Tag Archives: BLADE

The BLADE video watchlist

I did my third and final (for now) BricsCAD Unplugged webcast about BLADE last Wednesday. Here’s the video:

Before I dig into DCL, I start with a brief description of an absolutely brilliant feature that was added to BLADE in V19. If you code in LISP, you’ll love this feature.

Then I move on to some ancient history. Did you know that we can thank the far-sightedness of some slightly renegade Autodesk OS/2 developers in the early 1990s for the dialog boxes we use today? Did you know that you could program dialog boxes for AutoCAD for Mac in 1993 but you can’t today? Can you spot the items of interest in the background?

The rest of the video is dedicated to describing DCL programming and debugging, and I explain how BLADE is the best tool for that job using examples.

If you want to watch all three of the BLADE videos in a row (that’s 1 hour 49 minutes of viewing), Matt Olding has created a YouTube playlist for this series.

It has been an absolute pleasure working with the Bricsys people in putting this series together. Torsten Moses has informed me about yet another bunch of enhancements that are coming very soon to BLADE, so maybe you haven’t heard the last from me on this subject on BricsCAD Unplugged.

Addendum – Why every AutoCAD CAD Manager should have a copy of BricsCAD – part 1, fixing drawings

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This post is an addendum to a post from June, Why every AutoCAD CAD Manager should have a copy of BricsCAD – part 1, fixing drawings. This post provides new information about useful functionality added in V19 of BricsCAD that is useful for any CAD Manager or power user who ever has problem DWG files to deal with. Yes, even if your site is still purely AutoCAD-based.

In this post I’ll describe the (inspector) LISP function. This was added in the V18 cycle but was significantly enhanced in V19. It’s probably the most useful LISP function you’ve never heard of.

Although it’s LISP, that doesn’t mean you have to be a programmer to benefit from it. If you’re a non-programming CAD Manager or power user, you can use it to work out what’s going on within any DWG you’re having problems with. You can use it to discover information about objects in the drawing; not just conventional entities, but also blocks, tables, dictionaries and so on. It even works with custom data.

I gave a brief demonstration of (inspector) in the last BricsCAD Unplugged episode about BLADE. However, you don’t need to use BLADE; just enter (inspector) at the command prompt, select an object and you’ll be presented with a dialog like this:

These dialogs are modeless, and you can have as many displayed as you like; you’re not limited to one. This dialog displays the same data in three different ways. At the top, it’s shown in traditional LISP assoc form, and by playing with the Expand controls you can vary the way in which this is pretty-printed. The bottom left pane shows the data in DXF form, which is probably easiest to read if you’re a non-programmer. If you’re more of an ActiveX person or you prefer to see the properties described with words rather than numbers, you’ll prefer the display on the bottom right, which shows the COM properties for the object.

If you want to select another object to inspect without calling (inspector) again, just use the [ > > ] button.

The grayed-out lines indicate data that is considered read-only. It’s important to note that this doesn’t mean it’s impossible to change the data, merely that the ways in which that data can be changed within a program is restricted. Generally, it means you can’t change the ActiveX properties directly, but there are various other means that can be employed in many cases.

The lists are somewhat interactive; double-click on an entity name and you’ll be given another inspector window for that entity. You can burrow down through the drawing database in this way, looking for the source of your mystery DWG problem. If you’re using it while programming, you can use it to work out what set of circumstances is causing your code to trip up in certain drawings.

The (inspector) function has an optional argument, and what it will accept is very flexible. If you pass an entity name to it, you will get the data for that entity displayed. The same principle applies for various ActiveX objects: pass it a layer table object and the appropriate data will be displayed.

Direct access is provided to various useful things from within BLADE using the pull-down menu Lisp+DCL > Browse DWG Database:

If you pick Browse Text Styles, you’ll see something like this:

Double-click on one of the text style items in the left pane and you will get this:

As you can see, this is very handy for tracking down issues both while programming and when diagnosing DWG problems.

Finally, I should note that there is potential for the inspector to provide even more power in future. Bricsys LISP guru Torsten Moses is investigating the possibility of allowing the inspector to modify data, not just inspect it. There’s potential danger there, but if Torsten can make that work safely then that would be another invaluable tool for any DWG-based CAD Manager.

As I stated in my original post, it’s definitely worth a CAD Manager’s while to do the quick download and install of an evaluation BricsCAD. My experience in dealing with Bricsys is that requests for extensions for evaluation purposes are usually accepted, so you probably won’t have to give up your valuable tool as soon as your 30 days are up.

Video – who is that masked man?

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Last night I made another guest appearance on the BricsCAD Unplugged webcast series. This time I was discussing the LISP development environment, BLADE. Here’s the video:

Bonus points will be awarded for identifying three items of interest in the background. No, not counting my dog Sunday asleep at lower left.

Despite going way over time, there was still nowhere near enough opportunity to describe the full LISPy awesomeness that BLADE represents. I am therefore scheduled to return for another two or three episodes beginning in February. In those, I’ll be doing more of a step-by-step demonstration rather than the overview and V19 new feature description I did in this episode. If you have any particular requests for what you want covered, please comment on this post.

I also showed how the tools in BLADE (e.g. the (inspector) function) are still worth having for any DWG-based CAD Manager or power user, even if you’re not a full-on LISP programmer. If you have to work out what’s going on with dodgy DWG files, you’ll want to have (inspector) in your set of tools.

The BricsCAD Unplugged webcast broadcasts run on the Bricsys Facebook page and are then quickly transferred to YouTube. This was the last episode for 2018 because of Christmas and New Year.

Wielding BLADE on BricsCAD Unplugged

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In September I was the special guest on the BricsCAD Unplugged episode BricsCAD Unplugged – Steve Johnson 5 surprises moving to BricsCAD. Next Wednesday I will return, this time to wield BLADE, the best thing to happen to CAD LISP in nearly 20 years. I’ll be introducing it and demonstrating a few things, including the new features that came with V19.

These live broadcasts are run on the Bricsys Facebook page and are then quickly transferred to YouTube. This broadcast will start at UTC 15:00 (3 PM) on Wednesday, 19 December 2018. Here’s that time in a few handy time zones:

Location	Zone	Time
San Francisco	PST	07:00
Minneapolis	CST	09:00
New York	EST	10:00
London	GMT	15:00
Brussels	CET	16:00
Moscow	MSK	18:00
Mumbai	IST	20:30
Perth	AWST	23:00

My Bricsys 2018 – getting there

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Last month I attended my third annual Bricsys conference. Following on from Munich and Paris, this year’s event was held in London. (For those who remember M’s cheesy hit Pop Musik from 1979, you will notice that Bricsys is holding these events in reverse order, and the next event should therefore be held in New York).

Before we get to the conference itself, I should point out that I preceded it by pinging around Europe doing other Bricsys-related things. I had a couple of days in Berlin with BLADE creator Torsten Moses, preparing our upcoming presentation on BricsCAD’s VLIDE-beating IDE.

We retired to a church building in a forest just outside Berlin and spent a very long day thrashing out a series of demonstrations, down to the last click and keystroke.

Then I shot over to Vienna for another couple of days, where I interviewed the good people at Schrack Seconet about their experiences with their 101 licenses of BricsCAD.

Look out for that when it’s published on the Bricsys Blog in the forthcoming Real World BricsCAD series.

I spent a couple of days in the English countryside rehearsing and preparing for the BLADE presentation, and took this photo which I inserted into my PowerPoint at the last minute.

THE BLADE at Reading Abbey – modernity towers over the ruins of what was once magnificent

Once in London and checked into the hotel, I visited the Bricsys 2018 venue, The Brewery.

It was interesting to check out the preparation that goes into running an event like this. Here, the AV people were testing the individual elements of the huge screen.

Then it was back to the hotel bar where I caught up with lots of old friends, many of whom I knew from previous Autodesk and Bricsys events. In addition to big CAD names like Ralph Grabowski, Randall Newton, R.K. McSwain, Robert Green, Owen Wengerd, Don Strimbu and several Bricsys high-ups, it was great to finally meet the amazing LISP talent Lee Mac.

Steve and a few of the former Autodesk people

It was particularly pleasant to meet up again with the fabulous and talented IPoCs Lynn Allen and Heidi Hewett, who I last met in person at the AutoCAD 2010 launch in San Francisco. The networking that goes on at these events can be just as educational as the presentations, and I certainly learned a few things over a Leffe or two.

Lynn loves Leffes

A dinner for (mostly) press people also proved educational. Despite knowing that some big announcement had been made to the Bricsys employees, we were still none the wiser about exactly what that announcement was. We know now, of course, but right then we were still in the dark.

One thing that was different for me this year is that quite a few people approached me to thank me for my writings on this blog. It was amazing for me to be standing next to somebody way more famous than me, and have people want to shake my hand. Although I found it odd, it’s also gratifying. Thank you to those people who took time out to say that they appreciate what I do.

In the next post in this series, I’ll describe day 1, where the shock announcement was made, and where a user group was born.

Video – Steve on BricsCAD Unplugged

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Following on from Lynn Allen and Robert Green’s guest appearances on the BricsCAD Unplugged webcast a couple of weeks ago, this time it was my turn.

Last night (my time) I was the special guest on the episode BricsCAD Unplugged – Steve Johnson 5 surprises moving to BricsCAD. I’m introduced at 2:12 and appear at 3:30. Here’s the full video:

In this week’s episode, you’ll witness:

Me discussing the five biggest things that pleasantly surprised me about BricsCAD. (I have more than five, but time was limited).
Don Strimbu bribing me with drinks containers.
An actual printed copy of Cadalyst magazine from 1995, complete with my old column Bug Watch (1995-2008).
The excellent euphemism, “You’re generally pretty conservative in terms of your praise.”
Don throwing me a curveball by introducing my points out of order!
The announcement that I’ll be at Bricsys 2018 in London and possibly participating in the BLADE session.
Me saying, “No. I’m wrong.”
Me drinking a glass of wine (parental guidance advised – alcohol consumption depicted). If you care, it’s a Shiraz (that’s Syrah if you’re American) from South Australia’s Limestone Coast region.
Total lack of coordination from everyone in raising our drinks at the end.

Thank you to the Bricsys crew for the invitation, it was a blast! If you ever want me on again, I’ll be happy to oblige.

For future reference, these live broadcasts run on the Bricsys Facebook page and are then quickly transferred to YouTube.

Mac users rejoice – at long last, a LISP IDE comes to OS X

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CAD’s best LISP development environment has come to the best “AutoCAD for Mac”. It should come as no surprise to anyone that this has occurred without Autodesk’s involvement.

What’s happened?

With the release of BricsCAD (Mac) V18.2 (currently V18.2.23-1 to be precise), BLADE (BricsCAD’s much-superior equivalent to VLIDE) has been added to BricsCAD

See here for the release notes and here to download. Make sure you select the Mac version:

Significance

This is pretty significant for anybody serious about using DWG-based CAD on the Mac. AutoCAD without LISP is hardly worthy of the name, which is why I’ve never been keen on AutoCAD LT from the moment LISP was yanked out of it just before release in the early 90s. There has never been an integrated development environment for AutoCAD for Mac (either in the first iteration in the 1990s or the second attempt in the 2010s) and I think I can safely predict that there’s never going to be one. I expect AutoCAD for Mac’s LISP to remain forever in 1990 mode.

Compatibility

One problem a small number of users may face when developing for Mac with BLADE is that of downward compatibility. In case you’re wondering, BricsCAD (Mac) to AutoCAD for Mac is very much a downward direction, particularly in the area of LISP. The LISP in AutoCAD for Mac is famously half-baked with large portions of functionality missing, including no ability to control dialog boxes. BricsCAD (Mac)’s LISP is very much more capable, so while compatibility between AutoCAD for Windows and BricsCAD (Mac) is strong, you can’t say the same for LISP compatibility between AutoCAD for Windows and AutoCAD for Mac.

Half of the stuff you write for AutoCAD in Windows is just going to fail when you try to run it in AutoCAD for Mac. Much more of it is going to work in BricsCAD (Mac). While you can now write, debug and run your LISP code efficiently in BricsCAD (Mac) and it’s practically guaranteed to run just fine in AutoCAD and BricsCAD for Windows, it will be very easy to write stuff in BricsCAD (Mac) that doesn’t work in AutoCAD for Mac. Of course, the same downward compatibility problem applies to writing stuff in AutoCAD for Windows using VLIDE.

If you’ve moved on completely from AutoCAD for Mac to BricsCAD (Mac), that’s not going to be a problem. Bircsys building a notably better product that’s significantly more compatible with the main game is not something anybody could reasonably condemn. However, but it’s something to bear in mind if you are hoping to write code that runs on both AutoCAD and BricsCAD for Mac.

Summary

That caveat aside, it’s all good news for Mac CAD users. You already had a product available that would run a much higher percentage of the huge library of LISP out there than AutoCAD for Mac would. For the first time in history, you now also have access to a professional LISP development tool. Lucky for you, it’s the best such tool on the market.

Why every AutoCAD CAD Manager should have a copy of BricsCAD – part 5, LISP

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This is the fifth post in this series where I explain why this statement holds true:

As a CAD Manager looking after AutoCAD users, or a power user looking after yourself, it’s worth your while to have a copy of BricsCAD handy.

This post is about BricsCAD being better than AutoCAD at the one thing that made AutoCAD win the race against its competitors back in the 80s – LISP. That is, AutoLISP (added fully to AutoCAD in Version 2.18) and Visual LISP (fully integrated with AutoCAD 2000).

If you’re a good AutoCAD CAD Manager, you’ll already know the reasons LISP is an extremely important tool, so I won’t cover them here. I may explain those reasons in a later post, but that would distract us from the main point. Why is having a copy of BricsCAD useful to a CAD Manager?

BLADE. I’ve covered the BricsCAD LISP Advanced Development Environment in various posts already, and I intend to go into greater detail in future posts. There are enough advantages over VLIDE to warrant an entire series of posts. This is simply the biggest advance for CAD LISP in 20 years; if you’re doing any reasonably complex development in LISP and you’re not BLADE, you’re wasting time and money.
Performance. Because BricsCAD’s LISP engine is much more modern than AutoCAD’s, the performance is much greater. In my experience, it’s about three times as fast. Some function calls are as much as 30 times as fast. If you have a user who’s complaining that your routine is taking an age to process in AutoCAD, try it in BricsCAD instead. I once saved a user half an hour in processing time for one polyline by using BricsCAD. Another aspect that will benefit you when programming and testing is BricsCAD’s generally superior performance. Got nothing running and want to get programming in the next 5 seconds? Fire up BricsCAD. Want to do a complex process on a big drawing that makes AutoCAD run out of RAM? Try it in BricsCAD.
Licensing. While you’re developing in BricsCAD, you’re not using up an expensive AutoCAD license. You’re using a cheaper (or even free, while you’re evaluating it) BricsCAD license. Also, it’s a perpetual license so if you ever stop paying, you can keep developing as long as you like. Oh, and it’s not going to flake out on you on those days where Autodesk’s subscription licensing server has a meltdown.
Extra functionality. BricsCAD’s LISP has the AutoLISP and Visual LISP functions and then some. Some of the DOSLib functions are available without even needing DOSLib, but if you need the full set of DOSLib functions they can be loaded, as per AutoCAD. A range of extended functions are available with the vle- prefix, and the LISP Developer Support Package documents these and provides the source code so you can also use them in AutoCAD.
Platform independence. AutoCAD for Mac has severely restricted LISP capabilities, making it unsuitable for use in a professional, efficient custom environment. BricsCAD for Mac and BricsCAD for Linux both provide practically identical functionality to the Windows version. Yes, BricsCAD for Mac really is significantly more AutoCAD-compatible than AutoCAD for Mac.

I do my LISP development in BricsCAD these days, and can attest that it’s well worth the investment in time to get the hang of BLADE.

It will cost you a few minutes to download and install of an evaluation BricsCAD and check out the LISP situation for yourself.

Edit: it’s not just LISP. See James Maeding’s comment below about .NET, too.

Steve’s BLADE presentation at the BricsCAD New Zealand and Australia Roadshow

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Sofoco (Australia) and CAD Concepts (New Zealand) recently ran a series of seminars throughout Australasia demonstrating BricsCAD. I attended the last of these in Brisbane on April 19 and gave a presentation about BricsCAD’s LISP, with reference to AutoCAD compatibility and the tools available to CAD Managers and developers, including BLADE. The talk was aimed at anybody who is writing or maintaining LISP code for AutoCAD or BricsCAD.

I had the just-before-lunch slot, which is never desirable for a presenter. People are dozing off and/or bursting to go to the toilet, and time adjustments have to be made if earlier presentations run over. I started 10 minutes late and therefore had to remove the demonstration part of the presentation on the fly, but I had planned to allow for that eventuality. It’s been a while since I have presented like this before an audience so I was a bit rusty and it wasn’t as free-flowing as I would have liked. Too many ‘erms’!

Steve’s invisible accordion is impressively large

I did manage to keep the whole audience in their seats until the end, though, so that’s something. Maybe the fact that I was waving a sword around had something to do with it.

Here’s my video, which is 21 minutes long. The sound is a bit muffled and my accent is Australian, so you might want to turn on subtitles using the CC option in the YouTube player.

Disclosure: the organisers covered part of my expenses.

Steve at the BricsCAD New Zealand and Australia Roadshow

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Sofoco (Australia) and CAD Concepts (New Zealand) are currently running a series of seminars throughout Australasia demonstrating BricsCAD.

Here are the dates and locations:

Auckland – 9 April 2018, Jet Park Hotel and Conference Centre
Christchurch – 11 April 2018, Christchurch Community House
Melbourne – 17 April 2018, Airport Motel and Convention Centre
Sydney – 18 April 2018, Stamford Plaza Sydney Airport
Brisbane – 19 April 2018, Royal on the Park

Each seminar is in two parts. The morning session is for leaders and decision makers and the the afternoon is less structured and goes into more details, with informal discussions, questions and answers and one-on-one sessions. There will be many short presentations from various presenters to demonstrate the different things that BricsCAD is capable of, with or without third party add-ons.

I’ll be travelling to the Brisbane show. I’ll be there for the whole day but will be doing a brief presentation about BricsCAD’s LISP, with reference to AutoCAD compatibility and the tools available to CAD Managers and developers, including BLADE.

I have experience not only in developing using LISP in AutoCAD and BricsCAD, but also in transitioning from one to the other in a comprehensively modified custom environment. I hope to be of some assistance to CAD Managers and users who are considering such a move. I believe there are still seats available.

Disclosure: the organisers will be covering part of my expenses.

BLADE – putting things back to “normal”

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Disclaimer: I’m making money using BLADE. I’m using it on a paying project right now (well, not while I’m typing this, but you get the idea). I’m developing a routine to automate a massively repetitive task for one of my AutoCAD-using clients, and I’m developing it in BricsCAD and BLADE rather than AutoCAD and VLIDE.

I can simply develop faster in the more modern environment, and BricsCAD’s significantly quicker start-up time helps with that. So does the fact that the routine runs several times faster in BricsCAD, making testing the large data sets much more efficient. I’m getting paid on results and not by the hour, so using BLADE is putting cash straight into my pocket while giving me more time to walk my dog.

Using BLADE in production, I’m discovering a few bugs, quirks and things I don’t like. That’s totally understandable with a new feature of this level of complexity and functionality. Where I think it makes sense, I’m submitting problem reports or feature requests to Bricsys. I’m sure Bricsys already has a bunch of these from other developers, so they’ll be very busy for a while. From past experience, I know my reports will be taken seriously and acted on appropriately in a timely manner, if it’s feasible to do so. Your LISP IDE feedback won’t be ignored for decades by Bricsys.

One of the things Torsten Moses mentioned to me that didn’t make it into the published interview was that many developers are very conservative. There’s some truth in that. I’m missing certain keystrokes, for example: 1978-era WordStar Ctrl-Y to delete a line, anyone? It’s a reasonable expectation that as more VLIDE users migrate to BLADE, many requests will come in for VLIDE-like things. I’m told that some of these things will be provided in coming months.

In the meantime, there are things we conservative developers can do to make ourselves feel more at home. One of these is to configure the editor appearance. Here’s the VLIDE editor:

Here’s the BLADE equivalent:

One of the great things about BLADE is how configurable it is, and I know Torsten’s working right now on making it even more so. Configurations are stored in the Registry in a version-independent location (HKCU\Software\Bricsys\BricsCAD\VLispDbgEditor). These can be exported and imported directly or via BLADE, so multiple complete setups and configurations can be managed.

In this post, I’m going to be going through the process of configuring BLADE’s editor appearance to make it look more like VLIDE. I’m not suggesting that’s necessary or even a good idea in most cases, but if you really want to do it, here’s how.

Note: before you do all this manually, please note that at the end of this post I will provide a configuration file that will do it for you.

Start up BricsCAD V18.2 or later and start BLADE using either the BLADE or VLIDE command.
Open a LISP file in BLADE so you can check the effects of the changes we’re going to make.
Use Preferences > Show preference dialog…
In the Preferences & Settings dialog, pick the Styles tab and the Lexer Styles sub-tab.
I’m perfectly happy with Courier New 10, but if you want the VLIDE look, change 1 – Default text to Fixedsys 11.
Click next to 3 – Comment, turn on the Background color toggle and change the Back Color to mid-grey (192,192,192) and Fore Color to dark magenta (128,0,128). You’ll need to specify that RGB value in the lower right corner and use Add to Custom Colors to do this.
Click next to 5 – String and change the Fore Color to magenta (255,0,255).
Click next to 7 – Operator and change the Fore Color to red (255,0,0).
The 8 – Keyword 1 setting should already be blue as in VLIDE. If you want system constants such as T, nil and pi to also be that shade of blue then change 9 – Keyword 2 accordingly. Personally, I prefer a different shade so they stand out. Mid-dark cyan (0,128,192) works well.
I like the pale grey background in BLADE that helps identify the current line. If you don’t, click next to 8 – Caret colour and turn off the Background color toggle.
Switch to the Editor Colors sub-tab, click next to 5 – Selection colour and change the Back Color to a custom mid-blue (0,120,215).
While you’re in the Editor Colors sub-tab, there are a few other non-VLIDE things you can play with. 1 – Brace hilight and 2 – Brace mismatch are dynamically applied to matching and non-matching parentheses respectively. I like my Brace hilight setting to be plum and bold (turn on the Attributes toggle to enable this):

I like my non-matching setting to be white on red (the inverse of a normal parenthesis so it shows up):

Changing all that should give you something that looks like this. Familiar enough?
There are several things in the above image that might be unfamiliar but which I suggest you leave turned on because they’re useful. If you really insist, here are the locations for these settings in the Preferences & Settings dialog:

Line numbers – View > Margins, Show line number margin
Marker margin – View > Margins, Show marker margin. If this is turned off, bookmarks show up using the settings under Styles > Editor Colors > 13 – Bookmark marker.
Edge marker (that vertical line on the right indicating 80 character width) – View > Edge marker > Type, No background.
Indentation guides (those vertical lines that show you what your code is lining up with) – Tabs and EOL > Indentation, Show indentation guides.
Code folding margin (the margin on the left that allows you to collapse functions, etc. – Folding and Wrapping > Show code folding margin.

Unlike VLIDE, the default in BLADE is to use spaces for indentation, not tabs. As I don’t know of any LISP developer who uses tabs except by accident, this is a much more sensible default. But if you really want to use tabs, turn it on using Preferences > Use tabs and set the width to the VLIDE default of 8 in Preferences > Set tab width.

If you’ve left opening parentheses on previous lines and have indented the following code as usual, then as you go on to finish off the code with closing parentheses, in BLADE a single backspace will take you back your indent width (2 spaces by default) rather than a single space as in VLIDE. If your coding finger can’t get used to this keystroke-saving feature, you can turn this off with Preferences > Backspace unindents.

Having done all that, and having arranged the rest of the interface to your needs (overall window size, pane and field widths, etc.), make sure you save it! It’s as simple as Preferences > Save preferences, but it’s not done automatically. If you want to keep a safe copy of your settings, you can do so with Preferences > Save preferences to file. This simply exports the relevant part of the registry to a .reg file of your choice. This is a text file you can hack about with at your leisure (using BLADE if you like!), and you can even make files that represent subsets of your preferences.

For example, I’ve removed all but the style settings from a .reg file I exported. I’ve uploaded it renamed as a .txt file because .reg files are considered dangerous by browsers, etc.

If you want to use this to give BLADE that old familiar VLIDE look, here are the steps.

Download SteveVLIDE-likeBLADEStyleSettings.reg.txt.
Rename the file to remove the .txt extension so it becomes SteveVLIDE-likeBLADEStyleSettings.reg.
In BLADE, use Preferences > Load Config from File
Close BLADE and BricsCAD.
Restart BricsCAD and BLADE.

That should do it. Happy BLADEwork!

Interviewing the creator of BLADE – CAD’s best LISP IDE – part 2

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This post continues my interview with Torsten Moses about BLADE, the new LISP IDE that arrived with BricsCAD V18.2. See here for post 1.

Steve: I’ve noted before that BricsCAD execution of AutoLISP and Visual LISP is several times faster than AutoCAD’s. How does the new technology affect that performance?

Torsten: All the new BLADE-related stuff doesn’t really affect normal LISP execution outside the IDE and debugger. The connection is made by a few callbacks, which take zero time in normal processing. Therefore there is also no chance of breaking things. The BLADE implementation is very safe, and performance remains high for normal usage. For the debugger and the synchronization, it is all home-brewed stuff, optimized for best performance even when debugging, and minimum system and LISP memory usage.

In the course of implementing the debugger and internal versus external synchronization, I also removed most emulations and implemented that as core OpenLisp functionality. That has the side-effect that the (repeat), (foreach) and (vlax-for) functions now run about five times faster at the loop construction. So rather than slowing things down, creating BLADE has actually speeded things up!

Steve: Will the Mac and Linux versions also get this feature?

Torsten: Yes, it is fully compatible. This is due to the implementations of WxWidgets and my own stuff. I have already verified BLADE running under Linux. There are no differences; even the implementation code has no Windows-specific stuff.

Steve: Can you give a simple example of the workflow of a debugging session?

Torsten: First, don’t pre-load any LISP file into BricsCAD. Such code loaded outside the debugger is fully functional, but it can’t be used for debugging. The special connection between internal and external representation is only established when loading the LISP code under a debug state.

Next, in BLADE open an existing FAS or VLX project, and/or a “Named Session”, or simply any LISP file you want to start debugging with.

Now you can select Start Debugging from menu or toolbar, or hit the F8 hotkey. The special Debug Toolbar will appear. You can either activate AutoBreak, which stops at first executable code, or activate the LISP source where you want to start debugging and place some breakpoints.

Then load the dedicated LISP file, either by the normal Load into BricsCAD function, or from the Load button in the Debug Toolbar. Now that loaded code is debug-enabled and you will see the file and debug-enabled functions in the two right tabs.

When the debugger halts at the first breakpoint, all debug-step modes are enabled in the toolbar, and you have all the usual debug step modes. More than in AutoCAD’s VLIDE, actually. You can set the watches (observed and tracked variables) as “Data Break Point” by activating the checkbox. Then, whenever that value changes, the debugger also stops automatically at the related LISP statement.

Steve: What if your code calls code in other files you haven’t loaded?

Torsten: Don’t worry about that. The debugger recognizes this and will ask to load the related LISP file on-demand. In normal LISP, you would get an unknown function error but the debugger catches this upfront. In fact, this is one of the high-end features – only load the primary LISP file, any further debugging into other files resolves by loading during the debugging session. This is very handy for dealing with complex apps – there’s no need to preload any other LISP source. I’m sure you’ve experienced Murphy’s Law, where the particular function you need is the one that’s not loaded. You won’t have that problem in BLADE.

Steve: Where to from here? Is this job done or is there still room for improvement?

Torsten: As BLADE is still a very young product, there is definitely a lot more to come. So far, the main target was to provide good debugging features, and a somewhat reasonable handling of projects, but not so much focusing on plain editor capabilities.

My to-do list still has a number of major key features to be implemented. We want to add a hotkey editor, because every developer loves his own keystrokes and learning others is a nightmare! We also want cross-reference checking on a per-file and per-session basis, mainly for bigger LISP applications.

Then, over time, the editor capabilities will be extended and improved, providing more features. One example is to provide an editor tooltip that shows a function signature and short help when hovering over a LISP function name.

And of course, I’m aware that when people start using this in production, a lot of feedback will arrive from developers in the form of wishes, hints for improvements and bug reports. It’s very likely there will be many wishes to implement several details to make BLADE resemble AutoCAD’s VLIDE more closely. This could be a bit difficult sometimes, and is also not the main target. I hope that developers will be open to a slightly different workflow, given the big advantages they get in return.

In general we are very open to developer ideas, needs and requirements, as we are with BricsCAD itself. In the end, it’s the developer who needs to work with BLADE, as easily and productively as possible. Even the initial release of BLADE is based on important feedback from beta testers such as Martin Drese (CAD Wiesel).

Steve: I can certainly attest to how well you respond to feedback. I’ve seen bugs I’ve reported fixed in a very short timeframe.

Torsten, thank you for your time. This has been very illuminating.

This interview is also available in one post on the Bricsys blog.

Interviewing the creator of BLADE – CAD’s best LISP IDE – part 1

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Easily the most impressive new feature of BricsCAD V18.2 is the new Visual LISP IDE, BLADE (BricsCAD LISP Advanced Development Environment). The lack of any LISP IDE has been a BricsCAD stumbling block for a while, dissuading CAD Managers from adopting BricsCAD to replace their stagnant and increasingly expensive AutoCADs.

As I will relate elsewhere, Bricsys has not just caught up with Autodesk here, but has shot so far ahead it’s unlikely to ever be caught. BricsCAD’s BLADE is so superior to AutoCAD’s VLIDE in so many ways there’s really no comparison.

Yet it remains highly compatible. I have personal experience in making large amounts of AutoCAD LISP code (literally hundreds of routines) work in BricsCAD. That experience tells me that the vast majority of code will work just fine (and much faster) in BricsCAD. A tiny proportion of LISP or DCL code may need adjustment before it will work perfectly on both platforms, and that’s one reason an IDE that works within BricsCAD was an important step that Bricsys needed to take.

I had the chance to see this IDE privately in then-unnamed pre-release form when I attended the Bricsys Conference 2017 in Paris. I was surprised and delighted at the functionality demonstrated by its creator, Torsten Moses. I recently had the chance to interview Torsten about his creation.

Steve: I understand it was difficult to create a LISP IDE for BricsCAD because of the way BricsCAD’s LISP works. Can you explain that?

Torsten: BricsCAD LISP uses the OpenLisp core system, from French developer Christian Jullien. This is the only LISP engine still under development; the others I found stopped development in the mid-90s.

OpenLisp is a very modern implementation, not comparable to the old XLisp dialect used by AutoLISP. Even object-oriented features are supported. Therefore the internal representation of LISP expressions is different from the textual representation as seen in a LISP file.

Steve: So the AutoLISP code I write isn’t the code that BricsCAD executes?

Torsten: That’s right. A number of typical AutoLISP constructions were implemented by a kind of emulation, which drives the internal versus textual representation differences even further. That makes it a major challenge to synchronize the internal OpenLisp expression execution with the related textual representation in order to provide any debugging functionality.

Besides the plain technical details, which seemed to be virtually unresolvable, there was the expected heavy effort to implement a full-blown GUI. This was not just a plain editor, but the entire IDE GUI. It would have been a disaster, a major disgrace, if we had provided a VLIDE that was just up to AutoCAD standards. That was great in its time, but it’s 20 years later now. The idea of creating a LISP IDE for BricsCAD seemed so filled with difficulties that we put it off for a long time.

Steve: How did you finally manage to overcome these difficulties?

Torsten: First, it was a pure coincidence. [laughs] By luck, I discovered a hidden detail in OpenLisp – any LISP symbol (and expressions are a kind of anonymous symbols) can hold unlimited, attached custom data, very similar to XData in DWG database objects. I even knew about that for many years, but never worked out the shortcut to ‘misuse’ this for the LISP expression execution to editor and debugger bidirectional connection. Some initial quick tests showed that this approach was very suitable.

By another coincidence, I discovered that WxWidgets (our cross-platform system, not only for GUI) already includes support for the famous Scintilla editor, an OpenSource editor engine, widely used by many editors. WxWidgets even provides two levels of wrappers – a plain, core wrapper, and a high-level wrapper class system. This fits perfectly into the WxWidgets logic.

But still, that is only plain editor support – not a GUI. Then I found a very suitable, extensible editor and GUI implementation, based on that WxWidgets Scintilla system – as Open Source under the WxWidgets license. Hence, we are allowed to use that source code in a commercial application. That editor is called wxStEdit.

I verified that this source was suitable for our LISP IDE, and put in a lot of extra work to extend it. wxStEdit development finished in around 2008, and it still was compiling and working mostly fine. Nevertheless, in the course of extending that GUI, I found and fixed a lot of defects at all related levels (Scintilla, WxWidgets Scintilla wrapper and wxStEdit).

So it was this set of coincidences that suddenly opened both wings of a big gate!

See here for part 2 of this interview.

This interview is also available in one post on the Bricsys blog.

Bricsys shows Autodesk how to do mid-term updates – again!

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BricsCAD V18.2 for Windows is out. The new stuff in this mid-term update is again showing up Autodesk’s lack of progress with its once-flagship product, AutoCAD. I’m sure Autodesk would love customers to accept that there’s only so much anyone can do with a DWG-based CAD product once it reaches a certain level of maturity. Customers should get used to nothing of significance being added year after year. Diminishing returns, and all that. Pay to continue using the product, but don’t expect it to get better.

What a shame for Autodesk, then, that Bricsys exists. By consistently providing a raft of significant improvements with each full and mid-term release, Bricsys shows up that idea as nonsense. It’s perfectly possible to keep improving CAD at a very rapid rate, particularly if you’re not worried about competing with other products in your range. There’s a reason AutoCAD’s parametrics are restricted to 2D, and BricsCAD’s 3D parametrics in a DWG product proves that the reason isn’t technical. It’s strategic. Also strategic is cutting the guts out of an already much-weakened AutoCAD team, because you would really prefer your customers to be using your trendier and/or more expensive products.

I should point out that BricsCAD V18 customers who have a perpetual license, even without maintenance, will be receiving V18.2 with all its improvements free of charge. Contrast that with Autodesk, which is, despicably, withholding even bug fixes from selected customers. Autodesk’s attitude to customers who aren’t constantly paying up front is one of utter contempt. Autodesk feels entitled to your money; Bricsys wants to earn it.

So what’s Bricsys done to earn your money with BricsCAD V18.2?

Mostly, it’s lots of relatively small-sounding things that add up to significant productivity enhancements. There are several items that are playing catch-up to AutoCAD, such as long-overdue in-place text editing. There are big performance improvements in drawings with PDF underlays due to a smart multi-resolution cache mechanism. The 3D-to-2D generation mechanism has also been significantly sped up. Constraints (2D and 3D, unlike AutoCAD) are easier to create. Several 3D direct modeling operations have been made easier. That also helps with sheet metal design, which has seen other improvements.

In Bricsys BIM V18.2, a lot of smarts have been added. The mechanism for converting CAD models (including those made in BricsCAD Shape) to BIM models, BIMIFY, already did some fascinatingly clever things, but that’s been improved further particularly in the areas of structural member and room recognition. For those of us in Australia, support for our steel sections is very welcome.

For me, that’s not the big news. Oh, no. The big news for me is a thing called BLADE – the BricsCAD LISP Advanced Development Environment.

If you’re a CAD Manager or in-house developer and you’ve been waiting until BricsCAD had VLIDE, wait no longer. But this isn’t just catch-up. This is a big leapfrog over Autodesk’s sadly neglected IDE for CAD’s primary user programming language. There’s so much good stuff in BLADE that I can’t hope to do it justice here, so I will be covering it extensively in future posts. For now, here’s a statement for you:

If you program in AutoLISP or Visual LISP, you should be doing it in BLADE.

It’s that good. Really. Watch this space for details.

The download is small, the install is fast, it won’t harm your AutoCAD installation, and you can evaluate it free for 30 days. Links:

cad nauseam

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Tag Archives: BLADE

The BLADE video watchlist

More BLADE videos

Addendum – Why every AutoCAD CAD Manager should have a copy of BricsCAD – part 1, fixing drawings

Video – who is that masked man?

Wielding BLADE on BricsCAD Unplugged

My Bricsys 2018 – getting there

Video – Steve on BricsCAD Unplugged

Mac users rejoice – at long last, a LISP IDE comes to OS X

What’s happened?

Significance

Compatibility

Summary

Why every AutoCAD CAD Manager should have a copy of BricsCAD – part 5, LISP

Steve’s BLADE presentation at the BricsCAD New Zealand and Australia Roadshow

Steve at the BricsCAD New Zealand and Australia Roadshow

BLADE – putting things back to “normal”

Interviewing the creator of BLADE – CAD’s best LISP IDE – part 2

Interviewing the creator of BLADE – CAD’s best LISP IDE – part 1

Bricsys shows Autodesk how to do mid-term updates – again!