salva2d 0.10.0

2-dimensional particle-based fluid dynamics in Rust.
Documentation 
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use std::fmt::{Display, Error, Formatter};

/// A timer.
#[derive(Copy, Clone, Debug, Default)]
pub struct Timer {
    enabled: bool,
    time: f64,
    start: Option<f64>,
}

impl Timer {
    /// Creates a new timer initialized to zero and not started.
    pub fn new() -> Self {
        Timer {
            enabled: false,
            time: 0.0,
            start: None,
        }
    }

    /// Enables this timer.
    pub fn enable(&mut self) {
        self.enabled = true;
    }

    /// Disables this timer.
    pub fn disable(&mut self) {
        self.enabled = false;
    }

    /// Resets the timer to 0.
    pub fn reset(&mut self) {
        self.time = 0.0
    }

    /// Start the timer.
    pub fn start(&mut self) {
        if self.enabled {
            self.time = 0.0;
            //self.start = Some(instant::now());
        }
    }

    /// Pause the timer.
    pub fn pause(&mut self) {
        if self.enabled {
            if self.start.is_some() {
                //self.time += instant::now() - start;
            }
            self.start = None;
        }
    }

    /// Resume the timer.
    pub fn resume(&mut self) {
        if self.enabled {
            //self.start = Some(instant::now());
        }
    }

    /// The measured time between the last `.start()` and `.pause()` calls.
    pub fn time(&self) -> f64 {
        self.time
    }
}

impl Display for Timer {
    fn fmt(&self, f: &mut Formatter) -> Result<(), Error> {
        write!(f, "{}s", self.time)
    }
}