Interactive simulations offer molecular modelers a dynamic way to refine molecular geometries, predict physical properties, and better understand molecular behaviors. One frustration many modelers face is the rigidity of traditional simulation setups, which don’t allow real-time adjustments. SAMSON provides a solution with its interactive simulation capability, which is not only robust but also intuitive to use.
In this guide, we’ll show you how to set up your first interactive simulation using SAMSON. Equip yourself with the insights and skills to perform simulations effectively – from basic molecule building to real-time atom manipulations. If this is your first contact with SAMSON or interactive simulations, this walkthrough will simplify complexities so you can get started immediately.
Setting Up an Interactive Simulation
Here’s how to prepare your system for interactive modeling:
- Add a molecule to simulate: You can select a molecule from the Asset Browser or create one in the viewport. For instance, switching to the Add editor tool (
) allows you to add an atom (e.g., Carbon) with a click. - Add a simulator:
- Navigate to Edit > Add simulator or use the shortcut (Ctrl+Shift+M on Windows/Linux; Cmd+Shift+M on Mac).
- Select an interaction model, such as the Universal Force Field (UFF).
- Choose a state updater, e.g., Interactive modeling.
- Name your simulator (optional) and click OK.
Your added simulator will appear in the Document view, containing components such as the interaction model, the dynamical model, and the Interactive modeling state updater.
Launching the Simulation
To start your simulation, go to Edit > Start simulation or simply press X. You can stop it at any time with the same commands.
You now have a functional interactive simulation environment! While the simulation is running, experiment by dragging atoms in the molecule. You should observe how molecular bonds and geometries adjust dynamically to follow the changes in atom positions. This makes SAMSON’s simulations more hands-on than traditional static ones.
Fine-Tuning Simulation Parameters
For greater control over simulations, the Interactive modeling state updater lets you modify elements such as step size and number of steps. Here’s why this matters:
- Step size: Influences the distance moved at each step of the simulation process, impacting the speed and precision.
- Number of steps: Determines how many iterations your system undergoes when responding to forces. Increasing the number of steps can stabilize more rigid systems.
Experiment with these settings to better understand how your molecules respond. For example, increasing the number of simulation steps can make bond angles and lengths more accurate under external forces.
Conclusion
SAMSON’s interactive simulation tools empower molecular modelers to engage with their systems dynamically. By enabling you to act directly on atoms and observe real-time responses, SAMSON bridges the gap between static setups and hands-on experimentation. Ready to build your molecular simulations? Access the original documentation page here to explore even more features.
SAMSON and all SAMSON Extensions are free for non-commercial use. Learn more and download SAMSON at SAMSON Connect.