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A comment on Show HN: A 2D Physics Simulator in JavaScript. Parent comment

Re:Show HN: A 2D Physics Simulator in JavaScript by santaclaus on Thursday July 27, 2017 @12:40PM (#14866963)
> physics programs are supposed to offer interactivity. Else whats the point?

To solve differential equations for which analytical solutions do not exist?

Edit: Differential inclusions, if inequality constraints are included in the system (as they would here).

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Re:Show HN: A 2D Physics Simulator in JavaScript by laythea on Thursday July 27, 2017 @12:48PM (#14867035)
Of course it depends on what the goal of the program is, but something like this should offer user interactivity. By solving whatever is necessary (or faking it).
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