# Untitled

unknown
python
a year ago
3.3 kB
2
Indexable
Never
```from matplotlib.path import Path
from matplotlib.patches import PathPatch

def interpolate_points(ax, x, y, pad, open=True, absolute_pad=False, **kwargs):
codes = []
verts = []
if open:
# First point
code = Path.MOVETO
vert = (x[0], y[0])
codes.append(code)
verts.append(vert)
# Interpolate points between
for i in range(1, len(x)-1):
# LINETO (from previous to this point)
code = Path.LINETO
dx = (x[i] - x[i-1]) * (1 - pad)
dy = (y[i] - y[i-1]) * (1 - pad)
xij = x[i-1] + dx
yij = y[i-1] + dy
vert = (xij, yij)
codes.append(code)
verts.append(vert)
# CURVETO
code = Path.CURVE3
xij = x[i]
yij = y[i]
vert = (xij, yij)
codes.append(code)
verts.append(vert)
# CURVETO
code = Path.CURVE3
xij = x[i] + (x[i+1] - x[i]) * pad
yij = y[i] + (y[i+1] - y[i]) * pad
vert = (xij, yij)
codes.append(code)
verts.append(vert)
# Last point
code = Path.LINETO
vert = (x[-1], y[-1])
codes.append(code)
verts.append(vert)
else:
# First point
code = Path.MOVETO
xij = x[0] + (x[1] - x[0]) * pad
yij = y[0] + (y[1] - y[0]) * pad
vert = (xij, yij)
codes.append(code)
verts.append(vert)
# Interpolate points between
for i in range(1, len(x)-1):
# LINETO
code = Path.LINETO
xij = x[i-1] + (x[i] - x[i-1]) * (1 - pad)
yij = y[i-1] + (y[i] - y[i-1]) * (1 - pad)
vert = (xij, yij)
codes.append(code)
verts.append(vert)
# CURVETO
code = Path.CURVE3
xij = x[i]
yij = y[i]
vert = (xij, yij)
codes.append(code)
verts.append(vert)
# CURVETO
code = Path.CURVE3
xij = x[i] + (x[i+1] - x[i]) * pad
yij = y[i] + (y[i+1] - y[i]) * pad
vert = (xij, yij)
codes.append(code)
verts.append(vert)
# Last point
code = Path.LINETO
xij = x[-2] + (x[-1] - x[-2]) * (1 - pad)
yij = y[-2] + (y[-1] - y[-2]) * (1 - pad)
vert = (xij, yij)
codes.append(code)
verts.append(vert)
# CURVETO
code = Path.CURVE3
xij = x[-1]
yij = y[-1]
vert = (xij, yij)
codes.append(code)
verts.append(vert)
# CURVETO
code = Path.CURVE3
xij = x[-1] + (x[0] - x[-1]) * pad
yij = y[-1] + (y[0] - y[-1]) * pad
vert = (xij, yij)
codes.append(code)
verts.append(vert)
# Back to first point
code = Path.LINETO
xij = x[-1] + (x[0] - x[-1]) * (1 - pad)
yij = y[-1] + (y[0] - y[-1]) * (1 - pad)
vert = (xij, yij)
codes.append(code)
verts.append(vert)
# CURVETO
code = Path.CURVE3
xij = x[0]
yij = y[0]
vert = (xij, yij)
codes.append(code)
verts.append(vert)
# CURVETO
code = Path.CURVE3
xij = x[0] + (x[1] - x[0]) * pad
yij = y[0] + (y[1] - y[0]) * pad
vert = (xij, yij)
codes.append(code)
verts.append(vert)

rounded_verts = Path(verts, codes)
rounded_verts = PathPatch(rounded_verts, **kwargs)
ax.add_patch(rounded_verts)

fig = matplotlib.pyplot.figure(dpi=220)
box = fig.hbox(1)
ax = box.children[0]

x = np.array([0.25, 0.25, 0.75, 0.75])
y = np.array([0, 1, 1, 0])

interpolate_points(ax, x, y, 0.2, open=False, facecolor=dv.colors['green'][2], edgecolor=dv.green)```