From 7e8ee5ed9cad6484e9f13f81731b102ced58402e Mon Sep 17 00:00:00 2001 From: Adam Carpenter Date: Tue, 9 Jul 2019 15:14:04 -0400 Subject: Init. --- meap/meap-code/ch2/ch2-sensor-emulator.rs | 36 +++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100755 meap/meap-code/ch2/ch2-sensor-emulator.rs (limited to 'meap/meap-code/ch2/ch2-sensor-emulator.rs') diff --git a/meap/meap-code/ch2/ch2-sensor-emulator.rs b/meap/meap-code/ch2/ch2-sensor-emulator.rs new file mode 100755 index 0000000..afdc893 --- /dev/null +++ b/meap/meap-code/ch2/ch2-sensor-emulator.rs @@ -0,0 +1,36 @@ +use std::time; +use std::f64::consts::PI; +use std::thread; + +fn main() { + let mut sensor_array_state: f64 = 1.0; + + for step in 1.. { + pause(step); + let reading = take_reading(sensor_array_state); + print_reading(reading); + sensor_array_state += 0.05; + } +} + +fn pause(step: usize) { + let delay_ms = if step % 4 == 0 { + 500 + } else if step % 7 == 0 { + 1000 + } else { + 3 + }; + + let delay = time::Duration::from_millis(delay_ms); + thread::sleep(delay); +} + +fn take_reading(x: f64) -> f64 { + // sin(x) + sin(π / sin(πx)) + x.sin() + (PI / (x*PI).sin()).sin() +} + +fn print_reading(reading: f64) { + println!("{}", reading); +} -- cgit v1.2.3