Category: News

Test Your Add-Ons Now!

X-Plane 940 beta 7 is out. Now is the time to test your airplanes, scenery, and plugins. We’ve reached a point where we think we have the new systems code working. Please try the new beta, test your add-ons, and if something works in 930 but is broken in 940, file a bug immediately!

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Driver Thrash

I’m seeing a number of bug reports where weird artifacts are showing up in 940…missing pieces of runway, flickering triangles…all sorts of good stuff!

I believe that this is due to some kind of bug relating to threading, X-Plane and the video drivers. I won’t say whose fault it is because I really don’t know. I do know that the bug appears to not happen on OS X. (But this could simply be because the threads time out differently on OS X.)

The changes to the rendering engine for 940 from 930 are substantial and aggressive – it’ll take us a little bit to fix these things.

When you wonder how come programs don’t use all 8 of your cores yet, well…this is why…multi-core programming is complex, tricky, tedious to debug, and often involves substantial changes from the original code.

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I am the Spam King!

If I have not emailed you back, it’s probably because I’ve been very busy trying to interleave X-Plane coding and packing up the house. But it is also possible that my email response bounced because my web server has ended up on a bunch of anti-spam “black-lists”.

Black-listing seems like a good idea at first: we’ll gather up a list of all of the IP addresses from which spam comes from, then publish them. Then your local mail server can use that list to filter spam – you never see it!

In practice it doesn’t work so well…example: http://www.mipspace.com/. The IP address for my server (XSquawkBox) is now on this list. Why?

MIPSpace is a list of IP Addresses associated with known commercial marketing companies.

Since my server is used for my own personal email and to run the SDK website, I’m not sure why I am on the list. I have sent them an email to clear things, but in general I hit an anti-spam/black-list bounce somewhat frequently now, and frankly I don’t have time to separately try to clear my name from every guilty-until-proven-innocent blacklist that pops up and screws up my email.

If I seem disproportionately grumpy about this, it could be due to one of two reasons:

  1. Not replying to emails is generally bad customer service. (Okay, my in-box is backed up four months…that’s bad.) I don’t like the idea that a customer might perceive us (LR) as being unresponsive because some third party with no skin in the game decides to black-list us.

    The blacklist has no incentive to be accurate – it’s not their lost customers if email doesn’t go through.

  2. I’m not at all convinced that this is going to cut down unsolicited commercial mail and/or spam.

    In the spam case, spammers can send from botnets – they have access to a huge number of ever-changing IPs. Unless we are prepared to blacklist the entire internet, the blacklists are going to pick up more and more false positives while spammers find ways to harvest fresh, untainted IP addresses. The whole IP-reputation strategy assumes that IPs are hard to change. In practice, IPs are very, very easy to change.

    Commercial mail is a lost cause too – even if I am being solicited for commercial mail I don’t want, no program or automatic process is ever going to tell the difference between the confirmation of my invoice and a list of discounts from the same company. When it comes to commercial mail, the reputation damage has to be done to the company, not the IP.

    (The company does have reputation to risk – if we are known as a company that doesn’t honnor a “do not subscribe” policy, then customers can choose to not buy our products.)

It could also be because I ran out of Viagra and don’t have a diploma from a prestigious non-acredited university.

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Switch and Bail

I will be out of the office next week – it’s August, time to head for the mountains…no cell coverage, no internet, no computers, no electricity…no mountains actually. (This is upstate New York…mountainous to someone from Boston but not mountains compared to what Sergio normally deals with.)

As you know, LR often shows stellar judgement in managing release risk. So in true X-Plane tradition, I swapped in the new revamped website last night, just in time to head for the hills and avoid the fall-out.

Here’s the short version:

  • I am wicked stupid.
  • When I did the swap last night, I screwed up the files that manage the auto-update functionality, hosing the updater.
  • I fixed these files this afternoon, once the message got back to me.

So if you saw weird stuff happen with the updater or the sim last night, please try again – it should be fixed. If it is still broken, please send an email to Austin and myself – one of us will hopefully be around.

I have also reskinned scenery.x-plane.com and wiki.x-plane.com to match the new site. If you find artifacts in those two sub-sites, please email me – I’ll fix it as soon as I can. The wiki site is a MediaWiki skin – it was pretty tricky to get it working, so it may be a bit before I work all the kinks out.

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Broken Materials in 931

There is a bug in the newly released 931. When:

  • Clouds are set to stratus and
  • Pixel shaders are on and
  • The airplane has an OBJ that uses ATTR_diffuse_rgb

the attribute is ignored, which typically makes things appear white. The primary example that has been reported to me is the throttle quadrant of the Piper Malibu.

This is simply a bug in the shaders (which is failing to apply the diffuse tinting to ambient-only lighting conditions); I have a fix, but I’m not sure how soon it will be released. We will probably do a small bug-fix release with this and one or two other things, but this is yet to be finalized, since Austin is out of the office this week.

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I’m Back

After almost three weeks in Europe, I am now back home!

First, I would like to thank the entire team that put together the French X-Plane Congress – it was a wonderful event – you guys did an amazing job!  It was great to see so many X-Plane people in one place (including the elusive Marginal!). The French X-Plane community is a strong group and it shows.
I would also like to thank Cris for setting up an informal Italian X-Plane get-together (complete with the Zurich delegation 🙂 for our last night.  We didn’t get much sleep, but it was great to see so many people again before we flew back home.
At this point my in-box looks like someone dropped a bomb on it…it’ll take a while to dig everything out.  The first priority of business is X-Plane 930 – we’ll do a series of betas over the next week or two that will hopefully put the release to bed. Once 930 is done, I can probably beta WED 1.1 and get back to work on scenery.
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Who Are You?

Today Lori and I head to France – we will do a bit of site-seeing before the conference, and then Austin and I will go to Italy to work with Sergio.

So first, my email connectivity will be dubious at best for almost an entire month – if you send me a bug report and hear nothing for several weeks, you’re just going to have to wait…our internet connection in Italy doesn’t really deserve the name “internet connection”, and often doesn’t work at all. (If you need tech support, contact info at x-plane dot com – you should not be trying to reach me for tech support in the first place!)
I fixed a number of beta bugs this week; Austin will probably cut beta 11 before the conference, and then there will be a pause while we’re off the net.  Once we get back, hopefully we can kill 930 off.  (Most of the crash reports I’ve received turn out to be a single bug in the OBJ-handling code, fixed in beta 11, so hopefully the next beta will be stable.)
Now here is my request to everyone at the conference: please … go easy on me if I cannot remember who you are.
The tricky thing about a conference like this is that I mostly know people in the X-Plane community by an email address; if I see a face it is only once every few years.  So if I jumble who you are, what you look like, and what you do with X-Plane, I apologize in advance.  It is not a reflection on the merits of what you do, but rather an indication of the disorganized state of my (soon-to-be-jet-lagged) brain.
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X-Plane 930 Performance and Crashes

I have received a number of emails bringing up crashes and performance problems in the X-Plane 930 betas – some of the writers are concerned that 930 might be a lame patch, going final with crashes and lousy performance.

To assuage this concern, let me make a few comments on where we are in the beta process, the likely future schedule, and the problems themselves.
The Schedule
X-Plane 930 has been an absurdly long beta. Going into the beta I had the mindset that we should take the beta slowly to have time to discover driver bugs on a wide variety of hardware – why rush and miss something?
I think we took this too far. To run a “slow” beta we have run other development simultaneous to the beta, but that in turn has stretched the beta to epic lengths.
We are starting to try to clamp down and close out the beta now, but it is going to get interrupted again. Austin and I will be traveling to attend the X-Plane conference in France, and from there we will spend two weeks working with Sergio in Italy. Given how rarely we go to Europe, we cannot pass up the opportunity to work with Sergio in person – we have a few problems in the sim where getting the three of us in one room is the best course of action.
Unfortunately our internet connectivity during the trip will be limited, and we can only bring some of our equipment, so closing out the beta while on the road is really not an option. Thus there will be yet another beta delay. Hopefully when we return, we can close the beta out for good.
Performance Problems
I have seen a number of emails regarding framerate with 930. A few notes on framerate and betas:
I try to save framerate for last in a beta. Most performance problems have two possible causes.
  1. We communicate with the video card driver in a way that is fast on our systems but astoundingly slow on other systems. We discover this from slow performance in a particular piece of the code on other hardware.
  2. The new beta does something new that is more expensive than what the old build did, and users have not figured out how to (or do not have a way to) turn this more expensive option off.

The solution to case 1 is to use another driver call; the solution to case 2 is to make sure the rendering options provide a way to turn the feature off. (We simply cannot guarantee that a new, nicer looking feature run without a fps penalty – we can only give you a choice between better visuals and faster fps.)

Either way, framerate work tends to be the last thing on my beta list for this reason: other bug fixes may cause framerate problems, typically in category 1 – that is, a bug fixes makes use of a new driver call that we find out has hurt performance. Thus I try to do all performance fixes at the end of beta when we won’t be adding new code.
This means that in practice, I have spent nearly zero time looking at performance. I am just starting that process this week, so it will be a little bit before I find problems.
Unfortunately often performance problems manifest only in the hardware I do not own – despite having a pile of computers in my office (a pile that seems to grow deeper and less manageable every year) there are just a ton of systems out there. So a lot of the performance bugs will get fixed by users trying experiments and reporting back to me – a slow process despite some of the really great efforts by our users.
Crashes
Crashes sometimes are manifestations of gross code defects, but often they fall into the category of driver problems too. I will be working to piece together the puzzle of strange behavior over the next few weeks; usually the solution is to not do some action that we thought was legal but fails in some hardware cases.
Don’t Panic
As always, my final message regarding the beta is: don’t panic. When it gets quiet over the next few weeks, it is because of travel, and even once Austin and I are back in the office, it will be slightly slow going to piece together problems on hardware other than our own.
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Viva La France!

This year Austin, Sergio and I will be attending the X-Plane 09 Conference this year, near Paris. I am excited by the turn-out – a number of people in the X-Plane community who all do great work will be there, in some cases meeting each other in person for the first time. And there will be cheese!

The conference is officially French, and I must admit, I don’t speak a word of the stuff. Fortunately, my beautiful and very patient wife will be there, and she speaks French quite well. So I have asked her to translate the rest of this blog post – a greeting to my French readers.

Bonjour. Ecoutez: Ben croit que je traduis le reste de son article sur ce blog, mais il ne parle pas du tout le français. Lorsqu’on était à Cannes, il a essayé d’apprendre à dire “Le chat est sur la chaise” – ce qui lui a fallu deux semaines! Donc il n’a aucune idée de ce que je suis en train d’écrire, et il ne saura pas non plus si traduis sa présentation correctement ou non.

Lorsqu’il commence sa présentation, je vous expliquerai toutes ses mauvaises habitudes. Est-ce que vous l’avez vu travailler? C’est tellement bizarre! D’habitude il ne porte pas de pantalon. Il s’asseoit devant l’ordinateur en buvant du café et en maudissant les “DSFs” – qu’est-ce que c’est? Je lui ai dit qu’il faut porter un pantalon à la conférence.

I am a very lucky man! I will see you all there.

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A Modern Cessna

With X-Plane 930 beta 8, we finally integrated the latest version of Max’s Cessna 172 SP. Grab the new beta and try it – he’s added a number of new features that demonstrate some of the newer X-Plane 9 airplane features.

  • Real 3-d lighting in the 3-d cockpit. Note how the map light tends to illuminate only some of the cockpit as it fades out.
  • 2-d back-lighting on all of the major steam gauges.
  • A bunch of parts can now be dragged in 3-d, including the door handles. This is done via manipulators.
  • Walls! In 3-d cockpit viewer mode you won’t be able to leave the airplane until you actually open the doors. The cockpit viewpoint is constrained.
  • The model has the glass parts separated out for correct shadowing, and the glass works correctly from all viewpoints.
  • Panel uses cockpit regions for accurate lighting.

The cirrus jet has been similarly updated. I plan to use the Cessna for a series of tutorials showing how to use these recent X-Plane features.

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