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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() |