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Particle Problem


laifsjo
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Hello guys, i made a new particle in minecraft, and sometimes when i spawn it in the world using ModLoader.getMinecraftInstance().effectRenderer.addEffect(particleClass); it crashes, sometimes it works fine, but most of the time it crashes. this is the error i get:

2012-10-11 14:44:02 [iNFO] [sTDERR] java.util.ConcurrentModificationException
2012-10-11 14:44:02 [iNFO] [sTDERR] 	at java.util.ArrayList$Itr.checkForComodification(Unknown Source)
2012-10-11 14:44:02 [iNFO] [sTDERR] 	at java.util.ArrayList$Itr.next(Unknown Source)
2012-10-11 14:44:02 [iNFO] [sTDERR] 	at net.minecraft.src.Entity.moveEntity(Entity.java:680)
2012-10-11 14:44:02 [iNFO] [sTDERR] 	at MethyrClient.ParticleHD5.onUpdate(ParticleHD5.java:97)
2012-10-11 14:44:02 [iNFO] [sTDERR] 	at net.minecraft.src.EffectRenderer.updateEffects(EffectRenderer.java:67)
2012-10-11 14:44:02 [iNFO] [sTDERR] 	at net.minecraft.client.Minecraft.runTick(Minecraft.java:1800)
2012-10-11 14:44:02 [iNFO] [sTDERR] 	at net.minecraft.client.Minecraft.runGameLoop(Minecraft.java:843)
2012-10-11 14:44:02 [iNFO] [sTDERR] 	at net.minecraft.client.Minecraft.run(Minecraft.java:773)
2012-10-11 14:44:02 [iNFO] [sTDERR] 	at java.lang.Thread.run(Unknown Source)
2012-10-11 14:44:12 [iNFO] [sTDOUT] Stopping!

could somebody help me out?

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Make sure you're spawning particles only with the client thread! If you have to call this in the server thread (e.g. if the method is only executing on a server), then use packets to handle particle spawning.

To check if it's client side, check if world.isRemote == true.

 

BTW: Use Minecraft.getMinecraft() instead of ModLoader.getMinecraftInstance().

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This thread makes me sad because people just post copy-paste-ready code when it's obvious that the OP has little to no programming experience. This is not how learning works.

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well, i am already using the (world.isRemote) method, i'll try the minecraft thing but my package is in minecraft.common. maybe that's wrong? could you tell me which classes should be client sided and which classes should be server sided? because i also have a client sided package for rendering stuff like the particles

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nope that doesn't work either, i even get another error...:

2012-10-11 16:21:21 [iNFO] [sTDERR] java.util.ConcurrentModificationException
2012-10-11 16:21:21 [iNFO] [sTDERR] 	at java.util.ArrayList$Itr.checkForComodification(Unknown Source)
2012-10-11 16:21:21 [iNFO] [sTDERR] 	at java.util.ArrayList$Itr.next(Unknown Source)
2012-10-11 16:21:21 [iNFO] [sTDERR] 	at net.minecraft.src.Entity.moveEntity(Entity.java:680)
2012-10-11 16:21:21 [iNFO] [sTDERR] 	at net.minecraft.src.EntityLiving.moveEntityWithHeading(EntityLiving.java:1356)
2012-10-11 16:21:21 [iNFO] [sTDERR] 	at net.minecraft.src.EntityLiving.onLivingUpdate(EntityLiving.java:1578)
2012-10-11 16:21:21 [iNFO] [sTDERR] 	at net.minecraft.src.EntityAgeable.onLivingUpdate(EntityAgeable.java:59)
2012-10-11 16:21:21 [iNFO] [sTDERR] 	at net.minecraft.src.EntityAnimal.onLivingUpdate(EntityAnimal.java:40)
2012-10-11 16:21:21 [iNFO] [sTDERR] 	at net.minecraft.src.EntityLiving.onUpdate(EntityLiving.java:692)
2012-10-11 16:21:21 [iNFO] [sTDERR] 	at net.minecraft.src.World.updateEntityWithOptionalForce(World.java:2033)
2012-10-11 16:21:21 [iNFO] [sTDERR] 	at net.minecraft.src.WorldServer.updateEntityWithOptionalForce(WorldServer.java:538)
2012-10-11 16:21:21 [iNFO] [sTDERR] 	at net.minecraft.src.World.updateEntity(World.java:1998)
2012-10-11 16:21:21 [iNFO] [sTDERR] 	at net.minecraft.src.World.updateEntities(World.java:1879)
2012-10-11 16:21:21 [iNFO] [sTDERR] 	at net.minecraft.src.WorldServer.updateEntities(WorldServer.java:437)
2012-10-11 16:21:21 [iNFO] [sTDERR] 	at net.minecraft.server.MinecraftServer.updateTimeLightAndEntities(MinecraftServer.java:629)
2012-10-11 16:21:21 [iNFO] [sTDERR] 	at net.minecraft.server.MinecraftServer.tick(MinecraftServer.java:560)
2012-10-11 16:21:21 [iNFO] [sTDERR] 	at net.minecraft.src.IntegratedServer.tick(IntegratedServer.java:107)
2012-10-11 16:21:21 [iNFO] [sTDERR] 	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:466)
2012-10-11 16:21:21 [iNFO] [sTDERR] 	at net.minecraft.src.ThreadServerApplication.run(ThreadServerApplication.java:18)

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