I'm using a tutorial to make a gun in 1.8, but I think some of the calls are from an older version. What should I use instead for lines 38 and 49?

 

Line 38: "getBlock(int, int, int) is undefined for Type World", "getBlockMetadata(int, int, int) is undefined for Type World", "SetBlocktoAir(Blockpos) is not applicable to the arguments (int, int, int)",  "The Method SetBlock is undefined by the Type World".

 

Line 49: spawnParticle is apparently not applicable to the arguments it lists.

 

 

package raebit.tutorial.inherited;

import net.minecraft.block.Block;
import net.minecraft.block.BlockRedstoneDiode;
import net.minecraft.entity.EntityLivingBase;
import net.minecraft.entity.projectile.EntityThrowable;
import net.minecraft.init.Blocks;
import net.minecraft.util.BlockPos;
import net.minecraft.util.MovingObjectPosition;
import net.minecraft.world.World;

public class EntityEMP extends EntityThrowable 
{
public static final float explosionPower = 0.75F;
public static final int empRadius = 4;

public EntityEMP(World world)
{
super(world);
}

public EntityEMP(World world, EntityLivingBase entity)
{
super(world, entity);
}

private void explode()
{	
int bx = (int)posX;
int by = (int)posY;
int bz = (int)posZ;
worldObj.createExplosion(this, posX, posY, posZ, (float) 0.75, true);

for (int x = bx - empRadius; x <= empRadius; x++)
{
for (int y = by - empRadius; y <= by + empRadius; y++)
{
for (int z = bz - empRadius; z <= bz + empRadius; z++) { Block block = worldObj.getBlock(x, y, z); if (block == Blocks.redstone_wire || block instanceof BlockRedstoneDiode) { block.dropBlockAsItem(worldObj, x, y, z, worldObj.getBlockMetadata(x, y, z), 0); worldObj.setBlockToAir(x, y, z); } if (block == Blocks.redstone_block) { worldObj.setBlock(x, y, z, Blocks.stone); } } } } setDead(); } @Override public void onUpdate() { super.onUpdate(); if (ticksExisted > 20)
{
explode();
}

for (int i = 0; i < 10; i++)
{
super.onUpdate();
double x = (double)(rand.nextInt(10) - 5) / 8.0D;
double y = (double)(rand.nextInt(10) - 5) / 8.0D;
double z = (double)(rand.nextInt(10) - 5) / 8.0D;
worldObj.spawnParticle("fireworksSpark", posX, posY, posZ, x, y, z);
}
}	

@Override
protected float getGravityVelocity()
{
return 0.005F;
}

@Override
public void onImpact(MovingObjectPosition movingObjectPosition)
{
explode();
}
}

In 1.8 x/y/z are wrapped into BlockPos - you can just make new BlockPos(x, y, z).

Seriously - just look at literally any part of vanilla code, it's everywhere.

Same goes for particles - look at e.g TNT primed.