Cloud concerns – terms and conditions

I just used Autodesk Cloud Documents for the first time, and was asked to confirm my acceptance of the Terms of Service. Fair enough. But just what is in those terms, and what do they mean to you if you are dubious about using the Cloud? Will you be reassured by what you find there? Maybe not. Here are a few clauses that might make you go hmmm…

The terms applicable to a particular service may vary.

Translation: Autodesk can move the goalposts.

Autodesk has the right (but not the obligation) to monitor Your usage of the Service to verify compliance with these Terms.

Translation: Autodesk can keep its eye on you.

You acknowledge and agree that: (a) You will evaluate and bear all risks associated with Your Content; (b) under no circumstances will Autodesk Parties be liable in any way for Your Content, including, but not limited to, any loss or damage, any errors or omissions, or any unauthorized access or use; and (c) You (and not Autodesk) are responsible for backing up and protecting the security and confidentiality of Your Content.

Translation: whatever happens, it’s your problem, not Autodesk’s.

Third Party Content and services may be made available to You, directly or indirectly, through the Service (including Content shared by other users of the Service, through Forums or by any other means). In some cases, such Content and services may appear to be a feature or function within, or extension of, the Services or the Autodesk Software. Accessing such Content or services may cause Your Computer, without additional notice, to communicate with a third-party website … for example, for purposes of providing You with additional information, features and functionality.

Translation: Autodesk and others can use the service to advertise to you.

Autodesk reserves the right to delete inactive accounts or purge related Content (and all backups thereof), without further notice and Autodesk Parties shall have no responsibility or liability for deletion or any failure to store Your Content.

Translation: don’t just leave your stuff up in the clouds and expect it to still be there a few years later.

You acknowledge that Autodesk may use third-party service providers in connection with the Services, including without limitation the use of cloud computing service providers which may transmit, maintain and store Your data using third-party computers and equipment in locations around the globe.

Translation: it’s not just Autodesk here, there is a chain of responsibilities and vulnerabilities.




Translation: Autodesk lawyers LOVE SHOUTING. Whatever happens, including gross negligence on Autodesk’s part, it’s still all your fault and you’re severely out of luck.

…for all Service Offerings accessed as part of Subscription, these Terms and Your access to the Services will terminate when Your Subscription (and the Subscription Program Terms applicable to Your Subscription) terminates or expires.

Translation: here’s a further disincentive to ever dropping out of Subscription once you’re on it.

It is Your responsibility to retain copies of Your Content. Upon termination Autodesk shall have the right to immediately delete, without notice, Your Content, if any, and all backups thereof, and Autodesk Parties shall not be liable for any loss or damage which may be incurred by You or any third parties as a result of such deletion.

Translation: don’t rely on the Cloud alone.

Autodesk reserves the right, from time to time in its sole discretion, to (a) modify or release subsequent versions of the Service, (b) impose license keys or other means of controlling access to the Service, (c) limit or suspend Your access to the Service, and (d) change, suspend or discontinue the Service at any time.

Translation: Autodesk can do pretty much whatever it likes, including killing the whole thing.

I don’t think any of this means Autodesk is evil. Looked at from the point of view of a corporation that needs to cover its backside and reduce risks to itself, it’s quite understandable. Much of it is just very sensible advice. You can expect similar conditions from other companies providing Cloud services. But what if you’re not happy with using a Cloud service that has such conditions attached? Well, you can use it anyway and keep your fingers crossed, or you stay away from it altogether.

How do you see this? Assuming you were happy with everything else about the Cloud, would clauses like those above be a dealbreaker?

Edit: this post is also being discussed on the Dezignstuff blog.

Note: the above clauses are Autodesk copyright, reproduced here under fair use (comment and criticism).

How do you feel about CAD in the Cloud?

Early last year, I ran a poll to gauge your feelings about CAD in the Cloud. Here are the results of that poll:

Cad in the Cloud 2010 Poll

As you can see, the poll response bell curve was clearly biased toward the frightened end of the spectrum, and there was little in the way of excitement at the Cloudy prospects for CAD. A fair bit has happened since last February (particularly the recent Autodesk Cloud announcement), so I thought I’d see how the ground lies at the moment. Are you feeling more positive about Cloudy CAD than you were 18 months ago? 

I’ve just added a poll for you to vote on, identical to last year’s. In addition, I’d love to see your comments on the subject. Is CAD in the Cloud inevitable, or is it not going to fly? If you don’t think it will take off and take over, why not? Is it going to be Heaven, Hell, or somewhere in between? I have my own views, but I’ll keep them to myself for now; the floor is yours.

This blog is just wonderful, apparently

One of the more interesting things about running a blog that is visited by a reasonable number of people is the fan mail. My immense modesty prevents me from keeping visible the thousands of positive comments that are posted here, but I thought I would give you an idea of the sort of praise I receive (and Akismet hides) on a daily basis. This small sample is all from the past 48 hours, with my comments in blue:

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Best and worst AutoCAD features ever – polls

Using your suggestions and a few of my own, I have added two polls for you to select what are, in your opinion, the best and worst features ever added to AutoCAD. To help us find The Answer, there are 42 items in each poll, from which you can choose up to three.

A few items (e.g. Action Recorder) made it into both lists, while several items in the ‘worst’ list (e.g. 2012 Array, Ribbon, Annotative Scaling) were suggested multiple times. It will be interesting to see how the poll results pan out.

Autodesk Cloud – don’t panic, business as usual

Autodesk recently made a big announcement about its Cloud initiatives, and reactions have been all over the place. Some people can barely contain their breathless excitement while others are outraged to the point of passing out the pitchforks. Why? It’s pretty much business as usual.

It’s nothing like Dassault’s disastrous we’re-moving-you-to-the-Cloud FUD campaign against its own product, SolidWorks. There’s no hint here of AutoCAD (real AutoCAD, I mean, not “AutoCAD” WS) being moved to the Cloud, or anything as radical as that. (Yes, I know there’s a limited experiment along those lines but that’s nothing to do with this announcement). It’s just a collection of relatively minor changes to Autodesk’s existing on-line services, collected together to make a newsworthy press release.

(As an aside, I must say this was a much more worthwhile announcement than the ridiculously over-hyped DE8.16N thing. So I was supposed to get excited about a routine upgrade of a product I have already been using for months, on an OS I don’t use, when the upgraded product is still half-baked just like the first underwhelming effort? Fortunately, I didn’t get sucked in by the pre-announcement build-up so I wasn’t disappointed, just amused when the truth was revealed. Autodesk PR, please don’t cry wolf so often; keep the hype in reserve for the hypeworthy stuff.)

Back to the Cloud thing, and putting aside hype and horror, here’s the stuff that has just happened:

  • Autodesk Cloud documents lets anybody store up to 1 GB documents on-line, or 3 GB if you’re a Subscription customer. This isn’t new, but until recently it was an Autodesk Labs project called Nitrous. The infrastructure is provided via Amazon and Citrix.
  • AutoCAD WS has been updated to integrate its storage with Autodesk Cloud documents. Remember, WS isn’t anything like real AutoCAD, but rather a limited on-line DWG editing tool. There’s a WS iPhone app, but that’s not new.
  • There’s an Autodesk Design Review iPhone app for reviewing DWF files you’ve stored in Autodesk Cloud. It won’t do DWG; use WS for that.
  • There are several cloud-based services that are available “free” to Subscription-paying users of a small subset of Autodesk software, mostly Revit and Inventor-based suites. They are: 
    • Inventor Optimization
    • Cloud Rendering
    • Green Building Studio
    • Conceptual Energy Analysis
    • Buzzsaw (now bundled with Vault Subscription)

    AutoCAD users need not apply for any of these services.

So some of Autodesk’s on-line services are now being provided only to Subscription customers, and one is offered in improved form for Subscription customers. There are two obvious reasons for this: tie-in and revenue.

First, Autodesk wants its customers tied to the Subscription gravy train, if you’ll excuse a fairly awful mix of metaphors. Offering Subscription benefits like this is preferable to some of the much less pleasant arm-twisting that has been happening recently (e.g. trebling upgrade prices). Is it too much to hope that Autodesk has learned that offering carrots to its customers is a better strategy than threatening them with sticks?

Second, Autodesk needs to start making money out of this stuff somehow. For some years, it has spent several fortunes on buying and developing on-line services and then given them away for nothing, usually as Labs projects. This obviously can’t go on for ever, but just slapping a charge on these services wasn’t going to fly. Bundling Cloud services up with Subscription is a way of easing people into paying for them, and this is something I expect to be expanded in future, for example with AutoCAD WS. Once that’s been established for a few years, it wouldn’t surprise me to then see Subscription for at least some of the services split off, so you’re paying for Cloud services explicitly. By then, enough customers may consider them to be worth paying for and they may therefore survive beyond the short term.

Will it work? I’m not sure. Time will tell which of these services will thrive and which will die, and such uncertainty is one of the many reasons real-world customers aren’t excited about getting their heads in the Cloud. I don’t intend to make use of these services (I’m not even allowed to), so I’m not too bothered what happens to them. Like the vast majority of Autodesk customers, I will just carry on using conventional software in that old-fashioned 20th century way that just happens to work very well. Autodesk will go on providing its software in that way, because that’s what most customers will want for at least a while yet, and Autodesk can’t survive on wisps of Cloudy revenue.

Move along, people, nothing to see here.

What are the best and worst features ever added to AutoCAD?

Audience participation time, I think. A comment on one of AutoCAD 2012’s new features recently set me thinking about what were the worst features ever introduced to AutoCAD. That in turn got me thinking about what were the best.

I’ll keep my opinions to myself for a while, as I’d like your input and don’t want to influence it. Please add a comment with your list of what you consider the best three features ever added to AutoCAD and the worst three. If you can’t think of three of each, you can submit less, but please don’t submit more. By all means discuss at length the things you love or loathe, but make it clear what you’re submitting by using a clear format like this (meaningless examples only):

1. Content Explorer
2. Online Help
3. Nudge

1. AutoLISP
2. Transparent zoom and pan
3. Paper/model space

What do the words “feature”, “best” and “worst” mean? I’ll leave that for you to decide for yourself. You might consider “worst” to be something that’s a bad idea, poorly implemented, slow, inefficient, poorly documented, bloated, buggy, half-baked in the short or long term, clueless in some other way, or some or all of the above. It’s up to you.

When I have enough submissions, I’ll collate the most popular (and unpopular) features into a pair of polls for you all to vote on. Have fun!

Edit: I have now added the polls and closed comments on this post.

Taking control of your command line history

Thanks to Kean Walmsley’s post on his Through the Interface blog, I have learned something that would have been handy to know for the last decade or so, but which somehow escaped my knowledge. I learned how to increase the size of AutoCAD’s command line history cache. It defaults to 400 lines, which isn’t enough for me. I think this information deserves a wider audience than the ubergeek developers who frequent Kean’s blog, so here goes.

Although it’s not directly mentioned on Kean’s post, you can find the current command line history cache length setting like this:

(getenv "CmdHistLines")

This will return a value showing the number of command lines AutoCAD remembers, e.g. “400”. Although this is used as an integer value, it is passed to and from the Registry as a string. You can set a new value as shown below. Again, use a string, and note that values outside the range 25 to 2048 will be ignored:

(setenv "CmdHistLines" "2048")

Also, if you don’t like AutoCAD repeatedly stopping during a long listing (e.g. SETVAR ? *), you can turn off that feature by setting the QAFLAGS system variable to 2. Don’t set it to 8191 as suggested in Kean’s post, because that will change a lot of other settings, few of which are documented publicly.

Will Autodesk have to explain itself to the SEC?

The observant among you may have noticed that for many years, Autodesk’s free patches, service packs and updates haven’t added any new functionality. Bugs may get fixed, severe performance issues may be addressed, but design errors generally have to wait for the next release (at the earliest), and new features definitely don’t get added.

The last time new functionality was added to AutoCAD in a free maintenance release was Release 13’s c4 update which shipped on 12 February 1996. (There was a public beta available some months earlier; I picked up a copy at Autodesk University 1995). That free update contained not only a host of bug fixes, but also more useful new features than some later full-price upgrades (e.g. AutoCAD 2000i). In an outbreak of outstanding customer service, a c4 CD was shipped free to all registered users. Maybe Autodesk was trying to recover from disastrously shipping Release 13 prematurely, but issuing such a comprehensive update free of charge was still highly commendable.

Why did Autodesk stop providing new functionality in free updates? While it involves more work for Autodesk and hardly encourages paid upgrades or Subscription, the reason we’ve been given over the years is that there are accounting regulations that prevent Autodesk from providing new functionality in free updates. This does not apply to benefits from paid Subscription, and various new features for Subscription users have indeed appeared (albeit in fits and starts) over the intervening years.

I have to admit that I have always thought that this accounting thing was a pretty unlikely-sounding excuse for Autodesk’s inactivity. This attitude was reinforced by a lack of Autodesk response to my requests for further information about the alleged regulations. Until recently, I didn’t care enough about this matter to bother finding out for myself, but something extraordinary just happened that piqued my curiosity.

What happened? Autodesk released a free Service Pack that included new functionality for the first time in over 15 years. I was particularly interested in this, because part of what’s new is a new command providing a subset of the functionality of my ClassicArray™ plug-in. When I put in the time and effort to develop this product to fill a hole of Autodesk’s making, I did so on the assumption that Autodesk wasn’t going to provide an Array dialog box until at least AutoCAD 2013. It turns out that this assumption was wrong.

So what’s all this about accounting regulations preventing new functionality being provided free between releases? Was I right to be vaguely cynical about that? After some research, it would appear that I was wrong about that, too. There is an FASB (responsible to the SEC) accounting standard called SOP 97-2, which covers software revenue recognition. I’m no accountant and the regulations are large and complex, but here is my layman’s understanding of the basics.

In a simple case where a vendor (e.g. Autodesk) sells a complete product (e.g. AutoCAD 2012) at a given date, it records and declares the revenue for that product in the appropriate period as a single unit of accounting. If there are multiple elements of the product, things get more complex. If Autodesk ships part of AutoCAD 2012 (the main product) at one time and part (e.g. a Service Pack with new functionality) at another, then it is required to separate the elements into multiple units of accounting. It is required to make available vendor-specific objective evidence (VSOE) for each element of the product. If Autodesk has not done so (which seems likely), there is probably a problem. My understanding is that without VSOE, Autodesk is required to allocate the revenue for AutoCAD 2012 sales not at the point when it was received, but when all the elements have been delivered (i.e. when SP1 was released).

What about an argument that the new ARRAYCLASSIC command and new SNAPGRIDLEGACY system variable are not new functionality in themselves, but merely mechanisms to restore functionality that was available in previous releases? I don’t think that matters. The functionality is new to those customers who purchased AutoCAD 2012 and thereby provided Autodesk with revenue between March and September 2011. If that revenue has been allocated incorrectly, then Autodesk has some revenue shuffling and explaining to do.

I repeat that I’m not an accountant and this is all a layman’s uninformed opinion. It is quite possible that the regulations have recently changed, or that a relaxed interpretation is now permissible, or that I have the wrong end of the stick entirely. I’ve admitted being wrong in this post twice already and it could well be thrice.

If I’m wrong and Autodesk is in the clear, that’s great. Why? Because it means Autodesk customers can look forward to a lot more functionality being provided in future service packs.

AutoCAD 2012 Service Pack 1

The first update for AutoCAD 2012 is now available on the Autodesk site. As usual, read the readme first and exercise the usual paranoia. Make sure you install the right version (32 or 64 bit). The update is also available for AutoCAD LT 2012. There is no news yet on equivalent updates for vertical variants of AutoCAD, so just talk amongst yourselves for a while until Autodesk gets around to it.

Autodesk has, thankfully, abandoned the confusing nomenclature for its service packs. So this is not 2012 Update 1 with a filename that includes SP1 and which results in the software being considered 2012 Version 2. It is 2012 Service Pack 1 with a filename that includes SP1 and which results in the software being considered 2012 SP1. Why Autodesk thought the former convention made sense is beyond me, but at least it’s over now.

This Service Pack is unusual for more than that, though. It’s the first free update since R13c4 in 1996 to include new functionality, i.e. a new command (ARRAYCLASSIC) and a new system variable (SNAPGRIDLEGACY). I’ll have more to say on that later.

Old news – shipping version of ClassicArray released

I have been somewhat neglectful of this blog lately, including a failure to mention that my ClassicArray™ plug-in for AutoCAD 2012 has been shipping since 1 May 2011. Thank you to those people from various places around the world who have been prepared to go to the effort of registering and paying for the product.

Here are some details of the product taken from the ClassicArray page:

ClassicArray is a simple-to use but powerful tool for creating arrays in AutoCAD.

  • Provides a dialog box interface to AutoCAD 2012’s Array command. The familiar interface method provides continuity with earlier releases.
  • Supports the creation of both associative and traditional non-associative arrays.
  • Provides an in-dialog preview panel to give you a quick idea of what your array will look like before any objects are created.
  • Allows creation of a preview array which can be accepted, rejected or modified before the desired array is finally chosen.
  • Base objects can be incorporated into the array or left intact as desired using a simple toggle.
  • Allows simple creation of 3D arrays.
  • Comprehensive Help is available from within the dialog box.
  • Provides Ribbon tabs and toolbars, separated into associative and non-associative sections.
  • Setup routines are provided that support either all users (requires admin rights) or the current user (no admin rights required). Uninstallation is via the standard Windows Control Panel methods (Uninstall a Program, Add/Remove Programs).
  • Uses AutoCAD 2012’s new Plug-in feature to provide application behavior consistent with other add-ins.
  • Acts as a workaround for various AutoCAD 2012 Array bugs and limitations.
  • Supports AutoCAD 2012 for Windows and vertical products derived from it. Sorry, due to Autodesk API restrictions ClassicArray can support neither AutoCAD LT nor AutoCAD for Mac.

See the ClassicArray Help page if you want to see a full description of the product, including screenshots.

One more thing I should mention is that if you have used one of the Beta versions of ClassicArray, please make sure you uninstall it and install the shipping version before registering the product.

AutoCAD 2012 – Autodesk adds an uninstallation analgesic

One of the more painful aspects of dealing with installations of recent releases of AutoCAD and related products is that although you might run a single setup routine to install what you think is a single application, the end result is a mass of different components being installed. Each of these components is considered a separate program by Windows, and needs uninstalling separately. Frankly, this is manifestly antisocial behaviour.

I have complained to Autodesk about this ever since it started happening, but the number of sub-installations has been getting greater rather than smaller. Now Autodesk has provided an uninstallation tool, which you can find here. If you download and run psebuninstalltool.exe, you will be provided with a list of applications to uninstall.

This is a move in the right direction, but it’s still far from ideal. You still have to choose which applications to install and which to leave alone because they’re in use by some other application, and because of the possible complexities you’re not likely to know. Get it wrong and you can break other applications in a way that’s not immediately obvious. Also, it uninstalls English language products only and is provided “as-is” as an unsupported tool.

This is a welcome kludge to help with a problem that shouldn’t exist. Users simply shouldn’t have to deal with this nonsense. If you install one application, you should be able to just uninstall one application and it should be gone, without breaking anything else. Autodesk, thanks for this interim assistance, but I look forward to the problem being removed in future releases, rather than partially patched over.

AutoCAD 2012 – How to “hatch” using any objects

Here’s a trick you can use in AutoCAD 2012 to fill an area with any objects you like. It’s not actually hatching, but it has several advantages over the real thing:

  • You aren’t restricted to straight line segments as you are with real hatching. Circles, splines, even solid objects, you name it, you can use it.
  • To define the pattern, you don’t have to master an arcane file format or use trigonometry to work out the numbers used in it. Just draw the objects you want repeated.
  • You can easily change the spacing between the objects later, or even change the objects themselves.

How is this done? Use the new associative array feature, then use XClip to restrict the displayed objects to within a specified boundary. For example, let’s say you have a polyline you want filled with green spheres, and a green sphere already drawn. The sequence is:

  • Use the Array command to create a rectangular array of spheres that more than covers the whole area you want “hatched”. You might prefer to use my ClassicArray add-on for this, but it will make no difference to the finished objects.
  • Use the XClip command and select the array of spheres. Press Enter to accept the default option of New. Type S [Enter] to select the polyline, then pick the polyline. Done!

Don’t have a handy polyline defining the area? No problem, just create one before you start using the Boundary command.

There are some restrictions to this technique that do not apply to normal hatching. For example, any arc segments in the polyline will be treated as if they were straight lines, which isn’t very useful. But this method will work in most cases, and it sure beats spending hours trying to get your hatch pattern definition just right. You can even use an array of arrays to get some very interesting effects. For example, you could have a series of circles in a wave-form path array, which is then arrayed in a rectangular form before being Xclipped.

Not using AutoCAD 2012? You can do something similar using Minsert. Instead of Array, use the Block command to convert your objects to a block, then the Minsert command to insert it in a series of array-like rows and columns. Finally, Xclip it as described above.

Edit: In a comment, Patrick Emin reminded me of the Express Tools command SuperHatch. This allows you to use an image, block, xref, or wipeout object as a hatch pattern. It also automatically takes care of various details, including converting arcs within the boundary to straight line segments. However, the end result can be hundreds of individual blocks collated into a group, rather than just one configurable object if you use the Array or Minsert methods I describe above.

How to make Ctrl+C perform a Cancel

In a recent comment, I was asked how to make Ctrl+C perform a Cancel. Before I get onto that, here’s a bit of history.

Back in the Dark Ages of DOS, the way to cancel a command was by holding down Ctrl and pressing C. The last release to work like this by default was Release 13 for DOS, released in 1994. I remember the bother it caused my users who were faced with the Windows version in which Esc was used to cancel things and Ctrl+C copied objects to the clipboard. It took me at least a year before I had totally removed Ctrl+C = Cancel from my muscle memory.

Until AutoCAD 2005, Autodesk provided an easy option to keep things the way they were by turning off the toggle Options > User Preferences > Windows standard accelerator keys. In recent AutoCAD releases, you have still been able to do it, but it’s a little more involved and uses the CUI command. Here’s how:

  • Enter the CUI command.
  • In the top left pane, burrow down to Keyboard Shortcuts > Shortcut Keys.
  • In the bottom left pane, scroll down to find the Cancel item. Click and drag it onto Shortcut Keys in the top left pane. Because of a long-standing auto-scroll annoyance in the CUI interface, you will find this easier if you drag off to the right, then up, then left onto Shortcut Keys.

That adds Ctrl+C = Cancel to the set of shortcut keys AutoCAD understands, but it won’t work yet because it will clash with the Ctrl+C = CopyClip shortcut key that’s already in there. We need to get rid of that before we’re finished in CUI, or more usefully, assign it to a different key:

  • Find Copy Clip in the Shortcut Keys list in the top left pane and click on it.
  • In the bottom right pane, find Access > Key(s). Where it says CTRL+C, change that to something else of your liking (e.g. CTRL+ALT+C). If you pick the […] button, you will be able to record the keystroke sequence directly instead of typing it in and worrying about syntax.
  • Pick OK and you’re done.

This post may be directly useful to only a handful of people who are still holding out after all these years, but it also serves as an introduction to a more generally useful skill; setting up keyboard shortcuts in CUI.

Installation tip – save time and space

If you download AutoCAD or other Autodesk products from either the trial or Subscription sites, the executable you get (e.g. AutoCAD_2012_English_Win_32bit.exe) is actually a self-extracting archive rather than a real installer. When you run it, you are prompted for a destination folder, with a default location such as this:


The actual installer (setup.exe) and all of the files it needs are then unzipped and placed in a folder structure in that location. When the extraction is finished, the self-extracting executable automatically runs setup.exe and the installation proper can begin. Once the installation is complete, the extracted files are left in place.

You can take advantage of this simple knowledge in various ways:

  • Sometimes, you may you need to run the installer more than once on the same PC. For example, you might need to uninstall/reinstall AutoCAD, or you might be a CAD Manager who installs AutoCAD for on your own PC and later creates a deployment for the other users. Or you might start installing AutoCAD, cancel it for whatever reason, then come back to it later. If so, don’t just run the downloaded executable again. Instead, locate the actual setup.exe installer that has been left behind and run that instead. That cuts out the extraction step and saves time.
  • If you’re going to do standalone installs on several PCs rather than making a deployment, don’t go through the extraction process again and again. Instead, do it once and then copy the extracted folder to a location that can be used from other PCs. This might be a USB drive or DVD, which you can store safely for later reinstalls. If you are going to install to the other PCs from a network drive, during the first install you can directly specify that as the destination folder and cut out the manual file copying step.
  • If you think it’s unlikely you’re going to need the extracted files again, you can delete or move them and recover the space. If you download a product and install it, you end up with three copies of the product files using up your space; the self-extractor, the extracted files and the installed product itself. It probably doesn’t all need to be on your C: drive. Although bulk hard disk space is plentiful and cheap, it’s becoming more common to use a small high-speed drive or SSD as the OS/program drive drive, and you might have a significant portion of it given over to a bunch of files you don’t need. Because Autodesk products are increasingly (and sometimes completely pointlessly) bloated, you might be surprised at how much space you can recover.
    However, as Chris Cowgill has pointed out, you may need to have the “media” available when you install Updates, etc. Keeping a copy of the extracted files on a DVD or USB key should do the trick if you’re hard up for hard disk space.

Note that this applies to the Windows downloads only; I know nothing about the mechanics of Autodesk’s Mac installation downloads.

3DConnexion device support in AutoCAD

Do you have a 3DConnexion device (3D ‘mouse’) and use it in AutoCAD or AutoCAD-based products? What do you think of the way it works in the most recent releases of AutoCAD?

From AutoCAD 2011 on, Autodesk provided built-in support for these devices. Has that made things better or worse than in earlier releases? If you’re having problems, exactly what are they and how does it affect your ability to work with AutoCAD in 3D? Is the 2012 support any better than 2011? How does AutoCAD’s support for these devices compare with that of other products?

AutoCAD 2012 – Autoloader mechanism for plug-ins

One of the less obvious features introduced by AutoCAD 2012 is the Autoloader mechanism that has been provided to make installation of plug-ins (current standard Autodeskspeak for add-ons, apps, utilities, routines, etc.) easier for both developers and users. It may not be immediately obvious, but it’s a useful and important addition.

This mechanism has nothing to do with the AppLoad command, the Startup Suite, acad*.lsp, the (autoload) function or anything else that existed in earlier releases. This is completely new, it has not replaced or broken any of the existing loading mechanisms, and is, in short, A Good Thing. Developers don’t have to use it, but those who do, and their customers, will have certain advantages. I have used it for the ClassicArray loading mechanism, and I expect to see it used by more and more plug-ins over time. It works fine with all of the usual AutoCAD add-on APIs, including LISP.

User perspective
As a user, what this means is that for AutoCAD and related applications from 2012 on, there is a standard loading mechanism for plug-ins. The installation should be straightforward, with no multi-step processes to go through for different AutoCAD variants and releases. The result of the installation should automatically present itself in a standard way, with a short-lived welcome bubble, an extra panel in the new Plug-ins Ribbon tab, plus any other interface additions the developer wants to provide. If you subsequently install another AutoCAD variant or release, the plug-in will automatically appear in that variant with no further user action required, as long as that AutoCAD variant is supported by the plug-in.

Developer perspective
What this means for me as a developer is that I have much less to worry about in terms of installation. All that needs to be done to make the loading happen is for a folder full of ‘stuff’ to be copied into a certain location. (There are actually two possible locations, but more on that later).

In Betas of ClassicArray, I just provided the folder, plus instructions that asked the user to copy that folder into place. I could have simplified that further by providing batch files that did the copying. In the end, I created setup executables using the free Inno Setup utility, but that was a much easier job that it would have been if this Autoloader mechanism didn’t exist. I didn’t have to worry about discovering what releases were installed, deciphering Registry entries, creating user installaton scripts, or issuing instructions to users to edit files or mess with the AppLoad command. I don’t have to worry about what happens if the user subsequently installs another AutoCAD variant.

Of course, for developers who support releases prior to 2012, there is no less work to do than before, and some time needs to be spent to learn and implement the new mechanism. In the case of ClassicArray, that was not an issue because it’s only needed and supported in 2012. I expect this is one of those problems that will resolve itself over time as developers adopt the new mechanism.

The bundle folder
So what is this ‘stuff’ that needs copying into place? It’s called a bundle folder. It’s just a folder with a name that ends in .bundle (e.g. ClassicArray.bundle), and it typically contains the usual files needed to run your add-in, often tidied up within other folders. The only new thing that it needs to contain is a file called PackageContents.xml. That XML file is the key to the Autoloader mechanism. AutoCAD finds the file, reads it, and acts accordingly in terms of version support, loading program files, partial cuix files and so on.

Bundle folder location
So where does this folder with its XML file have to go? There are two possible locations. If you want the plug-in to be available to all users on the computer, you place it in the Autodesk\ApplicationPlugins folder underneath the system’s ProgramFiles folder. For example, ClassicArray usually gets put here:

C:\Program Files\Autodesk\ApplicationPlugins\ClassicArray.bundle

If you only want the plug-in to be loaded for the current user, it goes in the Autodesk\ApplicationPlugins folder underneath the system’s AppData folder instead, for example:

C:\Documents and Settings\[login]\Application Data\Roaming\Autodesk\ApplicationPlugins\ClassicArray.bundle

in XP or


in Windows 7.

Describing the contents of that all-important XML file is beyond the scope of this post, but I may do a follow-up post if there is enough interest. In either case, the reference material is available in the AutoCAD Help, under Help > Customization Guide > Introduction to Programming Interfaces > Install and Uninstall Plug-In Applications > PackageContents.xml Format.