Adding "ripples" test script

test_scripts/ripples.py

@@ -0,0 +1,37 @@
+#!/usr/bin/python3
+
+import apple410
+import random
+import math
+
+# 2394 x 1700
+w=2394
+h=1700
+import sys
+
+ring1 = 1
+ring2 = 4
+
+if len(sys.argv) > 2:
+    ring1 = int(sys.argv[1])
+    ring2 = int(sys.argv[2])
+a = apple410.Apple410('/dev/ttyUSB0')
+for i in range(ring1, ring2+1):
+    a.send("PS{}".format(i))
+    xc = random.random() * w
+    yc = random.random() * h
+    pos="{:.2f},{:.2f}".format(xc,yc)
+    r=10+(random.random()*12)
+    maxr=0.0
+    for (tx,ty) in [(0,0),(w,0),(0,h),(w,h)]:
+        (dx,dy) = (tx-xc,ty-yc)
+        cr = math.sqrt(dx*dx + dy*dy)
+        if cr > maxr:
+            maxr = cr
+    iters = math.floor(cr/r)
+    for i in range(1,iters):
+        a.send("CA{:.1f},{}".format(i*r,pos))
+
+a.send("CH")
+a.send("RS")
+