minecraft-kajetans-mod/src/main/java/me/km/effects/active/BlockExplosion.java

package me.km.effects.active;

import me.km.KajetansMod;
import me.km.effects.ActiveEffectBase;
import me.km.effects.EffectAirBlockChanger;
import me.km.effects.EffectUtils;
import net.minecraft.entity.item.EntityItem;
import net.minecraft.entity.player.EntityPlayerMP;
import net.minecraft.init.Blocks;
import net.minecraft.item.ItemStack;
import net.minecraft.util.EnumParticleTypes;
import net.minecraft.util.math.BlockPos;
import net.minecraft.world.WorldServer;

public class BlockExplosion extends ActiveEffectBase
{
    @Override
    protected boolean executeEffect(EntityPlayerMP p, int power) 
    {
        WorldServer w = p.getServerWorld();
        EntityItem item = new EntityItem(w, p.posX, p.posY, p.posZ, new ItemStack(Blocks.TNT));
        item.setInfinitePickupDelay();
        w.spawnEntity(item);
        
        BlockPos mid = p.getPosition();
        EffectAirBlockChanger e = new EffectAirBlockChanger(w);

        power = Math.max(0, Math.min(power, 6));
        int radius2 = power * power;
        for(int x = -power; x <= power; x++)
        {
            for(int y = -power; y <= power; y++)
            {
                for(int z = -power; z <= power; z++)
                {
                    if(x * x + y * y + z * z <= radius2)
                    {
                        e.addBlock(mid.add(x, y, z));
                    }
                }
            }
        }
        
        KajetansMod.scheduler.scheduleTask(() -> 
        {
            item.setDead();
            EffectUtils.spawnParticle(w, EnumParticleTypes.EXPLOSION_LARGE, item, 1);
            e.run(300);
        }, 60);
        
        return true;
    }
}