Yestino - The Signal · Laser Graffitihttps://yestino.com/zh-CN/entities/laser-graffiti-8399e5与 Laser Graffiti 相关的全部事件zh-CNShow HN: Laser Graffitihttps://yestino.com/zh-CN/events/show-hn-laser-graffiti-e08806https://yestino.com/zh-CN/events/show-hn-laser-graffiti-e08806Sat, 29 Aug 2026 12:28:11 GMTPoint a projector and a webcam at a wall, draw with a laser pointer, and the projector paints your strokes. 来源：Hacker News