Replace an block

[agowa338]

I want to change the behavior of the farmland block. So I've made a simple block, that extends it.

Bevore 1.7 I've used

Block.blocksList[FarmlandBlockID] = null;
Block newfarmland = (new BlockFarmlandNew(FarmlandBlockID)).setUnlocalizedName("farmland").setTextureName("farmland");
GameRegistry.registerBlock(newfarmland, "farmland");

but blocksList was removed, does anybody know another way to remove an registred block?

[Busti]

Item and Block mappings are stored in the GameData class.

You can get a block mapping by using the GameData.blockRegistry.get("NAME"); command but there is no real method to easily remove that entry. You could try using the itreator of the map but I have not tried that.

[agowa338]

I now found another way to change the Block.

What I did for that was to create a new event called UseHoe and recoded the part where the dirt block is swapped with the farmland but I had to do that without par7 (so I did "int par7 =1") from onItemUse (net.minecraft.item.ItemHoe).

Inside that event I swapped the Line

Block block1 = Block.farmland;

with

Block block1 = (Block)Block.blockRegistry.getObject("BetterFarmLand:BlockFarmLandNew");

 

Does anybody know what par7 is used for?

 

 

__________________________

What I have also tryed was a reflektion of

public static final Block farmland = (Block)Block.blockRegistry.getObject("farmland");

to

public static final Block farmland = (Block)Block.blockRegistry.getObject("BetterFarmLand:BlockFarmLandNew");

 

Then I was seeing, that the blocks were swapped but there was no difference in the game, but (System.out.println showed me that the Block farmland was BlockFarmLandNew)

Does anybody have any idea?

[f1rSt1kChannel]

Create class:

public class BlockReplaceHelper{
public static boolean replaceBlock(Block toReplace, Class<? extends Block> blockClass){
	Field modifiersField=null;
    	try{
    		modifiersField=Field.class.getDeclaredField("modifiers");
    		modifiersField.setAccessible(true);
    		
    		for(Field field:Blocks.class.getDeclaredFields()){
        		if (Block.class.isAssignableFrom(field.getType())){
    				Block block=(Block)field.get(null);
    				if (block==toReplace){
    					String registryName=Block.blockRegistry.getNameForObject(block);
    					int id=Block.getIdFromBlock(block);
    					ItemBlock item=(ItemBlock)Item.getItemFromBlock(block);
    					System.out.println("Replacing block - "+id+"/"+registryName);
    					
    					Block newBlock=blockClass.newInstance();
    					FMLControlledNamespacedRegistry<Block> registry=GameData.blockRegistry;
    					registry.putObject(registryName,newBlock);
    					
    					Field map=RegistryNamespaced.class.getDeclaredFields()[0];
    					map.setAccessible(true);
    					((ObjectIntIdentityMap)map.get(registry)).func_148746_a(newBlock,id);
    					
    					map=FMLControlledNamespacedRegistry.class.getDeclaredField("namedIds");
    					map.setAccessible(true);
    					((BiMap)map.get(registry)).put(registryName,id);
    					
    					field.setAccessible(true);
    					int modifiers=modifiersField.getInt(field);
    					modifiers&=~Modifier.FINAL;
    					modifiersField.setInt(field,modifiers);
    					field.set(null,newBlock);
    					
    					Field itemblock=ItemBlock.class.getDeclaredFields()[0];
    					itemblock.setAccessible(true);
    					modifiers=modifiersField.getInt(itemblock);
    					modifiers&=~Modifier.FINAL;
    					modifiersField.setInt(itemblock,modifiers);
    					itemblock.set(item,newBlock);
    					
    					System.out.println("Check field: "+field.get(null).getClass());
    					System.out.println("Check registry: "+Block.blockRegistry.getObjectById(id).getClass());
    					System.out.println("Check item: "+((ItemBlock)Item.getItemFromBlock(newBlock)).field_150939_a.getClass());
    				}
        		}
        	}
    	}catch(Exception e){
    		e.printStackTrace();
    		return false;
    	}
    	return true;
}
}

And BlockReplaceHelper.replaceBlock(Block.farmLand, NewFarmLand.class)