4cade/res/notes/transitions/slowripple.py

#!/usr/bin/env python3

from math import sqrt, sin, cos, pi

radius_x = 280/2
radius_y = 192/2

def f(t):
    return (sqrt(t)*cos(2*pi*sqrt(t)), 0.87*sqrt(t)*sin(2*pi*sqrt(t)))

coords = []
for i in range(1000000):
    any = False
    a, b = f(float(i)/10.0)
    x = round(radius_x+a)
    y = round(radius_y+b)
    if y % 2 != 0:
        continue
    if x < 0 or x >= radius_x or y < 0 or y >= radius_y:
        continue
    coords.append((x,y))

d = {}
unique_coords = []
for c in coords:
    if not d.get(c):
        unique_coords.append(c)
        d[c] = 1

unique_vals = []
for x, y in unique_coords:
    aval = "$" + hex(y)[2:].rjust(2, "0").upper()
    bval = "%" + \
        bin(x%7)[2:].rjust(3, "0") + \
        bin(x//7)[2:].rjust(5, "0")
    unique_vals.append((aval, bval))

with open("../../../src/fx/fx.hgr.iris.data.a", "w") as f:
    for aval, bval in unique_vals:
        f.write("         !byte %s,%s\n" % (aval, bval))

unique_vals.reverse()
with open("../../../src/fx/fx.hgr.iris.in.data.a", "w") as f:
    for aval, bval in unique_vals:
        f.write("         !byte %s,%s\n" % (aval, bval))

unique_vals.reverse()
ripple_vals = []
for i, j, k, l in zip(range(1680), range(1680,3360), range(3360,5040), range(5040,6720)):
    ripple_vals.append(unique_vals[i])
    ripple_vals.append(unique_vals[j])
    ripple_vals.append(unique_vals[k])
    ripple_vals.append(unique_vals[l])
with open("../../../src/fx/fx.hgr.ripple.data.a", "w") as f:
    for aval, bval in ripple_vals:
        f.write("         !byte %s,%s\n" % (aval, bval))