Molecular modelers often face the challenge of tracking specific atoms or groups of atoms while they move during simulations. This process can feel cumbersome, especially when you need to consistently adjust your camera to keep up with the movements of your subject. The ‘Follow Atoms’ animation in SAMSON is a handy feature designed to address this very issue, making it simple to stay focused on molecular motion as it unfolds.
What Is the ‘Follow Atoms’ Animation?
The ‘Follow Atoms’ animation allows your camera to continuously follow a group of atoms selected at the animation’s creation. By preserving a constant distance between the camera and the target atoms, the animation makes it effortless to observe dynamic behavior in molecular systems, without the need for manual camera adjustments. This is particularly useful when you’re analyzing the structural evolution of a specific part of a molecule or complex system over time.
How to Set Up the ‘Follow Atoms’ Animation
Setting up the ‘Follow Atoms’ animation is straightforward. Here’s a step-by-step guide:
- Select the atoms: First, select the atoms you want the camera to follow. You can also adjust your current camera orientation to set the desired view.
- Open the Animator: Locate the start frame in the Animator’s Track view.
- Add the animation: Double-click on the ‘Follow Atoms’ animation in the Animation panel of the Animator. This will link the animation to your selected atoms.
The camera target will follow the geometric center of the selected atom group, while the camera’s overall position maintains a constant vector with respect to the target. The current camera position at the start frame is preserved for continuity, and adjustments can be made to the end frame as needed to match your simulation goals.
Customizing and Fine-Tuning
One of the most valuable aspects of the ‘Follow Atoms’ animation is its flexibility. You can adjust the start and end frames of the animation as your needs evolve. Additionally, it is possible to modify specific camera behaviors, such as:
- Target camera: By default, the animation applies to the active camera, but you can change this by inspecting the animation and modifying the ‘Apply to active camera’ option.
- Upward behavior: To set the camera’s movement depending on the presence of a grid, toggle the ‘Keep camera upwards’ option during inspection.
For even more control, use the animation controllers to adjust the camera positions throughout the animation, while preserving the target as the geometric center of the specified atoms.
Why Use ‘Follow Atoms’?
Whether you’re visualizing protein binding, tracking ligand movements, or analyzing complex trajectories, the ‘Follow Atoms’ animation simplifies the process. It ensures that you stay focused on the area of interest, freeing you up to concentrate on your analysis rather than continuously repositioning your camera.
Learn more about this feature and its properties in the official documentation.
Note: SAMSON and all SAMSON Extensions are free for non-commercial use. You can download SAMSON at https://www.samson-connect.net.