def draw_glyph(self, svg_paths_dir, margins, angle):
"""Define SVG elements to draw glyph based on this dot's value, position and size.
Parameters
----------
svg_paths_dir : str
directory containing glyphs paths as SVG
margins : [float, float, float, float]
top, right, bottom, left
angle : float
degrees
Returns
-------
string
"""
# read glyph path svg file as multiline
glyph_file = os.path.join(svg_paths_dir,
"{:02d}.svg".format(self.value))
doc = minidom.parse(glyph_file)
width = float(doc.getElementsByTagName("svg")[0].getAttribute("width"))
height = float(
doc.getElementsByTagName("svg")[0].getAttribute("height"))
lines = [[(float(point.split(",")[0]), float(point.split(",")[1]))
for point in path.getAttribute("points").split(" ")]
for path in doc.getElementsByTagName("polyline")]
doc.unlink()
multiline = MultiLineString(lines)
# compute cell bounds
target_xmin = self.ulx + margins[3]
target_xmax = self.ulx + self.size[0] - margins[1]
target_ymin = self.uly + margins[0]
target_ymax = self.uly + self.size[1] - margins[2]
# compute glyph bounds
xmin, ymin, xmax, ymax = multiline.bounds
target_xmin += xmin * (self.size[0] - margins[1] - margins[3]) / width
target_xmax -= (width - xmax) * (self.size[0] - margins[1] -
margins[3]) / width
target_ymin += ymin * (self.size[1] - margins[0] - margins[2]) / height
target_ymax -= (height - ymax) * (self.size[1] - margins[0] -
margins[2]) / height
# transform multiline based on cell position and size and angle
multiline = transform_multiline(multiline, target_xmin, target_xmax,
target_ymin, target_ymax, angle)
return multiline.svg()
