Use 'b' to cycle through bg colors.

README.md

@@ -17,7 +17,8 @@ Star field simulation.
 - **<kbd>m</kbd>** Switch between static color and cycle color mode
 - **<kbd>n</kbd>** Cycle through preset colors in static color mode
 - **<kbd>p</kbd>** Pause
- - **<kbd>r</kbd>** Toggle random moving center point
+- **<kbd>r</kbd>** Toggle random moving center point
+- **<kbd>b</kbd>** Cycle through preset background colors
 - **<kbd>d</kbd>** Reset to defaults
 - **<kbd>0123456789</kbd>** Set speed 0 fast to 9 slow
 - **<kbd>shift 0123456789</kbd>** Set number of stars 0 max to 9 minimum

star_field/star_field.py

@@ -14,12 +14,22 @@
 COLOR_BLACK = (0, 0, 0)
 COLOR_LIST = ["white", "red", "green", "blue", "cyan", "magenta",
  "yellow", "teal", "orange", "purple"]
+BG_COLOR_NAMES = [
+ "black", "red", "green", "blue", "cyan", "yellow", "magenta",
+ "teal", "orange", "purple", "white", "gray",
+]
+BG_COLOR_DICT = {
+ "white": (200, 200, 200), "red": (128, 0, 0), "green": (0, 128, 0),
+ "blue": (0, 0, 128), "cyan": (0, 128, 128), "magenta": (128, 0, 128),
+ "yellow": (128, 128, 0), "teal": (0, 140, 100), "orange": (128, 64, 0),
+ "purple": (95, 0, 128), "black": (0, 0, 0), "gray": (90, 90, 90),
+}
 MODES = ["solid_color", "cycle_color"]
 
 
 class StarColor:
  def __init__(self):
- self.total_num_color_shades = 12
+ self.total_num_color_shades = 9
  self.color_dict = {"white": (255, 255, 255), "red": (255, 0, 0),
  "green": (0, 255, 0), "blue": (0, 0, 255),
  "cyan": (0, 255, 255), "magenta": (255, 0, 255),
@@ -127,7 +137,7 @@ def get_key_pressed() -> str:
  pygame.K_p: "p", pygame.K_n: "n", pygame.K_f: "f",
  pygame.K_d: "d", pygame.K_DOWN: "down",
  pygame.K_UP: "up", pygame.K_LEFT: "left",
- pygame.K_RIGHT: "right", pygame.K_r: "r"}
+ pygame.K_RIGHT: "right", pygame.K_r: "r", pygame.K_b: "b"}
  for k in look_for.keys():
  if keys[k] and (keys[pygame.K_LSHIFT] or keys[pygame.K_RSHIFT]):
  return f"S {look_for[k]}"
@@ -147,8 +157,6 @@ def star_field_loop(win: pygame.Surface, args: argparse.Namespace) -> None:
  direction_list = make_direction_list()
  star_colors = StarColor()
  clock = pygame.time.Clock()
- win.fill(color=COLOR_BLACK)
- pygame.display.update()
  color_number = 0
  color_mode = 0
  cycle_count = 2000
@@ -157,7 +165,9 @@ def star_field_loop(win: pygame.Surface, args: argparse.Namespace) -> None:
  center_adjust_y = 0
  random_center_adjust = False
  pause = False
-
+ bg_color_number = 0
+ win.fill(color=BG_COLOR_DICT[BG_COLOR_NAMES[bg_color_number]])
+ pygame.display.update()
  stars = []
  for _ in range(10):
  s = Star(width,
@@ -215,6 +225,7 @@ def star_field_loop(win: pygame.Surface, args: argparse.Namespace) -> None:
  cycle_color = 0
  center_adjust_y = center_adjust_x = 0
  random_center_adjust = False
+ bg_color_number = 0
  elif key_pressed == "n" and MODES[color_mode] == "solid_color":
  if color_number < len(COLOR_LIST) - 1:
  color_number += 1
@@ -236,6 +247,11 @@ def star_field_loop(win: pygame.Surface, args: argparse.Namespace) -> None:
  center_adjust_y = center_adjust_x = 0
  else:
  random_center_adjust = True
+ elif key_pressed == "b":
+ if bg_color_number == len(BG_COLOR_NAMES) - 1:
+ bg_color_number = 0
+ else:
+ bg_color_number += 1
  elif key_pressed == "up" and not random_center_adjust:
  if center_adjust_y > -(height // 2 - 25):
  center_adjust_y -= 20
@@ -272,7 +288,7 @@ def star_field_loop(win: pygame.Surface, args: argparse.Namespace) -> None:
  elif MODES[color_mode] == "cycle_color" and not pause:
  cycle_count -= 1
  if not pause:
- win.fill(COLOR_BLACK)
+ win.fill(color=BG_COLOR_DICT[BG_COLOR_NAMES[bg_color_number]])
  for star in stars:
  star.draw_star()
  if star.remove_star():