axi/examples/nes.py

from __future__ import division

import axi
import numpy as np
import os
import sys

NUMBER = '19'
TITLE = 'Fifteen Seconds of The Legend of Zelda'
LABEL = '#%s' % NUMBER

COLUMNS = 8
SECONDS = 15
FRAME_OFFSET = 600
MIN_CHANGES = 2
UNIQUE = False
SIMPLIFY = 5

def simplify_sparkline(values, n):
    if not n:
        return values
    result = []
    previous = None
    for x, y in enumerate(values):
        if result:
            window = result[-n:]
            lo = min(window)
            hi = max(window)
            if y >= lo and y <= hi:
                result.append(result[-1])
                previous = y
                continue
        if previous is not None:
            result[-1] = previous
        result.append(y)
        previous = y
    return result

def stack_drawings(ds, spacing=0):
    result = axi.Drawing()
    y = 0
    for d in ds:
        d = d.origin().translate(-d.width / 2, y)
        result.add(d)
        y += d.height + spacing
    return result

def title():
    d = axi.Drawing(axi.text(TITLE, axi.FUTURAM))
    d = d.scale_to_fit_height(0.25)
    d = d.move(6, 8.5, 0.5, 1)
    d = d.join_paths(0.01)
    return d

def label():
    d = axi.Drawing(axi.text(LABEL, axi.FUTURAL))
    d = d.scale_to_fit_height(0.125)
    d = d.rotate(-90)
    d = d.move(12, 8.5, 1, 1)
    d = d.join_paths(0.01)
    return d

def main():
    # read file
    with open(sys.argv[1], 'r') as fp:
        data = fp.read()

    # strip and split lines
    lines = data.split('\n')
    lines = [x.strip() for x in lines]
    lines = [x.strip(',') for x in lines]
    lines = filter(None, lines)

    # read values and transpose
    data = [map(int, line.split(',')) for line in lines]
    data = np.transpose(data)
    print '%d series in file' % len(data)

    # trim to SECONDS worth of data
    n = len(data[0])
    m = int(SECONDS * 60 / 2)
    mid = int(n // 2) + FRAME_OFFSET
    a = max(0, mid - m)
    b = min(n, mid + m)
    data = [x[a:b] for x in data]

    # remove addresses with too few values
    data = [x for x in data if len(set(x)) > MIN_CHANGES]
    print '%d series that changed' % len(data)

    # remove duplicate series
    if UNIQUE:
        new_data = []
        seen = set()
        for x in data:
            k = tuple(x)
            if k in seen:
                continue
            seen.add(k)
            new_data.append(x)
        data = new_data
        print '%d unique series' % len(data)

    # trim so all rows are full
    data = data[:int((len(data) // COLUMNS) * COLUMNS)]
    print '%d series after trimming' % len(data)

    print '%d data points each' % len(data[0])

    # create sparklines in a grid pattern
    paths = []
    for i, row in enumerate(data):
        row = simplify_sparkline(row, SIMPLIFY)
        r = i // COLUMNS
        c = i % COLUMNS
        lo = min(row)
        hi = max(row)
        if lo == hi:
            row = [0 for x in row]
        else:
            row = [(x - lo) / float(hi - lo) for x in row]
        path = []
        for j, value in enumerate(row):
            x = (j / len(row) + c * 1.1)
            y = 1-value + r * 1.5
            path.append((x, y))
        paths.append(path)
    d = axi.Drawing(paths)

    # add title and label and fit to page
    d = d.scale(8.5 / d.width, (12 - 0.5) / d.height)
    d = stack_drawings([d, title()], 0.25)
    d = d.rotate(-90)
    d = d.center(12, 8.5)
    d.add(label())

    print d.bounds

    # save outputs
    dirname = 'nes/%s' % NUMBER
    try:
        os.makedirs(dirname)
    except Exception:
        pass
    d.dump(os.path.join(dirname, 'out.axi'))
    rotated = d.rotate(90).center(8.5, 12)
    rotated.dump_svg(os.path.join(dirname, 'out.svg'))
    im = rotated.render(scale=109 * 1, line_width=0.3/25.4)
    im.write_to_png(os.path.join(dirname, 'out.png'))

if __name__ == '__main__':
    main()