5.1

Chapter02/Cargo.toml

@@ -3,4 +3,4 @@ name = "elevator"
 version = "1.0.0"
 
 [dependencies]
-
+floating-duration = "0.1.2"

Chapter02/src/main.rs

@@ -1,3 +1,9 @@
+extern crate floating_duration;
+use std::time::Instant;
+use floating_duration::{TimeAsFloat, TimeFormat};
+use std::time::SystemTime;
+use std::{thread, time};
+
 fn main()
 {
 
@@ -15,20 +21,36 @@ fn main()
    let mut floor_height: f64 = 0.0; // meters
    let mut floor_requests: Vec<u64> = Vec::new();
 
-   //4. Loop while there are remaining floor requests
+   //4. Parse input and store as building description and floor requests
+
+   //5. Loop while there are remaining floor requests
+   let mut prev_loop_time = SystemTime::now();
    while floor_requests.len() > 0
    {
-      //4.1. Update location, velocity, and acceleration
+      //5.1. Update location, velocity, and acceleration
+      let dt = prev_loop_time.duration_since(prev_loop_time)
+                             .expect("SystemTime::duration_since failed")
+                             .as_fractional_secs();
+      prev_loop_time = SystemTime::now();
 
-      //4.2. If next floor request in queue is satisfied, then remove from queue
+      location = location + velocity * dt;
+      velocity = velocity + acceleration * dt;
+      acceleration = {
+         let F = (up_input_voltage - down_input_voltage) * 8;
+         let m = 1200000;
+         -9.8 + F/m
+      };
 
-      //4.3. Adjust motor control to process next floor request
+      //5.2. If next floor request in queue is satisfied, then remove from queue
 
-      //4.4. Print realtime statistics
-   }
+      //5.3. Adjust motor control to process next floor request
 
-   //5. Print summary
+      //5.4. Print realtime statistics
+
+      thread::sleep(time::Duration::from_millis(10));
+   }
 
+   //6. Print summary
    println!("main");
 
 }