| """Visualize DesignSpaceDocument and resulting VariationModel.""" |
| |
| from __future__ import print_function, division, absolute_import |
| from fontTools.misc.py23 import * |
| from fontTools.varLib.models import VariationModel, supportScalar |
| from fontTools.designspaceLib import DesignSpaceDocument |
| from mpl_toolkits.mplot3d import axes3d |
| from matplotlib import pyplot |
| from itertools import cycle |
| import math |
| import logging |
| import sys |
| |
| log = logging.getLogger(__name__) |
| |
| |
| def stops(support, count=10): |
| a,b,c = support |
| |
| return [a + (b - a) * i / count for i in range(count)] + \ |
| [b + (c - b) * i / count for i in range(count)] + \ |
| [c] |
| |
| def plotLocations(locations, axes, axis3D, **kwargs): |
| for loc,color in zip(locations, cycle(pyplot.cm.Set1.colors)): |
| axis3D.plot([loc.get(axes[0], 0)], |
| [loc.get(axes[1], 0)], |
| [1.], |
| 'o', |
| color=color, |
| **kwargs) |
| |
| def plotLocationsSurfaces(locations, fig, names=None, **kwargs): |
| |
| assert len(locations[0].keys()) == 2 |
| |
| if names is None: |
| names = [''] |
| |
| n = len(locations) |
| cols = math.ceil(n**.5) |
| rows = math.ceil(n / cols) |
| |
| model = VariationModel(locations) |
| names = [names[model.reverseMapping[i]] for i in range(len(names))] |
| |
| ax1, ax2 = sorted(locations[0].keys()) |
| for i, (support,color, name) in enumerate(zip(model.supports, cycle(pyplot.cm.Set1.colors), cycle(names))): |
| |
| axis3D = fig.add_subplot(rows, cols, i + 1, projection='3d') |
| axis3D.set_title(name) |
| axis3D.set_xlabel(ax1) |
| axis3D.set_ylabel(ax2) |
| pyplot.xlim(-1.,+1.) |
| pyplot.ylim(-1.,+1.) |
| |
| Xs = support.get(ax1, (-1.,0.,+1.)) |
| Ys = support.get(ax2, (-1.,0.,+1.)) |
| for x in stops(Xs): |
| X, Y, Z = [], [], [] |
| for y in Ys: |
| z = supportScalar({ax1:x, ax2:y}, support) |
| X.append(x) |
| Y.append(y) |
| Z.append(z) |
| axis3D.plot(X, Y, Z, color=color, **kwargs) |
| for y in stops(Ys): |
| X, Y, Z = [], [], [] |
| for x in Xs: |
| z = supportScalar({ax1:x, ax2:y}, support) |
| X.append(x) |
| Y.append(y) |
| Z.append(z) |
| axis3D.plot(X, Y, Z, color=color, **kwargs) |
| |
| plotLocations(model.locations, [ax1, ax2], axis3D) |
| |
| |
| def plotDocument(doc, fig, **kwargs): |
| doc.normalize() |
| locations = [s.location for s in doc.sources] |
| names = [s.name for s in doc.sources] |
| plotLocationsSurfaces(locations, fig, names, **kwargs) |
| |
| |
| def main(args=None): |
| from fontTools import configLogger |
| |
| if args is None: |
| args = sys.argv[1:] |
| |
| # configure the library logger (for >= WARNING) |
| configLogger() |
| # comment this out to enable debug messages from logger |
| # log.setLevel(logging.DEBUG) |
| |
| if len(args) < 1: |
| print("usage: fonttools varLib.plot source.designspace", file=sys.stderr) |
| print(" or") |
| print("usage: fonttools varLib.plot location1 location2 ...", file=sys.stderr) |
| sys.exit(1) |
| |
| fig = pyplot.figure() |
| |
| if len(args) == 1 and args[0].endswith('.designspace'): |
| doc = DesignSpaceDocument() |
| doc.read(args[0]) |
| plotDocument(doc, fig) |
| else: |
| axes = [chr(c) for c in range(ord('A'), ord('Z')+1)] |
| locs = [dict(zip(axes, (float(v) for v in s.split(',')))) for s in args] |
| plotLocationsSurfaces(locs, fig) |
| |
| pyplot.show() |
| |
| if __name__ == '__main__': |
| import sys |
| sys.exit(main()) |