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author | Adam Carpenter <gitlab@53hor.net> | 2019-07-09 15:14:04 -0400 |
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committer | Adam Carpenter <gitlab@53hor.net> | 2019-07-09 15:14:04 -0400 |
commit | 7e8ee5ed9cad6484e9f13f81731b102ced58402e (patch) | |
tree | 5395402ab07bbb5a659dbd68c701e22a1227202f /meap/meap-code/ch2/ch2-sensor-emulator.rs | |
download | learning-rust-7e8ee5ed9cad6484e9f13f81731b102ced58402e.tar.xz learning-rust-7e8ee5ed9cad6484e9f13f81731b102ced58402e.zip |
Init.
Diffstat (limited to 'meap/meap-code/ch2/ch2-sensor-emulator.rs')
-rwxr-xr-x | meap/meap-code/ch2/ch2-sensor-emulator.rs | 36 |
1 files changed, 36 insertions, 0 deletions
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);
+}
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