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A comment on Show HN: I made a spreadsheet where formulas also update backwards.

Re:Show HN: I made a spreadsheet where formulas also update ... by injidup on Friday December 12, 2025 @11:35PM (#46252016)
A 2d sketcher with constraints is kind of similar. For example the equation

A = B + C

Where A, B, C are the lengths of 3 parallel lines. Within the sketcher you can drag the length of any one of those lines and the other two will adjust to keep the constraints.

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Re:Show HN: I made a spreadsheet where formulas also update ... by fouronnes3 on Saturday December 13, 2025 @02:11AM (#46252696)
Yes! I'd really like to make something graphical in this same idea space next. See g9.js for example, or parametric CAD software like FredCAD which kinda does what you said.
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