nowfound

Dev tools · January 10, 2026

AR

A real-time ballistic solver for moving targets under drag (C++)

Hi HN, I’m sharing a small open-source project I’ve been working on: a native C++ ballistic solver that computes launch angles to intercept moving targets in real time, under gravity and air drag. Instead of relying on vacuum assumptions, closed-form equations, or lookup tables, the solver formulates the intercept as a nonlinear problem and solves it numerically using time integration and iterative methods. The motivation came from game and simulation scenarios where simpler approaches tend to break down: - moving targets - strongly curved trajectories due to drag - real-time constraints The…

A real-time ballistic solver for moving targets under drag (C++) launched on January 10, 2026 with 5 votes, #3,400 of 14,584 launches that month and more than 75% of that year's launches.

Alternativestop 23% of January 2026

What it does

In the maker’s words, at launch

Hi HN, I’m sharing a small open-source project I’ve been working on: a native C++ ballistic solver that computes launch angles to intercept moving targets in real time, under gravity and air drag. Instead of relying on vacuum assumptions, closed-form equations, or lookup tables, the solver formulates the intercept as…

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