Change from dots to lines

This removes the need for Dot (now Point) to hold rendering logic

src/main.rs

@@ -3,21 +3,18 @@ use std::io::stdin;
 
 use macroquad::prelude::*;
 
-const DOT_RADIUS: f32 = 2.0;
+const THICKNESS: f32 = 2.0;
 const TAIL_LEN: usize = 250;
 
 #[derive(Clone,Copy)]
-struct Dot {
+struct Point {
     x: f32,
     y: f32,
 }
-impl Dot {
+impl Point {
     fn new(x: f32, y: f32) -> Self {
         Self {x,y}
     }
-    fn draw(&self, color: Color) {
-        draw_circle(self.x, self.y,DOT_RADIUS, color);
-    }
 }
 
 struct DebugWindow {
@@ -53,7 +50,7 @@ enum Axis {
     Two
 }
 struct Tail {
-    points: [Dot; TAIL_LEN],
+    points: [Point; TAIL_LEN],
     head: usize,
     axis: Axis,
     /// What the tail treats as 0
@@ -71,7 +68,7 @@ impl Tail {
         };
         Self {
             // start all the dots off screen
-            points: [Dot::new(-1.,-1.); TAIL_LEN],
+            points: [Point::new(-1.,-1.); TAIL_LEN],
             head: 0,
             axis,
             x_offset,
@@ -88,15 +85,15 @@ impl Tail {
                 } else {
                     self.x_offset = self.x_offset + (delta_time * self.px_per_s)
                 }
-                self.push(Dot::new(self.x_offset, self.y_offset+y_displace));
+                self.push(Point::new(self.x_offset, self.y_offset+y_displace));
             },
             Axis::Two => {
                 // both x and y will get displaced
-                self.push(Dot::new(self.x_offset+x_displace,self.y_offset+y_displace))
+                self.push(Point::new(self.x_offset+x_displace,self.y_offset+y_displace))
             },
         }     
     } 
-    fn push(&mut self, dot: Dot) {
+    fn push(&mut self, dot: Point) {
         if self.head >= self.points.len() -1 {
             self.head = 0
         } else {
@@ -106,21 +103,37 @@ impl Tail {
         self.points[self.head] = dot;
     }
     fn draw(&self) {
-        self.points.into_iter().enumerate().for_each(|(index, dot) |{
+        self.points.into_iter().enumerate().for_each(|(index, point) |{
+            // dots fade
             let virtual_index = if index > self.head {
                 index-self.head
             } else {
                 index + (self.points.len() - self.head)
             };
-            
             let faded = virtual_index as f32 / self.points.len() as f32;
             let faded_inverse = 1. - faded;
+            let color = Color { r: faded_inverse, g: faded, b: 0.2, a: faded+0.1};
 
-            // dots fade
-            dot.draw(Color { r: faded_inverse, g: faded, b: 0.2, a: faded+0.1});
+            let prev = self.previous(index);
+
+            if self.head == index {
+                draw_circle(point.x, point.y,THICKNESS*2., color);
+            } else if point.x == 0. || point.y == 0. || prev.x == -1. || prev.y == -1. {
+                draw_circle(point.x, point.y,THICKNESS/2., color);
+            } else {
+                draw_line(point.x, point.y, prev.x, prev.y, THICKNESS, color);
+            }
         });
     }
-    fn dots(&self) -> usize {
+    fn previous(&self, index: usize) -> Point {
+        let prev = if index > 0 {
+            index -1
+        } else {
+            self.points.len() -1
+        };
+        self.points[prev]
+    }
+    fn points(&self) -> usize {
         self.points.len()
     }
 }
@@ -189,7 +202,7 @@ async fn main() {
         if show_debug {
             let mut debug = DebugWindow::new();
             debug.add_line(format!("FPS {}, Latency {:.2}ms", get_fps(), delta_time * 1000.0));
-            debug.add_line(format!("Dots {}", tail.dots()));
+            debug.add_line(format!("Points {}", tail.points()));
             debug.add_line(format!("Cursor Pos {:?}", mouse_position()));
             debug.draw();
         }