Exploring molecular trajectories effectively is often a crucial need for molecular modelers working with dynamic systems and conformational changes. SAMSON provides a solution to this task with its Play Path animation feature, which allows users to visualize and better understand molecular motions by animating paths between keyframes. This blog post explores how to make the most of this feature to enhance your molecular modeling.
What is the Play Path Animation?
The Play Path animation lets you animate a single path or multiple paths connecting two frames. Whether you’re interested in investigating a molecule’s trajectory or cycling through different conformations, this animation tool is designed to simplify the process. If multiple paths are selected, they can be synchronized, giving a coherent, unified view of complex motions.
One of the standout features of this tool is its ability to handle different numbers of frames. When the number of frames in the animation and the path differ, SAMSON applies smoothing to align the path with the animation. For users seeking to observe the raw motion without smoothing, this behavior can be disabled in the Inspector.
Getting Started: Adding the Play Path Animation
To begin animating molecular paths in SAMSON:
- Select the Path node that you want to visualize. In SAMSON, a path node holds trajectory information about your system.
- Navigate to the Animation panel within the Animator.
- Double-click on the Play Path animation effect to add it to your workspace.
By default, the entire selected path is played between two keyframes. You can drag and adjust the position of these keyframes to customize the range and speed of the animation.
Note
You can always adjust the keyframes during the animation, enabling maximum flexibility for your visualization.

Advanced Control: Animation Properties
For users seeking even more control over the playback, the Play Path animation offers additional customization. By modifying the Easing curve, you can dictate how animation parameters are interpolated between frames. This is particularly useful for fine-tuning the pacing and flow of your molecular motions to better match your research objectives.
Below is a visualization of the options available for this animation in the Inspector:

Transform Your Molecular Visualizations
By leveraging the Play Path animation, molecular modelers can transform the way they explore and communicate molecular motions. Whether you’re visualizing a protein’s folding pathway, exploring a ligand’s binding trajectory, or investigating structural transitions, this animation tool offers a straightforward approach to reveal the dynamic story of your system, adding a compelling layer of insight to your workflow.
To dive deeper into the Play Path animation and its capabilities, visit the official documentation page: https://documentation.samson-connect.net/users/latest/animations/play-path/.
SAMSON and all SAMSON Extensions are free for non-commercial use. You can download SAMSON at https://www.samson-connect.net.
