Fix edge cases when drawing lines

src/main.rs

@@ -6,7 +6,7 @@ use macroquad::prelude::*;
 const THICKNESS: f32 = 2.0;
 const TAIL_LEN: usize = 250;
 
-#[derive(Clone,Copy)]
+#[derive(Clone,Copy, PartialEq)]
 struct Point {
     x: f32,
     y: f32,
@@ -117,9 +117,14 @@ impl Tail {
             let prev = self.previous(index);
 
             if self.head == index {
+                // Draw the head differently
                 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);
+                // Don't have lines that cross the whole screen while using 1D graph
+                draw_circle(point.x, point.y,THICKNESS, color);
+            } else if prev == self.points[self.head] {
+                // Prevent the tail from connecting to the head
+                draw_circle(point.x, point.y,THICKNESS, color);
             } else {
                 draw_line(point.x, point.y, prev.x, prev.y, THICKNESS, color);
             }
@@ -143,7 +148,7 @@ async fn main() {
     // Dot params 
     let mut y_displacement = 0.;
     let mut x_displacement = 0.;
-    let mut tail = Tail::new(Axis::One);
+    let mut tail = Tail::new(Axis::Two);
 
     // Selection box
     let mut inital_x_pos = 0.;