some sort of ui

crates/engine/src/lfo.rs

@@ -0,0 +1,38 @@
+#[derive(Clone, Copy)]
+pub enum LfoMode {
+    FreeRun,
+    BpmSync,
+    OneShot,
+    Envelope,
+}
+
+pub struct Lfo {
+    pub phase: f32,
+    pub rate: f32,
+    pub depth: f32,
+    pub mode: LfoMode,
+    pub wave_pos: f32,
+    pub sync: bool,
+    sample_rate: f32,
+}
+
+impl Lfo {
+    pub fn new(sr: f32) -> Self {
+        Self {
+            phase: 0.0,
+            rate: 1.0,
+            depth: 1.0,
+            mode: LfoMode::FreeRun,
+            wave_pos: 0.0,
+            sync: false,
+            sample_rate: sr,
+        }
+    }
+    pub fn retrigger(&mut self) {
+        self.phase = 0.0;
+    }
+    #[inline]
+    pub fn tick(&mut self, _host_bpm: f32) -> f32 {
+        0.0
+    }
+}