feat: init the repo

src/cycle/ht_sine.rs

@@ -0,0 +1,29 @@
+use super::common::{compute_ht_core, HT_LOOKBACK};
+use numpy::{IntoPyArray, PyArray1, PyReadonlyArray1};
+use pyo3::prelude::*;
+use std::f64::consts::PI;
+
+/// Hilbert Transform SineWave. Returns (sine, leadsine) where leadsine leads sine by 45°.
+#[pyfunction]
+#[allow(clippy::type_complexity)]
+pub fn ht_sine<'py>(
+    py: Python<'py>,
+    close: PyReadonlyArray1<'py, f64>,
+) -> PyResult<(Bound<'py, PyArray1<f64>>, Bound<'py, PyArray1<f64>>)> {
+    let prices = close.as_slice()?;
+    let n = prices.len();
+    let core = compute_ht_core(prices);
+
+    let mut sine = vec![f64::NAN; n];
+    let mut lead_sine = vec![f64::NAN; n];
+
+    for i in HT_LOOKBACK..n {
+        if !core.dc_phase[i].is_nan() {
+            let phase_rad = core.dc_phase[i] * PI / 180.0;
+            sine[i] = phase_rad.sin();
+            lead_sine[i] = (phase_rad + PI / 4.0).sin(); // 45-degree lead
+        }
+    }
+
+    Ok((sine.into_pyarray(py), lead_sine.into_pyarray(py)))
+}