use gradient of colors in path

src/ui/maze.py

@@ -25,9 +25,9 @@ COLORS = {
     "walls": (200, 200, 200),
     "path": (100, 0, 0),
     "path link": (80, 0, 0),
-    "path ends": (255, 165, 0),
     "path ends link": (255 * 0.7, 165 * 0.7, 0),
-    "path ends ends": (255, 0, 255),
+    "path start": (255, 165, 0),
+    "path end": (165, 0, 255),
     "pause": (255, 0, 0),
 }
 STYLE = {
@@ -211,9 +211,17 @@ class Canva:
                 y_b = (.5 + b // maze["width"]) * maze["size"]
 
                 if complete:
+                    p = i / (len(path) - 1)
+                    rs, gs, bs = COLORS["path start"]
+                    re, ge, be = COLORS["path end"]
+                    c = (
+                        p * rs + (1 - p) * re,
+                        p * gs + (1 - p) * ge,
+                        p * bs + (1 - p) * be,
+                    )
                     pygame.draw.line(
                         self.screen,
-                        COLORS["path ends link"],
+                        c,
                         (x_a, y_a),
                         (x_b, y_b),
                         width=int(maze["size"] * STYLE["link width"]),
@@ -227,24 +235,25 @@ class Canva:
                         width=int(maze["size"] * STYLE["link width"]),
                     )
 
+            for i, a in enumerate(path):
+                x_a = (.5 + a % maze["width"]) * maze["size"]
+                y_a = (.5 + a // maze["width"]) * maze["size"]
                 d = int(maze["size"] * STYLE["grid"].m)
                 r = int(maze["size"] * STYLE["grid"].r)
 
                 a = (x_a - d // 2, y_a - d // 2, d, d)
-                b = (x_b - d // 2, y_b - d // 2, d, d)
                 if complete:
-                    if i == 0:
-                        pygame.draw.rect(self.screen, COLORS["path ends ends"], a, border_radius=r)
-                        pygame.draw.rect(self.screen, COLORS["path ends"], b, border_radius=r)
-                    elif i == len(path) - 2:
-                        pygame.draw.rect(self.screen, COLORS["path ends"], a, border_radius=r)
-                        pygame.draw.rect(self.screen, COLORS["path ends ends"], b, border_radius=r)
-                    else:
-                        pygame.draw.rect(self.screen, COLORS["path ends"], a, border_radius=r)
-                        pygame.draw.rect(self.screen, COLORS["path ends"], b, border_radius=r)
+                    p = i / (len(path) - 1)
+                    rs, gs, bs = COLORS["path start"]
+                    re, ge, be = COLORS["path end"]
+                    c = (
+                        p * rs + (1 - p) * re,
+                        p * gs + (1 - p) * ge,
+                        p * bs + (1 - p) * be,
+                    )
+                    pygame.draw.rect(self.screen, c, a, border_radius=r)
                 else:
                     pygame.draw.rect(self.screen, COLORS["path"], a, border_radius=r)
-                    pygame.draw.rect(self.screen, COLORS["path"], b, border_radius=r)
 
         # walls
         h = [