Laser rangefinder based touch wall from ’98

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It’s interesting to look back over the years and see various technologies applied to solving problems, but not finding favor until later….kind of like this 1997 effort on using a laser rangefinder to track touch points on a large surface and Microsoft’s TouchWall. The two implementations are different, but it’s interesting to see where the overlap is and how people have been struggling with coming up with low-cost touch solutions for awhile.