onUpdate

/**
     * Called to update the entity's position/logic.
     */
    public void onUpdate()
    {
        super.onUpdate();

        if (!this.worldObj.isRemote)
        {
            int i = this.getArrowCountInEntity();

            if (i > 0)
            {
                if (this.arrowHitTimer <= 0)
                {
                    this.arrowHitTimer = 20 * (30 - i);
                }

                --this.arrowHitTimer;

                if (this.arrowHitTimer <= 0)
                {
                    this.setArrowCountInEntity(i - 1);
                }
            }

            for (int j = 0; j < 5; ++j)
            {
                ItemStack itemstack = this.previousEquipment[j];
                ItemStack itemstack1 = this.getEquipmentInSlot(j);

                if (!ItemStack.areItemStacksEqual(itemstack1, itemstack))
                {
                    ((WorldServer)this.worldObj).getEntityTracker().sendToAllTrackingEntity(this, new S04PacketEntityEquipment(this.getEntityId(), j, itemstack1));

                    if (itemstack != null)
                    {
                        this.attributeMap.removeAttributeModifiers(itemstack.getAttributeModifiers());
                    }

                    if (itemstack1 != null)
                    {
                        this.attributeMap.applyAttributeModifiers(itemstack1.getAttributeModifiers());
                    }

                    this.previousEquipment[j] = itemstack1 == null ? null : itemstack1.copy();
                }
            }

            if (this.ticksExisted % 20 == 0)
            {
                this.getCombatTracker().reset();
            }
        }

        this.onLivingUpdate();
        double deltaX = this.posX - this.prevPosX;
        double deltaZ = this.posZ - this.prevPosZ;
        float distance = (float) (deltaX * deltaX + deltaZ * deltaZ);
        float yawHead = rotationYawHead;
        if(this == Minecraft.getMinecraft().thePlayer)
            yawHead = PlayerHandler.yaw;
        float offset = renderYawOffset;

        float f2 = 0.0F;
        this.prevOnGroundSpeedFactor = this.onGroundSpeedFactor;
        float f3 = 0.0F;

        if (distance > 0.0025000002F)
            offset = (float) MathHelper.func_181159_b(deltaZ, deltaX) * 180.0F / (float) Math.PI - 90.0F;

        if (this.swingProgress > 0.0F)
            offset = yawHead;

        if (!this.onGround) {
            f3 = 0.0F;
        }

        this.onGroundSpeedFactor += (f3 - this.onGroundSpeedFactor) * 0.3F;
        this.worldObj.theProfiler.startSection("headTurn");
        f2 = this.func_110146_f(offset, f2);
        this.worldObj.theProfiler.endSection();
        this.worldObj.theProfiler.startSection("rangeChecks");

        while (this.rotationYaw - this.prevRotationYaw < -180.0F) {
            this.prevRotationYaw -= 360.0F;
        }

        while (this.rotationYaw - this.prevRotationYaw >= 180.0F) {
            this.prevRotationYaw += 360.0F;
        }

        while (this.renderYawOffset - this.prevRenderYawOffset < -180.0F) {
            this.prevRenderYawOffset -= 360.0F;
        }

        while (this.renderYawOffset - this.prevRenderYawOffset >= 180.0F) {
            this.prevRenderYawOffset += 360.0F;
        }

        while (this.rotationPitch - this.prevRotationPitch < -180.0F) {
            this.prevRotationPitch -= 360.0F;
        }

        while (this.rotationPitch - this.prevRotationPitch >= 180.0F) {
            this.prevRotationPitch += 360.0F;
        }

        while (this.rotationYawHead - this.prevRotationYawHead < -180.0F) {
            this.prevRotationYawHead -= 360.0F;
        }

        while (this.rotationYawHead - this.prevRotationYawHead >= 180.0F) {
            this.prevRotationYawHead += 360.0F;
        }

        this.worldObj.theProfiler.endSection();
        this.movedDistance += f2;
    }