Enter graph data and test pygame

interactions.py

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+from math import pi, cos, sin
+
+import pygame, colorsys
+
+# === graph data ===
+
+# vertices as screen positions
+viewsize = 600
+shrink = 0.9
+vertices = [(viewsize*(1 + shrink*x)/2, viewsize*(1 + shrink*y)/2) for x, y in
+  [(0, 0)] + [(cos(-n*pi/5), sin(-n*pi/5)) for n in range(10)] + [(0, 0)]
+]
+
+# edges as vertex pairs
+edges = [
+  (0, 1), (0, 3), (0, 5), (0, 7), (0, 9),
+  (2, 8), (2, 6), (6, 10), (10, 4), (4, 8),
+  (2, 9), (2, 11), (2, 5),
+  (4, 1), (4, 9), (4, 7),
+  (6, 3), (6, 11), (6, 9),
+  (8, 5), (8, 11), (8, 1),
+  (10, 7), (10, 11), (10, 3),
+  (9, 3), (9, 5),
+  (1, 5), (1, 7),
+  (3, 7)
+]
+
+# cyclic edge adjacencies
+cyc_edge_adj = [
+  (0, 1), (1, 2), (2, 3), (3, 4), (4, 0),
+  (5, 10), (10, 11), (11, 12), (12, 6), (6, 5),
+  (6, 16), (16, 17), (17, 18), (18, 7), (7, 6),
+  (7, 22), (22, 23), (23, 24), (24, 8), (8, 7),
+  (8, 13), (13, 14), (14, 15), (15, 9), (9, 8),
+  (5, 9), (9, 19), (19, 20), (20, 21), (21, 5),
+  (4, 10), (10, 25), (25, 26), (26, 18), (18, 4),
+  (3, 15), (15, 29), (29, 28), (28, 22), (22, 3),
+  (2, 12), (12, 27), (27, 26), (26, 19), (19, 2),
+  (1, 24), (24, 25), (25, 29), (29, 16), (16, 1),
+  (0, 21), (21, 28), (28, 27), (27, 13), (13, 0),
+  (14, 11), (11, 23), (23, 20), (20, 17), (17, 14)
+]
+
+# === phase space ===
+
+litness = 30*[0]
+
+# === main loop ===
+
+if __name__ == '__main__':
+  # set up display and clock
+  pygame.display.init()
+  screen = pygame.display.set_mode((viewsize, viewsize))
+  pygame.display.set_caption('Preview')
+  clock = pygame.time.Clock()
+  
+  to_light = 0
+  while True:
+    for event in pygame.event.get():
+      if event.type == pygame.QUIT:
+        quit()
+    
+    litness[to_light] = 1.
+    for e in range(30):
+      pygame.draw.aaline(
+        screen,
+        tuple(255*c for c in colorsys.hsv_to_rgb(e/30., litness[e], 0.2 + 0.8*litness[e])),
+        vertices[edges[e][0]],
+        vertices[edges[e][1]],
+      )
+      litness[e] *= 0.9
+    
+    # step
+    to_light = (to_light + 1) % 30
+    pygame.display.flip()
+    clock.tick(24)