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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# vispy: gallery 5:55:5
# Copyright (c) Vispy Development Team. All Rights Reserved.
# Distributed under the (new) BSD License. See LICENSE.txt for more info.
"""
Visualize NetworkX Graph
========================
This example demonstrates how to visualise a NetworkX graph using a VisPy
Graph.
"""
import sys
import networkx as nx
from vispy import app, scene
from vispy.visuals.graphs import layouts
canvas = scene.SceneCanvas(title='Simple NetworkX Graph', size=(600, 600),
bgcolor='white', show=True)
view = canvas.central_widget.add_view('panzoom')
graph = nx.adjacency_matrix(
nx.fast_gnp_random_graph(500, 0.005, directed=True))
layout = layouts.get_layout('force_directed', iterations=100)
visual = scene.visuals.Graph(
graph, layout=layout, line_color='black', arrow_type="stealth",
arrow_size=30, node_symbol="disc", node_size=20,
face_color=(1, 0, 0, 0.2), border_width=0.0, animate=True, directed=False,
parent=view.scene)
@canvas.events.draw.connect
def on_draw(event):
if not visual.animate_layout():
canvas.update()
if __name__ == '__main__':
if sys.flags.interactive != 1:
app.run()
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