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Rename step_size() parameter for SmoothingStyle

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Robbert van der Helm 2022-09-04 18:20:28 +02:00
parent 17a928647e
commit 9f990cc3b9
1 changed files with 7 additions and 8 deletions
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15
src/param/smoothing.rs
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@ -68,23 +68,22 @@ impl SmoothingStyle {
/// [`SmoothingStyle::next()`] and [`SmoothingStyle::next_step()`] functions for details on how
/// these values should be used.
#[inline]
pub fn step_size(&self, current: f32, target: f32, steps_left: u32) -> f32 {
nih_debug_assert!(steps_left >= 1);
pub fn step_size(&self, current: f32, target: f32, steps: u32) -> f32 {
nih_debug_assert!(steps >= 1);
match self {
SmoothingStyle::None => 0.0,
SmoothingStyle::Linear(_) => (target - current) / (steps_left as f32),
SmoothingStyle::Linear(_) => (target - current) / (steps as f32),
SmoothingStyle::Logarithmic(_) => {
// We need to solve `current * (step_size ^ steps_left) = target` for
// `step_size`
// We need to solve `current * (step_size ^ steps) = target` for `step_size`
nih_debug_assert_ne!(current, 0.0);
((target / current) as f64).powf((steps_left as f64).recip()) as f32
((target / current) as f64).powf((steps as f64).recip()) as f32
}
// In this case the step size value is the coefficient the current value will be
// multiplied by, while the target value is multipled by one minus the coefficient. This
// reaches 99.99% of the target value after `steps_left`. The smoother will snap to the
// reaches 99.99% of the target value after `steps`. The smoother will snap to the
// target value after that point.
SmoothingStyle::Exponential(_) => 0.0001f64.powf(1.0 / steps_left as f64) as f32,
SmoothingStyle::Exponential(_) => 0.0001f64.powf(1.0 / steps as f64) as f32,
}
}