# Network Generation pylimer-tools includes a powerful Monte Carlo-based network generator for creating realistic polymer systems. This tools is particularly useful for generating quick initial configurations for molecular dynamics simulations, or for doing fast predictions of the viscoelasticity using the [`NormalModeAnalyzer`](../../api/pylimer_tools_cpp.NormalModeAnalyzer.html.md#pylimer_tools_cpp.NormalModeAnalyzer) or the [`pylimer_tools_cpp.MEHPForceBalance`](../../api/pylimer_tools_cpp.MEHPForceBalance.html.md#pylimer_tools_cpp.MEHPForceBalance) and its variants. For more options, examples and advanced usage, see the [test suite](https://github.com/GenieTim/pylimer-tools/tree/main/tests) and the modules API reference, particularly of the [`MCUniverseGenerator`](../../api/pylimer_tools_cpp.MCUniverseGenerator.html.md#pylimer_tools_cpp.MCUniverseGenerator) class. The network generation system allows you to: - Create end-linked and vulcanized polymer networks with controllable topology - Generate solvent chains and background molecules - Control crosslinking degree and functionality - Set realistic bead distances and box sizes The [`MCUniverseGenerator`](../../api/pylimer_tools_cpp.MCUniverseGenerator.html.md#pylimer_tools_cpp.MCUniverseGenerator) class is the main interface for network generation. The initial method was introduced in Gusev [[Gus19](../../acknowledgements.html.md#id8)], the current implementation is more powerful, as needed for Bernhard and Gusev [[BG25](../../acknowledgements.html.md#id12)].
![](auto_examples/network_generator/images/thumb/sphx_glr_plot_save_network_thumb.png) [Save Generated Network](plot_save_network.html.md)
Save Generated Network
![](auto_examples/network_generator/images/thumb/sphx_glr_plot_simple_crosslinked_network_thumb.png) [Simple Crosslinked Network](plot_simple_crosslinked_network.html.md)
Simple Crosslinked Network
![](auto_examples/network_generator/images/thumb/sphx_glr_plot_add_angles_thumb.png) [Adding Topology Information](plot_add_angles.html.md)
Adding Topology Information
![](auto_examples/network_generator/images/thumb/sphx_glr_plot_polydisperse_system_thumb.png) [Generate a Polydisperse Polymer Network](plot_polydisperse_system.html.md)
Generate a Polydisperse Polymer Network
![](auto_examples/network_generator/images/thumb/sphx_glr_plot_multi_component_system_thumb.png) [Multi-Component System](plot_multi_component_system.html.md)
Multi-Component System
![](auto_examples/network_generator/images/thumb/sphx_glr_plot_monte_carlo_configuration_thumb.png) [Monte Carlo Configuration](plot_monte_carlo_configuration.html.md)
Monte Carlo Configuration
![](auto_examples/network_generator/images/thumb/sphx_glr_plot_vulcanized_network_thumb.png) [Generate Vulcanized Networks](plot_vulcanized_network.html.md)
Generate Vulcanized Networks
![](auto_examples/network_generator/images/thumb/sphx_glr_plot_custom_crosslinking_callback_thumb.png) [Custom Crosslinking with Callback Functions](plot_custom_crosslinking_callback.html.md)
Custom Crosslinking with Callback Functions
![](auto_examples/network_generator/images/thumb/sphx_glr_plot_tetra_peg_network_thumb.png) [Tetra-PEG Network Generation](plot_tetra_peg_network.html.md)
Tetra-PEG Network Generation