org.bukkit.event.entity.EntityDamageEvent.DamageCause#PROJECTILE源码实例Demo

@EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
public void onDamageGet(EntityDamageEvent e) {
    if (e.getEntity() instanceof Player) {
        if (e.getCause() == DamageCause.LAVA) {
            Talisman.checkFor(e, SlimefunItems.TALISMAN_LAVA);
        }

        if (e.getCause() == DamageCause.DROWNING) {
            Talisman.checkFor(e, SlimefunItems.TALISMAN_WATER);
        }

        if (e.getCause() == DamageCause.FALL) {
            Talisman.checkFor(e, SlimefunItems.TALISMAN_ANGEL);
        }

        if (e.getCause() == DamageCause.FIRE) {
            Talisman.checkFor(e, SlimefunItems.TALISMAN_FIRE);
        }

        if (e.getCause() == DamageCause.ENTITY_ATTACK) {
            Talisman.checkFor(e, SlimefunItems.TALISMAN_KNIGHT);
            Talisman.checkFor(e, SlimefunItems.TALISMAN_WARRIOR);
        }

        if (e.getCause() == DamageCause.PROJECTILE && ((EntityDamageByEntityEvent) e).getDamager() instanceof Projectile) {
            Projectile projectile = (Projectile) ((EntityDamageByEntityEvent) e).getDamager();

            if (Talisman.checkFor(e, SlimefunItems.TALISMAN_WHIRLWIND)) {
                returnProjectile((Player) e.getEntity(), projectile);
            }
        }
    }
}
 

@EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
public void revealOnArrow(final EntityDamageByEntityEvent event) {
    if(event.getCause() == DamageCause.PROJECTILE && event.getDamager() instanceof Arrow && event.getEntity() instanceof Player) {
        this.reveal((Player) event.getEntity(), GhostSquadron.ARROW_REVEAL_DURATION);
    }
}
 

@Override
public boolean damageEntity(DamageSource source, float damage) {
    if(godmode || noDamageTicks > 0) {
        return false;
    }

    DamageCause cause = null;
    org.bukkit.entity.Entity bEntity = null;
    if(source instanceof EntityDamageSource) {
        Entity damager = source.getEntity();
        cause = DamageCause.ENTITY_ATTACK;
        if(source instanceof EntityDamageSourceIndirect) {
            damager = ((EntityDamageSourceIndirect) source).getProximateDamageSource();
            if(damager.getBukkitEntity() instanceof ThrownPotion) {
                cause = DamageCause.MAGIC;
            } else if(damager.getBukkitEntity() instanceof Projectile) {
                cause = DamageCause.PROJECTILE;
            }
        }

        bEntity = damager.getBukkitEntity();
    } else if(source == DamageSource.FIRE)
        cause = DamageCause.FIRE;
    else if(source == DamageSource.STARVE)
        cause = DamageCause.STARVATION;
    else if(source == DamageSource.WITHER)
        cause = DamageCause.WITHER;
    else if(source == DamageSource.STUCK)
        cause = DamageCause.SUFFOCATION;
    else if(source == DamageSource.DROWN)
        cause = DamageCause.DROWNING;
    else if(source == DamageSource.BURN)
        cause = DamageCause.FIRE_TICK;
    else if(source == CraftEventFactory.MELTING)
        cause = DamageCause.MELTING;
    else if(source == CraftEventFactory.POISON)
        cause = DamageCause.POISON;
    else if(source == DamageSource.MAGIC) {
        cause = DamageCause.MAGIC;
    } else if(source == DamageSource.OUT_OF_WORLD) {
        cause = DamageCause.VOID;
    }

    if(cause != null) {
        NPCDamageEvent event = new NPCDamageEvent(this, bEntity, cause, (double) damage);
        Bukkit.getPluginManager().callEvent(event);
        if(!event.isCancelled()) {
            return super.damageEntity(source, (float) event.getDamage());
        } else {
            return false;
        }
    }

    if(super.damageEntity(source, damage)) {
        if(bEntity != null) {
            Entity e = ((CraftEntity) bEntity).getHandle();
            double d0 = e.locX - this.locX;

            double d1;
            for(d1 = e.locZ - this.locZ; d0 * d0 + d1 * d1 < 0.0001D; d1 = (Math.random() - Math.random()) * 0.01D) {
                d0 = (Math.random() - Math.random()) * 0.01D;
            }

            a(e, damage, d0, d1);
        }

        return true;
    } else {
        return false;
    }
}