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| 1 | #! /usr/bin/env python | ||
| 2 | |||
| 3 | def get_keyboard_edges(firstnote = 21, lastnote = 108, y0 = 0, y1 = 1): | ||
| 4 | octaves = 10 | ||
| 5 | |||
| 6 | # build template of white notes | ||
| 7 | scalew = 12/7. | ||
| 8 | xw_temp = [i*scalew for i in range(0,7)] | ||
| 9 | # build template of black notes | ||
| 10 | scaleb = 6/7. | ||
| 11 | xb_temp = [i*scaleb for i in [1,3,7,9,11]] | ||
| 12 | |||
| 13 | xb,xw = [],[] | ||
| 14 | for octave in range(octaves-1): | ||
| 15 | for i in xb_temp: | ||
| 16 | curnote = i+12*octave | ||
| 17 | if curnote > firstnote-1 and curnote < lastnote+1: | ||
| 18 | xb = xb + [curnote] | ||
| 19 | for octave in range(octaves-1): | ||
| 20 | for i in xw_temp: | ||
| 21 | curnote = i+12*octave | ||
| 22 | if curnote > firstnote-1 and curnote < lastnote+1: | ||
| 23 | xw = xw + [curnote] | ||
| 24 | |||
| 25 | xwdelta = [1/2. * scalew for i in range(len(xw))] | ||
| 26 | yw = [y0+(y1-y0)*1/2. for i in range(len(xw))] | ||
| 27 | ywdelta = [(y1-y0)*1/2. for i in range(len(xw))] | ||
| 28 | |||
| 29 | xbdelta = [2/3. * scaleb for i in range(len(xb))] | ||
| 30 | yb = [y0+(y1-y0)*2/3. for i in range(len(xb))] | ||
| 31 | ybdelta = [(y1-y0)*1/3. for i in range(len(xb))] | ||
| 32 | |||
| 33 | whites,white_height = xw,yw | ||
| 34 | blacks,black_height = xb,yb | ||
| 35 | |||
| 36 | return blacks,whites, 2/3. *scaleb, 1/2. * scalew | ||
| 37 | |||
| 38 | def create_keyboard_patches(firstnote, lastnote, ax = None): | ||
| 39 | import numpy as np | ||
| 40 | import matplotlib.pyplot as plt | ||
| 41 | from matplotlib.path import Path | ||
| 42 | import matplotlib.patches as mpatches | ||
| 43 | |||
| 44 | blacks, whites, b_width, w_width = get_keyboard_edges(firstnote, lastnote) | ||
| 45 | |||
| 46 | if not ax: | ||
| 47 | fig = plt.figure() | ||
| 48 | ax = fig.add_subplot(111) | ||
| 49 | |||
| 50 | verts, codes = [], [] | ||
| 51 | for white in whites: | ||
| 52 | verts += [ (white - w_width, 0), (white - w_width, 1), (white + w_width, 1), (white + w_width, 0) ] | ||
| 53 | verts += [ (white - w_width, 0) ] | ||
| 54 | codes += [Path.MOVETO] + [Path.LINETO] * 4 | ||
| 55 | path = Path(verts, codes) | ||
| 56 | patch = mpatches.PathPatch(path, facecolor= 'white', edgecolor='black', lw=1) | ||
| 57 | ax.add_patch(patch) | ||
| 58 | |||
| 59 | verts, codes = [], [] | ||
| 60 | for black in blacks: | ||
| 61 | verts += [ (black - b_width, 0.33), (black - b_width, 1), (black + b_width, 1), (black + b_width, 0.33) ] | ||
| 62 | verts += [ (black - b_width, 0.33) ] | ||
| 63 | codes += [Path.MOVETO] + [Path.LINETO] * 4 | ||
| 64 | path = Path(verts, codes) | ||
| 65 | patch = mpatches.PathPatch(path, facecolor= 'black', edgecolor='black', lw=1) | ||
| 66 | ax.add_patch(patch) | ||
| 67 | |||
| 68 | ax.axis(xmin = firstnote, xmax = lastnote) | ||
| 69 | |||
| 70 | if __name__ == '__main__': | ||
| 71 | |||
| 72 | if 0: | ||
| 73 | from aubio.gnuplot import gnuplot_create | ||
| 74 | import Gnuplot | ||
| 75 | whites = Gnuplot.Data(blacks, yw,xwdelta,ywdelta,with_ = 'boxxyerrorbars') | ||
| 76 | blacks = Gnuplot.Data(whites, yb,xbdelta,ybdelta,with_ = 'boxxyerrorbars fill solid') | ||
| 77 | g = gnuplot_create('','') | ||
| 78 | #g('set style fill solid .5') | ||
| 79 | #g('set xrange [60-.5:72+.5]') | ||
| 80 | #g('set yrange [-0.1:1.1]') | ||
| 81 | g.plot(whites,blacks) | ||
| 82 | else: | ||
| 83 | import matplotlib.pyplot as plt | ||
| 84 | create_keyboard_patches(firstnote = 61, lastnote = 108) | ||
| 85 | plt.show() | ||