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A comment on Ask HN: Most interesting tech you built for just yourself?. Parent comment

Re:Ask HN: Most interesting tech you built for just yourself? by svara on Saturday April 29, 2023 @06:28AM (#35751665)
How do you get the x scaling right? You have to measure the speed of the train somehow?
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Re:Ask HN: Most interesting tech you built for just yourself? by dllu on Saturday April 29, 2023 @03:33PM (#35756292)
When the train is moving at a constant speed, you can just scale the image manually to make it just right. If it's moving at a non-constant speed, you can apply a spline or similar to remove the distortion.
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