def _render_marker(self, a, b, marker, reverse=False):
if marker.orient == 'auto':
angle = (a - b).angle()
else:
angle = marker.orient
if reverse:
angle += math.pi
sx = (marker.marker_width / marker.vb_w) * self.style.stroke_width
sy = (marker.marker_height / marker.vb_h) * self.style.stroke_width
rx = marker.ref_x
ry = marker.ref_y
with Matrix.transform(a.x, a.y, theta=angle):
with Matrix.scale(sx, sy):
with Matrix.translation(-rx, -ry):
marker.render()
def __init__(self, svg, element, parent):
SVGRenderableElement.__init__(self, svg, element, parent)
self.svg = svg
self.target = element.get(XLINK_NS + "href", None)
self.x = parse_float(element.get('x', '0'))
self.y = parse_float(element.get('y', '0'))
self.transform = self.transform * Matrix.translation(self.x, self.y)
#clip off "#"
if self.target:
self.target = self.target[1:]
def __init__(self, svg, element, parent):
#: The id of the element
self.id = element.get('id', '')
SVGContainer.__init__(self, parent)
self.svg = svg
#: Is this element a pattern?
self.is_pattern = element.tag.endswith('pattern')
#: Is this element a definition?
self.is_def = False
if parent:
self.is_def = parent.is_def
#: The element style (possibly with inherited traits from parent style)
self.style = svg_style.SVGStyle(
parent.style if isinstance(parent, SVGRenderableElement) else None)
self.style.from_element(element)
#: Optional element title
self.title = element.findtext('{%s}title' % (XMLNS,))
#: Optional element description. Useful for embedding metadata.
self.description = element.findtext('{%s}desc' % (XMLNS,))
#construct a matrix for each transform
t_acc = Matrix.identity()
transform_str = element.get('transform', None)
if transform_str:
transforms = get_fns(transform_str)
for tstring in transforms:
t_acc = t_acc * Matrix(tstring)
#: Element transforms
self.transform = t_acc
#: Children elements
self.children = []
#: XML tag this was originally.
self.tag_type = element.tag
