The idea of a fixed laser line and a turntable is not bad and not new. The core of DAVID3 is even able to do that, but we have never included it into the user interface. As Gunter wrote, it would require a precise calibration of the laser position and the turntable movement. We have abandoned these possibilities because
- other things always were more important
- requires special hardware that most users don't have
- requires lots of changes in the GUI
For now, there are other scanners who can do that.
The main disadvantage is that you will get only those surface regions that "point outward" ... e.g. a simple object like a coffee cup would work, but the inside of the handle would not be scanned. A more complex object would have many holes in the scan...
SL is much better in most cases.
@Gunter: Shapefusion indeed would not "accept" scans of only one line because one line contains no triangle faces, just vertices. This problem can be solved, but it's just not meant to be used this way. The best way would be to create one scan 360°. Note: This scan could not be shown as one plain "depth image" as it is now. It could be a cylindrical depth image... I'm just saying this changes a lot inside DAVID