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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() |