add precision

waves.py

@@ -17,6 +17,8 @@ AMPLITUDE = 25
 MONOCHROME = True
 # background black? White otherwise:
 DARK_BG = True
+# precision of the calculation
+PRECISION = 10000
 
 def main():
     
@@ -26,7 +28,9 @@ def main():
     ctx.scale(WIDTH, HEIGHT)  # Normalizing the canvas
 
     wave_height = 1/WAVES
-    lastpoints = [(x/1000, 0) for x in range(1000)]
+    step_size = 1/PRECISION
+
+    lastpoints = [(x/PRECISION, 0) for x in range(PRECISION+1)]
     if DARK_BG:
         # make bg black
         ctx.rectangle(0, 0, 1, 1)
@@ -45,7 +49,8 @@ def main():
         while x < 1:
             y = math.sin(x*AMPLITUDE + (num * WAVE_OFFSET) ) * 0.1 
             points.append((x, ( (y/4) + ((0.5+num)*wave_height))))
-            x += 0.001
+            x += step_size
+        print(f'Draw {len(points)} points for curve {num}')
         if not MONOCHROME:
             ctx.set_source_rgb(r, g, b)
         else:
@@ -54,9 +59,10 @@ def main():
         ctx.move_to(*points[0])
         for p in points[1:]:
             ctx.line_to(*p)
-        ctx.set_line_width(0.002)
+        ctx.set_line_width(step_size)  #0.002)
         ctx.stroke()
         # fill area above
+        ctx.set_line_width(step_size)
         for pos in range(len(points)):
             ctx.move_to(*points[pos])
             ctx.line_to(*lastpoints[pos])