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914World.com _ 914World Garage _ A little CGI for you guys

Posted by: Optimusglen Jul 9 2020, 10:11 AM

I thought you guys might like this. I've created probably 5 or 6 different 914 3D models in my time, each with increased accuracy, but all had an element of "eye-balling" it.

Through a project I'm on I was able to get 3D scan data from a car and have been modeling up the most accurate model I've done to date. It's a long road ahead, but the body will be right on once it's finished.

For the uninitiated, a 3D scan creates a point cloud which can pretty easily be converted to a polygon model (millions of little flat polygons) To create a true CAD (nurbs) model you essentially model over the poly model, picking up key points as you move along to ensure the new geometry is as close as possible to the scanned geometry. Think of it like tracing over a photo with tracing paper. The new CAD geometry is what they call class-A surfaces, it takes quite a bit of work to get the new surfaces to match the scan but also be smooth (scan data has a lot of noise)

Oak green-ish color is the new geometry, matte blue is the scan.

IPB Image

The new model will be used to design and mock up some new modification options, stay tuned!

Posted by: BPic Jul 9 2020, 10:18 AM

Very Cool!!!

Posted by: MM1 Jul 9 2020, 12:46 PM

Nice! I used to scan/clay model for an OEM before I became a Digital Sculptor/Modeler . . .would love to have a copy so I could mock up drivetrain options in VR (Gravity Sketch)!

Years ago I had a scan of a real 550 Spyder . . .if I could just find it, I could trade ya!

It's quite exciting that you are working towards a nurbs model from scan - it would be great if our community had access to something close to a complete production dataset . . .I wonder if Porsche has even devoted the (hu)man-hours to create one?

Posted by: Superhawk996 Jul 9 2020, 01:22 PM

Nice Job.

Your next assignment is to by a Schuler transfer press (larger than my house ) and tool up the dies to make a complete 914 reproduction.

Posted by: SKL1 Jul 9 2020, 02:04 PM

I have NO idea what you're talking about but the images do look pretty neat...

Posted by: Carbon-14 Jul 9 2020, 08:39 PM

3.8L

Multiple intersection data.

Photogrammetry, a new approach to processing data, 3D data from photos, multiple photos.
https://www.geodetic.com/basics-of-photogrammetry/
https://www.3dnatives.com/en/photogrammetry-software-190920194/
https://all3dp.com/1/best-photogrammetry-software/
https://www.hemmings.com/classifieds/cars-for-sale/porsche/914/2413027.html
https://bringatrailer.com/listing/custom-porsche-914-race-car-3-8l/
https://sketchfab.com/3d-models/porsche-911-speedster-2019-heritage-16a0ffb8324d40a5bb7d63701bea4626__Left click drag model for 3D simulation.
https://www.hemmings.com/stories/2020/07/08/if-porsche-hadnt-flipped-out-over-the-idea-of-jump-seats-in-the-914-it-mightve-looked-like-this
https://www.ebay.com/itm/1970-Porsche-914-6/283931555536?hash=item421ba3b6d0:g:tbIAAOSwpnRe-jpQ

Using an array of photos, and the software above, it is now possible to build a 3D model of data to be processed by cnc tools or 3D printers,
useful for further refinement or modifications.
A worthwhile and naturally, valuable data of the 914, the measurements, like in the days of old, 38-26-36.
The shape of it.