Python Path.arc方法代码示例

# 需要导入模块: from matplotlib.path import Path [as 别名]
# 或者: from matplotlib.path.Path import arc [as 别名]
def _recompute_path(self):
        # Inner and outer rings are connected unless the annulus is complete
        if abs((self.theta2 - self.theta1) - 360) <= 1e-12:
            theta1, theta2 = 0, 360
            connector = Path.MOVETO
        else:
            theta1, theta2 = self.theta1, self.theta2
            connector = Path.LINETO

        # Form the outer ring
        arc = Path.arc(theta1, theta2)

        if self.width is not None:
            # Partial annulus needs to draw the outer ring
            # followed by a reversed and scaled inner ring
            v1 = arc.vertices
            v2 = arc.vertices[::-1] * float(self.r - self.width) / self.r
            v = np.vstack([v1, v2, v1[0, :], (0, 0)])
            c = np.hstack([arc.codes, arc.codes, connector, Path.CLOSEPOLY])
            c[len(arc.codes)] = connector
        else:
            # Wedge doesn't need an inner ring
            v = np.vstack([arc.vertices, [(0, 0), arc.vertices[0, :], (0, 0)]])
            c = np.hstack([arc.codes, [connector, connector, Path.CLOSEPOLY]])

        # Shift and scale the wedge to the final location.
        v *= self.r
        v += np.asarray(self.center)
        self._path = Path(v, c) 

# 需要导入模块: from matplotlib.path import Path [as 别名]
# 或者: from matplotlib.path.Path import arc [as 别名]
def __init__(self, xy, width, height, angle=0.0,
                 theta1=0.0, theta2=360.0, **kwargs):
        """
        The following args are supported:

        *xy*
          center of ellipse

        *width*
          length of horizontal axis

        *height*
          length of vertical axis

        *angle*
          rotation in degrees (anti-clockwise)

        *theta1*
          starting angle of the arc in degrees

        *theta2*
          ending angle of the arc in degrees

        If *theta1* and *theta2* are not provided, the arc will form a
        complete ellipse.

        Valid kwargs are:

        %(Patch)s
        """
        fill = kwargs.setdefault('fill', False)
        if fill:
            raise ValueError("Arc objects can not be filled")

        Ellipse.__init__(self, xy, width, height, angle, **kwargs)

        self.theta1 = theta1
        self.theta2 = theta2

        self._path = Path.arc(self.theta1, self.theta2) 

# 需要导入模块: from matplotlib.path import Path [as 别名]
# 或者: from matplotlib.path.Path import arc [as 别名]
def set_connectionstyle(self, connectionstyle, **kw):
        """
        Set the connection style.

        *connectionstyle* can be a string with connectionstyle name with
         optional comma-separated attributes. Alternatively, the attrs can be
         probided as keywords.

         set_connectionstyle("arc,angleA=0,armA=30,rad=10")
         set_connectionstyle("arc", angleA=0,armA=30,rad=10)

        Old attrs simply are forgotten.

        Without argument (or with connectionstyle=None), return
        available styles as a list of strings.
        """

        if connectionstyle is None:
            return ConnectionStyle.pprint_styles()

        if isinstance(connectionstyle, ConnectionStyle._Base):
            self._connector = connectionstyle
        elif callable(connectionstyle):
            # we may need check the calling convention of the given function
            self._connector = connectionstyle
        else:
            self._connector = ConnectionStyle(connectionstyle, **kw) 

# 需要导入模块: from matplotlib.path import Path [as 别名]
# 或者: from matplotlib.path.Path import arc [as 别名]
def set_connectionstyle(self, connectionstyle, **kw):
        """
        Set the connection style.

        *connectionstyle* can be a string with connectionstyle name with
         optional comma-separated attributes. Alternatively, the attrs can be
         probided as keywords.

         set_connectionstyle("arc,angleA=0,armA=30,rad=10")
         set_connectionstyle("arc", angleA=0,armA=30,rad=10)

        Old attrs simply are forgotten.

        Without argument (or with connectionstyle=None), return
        available styles as a list of strings.
        """

        if connectionstyle is None:
            return ConnectionStyle.pprint_styles()

        if isinstance(connectionstyle, ConnectionStyle._Base):
            self._connector = connectionstyle
        elif six.callable(connectionstyle):
            # we may need check the calling convention of the given function
            self._connector = connectionstyle
        else:
            self._connector = ConnectionStyle(connectionstyle, **kw) 

# 需要导入模块: from matplotlib.path import Path [as 别名]
# 或者: from matplotlib.path.Path import arc [as 别名]
def test_full_arc(offset):
    low = offset
    high = 360 + offset

    path = Path.arc(low, high)
    mins = np.min(path.vertices, axis=0)
    maxs = np.max(path.vertices, axis=0)
    np.testing.assert_allclose(mins, -1)
    assert np.allclose(maxs, 1) 

# 需要导入模块: from matplotlib.path import Path [as 别名]
# 或者: from matplotlib.path.Path import arc [as 别名]
def make_venn3_region_patch(region):
    '''
    Given a venn3 region (as returned from compute_venn3_regions) produces a Patch object,
    depicting the region as a curve.

    >>> centers, radii = solve_venn3_circles((1, 1, 1, 1, 1, 1, 1))
    >>> regions = compute_venn3_regions(centers, radii)
    >>> patches = [make_venn3_region_patch(r) for r in regions]
    '''
    if region is None or len(region[0]) == 0:
        return None
    if region[0] == "CIRCLE":
        return Circle(region[1][0], region[1][1])
    pts, arcs, label_pos = region
    path = [pts[0]]
    for i in range(len(pts)):
        j = (i + 1) % len(pts)
        (center, radius, direction) = arcs[i]
        fromangle = vector_angle_in_degrees(pts[i] - center)
        toangle = vector_angle_in_degrees(pts[j] - center)
        if direction:
            vertices = Path.arc(fromangle, toangle).vertices
        else:
            vertices = Path.arc(toangle, fromangle).vertices
            vertices = vertices[np.arange(len(vertices) - 1, -1, -1)]
        vertices = vertices * radius + center
        path = path + list(vertices[1:])
    codes = [1] + [4] * (len(path) - 1)
    return PathPatch(Path(path, codes)) 

# 需要导入模块: from matplotlib.path import Path [as 别名]
# 或者: from matplotlib.path.Path import arc [as 别名]
def _arc(self, quadrant=0, cw=True, radius=1, center=(0, 0)):
        """
        Return the codes and vertices for a rotated, scaled, and translated
        90 degree arc.

        Optional keyword arguments:

          ===============   ==========================================
          Keyword           Description
          ===============   ==========================================
          *quadrant*        uses 0-based indexing (0, 1, 2, or 3)
          *cw*              if True, clockwise
          *center*          (x, y) tuple of the arc's center
          ===============   ==========================================
        """
        # Note:  It would be possible to use matplotlib's transforms to rotate,
        # scale, and translate the arc, but since the angles are discrete,
        # it's just as easy and maybe more efficient to do it here.
        ARC_CODES = [Path.LINETO,
                     Path.CURVE4,
                     Path.CURVE4,
                     Path.CURVE4,
                     Path.CURVE4,
                     Path.CURVE4,
                     Path.CURVE4]
        # Vertices of a cubic Bezier curve approximating a 90 deg arc
        # These can be determined by Path.arc(0,90).
        ARC_VERTICES = np.array([[1.00000000e+00, 0.00000000e+00],
                                 [1.00000000e+00, 2.65114773e-01],
                                 [8.94571235e-01, 5.19642327e-01],
                                 [7.07106781e-01, 7.07106781e-01],
                                 [5.19642327e-01, 8.94571235e-01],
                                 [2.65114773e-01, 1.00000000e+00],
                                 # Insignificant
                                 #[6.12303177e-17, 1.00000000e+00]])
                                 [0.00000000e+00, 1.00000000e+00]])
        if quadrant == 0 or quadrant == 2:
            if cw:
                vertices = ARC_VERTICES
            else:
                vertices = ARC_VERTICES[:, ::-1]  # Swap x and y.
        elif quadrant == 1 or quadrant == 3:
            # Negate x.
            if cw:
                # Swap x and y.
                vertices = np.column_stack((-ARC_VERTICES[:, 1],
                                             ARC_VERTICES[:, 0]))
            else:
                vertices = np.column_stack((-ARC_VERTICES[:, 0],
                                             ARC_VERTICES[:, 1]))
        if quadrant > 1:
            radius = -radius  # Rotate 180 deg.
        return zip(ARC_CODES, radius * vertices +
                              np.tile(center, (ARC_VERTICES.shape[0], 1))) 

# 需要导入模块: from matplotlib.path import Path [as 别名]
# 或者: from matplotlib.path.Path import arc [as 别名]
def _add_input(self, path, angle, flow, length):
        """
        Add an input to a path and return its tip and label locations.
        """
        if angle is None:
            return [0, 0], [0, 0]
        else:
            x, y = path[-1][1]  # Use the last point as a reference.
            dipdepth = (flow / 2) * self.pitch
            if angle == RIGHT:
                x -= length
                dip = [x + dipdepth, y + flow / 2.0]
                path.extend([(Path.LINETO, [x, y]),
                             (Path.LINETO, dip),
                             (Path.LINETO, [x, y + flow]),
                             (Path.LINETO, [x + self.gap, y + flow])])
                label_location = [dip[0] - self.offset, dip[1]]
            else:  # Vertical
                x -= self.gap
                if angle == UP:
                    sign = 1
                else:
                    sign = -1

                dip = [x - flow / 2, y - sign * (length - dipdepth)]
                if angle == DOWN:
                    quadrant = 2
                else:
                    quadrant = 1

                # Inner arc isn't needed if inner radius is zero
                if self.radius:
                    path.extend(self._arc(quadrant=quadrant,
                                          cw=angle == UP,
                                          radius=self.radius,
                                          center=(x + self.radius,
                                                  y - sign * self.radius)))
                else:
                    path.append((Path.LINETO, [x, y]))
                path.extend([(Path.LINETO, [x, y - sign * length]),
                             (Path.LINETO, dip),
                             (Path.LINETO, [x - flow, y - sign * length])])
                path.extend(self._arc(quadrant=quadrant,
                                      cw=angle == DOWN,
                                      radius=flow + self.radius,
                                      center=(x + self.radius,
                                              y - sign * self.radius)))
                path.append((Path.LINETO, [x - flow, y + sign * flow]))
                label_location = [dip[0], dip[1] - sign * self.offset]

            return dip, label_location 

# 需要导入模块: from matplotlib.path import Path [as 别名]
# 或者: from matplotlib.path.Path import arc [as 别名]
def _arc(self, quadrant=0, cw=True, radius=1, center=(0, 0)):
        """
        Return the codes and vertices for a rotated, scaled, and translated
        90 degree arc.

        Optional keyword arguments:

          ===============   ==========================================
          Keyword           Description
          ===============   ==========================================
          *quadrant*        uses 0-based indexing (0, 1, 2, or 3)
          *cw*              if True, clockwise
          *center*          (x, y) tuple of the arc's center
          ===============   ==========================================
        """
        # Note:  It would be possible to use matplotlib's transforms to rotate,
        # scale, and translate the arc, but since the angles are discrete,
        # it's just as easy and maybe more efficient to do it here.
        ARC_CODES = [Path.LINETO,
                     Path.CURVE4,
                     Path.CURVE4,
                     Path.CURVE4,
                     Path.CURVE4,
                     Path.CURVE4,
                     Path.CURVE4]
        # Vertices of a cubic Bezier curve approximating a 90 deg arc
        # These can be determined by Path.arc(0,90).
        ARC_VERTICES = np.array([[1.00000000e+00, 0.00000000e+00],
                                 [1.00000000e+00, 2.65114773e-01],
                                 [8.94571235e-01, 5.19642327e-01],
                                 [7.07106781e-01, 7.07106781e-01],
                                 [5.19642327e-01, 8.94571235e-01],
                                 [2.65114773e-01, 1.00000000e+00],
                                 # Insignificant
                                 #[6.12303177e-17, 1.00000000e+00]])
                                 [0.00000000e+00, 1.00000000e+00]])
        if quadrant == 0 or quadrant == 2:
            if cw:
                vertices = ARC_VERTICES
            else:
                vertices = ARC_VERTICES[:, ::-1]  # Swap x and y.
        elif quadrant == 1 or quadrant == 3:
            # Negate x.
            if cw:
                # Swap x and y.
                vertices = np.column_stack((-ARC_VERTICES[:, 1],
                                             ARC_VERTICES[:, 0]))
            else:
                vertices = np.column_stack((-ARC_VERTICES[:, 0],
                                             ARC_VERTICES[:, 1]))
        if quadrant > 1:
            radius = -radius  # Rotate 180 deg.
        return list(zip(ARC_CODES, radius * vertices +
                        np.tile(center, (ARC_VERTICES.shape[0], 1)))) 

# 需要导入模块: from matplotlib.path import Path [as 别名]
# 或者: from matplotlib.path.Path import arc [as 别名]
def _arc(self, quadrant=0, cw=True, radius=1, center=(0, 0)):
        """
        Return the codes and vertices for a rotated, scaled, and translated
        90 degree arc.

        Optional keyword arguments:

          ===============   ==========================================
          Keyword           Description
          ===============   ==========================================
          *quadrant*        uses 0-based indexing (0, 1, 2, or 3)
          *cw*              if True, clockwise
          *center*          (x, y) tuple of the arc's center
          ===============   ==========================================
        """
        # Note:  It would be possible to use matplotlib's transforms to rotate,
        # scale, and translate the arc, but since the angles are discrete,
        # it's just as easy and maybe more efficient to do it here.
        ARC_CODES = [Path.LINETO,
                     Path.CURVE4,
                     Path.CURVE4,
                     Path.CURVE4,
                     Path.CURVE4,
                     Path.CURVE4,
                     Path.CURVE4]
        # Vertices of a cubic Bezier curve approximating a 90 deg arc
        # These can be determined by Path.arc(0,90).
        ARC_VERTICES = np.array([[1.00000000e+00, 0.00000000e+00],
                                 [1.00000000e+00, 2.65114773e-01],
                                 [8.94571235e-01, 5.19642327e-01],
                                 [7.07106781e-01, 7.07106781e-01],
                                 [5.19642327e-01, 8.94571235e-01],
                                 [2.65114773e-01, 1.00000000e+00],
                                 # Insignificant
                                 # [6.12303177e-17, 1.00000000e+00]])
                                 [0.00000000e+00, 1.00000000e+00]])
        if quadrant == 0 or quadrant == 2:
            if cw:
                vertices = ARC_VERTICES
            else:
                vertices = ARC_VERTICES[:, ::-1]  # Swap x and y.
        elif quadrant == 1 or quadrant == 3:
            # Negate x.
            if cw:
                # Swap x and y.
                vertices = np.column_stack((-ARC_VERTICES[:, 1],
                                             ARC_VERTICES[:, 0]))
            else:
                vertices = np.column_stack((-ARC_VERTICES[:, 0],
                                             ARC_VERTICES[:, 1]))
        if quadrant > 1:
            radius = -radius  # Rotate 180 deg.
        return list(zip(ARC_CODES, radius * vertices +
                        np.tile(center, (ARC_VERTICES.shape[0], 1)))) 

# 需要导入模块: from matplotlib.path import Path [as 别名]
# 或者: from matplotlib.path.Path import arc [as 别名]
def _add_output(self, path, angle, flow, length):
        """
        Append an output to a path and return its tip and label locations.

        .. note:: *flow* is negative for an output.
        """
        if angle is None:
            return [0, 0], [0, 0]
        else:
            x, y = path[-1][1]  # Use the last point as a reference.
            tipheight = (self.shoulder - flow / 2) * self.pitch
            if angle == RIGHT:
                x += length
                tip = [x + tipheight, y + flow / 2.0]
                path.extend([(Path.LINETO, [x, y]),
                             (Path.LINETO, [x, y + self.shoulder]),
                             (Path.LINETO, tip),
                             (Path.LINETO, [x, y - self.shoulder + flow]),
                             (Path.LINETO, [x, y + flow]),
                             (Path.LINETO, [x - self.gap, y + flow])])
                label_location = [tip[0] + self.offset, tip[1]]
            else:  # Vertical
                x += self.gap
                if angle == UP:
                    sign = 1
                else:
                    sign = -1

                tip = [x - flow / 2.0, y + sign * (length + tipheight)]
                if angle == UP:
                    quadrant = 3
                else:
                    quadrant = 0
                # Inner arc isn't needed if inner radius is zero
                if self.radius:
                    path.extend(self._arc(quadrant=quadrant,
                                          cw=angle == UP,
                                          radius=self.radius,
                                          center=(x - self.radius,
                                                  y + sign * self.radius)))
                else:
                    path.append((Path.LINETO, [x, y]))
                path.extend([(Path.LINETO, [x, y + sign * length]),
                             (Path.LINETO, [x - self.shoulder,
                                            y + sign * length]),
                             (Path.LINETO, tip),
                             (Path.LINETO, [x + self.shoulder - flow,
                                            y + sign * length]),
                             (Path.LINETO, [x - flow, y + sign * length])])
                path.extend(self._arc(quadrant=quadrant,
                                      cw=angle == DOWN,
                                      radius=self.radius - flow,
                                      center=(x - self.radius,
                                              y + sign * self.radius)))
                path.append((Path.LINETO, [x - flow, y + sign * flow]))
                label_location = [tip[0], tip[1] + sign * self.offset]
            return tip, label_location