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fix: proportional speed scaling for +/- keys in bounce demo #262

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Merged
ryanbreen merged 1 commit into from
Mar 12, 2026
Merged

fix: proportional speed scaling for +/- keys in bounce demo #262

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12 changes: 10 additions & 2 deletions userspace/programs/src/bounce.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -432,10 +432,18 @@ fn run_window_loop(win: &mut Window, spheres: &mut [Sphere; NUM_SPHERES]) {
Event::KeyPress { ascii, .. } => {
match ascii {
b'+' | b'=' => {
for sphere in spheres.iter_mut() { sphere.impel(); }
// Scale all velocities up by ~15%
for sphere in spheres.iter_mut() {
sphere.vx = sphere.vx * 23 / 20;
sphere.vy = sphere.vy * 23 / 20;
}
}
b'-' => {
for sphere in spheres.iter_mut() { sphere.dampen(); }
// Scale all velocities down by ~15%
for sphere in spheres.iter_mut() {
sphere.vx = sphere.vx * 20 / 23;
sphere.vy = sphere.vy * 20 / 23;
}
}
_ => {}
}
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