# Examples from pyvista.UnstructuredGridFilters.delaunay_2d
# =========================================================

# First, generate 30 points on circle and plot them.
import pyvista as pv
points = pv.Polygon(n_sides=30).points
circle = pv.PolyData(points)
circle.plot(show_edges=True, point_size=15)

# Use `delaunay_2d()` to fill the interior of the circle.
filled_circle = circle.delaunay_2d()
filled_circle.plot(show_edges=True, line_width=5)

# Use the `edge_source` parameter to create a constrained Delaunay
# triangulation and plot it.
squar = pv.Polygon(n_sides=4, radius=8, fill=False)
squar = squar.rotate_z(45, inplace=False)
circ0 = pv.Polygon(center=(2, 3, 0), n_sides=30, radius=1)
circ1 = pv.Polygon(center=(-2, -3, 0), n_sides=30, radius=1)
comb = circ0.append_polydata(circ1, squar)
tess = comb.delaunay_2d(edge_source=comb)
tess.plot(cpos='xy', show_edges=True)

# ----------------------------------------------------------------------
# Generated by sphinx-examples-as-code https://github.com/pyvista/sphinx-examples-as-code