Nice quick demo of a "tape drawing" UI, where you use one hand to control the position of the pen, and the other hand to control the angle, allowing for precisely drawing both smooth curves and straight line segments.

I'd love to see this on the Remarkable 2

The VR demo in the comments was neat :)

Wow, that's a very cool concept!

@Chris Knott my interpretation was that ‘bringing the computer to us’ emphasizes human embodied skills by letting us adjust the curve ‘inputs’ / parameters at the speed of thought using our hands! Auto-fitting bezier curves to me feels like going back to treating the computer as a magical black box again instead of having both human and computer participate in the process 😄

What I mean was if you consider two input devices; the [light pens+screen+projector], and [physical tape+whiteboard+camera], then to me the second one makes better use of human's embodied skills because you can feel the tension between your hands, more intuitively peel off and re-stick mistakes etc. (it does have downsides such as creating waste). The motivating problem they identified in the video was how to digitise the tape images. In 1999 this maybe required inputting the data digitally in the first place (with hand tools), but nowadays you could also have the option of inputting the data with a camera. The end result is the basically the same; users can draw on the wall with their hands, but end up with a vector image on the computer system.

ah I see