Method sample

examples/simple.rs:28–30

(&self, x: f32)

impl DataSource for SineWave {
    fn sample(&self, x: f32) -> f32 {
        (x * self.frequency * 2.0 * std::f32::consts::PI).sin()
    }
}

fn main() -> Result<(), Box<dyn std::error::Error>> {