wallpaper generator :§

waves.py

@@ -2,38 +2,47 @@
 
 import cairo
 import math
+import datetime
+import calendar
+import random
 from utils import random_color
 
 
 # dimensions of the output image
 WIDTH, HEIGHT = 1920, 1080
-# numbers of waves
-WAVES = 12
 # how much should the phases be offset?
-WAVE_OFFSET = 0 - (math.pi/4)#-1.9 
+WAVE_OFFSET = math.pi / random.choice([1, 2, 4]) #-1.9 
 # amplitude of the sine wave
-AMPLITUDE = 50
+#AMPLITUDE = 9
 # only 1 color with shades?
 MONOCHROME = True
 # works only if monochrome is set - uses todays date as base for the color
 DATE_BASED_COLOR = True
+DATE_BASED_AMPLITUDE = True
+DATE_BASED_COUNT = True
 # background black? White otherwise:
 DARK_BG = True
 # precision of the calculation
 PRECISION = 10000
 
-def todays_color():
-    import datetime
+def days_color(date):
     import colorsys
-    import calendar
     # a day between 1 and 365 (inclusive)
-    today = datetime.datetime.now().timetuple().tm_yday
-    year = datetime.datetime.now().year
+    today = date.timetuple().tm_yday
+    year = date.year
     days_in_year = 365 + calendar.isleap(year)
     # between 0 and 1, how far through the year are we?
     progress = today/days_in_year
     return colorsys.hsv_to_rgb(progress, 1, 1)
-    
+
+def days_amp(date, waves):
+    day = date.day
+    days_in_month = calendar.monthrange(date.year, date.month)[1]
+    max_amp = 1/waves/2
+    return day/days_in_month * max_amp
+
+def days_count(date):
+    return date.month
 
 def main():
     
@@ -42,10 +51,20 @@ def main():
 
     ctx.scale(WIDTH, HEIGHT)  # Normalizing the canvas
 
-    wave_height = 1/WAVES
     step_size = 1/PRECISION
-
     lastpoints = [(x/PRECISION, 0) for x in range(PRECISION+1)]
+
+    #date = datetime.datetime.strptime('2021-01-01', '%Y-%m-%d')
+    date = datetime.datetime.today()
+    frequency = random.randint(10, 40)
+    if DATE_BASED_COUNT:
+        waves = days_count(date)
+    else:
+        waves = 12
+    if DATE_BASED_AMPLITUDE:
+        amplitude = days_amp(date, waves)
+    else:
+        amplitude = 25
     if DARK_BG:
         # make bg black
         ctx.rectangle(0, 0, 1, 1)
@@ -53,17 +72,21 @@ def main():
         ctx.fill()
     
     if MONOCHROME:
-        r, g, b = random_color()
-        alpha_step = 1/WAVES
+        if DATE_BASED_COLOR:
+            r, g, b = days_color(date) #datetime.datetime.now())
+        else:
+            r, g, b = random_color()
+        alpha_step = 1/waves
 
-    for num in range(WAVES+1):
+    wave_height = 1/waves
+    for num in range(waves+1):
         if not MONOCHROME:
             r, g, b = random_color()
         points = []
         x = 0
         while x < 1:
-            y = math.sin(x*AMPLITUDE + (num * WAVE_OFFSET) ) * 0.1 
-            points.append((x, ( (y/4) + ((0.5+num)*wave_height))))
+            y = amplitude * math.sin(frequency * x + (num * WAVE_OFFSET) ) 
+            points.append((x, ( (y) + ((0.5+num)*wave_height))))
             x += step_size
         print(f'Draw {len(points)} points for curve {num}')
         if not MONOCHROME: