomly pick one to spawn "Random.nextInt(value)"

 

  On 8/3/2014 at 12:21 AM, TheGreyGhost said:

...

My guess is that you haven't initialised your animal spawning list properly, i.e. maxGroupCount and minGroupCount, assuming my line numbering is the same as yours

 

                int i1 = spawnlistentry.minGroupCount + par6Random.nextInt(1 + spawnlistentry.maxGroupCount - spawnlistentry.minGroupCount);

...

 

I'm just reading your errorlog and the stacktrace seems to lead to what TGG suggested.

Currently updating my Mod to 1.10.2

https://bitbucket.org/hugo_the_dwarf/riseoftristram2016/src?at=master

NovaViper World Shaper

NovaViper

Posted
  • Author
Posted

The problem is that I don't know where to put it at, it was working before and now it suddenly doesn't want to work anymore. I copied exactly from the source code and that still didn't work.

Main Developer and Owner of Zero Quest

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TheGreyGhost Reality Controller

TheGreyGhost

Posted
Posted

Hi

 

This line in vanilla retrieves your list of spawnable creatures

        List list = par1BiomeGenBase.getSpawnableList(EnumCreatureType.creature);

 

1) Place the breakpoint in your code here

SpawnerAnimals.performWorldGenSpawning(this.worldObj, biomegenbase, k + 8, l + 8, 16, 16, this.rand);

 

2) Step into performWorldGenSpawning

 

When you get to

        List list = par1BiomeGenBase.getSpawnableList(EnumCreatureType.creature);

 

Then inspect the list.  It will have a number of elements in it like this

    public static class SpawnListEntry extends WeightedRandom.Item
        {
            /** Holds the class of the entity to be spawned. */
            public Class entityClass;
            public int minGroupCount;
            public int maxGroupCount;

One of these will have maxGroupCount less than minGroupCount.  This is causing the problem.

 

Use your debugger to print the list item, which will tell you which Entity it is.  That should hopefully give you a clue.

 

If you have no joy with the debugger, you could use ordinary code instead, eg

 

From your code:

 if (TerrainGen.populate(p_73153_1_, worldObj, rand, p_73153_2_, p_73153_3_, flag, ANIMALS))
{
      List list = biomegenbase.getSpawnableList(EnumCreatureType.creature);
      System.out.println("biomegenbase.getSpawnableList:");
      for (Object entry : list) {
        System.out.println((BiomeGenBase.SpawnListEntry)entry);
      }

  SpawnerAnimals.performWorldGenSpawning(this.worldObj, biomegenbase, k + 8, l + 8, 16, 16, this.rand);
}

 

Run it, wait for it to crash, then look at the debug log and see which entry might have caused the problem.

 

-TGG

NovaViper World Shaper

NovaViper

Posted
  • Author
Posted
  On 8/6/2014 at 11:13 AM, TheGreyGhost said:

Hi

 

This line in vanilla retrieves your list of spawnable creatures

        List list = par1BiomeGenBase.getSpawnableList(EnumCreatureType.creature);

 

1) Place the breakpoint in your code here

SpawnerAnimals.performWorldGenSpawning(this.worldObj, biomegenbase, k + 8, l + 8, 16, 16, this.rand);

 

2) Step into performWorldGenSpawning

 

When you get to

        List list = par1BiomeGenBase.getSpawnableList(EnumCreatureType.creature);

 

Then inspect the list.  It will have a number of elements in it like this

    public static class SpawnListEntry extends WeightedRandom.Item
        {
            /** Holds the class of the entity to be spawned. */
            public Class entityClass;
            public int minGroupCount;
            public int maxGroupCount;

One of these will have maxGroupCount less than minGroupCount.  This is causing the problem.

 

Use your debugger to print the list item, which will tell you which Entity it is.  That should hopefully give you a clue.

 

If you have no joy with the debugger, you could use ordinary code instead, eg

 

From your code:

 if (TerrainGen.populate(p_73153_1_, worldObj, rand, p_73153_2_, p_73153_3_, flag, ANIMALS))
{
      List list = biomegenbase.getSpawnableList(EnumCreatureType.creature);
      System.out.println("biomegenbase.getSpawnableList:");
      for (Object entry : list) {
        System.out.println((BiomeGenBase.SpawnListEntry)entry);
      }

  SpawnerAnimals.performWorldGenSpawning(this.worldObj, biomegenbase, k + 8, l + 8, 16, 16, this.rand);
}

 

Run it, wait for it to crash, then look at the debug log and see which entry might have caused the problem.

 

-TGG

Thanks! When you said that the maxGroupCount might be last than the minGroupCount, I started looking through my custom biomes and discovered that I mixed up the two variables. Then I ran it and the dimension travel works perfectly without that error. :D

Main Developer and Owner of Zero Quest

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If I helped anyone, please give me a applaud and a thank you!

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