def __init__(self, xdata, ydata, options):
"""
Initializes base class Polygon.
EXAMPLES::
sage: P = polygon([(0,0), (1,1), (-1,3)], thickness=2)
sage: P[0].xdata
[0.0, 1.0, -1.0]
sage: P[0].options()['thickness']
2
"""
self.xdata = xdata
self.ydata = ydata
GraphicPrimitive_xydata.__init__(self, options)
def __init__(self, xdata, ydata, options):
"""
Initializes base class Point.
EXAMPLES::
sage: P = point((3,4))
sage: P[0].xdata
[3.0]
sage: P[0].options()['alpha']
1
"""
self.xdata = xdata
self.ydata = ydata
GraphicPrimitive_xydata.__init__(self, options)
def __init__(self, xdata, ydata, options):
"""
Initializes base class Polygon.
EXAMPLES::
sage: P = polygon([(0,0), (1,1), (-1,3)], thickness=2)
sage: P[0].xdata
[0.0, 1.0, -1.0]
sage: P[0].options()['thickness']
2
"""
self.xdata = xdata
self.ydata = ydata
GraphicPrimitive_xydata.__init__(self, options)
def __init__(self, xdata, ydata, options):
"""
Initializes base class Point.
EXAMPLES::
sage: P = point((3,4))
sage: P[0].xdata
[3.0]
sage: P[0].options()['alpha']
1
"""
self.xdata = xdata
self.ydata = ydata
GraphicPrimitive_xydata.__init__(self, options)
def __init__(self, path, options):
"""
Returns a graphics primitive of a path of Bezier curves.
EXAMPLES::
sage: from sage.plot.bezier_path import BezierPath
sage: BezierPath([[(0,0),(.5,.5),(1,0)],[(.5,1),(0,0)]], {'linestyle':'dashed'})
Bezier path from (0.0, 0.0) to (0.0, 0.0)
sage: BezierPath([[(0,0), (1,2), (3,6), (2,-1), (3,3)]], {})
Traceback (most recent call last):
...
ValueError: invalid input for BezierPath
TESTS:
Check :trac:`31646`::
sage: from sage.plot.bezier_path import BezierPath
sage: p2d = [[(3,0),(4,1),(2,1),(3,0)], [(2,2),(3,1),(2,1)]]
sage: P = BezierPath(p2d, {})
sage: P.path
[array([[3., 0.], [4., 1.], [2., 1.], [3., 0.]]),
array([[2., 2.], [3., 1.], [2., 1.]])]
"""
import numpy as np
self.path = [np.array(l, float) for l in path]
# In oder to feed later to matplotlib.path.Path we convert in the following form
# - vertices: an Nx2 float array of vertices
# - codes: an N-length uint8 array of vertex types, or None
# where each code could be MOVETO (=1), LINETO (=2), CURVE3 (=3), CURVE4 (=4)
self.vertices = np.concatenate(self.path)
N, _ = self.vertices.shape
codes = np.zeros((N,), np.uint8)
k = 0
for i, curve in enumerate(self.path):
code = len(curve) + (i > 0)
if code < 2 or code > 4:
raise ValueError('invalid input for BezierPath')
codes[k:k+len(curve)] = code
k += len(curve)
codes[0] = 1 # MOVETO
self.codes = codes
GraphicPrimitive_xydata.__init__(self, options)
def __init__(self, xdata, ydata, options):
"""
Initialize a line graphics primitive.
EXAMPLES::
sage: from sage.plot.line import Line
sage: Line([-1,2], [17,4], {'thickness':2})
Line defined by 2 points
"""
valid_options = self._allowed_options().keys()
for opt in options.iterkeys():
if opt not in valid_options:
raise RuntimeError("Error in line(): option '%s' not valid."%opt)
self.xdata = xdata
self.ydata = ydata
GraphicPrimitive_xydata.__init__(self, options)
def __init__(self, xdata, ydata, options):
"""
Initialize a line graphics primitive.
EXAMPLES::
sage: from sage.plot.line import Line
sage: Line([-1,2], [17,4], {'thickness':2})
Line defined by 2 points
"""
valid_options = self._allowed_options()
for opt in options:
if opt not in valid_options:
raise RuntimeError("Error in line(): option '%s' not valid." % opt)
self.xdata = xdata
self.ydata = ydata
GraphicPrimitive_xydata.__init__(self, options)
def __init__(self, path, options):
"""
Returns a graphics primitive of a path of Bezier curves.
EXAMPLES::
sage: from sage.plot.bezier_path import BezierPath
sage: BezierPath([[(0,0),(.5,.5),(1,0)],[(.5,1),(0,0)]],{'linestyle':'dashed'})
Bezier path from (0, 0) to (0, 0)
"""
import numpy as np
self.path = path
codes = [1] + (len(self.path[0])-1)*[len(self.path[0])]
vertices = self.path[0]
for curve in self.path[1:]:
vertices += curve
codes += (len(curve))*[len(curve)+1]
self.codes = codes
self.vertices = np.array(vertices, np.float)
GraphicPrimitive_xydata.__init__(self, options)
