Got rid of frameskipping because it wasn't working, fixed inaccuracies in delta time, added relative time for interpolation

Cargo.lock

@@ -103,7 +103,7 @@ dependencies = [
 ]
 
 [[package]]
-name = "loopcore"
+name = "hypoloop"
 version = "0.1.0"
 dependencies = [
  "futures",

Cargo.toml

@@ -1,5 +1,5 @@
 [package]
-name = "loopcore"
+name = "hypoloop"
 version = "0.1.0"
 edition = "2018"
 

src/main.rs

@@ -1,6 +1,5 @@
 use std::time::Instant;
-const UPDATE_INTERVAL: u32 = 40;
+const UPDATE_INTERVAL: u32 = 80;
-const MAX_FRAMESKIP: u32 = 5;
 
 fn main() {
     // track the delta time (the duration of the previous loop in milliseconds)
@@ -12,11 +11,21 @@ fn main() {
         // start per-loop delay timer
         let timer = Instant::now();
 
-        // track the number of update ticks
+        // update
-        let mut ticks: u32 = 0;
+        if delta_time >= UPDATE_INTERVAL {
+            println!("Updating");
+            update();
 
-        update(&mut delta_time, &mut ticks);
+            // DEBUG
 
+            // reset the delta time
+            delta_time = timer.elapsed().as_millis() as u32;
+        }
+
+        // support interpolation via fractional "relative time"
+        let relative_time: f32 = delta_time as f32 / UPDATE_INTERVAL as f32;
+
+        println!("Displaying | Delta Time: {}ms | Relative Time: {}", delta_time, relative_time);
         display();
 
         // update the delta time
@@ -27,24 +36,13 @@ fn main() {
 
 // update function
 // TODO - I think I'm resetting delta time in the wrong place or just using it incorrectly; frameskips aren't happening at all
-fn update(delta_time: &mut u32, ticks: &mut u32) {
+fn update() {
-    // keep going even if frames aren't displaying, but halt if there are too many frameskips
+    waste_time(64);
-    while *delta_time >= UPDATE_INTERVAL && *ticks < MAX_FRAMESKIP {
-        println!("Updating...");
-        waste_time(64);
-
-        // record the tick
-        *ticks += 1;
-     
-        // reset the delta time
-        *delta_time = 0;
-    }
 }
 
 // render function
 fn display() {
-    println!("Displaying...");
+    waste_time(4);
-    waste_time(32);
 }
 
 // 1D linear interpolation