svgfig::Ellipse Class Reference

Inheritance diagram for svgfig::Ellipse:

List of all members.

Public Member Functions
def	__init__
def	__repr__
def	Path
def	SVG
Public Attributes
	attr
	b
	f
	high
	loop
	low
Static Public Attributes
dictionary	defaults = {}

---

Detailed Description

Draws an ellipse from a semimajor vector (ax,ay) and a semiminor
length (b).

Ellipse(x, y, ax, ay, b, attribute=value)

x, y                    required        the center of the ellipse/circle
ax, ay                  required        a vector indicating the length
                                        and direction of the semimajor axis
b                       required        the length of the semiminor axis.
                                        If equal to sqrt(ax2 + ay2), the
                                        ellipse is a circle
attribute=value pairs   keyword list    SVG attributes

(If sqrt(ax**2 + ay**2) is less than b, then (ax,ay) is actually the
semiminor axis.)

Definition at line 2235 of file svgfig.py.

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Constructor & Destructor Documentation

def svgfig::Ellipse::__init__	(		self,
			x,
			y,
			ax,
			ay,
			b,
			attr
	)

Definition at line 2257 of file svgfig.py.

                                             :
    self.x, self.y, self.ax, self.ay, self.b = x, y, ax, ay, b

    self.attr = dict(self.defaults)
    self.attr.update(attr)

---

Member Function Documentation

def svgfig::Ellipse::__repr__

(

self

)

Reimplemented from svgfig::Curve.

Definition at line 2254 of file svgfig.py.

                    :
    return "<Ellipse (%g, %g) a=(%g, %g), b=%g %s>" % (self.x, self.y, self.ax, self.ay, self.b, self.attr)

def svgfig::Ellipse::Path	(		self,
			trans = None,
			local = False
	)

Apply the transformation "trans" and return a Path object in
global coordinates.  If local=True, return a Path in local coordinates
(which must be transformed again).

Reimplemented from svgfig::Curve.

Definition at line 2267 of file svgfig.py.

                                         :
    """Apply the transformation "trans" and return a Path object in
    global coordinates.  If local=True, return a Path in local coordinates
    (which must be transformed again)."""
    angle = math.atan2(self.ay, self.ax) + math.pi/2.
    bx = self.b * math.cos(angle)
    by = self.b * math.sin(angle)

    self.f = lambda t: (self.x + self.ax*math.cos(t) + bx*math.sin(t), self.y + self.ay*math.cos(t) + by*math.sin(t))
    self.low = -math.pi
    self.high = math.pi
    self.loop = True
    return Curve.Path(self, trans, local)

def svgfig::Ellipse::SVG	(		self,
			trans = None
	)

Apply the transformation "trans" and return an SVG object.

Reimplemented from svgfig::Curve.

Definition at line 2263 of file svgfig.py.

                           :
    """Apply the transformation "trans" and return an SVG object."""
    return self.Path(trans).SVG()

---

Member Data Documentation

svgfig::Ellipse::attr

Reimplemented from svgfig::Curve.

Definition at line 2257 of file svgfig.py.

svgfig::Ellipse::b

Definition at line 2257 of file svgfig.py.

dictionary svgfig::Ellipse::defaults = {} [static]

Reimplemented from svgfig::Curve.

Definition at line 2252 of file svgfig.py.

svgfig::Ellipse::f

Reimplemented from svgfig::Curve.

Definition at line 2269 of file svgfig.py.

svgfig::Ellipse::high

Reimplemented from svgfig::Curve.

Definition at line 2269 of file svgfig.py.

svgfig::Ellipse::loop

Reimplemented from svgfig::Curve.

Definition at line 2269 of file svgfig.py.

svgfig::Ellipse::low

Reimplemented from svgfig::Curve.

Definition at line 2269 of file svgfig.py.