Player.java

public void attack(Entity pTarget) {
        if (CommonHooks.onPlayerAttackTarget(this, pTarget)) {
            if (pTarget.isAttackable() && !pTarget.skipAttackInteraction(this)) {
                float f = (float)this.getAttributeValue(Attributes.ATTACK_DAMAGE);
                float f1;
                if (pTarget instanceof LivingEntity) {
                    f1 = EnchantmentHelper.getDamageBonus(this.getMainHandItem(), ((LivingEntity)pTarget).getMobType());
                } else {
                    f1 = EnchantmentHelper.getDamageBonus(this.getMainHandItem(), MobType.UNDEFINED);
                }

                float f2 = this.getAttackStrengthScale(0.5F);
                f *= 0.2F + f2 * f2 * 0.8F;
                f1 *= f2;
                if (f > 0.0F || f1 > 0.0F) {
                    boolean flag = f2 > 0.9F;
                    boolean flag1 = false;
                    float i = (float)this.getAttributeValue(Attributes.ATTACK_KNOCKBACK);
                    i += (float)EnchantmentHelper.getKnockbackBonus(this);
                    if (this.isSprinting() && flag) {
                        this.level().playSound((Player)null, this.getX(), this.getY(), this.getZ(), SoundEvents.PLAYER_ATTACK_KNOCKBACK, this.getSoundSource(), 1.0F, 1.0F);
                        ++i;
                        flag1 = true;
                    }

                    boolean flag2 = flag && this.fallDistance > 0.0F && !this.onGround() && !this.onClimbable() && !this.isInWater() && !this.hasEffect(MobEffects.BLINDNESS) && !this.isPassenger() && pTarget instanceof LivingEntity;
                    flag2 = flag2 && !this.isSprinting();
                    CriticalHitEvent hitResult = CommonHooks.getCriticalHit(this, pTarget, flag2, flag2 ? 1.5F : 1.0F);
                    flag2 = hitResult != null;
                    if (flag2) {
                        f *= hitResult.getDamageModifier();
                    }

                    f += f1;
                    boolean flag3 = false;
                    double d0 = (double)(this.walkDist - this.walkDistO);
                    if (flag && !flag2 && !flag1 && this.onGround() && d0 < (double)this.getSpeed()) {
                        ItemStack itemstack = this.getItemInHand(InteractionHand.MAIN_HAND);
                        flag3 = itemstack.canPerformAction(ToolActions.SWORD_SWEEP);
                    }

                    float f4 = 0.0F;
                    boolean flag4 = false;
                    int j = EnchantmentHelper.getFireAspect(this);
                    if (pTarget instanceof LivingEntity) {
                        f4 = ((LivingEntity)pTarget).getHealth();
                        if (j > 0 && !pTarget.isOnFire()) {
                            flag4 = true;
                            pTarget.setSecondsOnFire(1);
                        }
                    }

                    Vec3 vec3 = pTarget.getDeltaMovement();
                    boolean flag5 = pTarget.hurt(this.damageSources().playerAttack(this), f);
                    if (flag5) {
                        if (i > 0.0F) {
                            if (pTarget instanceof LivingEntity) {
                                ((LivingEntity)pTarget).knockback((double)(i * 0.5F), (double)Mth.sin(this.getYRot() * 0.017453292F), (double)(-Mth.cos(this.getYRot() * 0.017453292F)));
                            } else {
                                pTarget.push((double)(-Mth.sin(this.getYRot() * 0.017453292F) * i * 0.5F), 0.1, (double)(Mth.cos(this.getYRot() * 0.017453292F) * i * 0.5F));
                            }

                            this.setDeltaMovement(this.getDeltaMovement().multiply(0.6, 1.0, 0.6));
                            this.setSprinting(false);
                        }

                        if (flag3) {
                            float f3 = 1.0F + EnchantmentHelper.getSweepingDamageRatio(this) * f;
                            Iterator var19 = this.level().getEntitiesOfClass(LivingEntity.class, pTarget.getBoundingBox().inflate(1.0, 0.25, 1.0)).iterator();

                            label173:
                            while(true) {
                                LivingEntity livingentity;
                                double entityReachSq;
                                do {
                                    do {
                                        do {
                                            do {
                                                if (!var19.hasNext()) {
                                                    this.level().playSound((Player)null, this.getX(), this.getY(), this.getZ(), SoundEvents.PLAYER_ATTACK_SWEEP, this.getSoundSource(), 1.0F, 1.0F);
                                                    this.sweepAttack();
                                                    break label173;
                                                }

                                                livingentity = (LivingEntity)var19.next();
                                                entityReachSq = Mth.square(this.getEntityReach());
                                            } while(livingentity == this);
                                        } while(livingentity == pTarget);
                                    } while(this.isAlliedTo(livingentity));
                                } while(livingentity instanceof ArmorStand && ((ArmorStand)livingentity).isMarker());

                                if (this.distanceToSqr(livingentity) < entityReachSq) {
                                    livingentity.knockback(0.4000000059604645, (double)Mth.sin(this.getYRot() * 0.017453292F), (double)(-Mth.cos(this.getYRot() * 0.017453292F)));
                                    livingentity.hurt(this.damageSources().playerAttack(this), f3);
                                }
                            }
                        }

                        if (pTarget instanceof ServerPlayer && pTarget.hurtMarked) {
                            ((ServerPlayer)pTarget).connection.send(new ClientboundSetEntityMotionPacket(pTarget));
                            pTarget.hurtMarked = false;
                            pTarget.setDeltaMovement(vec3);
                        }

                        if (flag2) {
                            this.level().playSound((Player)null, this.getX(), this.getY(), this.getZ(), SoundEvents.PLAYER_ATTACK_CRIT, this.getSoundSource(), 1.0F, 1.0F);
                            this.crit(pTarget);
                        }

                        if (!flag2 && !flag3) {
                            if (flag) {
                                this.level().playSound((Player)null, this.getX(), this.getY(), this.getZ(), SoundEvents.PLAYER_ATTACK_STRONG, this.getSoundSource(), 1.0F, 1.0F);
                            } else {
                                this.level().playSound((Player)null, this.getX(), this.getY(), this.getZ(), SoundEvents.PLAYER_ATTACK_WEAK, this.getSoundSource(), 1.0F, 1.0F);
                            }
                        }

                        if (f1 > 0.0F) {
                            this.magicCrit(pTarget);
                        }

                        this.setLastHurtMob(pTarget);
                        if (pTarget instanceof LivingEntity) {
                            EnchantmentHelper.doPostHurtEffects((LivingEntity)pTarget, this);
                        }

                        EnchantmentHelper.doPostDamageEffects(this, pTarget);
                        ItemStack itemstack1 = this.getMainHandItem();
                        Entity entity = pTarget;
                        if (pTarget instanceof PartEntity) {
                            entity = ((PartEntity)pTarget).getParent();
                        }

                        if (!this.level().isClientSide && !itemstack1.isEmpty() && entity instanceof LivingEntity) {
                            ItemStack copy = itemstack1.copy();
                            itemstack1.hurtEnemy((LivingEntity)entity, this);
                            if (itemstack1.isEmpty()) {
                                EventHooks.onPlayerDestroyItem(this, copy, InteractionHand.MAIN_HAND);
                                this.setItemInHand(InteractionHand.MAIN_HAND, ItemStack.EMPTY);
                            }
                        }

                        if (pTarget instanceof LivingEntity) {
                            float f5 = f4 - ((LivingEntity)pTarget).getHealth();
                            this.awardStat(Stats.DAMAGE_DEALT, Math.round(f5 * 10.0F));
                            if (j > 0) {
                                pTarget.setSecondsOnFire(j * 4);
                            }

                            if (this.level() instanceof ServerLevel && f5 > 2.0F) {
                                int k = (int)((double)f5 * 0.5);
                                ((ServerLevel)this.level()).sendParticles(ParticleTypes.DAMAGE_INDICATOR, pTarget.getX(), pTarget.getY(0.5), pTarget.getZ(), k, 0.1, 0.0, 0.1, 0.2);
                            }
                        }

                        this.causeFoodExhaustion(0.1F);
                    } else {
                        this.level().playSound((Player)null, this.getX(), this.getY(), this.getZ(), SoundEvents.PLAYER_ATTACK_NODAMAGE, this.getSoundSource(), 1.0F, 1.0F);
                        if (flag4) {
                            pTarget.clearFire();
                        }
                    }
                }

                this.resetAttackStrengthTicker();
            }

        }
    }