sync with current state

apps/sinic2.py

@@ -0,0 +1,68 @@
+#!/usr/bin/env python3
+
+import numpy as np
+import os
+import sys
+import time
+import colorsys
+
+Nx = int(sys.argv[1])
+Ny = int(sys.argv[2])
+iterations = 2
+
+class Slider:
+    def __init__(self, lo, hi, step, pos=0):
+        self.lo = lo
+        self.hi = hi
+        self.stepSize = step
+        self.pos = pos
+        self.dir = 1
+    
+    def step(self):
+        if self.pos >= self.hi:
+            self.dir = -1
+        elif self.pos <= self.lo:
+            self.dir = 1
+        
+        self.pos += self.dir * self.stepSize
+        return self.pos
+
+x, y = np.meshgrid(
+    np.linspace(-2, 2, Nx),
+    np.linspace(-2, 2, Ny))
+
+img = np.zeros( [Ny, Nx, 3] )
+
+Sa = Slider(-3, 3, 0.01, np.random.uniform(-1, 1))
+Sb = Slider(-3, 3, 0.01, np.random.uniform(-1, 1))
+Sc = Slider(0, 1, 0.005, np.random.uniform(-1, 1))
+
+Scolor = Slider(0, 1, 0.001/iterations, 0)
+
+
+step = 0
+while True:
+    a = Sa.step()
+    b = Sb.step()
+    c = Sc.step()
+
+    Sa.pos += b*0.001
+    Sb.pos += c*0.001
+    Sc.pos += a*0.001
+
+    curve = np.clip(c+np.sin(a*x*x-b*y*y)-np.sin(a*x+b*y)-np.cos(a*b*x*y), 0, 1)
+
+    cr, cg, cb = colorsys.hsv_to_rgb(Scolor.step(), 1, 1)
+
+    img[:,:,0] = curve*cr*255
+    img[:,:,1] = curve*cg*255
+    img[:,:,2] = curve*cb*255
+
+    step += 1
+    if step % iterations == 0:
+        out = img.reshape((Nx*Ny*3,)).astype(np.uint8)
+        os.write(1, out.tobytes())
+        time.sleep(0.01)
+
+
+