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log scale for speed slider. thanks julian ;)

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This commit is contained in:
Dustin Carlino 2019-11-06 14:26:10 -08:00
parent 255a7f735d
commit 5b50cac80e
1 changed files with 14 additions and 9 deletions
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23
game/src/common/speed.rs
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@ -14,9 +14,9 @@ const PANEL_RECT: ScreenRectangle = ScreenRectangle {
y2: 150.0,
};
const ADJUST_SPEED: f64 = 0.1;
// TODO hardcoded cap for now...
const SPEED_CAP: f64 = 10.0 * 60.0;
const ADJUST_SPEED_PERCENT: f64 = 0.01;
// TODO hardcoded cap for now... 10 sim minutes / real second
const SPEED_CAP: f64 = 600.0;
pub struct SpeedControls {
slider: Slider,
@ -90,7 +90,8 @@ impl SpeedControls {
speed_up_btn.set_pos(ScreenPt::new(150.0, 50.0), 0.0);
let mut slider = Slider::new();
slider.set_percent(ctx, 1.0 / SPEED_CAP);
// Start with speed=1.0
slider.set_percent(ctx, (SPEED_CAP / 5.0).powf(-1.0 / std::f64::consts::E));
slider.set_pos(ScreenPt::new(0.0, 100.0), 150.0);
let (small_step_btn, large_step_btn, jump_to_time_btn) = if step_controls {
@ -148,11 +149,15 @@ impl SpeedControls {
let desired_speed = self.desired_speed();
if self.speed_up_btn.clicked() && desired_speed != SPEED_CAP {
self.slider
.set_percent(ctx, ((desired_speed + ADJUST_SPEED) / SPEED_CAP).min(1.0));
self.slider.set_percent(
ctx,
(self.slider.get_percent() + ADJUST_SPEED_PERCENT).min(1.0),
);
} else if self.slow_down_btn.clicked() && desired_speed != 0.0 {
self.slider
.set_percent(ctx, ((desired_speed - ADJUST_SPEED) / SPEED_CAP).max(0.0));
self.slider.set_percent(
ctx,
(self.slider.get_percent() - ADJUST_SPEED_PERCENT).max(0.0),
);
} else if self.slider.event(ctx) {
// Keep going
}
@ -260,6 +265,6 @@ impl SpeedControls {
}
fn desired_speed(&self) -> f64 {
self.slider.get_percent() * SPEED_CAP
SPEED_CAP * self.slider.get_percent().powf(std::f64::consts::E)
}
}