def from_lines(cls, lines, delete_boundary_face=True, precision=None):
"""Construct a FormDiagram from a list of lines described by start and end point coordinates.
Parameters
----------
lines : list
A list of pairs of point coordinates.
precision: str, optional
The precision of the geometric map that is used to connect the lines.
Returns
-------
FormDiagram
A Formdiagram object.
Examples
--------
.. code-block:: python
from compas_tna.diagrams import FormDiagram
form = FormDiagram.from_lines(lines)
"""
from compas.topology import network_find_faces
from compas.datastructures import Network
network = Network.from_lines(lines, precision=precision)
mesh = cls()
for key, attr in network.vertices(True):
mesh.add_vertex(key, x=attr['x'], y=attr['y'], z=0.0)
mesh.halfedge = network.halfedge
network_find_faces(mesh)
if delete_boundary_face:
mesh.delete_face(0)
return mesh
# ==============================================================================
# Main
# ==============================================================================
if __name__ == '__main__':
import compas
from compas.datastructures import FaceNetwork
from compas.topology import network_find_faces
from compas.plotters import FaceNetworkPlotter
network = FaceNetwork.from_obj(compas.get('lines.obj'))
network_find_faces(network, breakpoints=network.leaves())
plotter = FaceNetworkPlotter(network, figsize=(10, 7))
plotter.defaults['vertex.fontsize'] = 8.0
plotter.draw_vertices(
facecolor={key: '#ff0000' for key in network.leaves()},
radius=0.2,
text={key: key for key in network.vertices()}
)
plotter.draw_faces(text={key: str(key) for key in network.faces()}, facecolor='#eeeeee', edgecolor='#eeeeee')
plotter.draw_edges(color={uv: '#ff0000' for uv in network.edges_on_boundary()})
plotter.show()