So I have a test file called Evilsand that just does this:

package missing.abyssalcore.common.blocks;

import cpw.mods.fml.common.eventhandler.SubscribeEvent;
import net.minecraft.block.BlockSand;
import net.minecraft.block.material.Material;
import net.minecraft.init.Blocks;
import net.minecraft.item.Item;
import net.minecraftforge.event.world.BlockEvent;
import net.minecraftforge.event.world.BlockEvent.BreakEvent;
import net.minecraftforge.event.entity.player.*;
import net.minecraft.util.ChatComponentText;

public class Evilsand {
	@SubscribeEvent
	public void Evil(PlayerInteractEvent event) {
		System.out.println("Test");
		System.out.println(event);
	}
	@SubscribeEvent
	public void aaa(BreakEvent event) {
		if (event.block == Blocks.sand) {
			System.out.println("Breaktest");
			System.out.println(event);
		}
	}
}

When I compile my mod, nothing happens on these events. I'm assuming that it's just because it's not being called/ initialized in my main mod file:
 

package missing.abyssalcore.common;

import net.minecraft.init.Blocks;
import cpw.mods.fml.common.Mod;
import cpw.mods.fml.common.Mod.EventHandler;
import cpw.mods.fml.common.event.FMLPostInitializationEvent;
import cpw.mods.fml.common.event.FMLPreInitializationEvent;
import cpw.mods.fml.common.event.FMLInitializationEvent;
import missing.abyssalcore.common.blocks.Evilsand;

@Mod(modid = Abyssalcore.MODID, version = Abyssalcore.VERSION)
public class Abyssalcore
{
    public static final String MODID = "Abyssalcore";
    public static final String VERSION = "1.1";
    @EventHandler
	public void preInit(FMLPreInitializationEvent event) {
    	//preinit
    }
    @EventHandler
    public void init(FMLInitializationEvent event){
		// some example code
        //System.out.println("DIRT BLOCK >> "+Blocks.dirt.getUnlocalizedName());
    }
    public void postInit(FMLPostInitializationEvent event) {
    	//postinit
    }
}

So my question is this: exactly in what part of the initialization process do I load in classes like this? It's a little more obvious more stuff like blocks and items and whatnot, but I'm not sure where/how to initialize my Evilsand class in the process.

21 minutes ago, Uhoh said:

It's a little more obvious more stuff like blocks and items and whatnot

Assuming you mean the RegistryEvents meant for those specific types...

21 minutes ago, Uhoh said:

but I'm not sure where/how to initialize my Evilsand class in the process.

If you put the @EvenBusSubscriber annotation on your class and make the methods static it will register the events or you could just put MinecraftForge.EVENT_BUS.register(newInstanceOfEventClass) in any of the events in your @Mod file.

Oh, I see. Actually testing the mod, I have another question: it seems that PlayerInteractEvent does not, like I hoped, encompass the event of the player standing on a block. If that's the case, then what does? I'm looking through Vic's list of Forge events and I don't see anything that seems to address player/entity block collision.

For something like checking whether player is standing on a block, you can handle the PlayerTickEvent and just check the block under the Player at that time. Basically there are a number of "tick" events which are useful for applying behavior that may not have an event. These give you a chance every tick (1/20 second) to run whatever code you want (like scanning inventory for specific items, scanning surrounding for certain terrain elements, and similar).

Yep, that would do it. Thank you!

Hmm, actually, I have another question, sorry- I changed my script so that it attempts to damage the player by 10% of their current health when they're standing on sand, but it doesn't seem to be doing anything:

package missing.abyssalcore.common.blocks;

import cpw.mods.fml.common.eventhandler.SubscribeEvent;
import cpw.mods.fml.common.gameevent.TickEvent.PlayerTickEvent;
import net.minecraft.block.Block;
import net.minecraft.block.BlockSand;
import net.minecraft.block.material.Material;
import net.minecraft.entity.Entity;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.init.Blocks;
import net.minecraft.item.Item;
import net.minecraftforge.event.world.BlockEvent;
import net.minecraftforge.event.world.BlockEvent.BreakEvent;
import net.minecraftforge.event.entity.player.*;
import net.minecraft.util.MathHelper;

public class Evilsand {
	//thanks to jabelar for code
	public Block findBlockUnderEntity(Entity parEntity)
	{
	    int blockX = MathHelper.floor_double(parEntity.posX);
	    int blockY = MathHelper.floor_double(parEntity.boundingBox.minY)-1;
	    int blockZ = MathHelper.floor_double(parEntity.posZ);
	    return parEntity.worldObj.getBlock(blockX, blockY, blockZ);
	}
	@SubscribeEvent
	public void Evil(PlayerTickEvent event) {
		if (event.player instanceof EntityPlayer) {
			//assign player to player entity
			EntityPlayer player = (EntityPlayer) event.player;
			Block newblock = findBlockUnderEntity(player);
			if (newblock == Blocks.sand) {
				float health = (float) (player.getHealth() * 0.9);
				player.setHealth(health);
				System.out.println("Oof");
			}
		}
	}
}

Any ideas why? Should I have defined the findBlockUnderEntity method elsewhere, or is my problem someplace else?

14 minutes ago, Uhoh said:

Any ideas why?

Did you register the event class as I said above?

 

14 minutes ago, Uhoh said:

Should I have defined the findBlockUnderEntity method elsewhere, or is my problem someplace else?

It doesn't matter where you define it.

Yeah, I did, and it worked before I added the changes to the Evilsand class. For reference:

package missing.abyssalcore.common;

import net.minecraft.init.Blocks;
import net.minecraftforge.common.MinecraftForge;
import cpw.mods.fml.common.Mod;
import cpw.mods.fml.common.Mod.EventHandler;
import cpw.mods.fml.common.event.FMLPostInitializationEvent;
import cpw.mods.fml.common.event.FMLPreInitializationEvent;
import cpw.mods.fml.common.event.FMLInitializationEvent;
import missing.abyssalcore.common.blocks.Evilsand;

@Mod(modid = Abyssalcore.MODID, version = Abyssalcore.VERSION)
public class Abyssalcore
{
    public static final String MODID = "Abyssalcore";
    public static final String VERSION = "1.1";
    @EventHandler
	public void preInit(FMLPreInitializationEvent event) {
    	//preinit
    }
    @EventHandler
    public void init(FMLInitializationEvent event){
    	//register evilsand
    	MinecraftForge.EVENT_BUS.register(new Evilsand());
    }
    public void postInit(FMLPostInitializationEvent event) {
    	//postinit
    }
}

 

Edited October 15, 20187 yr by Uhoh

1 hour ago, Uhoh said:

if (newblock == Blocks.sand) {

did you mean Blocks.SAND? What version are you modding on?

1 hour ago, Uhoh said:

return parEntity.worldObj.getBlock(blockX, blockY, blockZ);

We don't support modding on versions below 1.9

12 hours ago, Uhoh said:

int blockY = MathHelper.floor_double(parEntity.boundingBox.minY)-1;

This isn't the correct value, the player has a posY field.

Also: subtracting 1 does not neccessarily return the block the player is standing on (e.g. carpet, pressure plates, half slabs, enter frames, etc). In fact, such an operation is the source of a long-standing vanilla bug.