public void moveEntityWithHeading(float strafe, float forward)
    {
        if (this.isServerWorld())
        {
            if (!this.isInWater() || this instanceof EntityPlayer && ((EntityPlayer)this).capabilities.isFlying)
            {
                if (!this.isInLava() || this instanceof EntityPlayer && ((EntityPlayer)this).capabilities.isFlying)
                {
                    float f4 = 0.91F;

                    if (this.onGround)
                    {
                        f4 = this.worldObj.getBlockState(new BlockPos(MathHelper.floor_double(this.posX), MathHelper.floor_double(this.getEntityBoundingBox().minY) - 1, MathHelper.floor_double(this.posZ))).getBlock().slipperiness * 0.91F;
                    }

                    float f = 0.16277136F / (f4 * f4 * f4);
                    float f5;

                    if (this.onGround)
                    {
                        f5 = this.getAIMoveSpeed() * f;
                    }
                    else
                    {
                        f5 = this.jumpMovementFactor;
                    }

                    this.moveFlying(strafe, forward, f5);
                    f4 = 0.91F;

                    if (this.onGround)
                    {
                        f4 = this.worldObj.getBlockState(new BlockPos(MathHelper.floor_double(this.posX), MathHelper.floor_double(this.getEntityBoundingBox().minY) - 1, MathHelper.floor_double(this.posZ))).getBlock().slipperiness * 0.91F;
                    }

                    if (this.isOnLadder())
                    {
                        float f6 = 0.15F;
                        this.motionX = MathHelper.clamp_double(this.motionX, (double)(-f6), (double)f6);
                        this.motionZ = MathHelper.clamp_double(this.motionZ, (double)(-f6), (double)f6);
                        this.fallDistance = 0.0F;

                        if (this.motionY < -0.15D)
                        {
                            this.motionY = -0.15D;
                        }

                        boolean flag = this.isSneaking() && this instanceof EntityPlayer;

                        if (flag && this.motionY < 0.0D)
                        {
                            this.motionY = 0.0D;
                        }
                    }

                    this.moveEntity(this.motionX, this.motionY, this.motionZ);

                    if (this.isCollidedHorizontally && this.isOnLadder())
                    {
                        this.motionY = 0.2D;
                    }

                    if (this.worldObj.isRemote && (!this.worldObj.isBlockLoaded(new BlockPos((int)this.posX, 0, (int)this.posZ)) || !this.worldObj.getChunkFromBlockCoords(new BlockPos((int)this.posX, 0, (int)this.posZ)).isLoaded()))
                    {
                        if (this.posY > 0.0D)
                        {
                            this.motionY = -0.1D;
                        }
                        else
                        {
                            this.motionY = 0.0D;
                        }
                    }
                    else
                    {
                        this.motionY -= 0.08D;
                    }

                    this.motionY *= 0.9800000190734863D;
                    this.motionX *= (double)f4;
                    this.motionZ *= (double)f4;
                }
                else
                {
                    double d1 = this.posY;
                    this.moveFlying(strafe, forward, 0.02F);
                    this.moveEntity(this.motionX, this.motionY, this.motionZ);
                    this.motionX *= 0.5D;
                    this.motionY *= 0.5D;
                    this.motionZ *= 0.5D;
                    this.motionY -= 0.02D;

                    if (this.isCollidedHorizontally && this.isOffsetPositionInLiquid(this.motionX, this.motionY + 0.6000000238418579D - this.posY + d1, this.motionZ))
                    {
                        this.motionY = 0.30000001192092896D;
                    }
                }
            }
            else
            {
                double d0 = this.posY;
                float f1 = 0.8F;
                float f2 = 0.02F;
                float f3 = (float)EnchantmentHelper.getDepthStriderModifier(this);

                if (f3 > 3.0F)
                {
                    f3 = 3.0F;
                }

                if (!this.onGround)
                {
                    f3 *= 0.5F;
                }

                if (f3 > 0.0F)
                {
                    f1 += (0.54600006F - f1) * f3 / 3.0F;
                    f2 += (this.getAIMoveSpeed() * 1.0F - f2) * f3 / 3.0F;
                }

                this.moveFlying(strafe, forward, f2);
                this.moveEntity(this.motionX, this.motionY, this.motionZ);
                this.motionX *= (double)f1;
                this.motionY *= 0.800000011920929D;
                this.motionZ *= (double)f1;
                this.motionY -= 0.02D;

                if (this.isCollidedHorizontally && this.isOffsetPositionInLiquid(this.motionX, this.motionY + 0.6000000238418579D - this.posY + d0, this.motionZ))
                {
                    this.motionY = 0.30000001192092896D;
                }
            }
        }

        this.prevLimbSwingAmount = this.limbSwingAmount;
        double d2 = this.posX - this.prevPosX;
        double d3 = this.posZ - this.prevPosZ;
        float f7 = MathHelper.sqrt_double(d2 * d2 + d3 * d3) * 4.0F;

        if (f7 > 1.0F)
        {
            f7 = 1.0F;
        }

        this.limbSwingAmount += (f7 - this.limbSwingAmount) * 0.4F;
        this.limbSwing += this.limbSwingAmount;
    }

    /**
     * the movespeed used for the new AI system
     */
    public float getAIMoveSpeed()
    {
        return this.landMovementFactor;
    }