cad nauseam

Congratulations to Ed Martin, who won the selfie contest with this entry:

1. This is Don Strimbu – a tricky angle on the picture, but his smile gives it away
2. He’s famous for the drawing of a nozzle – a fire hose nozzle to be precise – that he drew in 1984
3. Don used block scaling to simulate a 3D effect on the text, knurling, and fins
4. Autodesk used the drawing in its promotional material starting with an ad in the September 1984 issue of Scientific American
5. Don is now promoting products from Bricsys, notably their BricsCAD product
6. Wow, I really don’t know how long it took him, and it would be cheating to ask him … so I’ll guess. 18 hours?

Some clarifications:

1. Indeed it is Don. It was a privilege to meet him at the recent Bricsys International Conference in Munich, among other notables.

2. Correct, NOZZLE.DWG (we were all upper case 8.3 filenames at the time) which is quite possibly the most famous AutoCAD drawing of all time. It was the first complicated drawing ever done with AutoCAD, and was done in 1983 (not 1984), according to John Walker. See The Autodesk File for more information.

3. Yes, it was block scaling. In addition to the 3D effect, the thing Don came up with that amazed John Walker was using negative scale factors to achieve the equivalent of the MIRROR command. That command didn’t exist at the time, along with object snap and a bunch of other things it would be difficult to imagine life without these days.

4. Yes, it was also on Autodesk’s Task Force Tips’ letterhead for a while…

5. Yes, Don and former Autodesk Senior Vice President Dr. Malcolm Davies (also at Munich) are important figures at Techevate, enthusiastic promoters of BricsCAD in the USA.

6. 18 hours is a bit off. How about 400 40?

I remember using NOZZLE.DWG as a benchmark for comparing AutoCAD hardware back in the 80s. Open the drawing, enter REGEN and see how long it takes to get a command prompt back again. As every single zoom or pan required a regeneration back then, regen time was very important. I remember an HP Vectra taking 17 seconds and an NEC APC III taking 19. An IBM PC without math co-processor took much longer; 2 minutes 39 rings a bell, but I’m not certain. These days, it’s so fast it’s hardly measurable.

Anyway, I look forward to seeing what Ed has to say in this blog’s first ever guest posting. Could be anything!