hilbert-bash.py

# michael.godfrey@digitalasset.com
# Apache 2.0 License

import time, math, random
from json import encoder
chars,x,y,_x,_y,idx,_i,theta,W,H = 'ABCDEF', 0,0,0,0,0,0,0,63,63
loop, LINE_UP, LINE_CLEAR = range(1, len(chars) + 1),  '\033[1A', '\x1b[2K'
grid = [[(0,-1) for y in range(H)] for x in range(W)]
def rotate(x,y,theta):
    _cos, _sin, rx, ry = math.cos(math.radians(theta)),  math.sin(math.radians(theta)), 0.5*W - x - 0.5, 0.5*W - y - 0.5
    return max(0,min(W - 1, math.floor((_cos * rx - _sin * ry) + 0.5*W))), max(0,min(W - 1, math.floor((_sin * rx + _cos * ry) + 0.5*W)))
def grid_fn(x,y,i, theta, idx):  
    x,y = rotate(x,y,theta)
    if grid[x][y][1] >= i: return f' {[" ", "k", "G"][math.floor(i/idx)%3]}'
    if grid[x][y][0] & (grid[x][y][1] - i >=-128): return f' {["*", "^", "$"][math.floor(i/idx)%3]}'
    if grid[x][y][0] & (grid[x][y][1] - i >=-96):  return ' x'
    if grid[x][y][0] & (grid[x][y][1] - i >=-64):  return ' O'
    if grid[x][y][0] & (grid[x][y][1] - i >=-32):  return ' 8'
    if grid[x][y][0] & (grid[x][y][1] - i >=-16):  return ' @'
    if grid[x][y][0]: return f' {"#" if random.random() > 0.5 else " "}'
    return ' .'
def idx_count():
    global idx
    idx=idx+1
    return idx
def rt(): 
    global _x, _y
    _x, _y = _x+1, _y
    grid[_x][_y] = (1,idx_count())
def lt():
    global _x,_y
    _x, _y = _x-1, _y
    grid[_x][_y] = (1,idx_count())
def up():
    global _x,_y
    _x,_y = _x, _y + 1
    grid[_x][_y] = (1,idx_count())
def dn():
    global _x,_y
    _x, _y = _x, _y-1
    grid[_x][_y] = (1,idx_count())
def up2(): up();up()
def dn2(): dn();dn()
def rt2(): rt();rt()
def lt2(): lt();lt()
if __name__=="__main__":
    ex = lambda ft:[fn() for fn in ft]
    UP = lambda :ex([rt, rt, up, up, lt, lt, up, up, up, up, rt, rt, dn, dn, rt, rt, up, up, rt, rt, dn, dn, dn, dn, lt, lt, dn, dn, rt, rt])
    RT = lambda :ex([up, up, rt, rt, dn, dn, rt, rt, rt, rt, up, up, lt, lt, up, up, rt, rt, up, up, lt, lt, lt, lt, dn, dn, lt, lt, up, up])
    DN = lambda :ex([lt, lt, dn, dn, rt, rt, dn, dn, dn, dn, lt, lt, up, up, lt, lt, dn, dn, lt, lt, up, up, up, up, rt, rt, up, up, lt, lt])
    LT = lambda :ex([dn, dn, lt, lt, up, up, lt, lt, lt, lt, dn, dn, rt, rt, dn, dn, lt, lt, dn, dn, rt, rt, rt, rt, up, up, rt, rt, dn, dn])
    Right = lambda:ex([UP, rt2, RT, up2, RT, lt2, DN])
    Left  = lambda:ex([DN, lt2, LT, dn2, LT, rt2, UP])
    Up    = lambda:ex([RT, up2, UP, rt2, UP, dn2, LT])
    Down  = lambda:ex([LT, dn2, DN, lt2, DN, up2, RT])
    ex([Right, up2, Up,    rt2, Up,    dn2, Left ]); rt2()
    ex([Up,    rt2, Right, up2, Right, lt2, Down ]); up2()
    ex([Up,    rt2, Right, up2, Right, lt2, Down ]); lt2()
    ex([Left,  dn2, Down,  lt2, Down,  up2, Right])
    with open("grid_export.json","w+") as f: f.write(encoder.JSONEncoder().encode(grid))
    while True:
        _i= _i+15
        mode = math.floor(_i/idx)%3
        i = (idx if mode==0 else idx - _i if mode==1 else _i) % idx
        theta = theta if mode!=0 else theta + (90/idx) * 30
        print(''.join(['|'+''.join([ f"{grid_fn(x,H-y-1,i,theta, idx)}" for x in range(W)]) + "|\n" for y in range(H)])); time.sleep(0.0001)