3D CAD NEWS

The ignoble Pushmi-Pullyu (“push-me pull-you”) is a two-headed beast made famous by the Doctor Doolittle stories of the 19^th Century. The mythical animal is noted for its ability to do either two things at once or struggle to do nothing, and to oscillate between these two extremes. Our 21^st Century CAD equivalent is history-free feature-based 3D modeling. For years a few vendors struggled to gain market share with it (CoCreate and Kubotek come to mind), but suddenly Pushmi-Pullyu CAD has become the rage.

SpaceClaim got way more press than it deserved for its new “natural 3D design system” last year, then PTC embraced its inner pushmi-pullyu by buying CoCreate. Today Siemens PLM Software becomes the latest CAD company to abandon the CAD Reich gospel of parameters uber alles with the introduction of what it calls synchronous technology (as if there is something mysteriously asynchronous about using existing 3D CAD tools; but we digress).

The Pushmi-Pullyu, new mascot of Siemens PLM Solutions

No less an authority on these things than Dr. Ken Versprille, the father of NURBS and resident PLM guru at CPDA, says in a published quote (I’ll bet a dollar he was paid to write), “its ability to recognize current geometry conditions and localize dependencies in real time allows synchronous technology to solve for model changes without the typical replay of the full construction history from the point of edit.”

Ken's quote is a real mouthful, so let us translate for the SolidWorks bloggers among our readership: You don’t have to redraw the damn part to make a single damn change all the damn time anymore. The good doctor goes on to say that “… users will see dramatic performance gains. A 100 times speed improvement could be a conservative estimate.”

Wow! Models 100x faster than with Autodesk Inventor and probably 300x faster than CATIA? Siemens resellers must be doubled over with orgasmic spasms at the mere suggestion of such superior results, especially because this new technology will be added to both NX and Solid Edge. Maybe Solid Edge will actually sell some copies again.

When you get the previous word picture washed out of your mind, let us consider something a bit more serious. CAD pundits (self glamourously included as shown below) refer to the Big Four CAD Vendors: Autodesk, Dassault Systemes, Siemens PLM, and PTC. A year ago not one of these had history-free feature-based modeling; now two do. Not that long ago Autodesk and Dassault entered into a bidding war over Seemage; perhaps SpaceClaim just might survive long enough to be so lucky.

A self-proclaimed Leading CAD Pundit caught in the act of meditating on synchronous technology at COFES 2008.

Here, in no particular order, telling no particular story, are some photos from COFES 2008, which took place last week in Scottsdale, Arizona.


If COFES keynote speaker Karl Ulrich had pulled peanuts out of his pocket, most of the 300 in attendance would have gladly eaten from his hands. The summary of the chart on display is "don't spend so much time debating the merits of marginal and/or stupid projects" except that Ulrich said it like somebody who has a book on the subject coming out from Harvard Business School Press in 2009. That the need exists to say this in a power point and a book explains why innovation is a chimera in many manufacturing firms.




COFES co-founder and chief ramrod Brad Holtz swears on his grandmother's grave that the selection of green as the shirt color for COFES staff was totally unconnected to the selection of this year's conference theme of sustainability.



Bill Carrelli of Siemens PLM Software had a full house in the tech suite, but still wouldn't divulge what the big announcement coming April 22 is all about.




Most sports fans have heard of the San Diego Chicken. This is the San Diego Grouse, technical name Steveious Wolfeious.



Anton van den Hengel flew from Australia (where he is director of the Australian Center for Visual Technologies) to speak to COFES for five minutes during the Maieutic Parataxis session. Afterwards COFES attendees mobbed him like groupies at a rock concert.

More to come.

Once upon a time there was a general, an arms merchant, and a samurai. This is the story of how fate—with a little help from The CAD Society—brought them together.

Our story starts with a band of merchant-monks known as The Hungry Rats. They wanted to build a weapon that would offer 90% of the firepower of existing weapons at 10% of the price and would work on the new generation of weapon platforms just coming on the market. They did so, and as a result they created a grand army the likes of which had never before been seen.

The Merchant-Monks practicing their levitation.
The founders of Autodesk.

The General was a tall, likeable fellow who could be as nice or as mean as required by circumstances. He became known in his younger years as one who would speak his mind. Once when he was a young lieutenant he was fired for offering constructive criticism when none was requested. Not long after, the general who fired him brought him back, and he rose through the ranks to become general of a large army which built the weapons preferred by most soldiers, the army founded by the merchant-monks.

The General, testing new hardware.
Autodesk CEO Carl Bass, winner of the 2008 CAD Society Leadership Award.

The Arms Merchant never thought of himself as such. He preferred to think of himself as an entrepreneur who worked to enable a level playing field in times of war. The General once tried to bring shame upon this humble entrepreneur by naming him The Arms Merchant, who in turn accepted the new name as a badge of honor. For years The Arms Merchant supplied keys to all The General’s opponents. When the key was placed into the weapon built by the enemies, it allowed the weapon to use the same bullets as used in The General’s weapons. This was a wonderful benefit because millions of bullet makers were all creating bullets that worked in The General’s weapons, but few were making bullets that would work in each of the opponent’s weapons.

The Arms Merchant on a fishing trip.
Consultant Evan Yares, winner of The CAD Society’s 2008 Joe Greco Community Award.

The Samurai was a wise and gentle soul who only wielded his sword when his guitar could not solve a problem. Years ago, when the General was fresh out of military school and The Arms Merchant was an itinerant peddler, the Hungry Rats mentioned above asked The Samurai to solve a problem they had trying to build the weapon.

The Samurai went into hiding for weeks, meditating on the problem. When he came out, he spoke to them the code that answered all their problems. The merchant-monks became wealthy. They asked The Samurai to join their band, but he preferred life in the desert. After several years of disagreements over fees, a judge told the merchant-monks to pay The Samurai a handsome settlement, allowing him to continue to craft codes for other weapons and to play his guitar more often.

The Samurai, notoriously camera-shy, is spotted receiving guests in his desert hideaway.
Evolution Computing Chief Software Architect Mike Riddle, winner of the 2008 CAD Society Lifetime Achievement Award.

Years passed. The General turned his attention to building new weapons that would be nicer to the environment. The Arms Merchant was forced by his clients to stop selling keys after a thief was found in his camp. He found other ways to help small weapons builders and started to write his memoirs. The Samurai continued to meditate on codes and play his guitar. In time their work became known to The CAD Society, who decided they were as worthy as any to receive honor for their past exploits.

So, on the night of April 12, 2008, The General, The Arms Merchant, and The Samurai will gather under a tent in a desert oasis. Each will receive a trophy for their accomplishments, courtesy of The CAD Society, and they will set aside any thoughts of past animosity. All three owe a debt of gratitude to those merchant-monks.

The moral of the story is simple: Keep your friends close, and your enemies closer. You never know when the roles may change.