A molecular structure can be easy to inspect while still being hard to explain. When you need to show how a group of atoms changes position, a single static view may not communicate the transformation—and moving atoms without a plan can make a presentation difficult to follow.
SAMSON’s Move atoms animation offers a direct way to create that visual sequence. It interpolates between the positions of the atoms at the animation’s keyframes. The workflow is simple, but a little preparation can make the result much easier for an audience to understand.
Plan the movement before you animate
Start by deciding what the viewer needs to notice. Is the goal to reveal a change in position, compare two arrangements, or show a group moving while the rest of the structure stays in view? A clear purpose helps you choose which atoms to select and where to place them at each keyframe.
Position the atoms at their starting point and select them. In the Animator’s Animation panel, double-click Move atoms to add the animation and its starting keyframe. Then click a later point in the animation track and move the atoms to their intended positions. The animation interpolates between those positions.
Use keyframes as checkpoints
Think of a keyframe as a saved pose in your presentation. The first keyframe establishes the starting position; a later one establishes another position. To add one, click the animation track at the frame where you want the pose, then move the atoms. You can move keyframes along the track if you want to adjust their timing.
This makes it possible to refine a presentation in stages: first establish the start and end positions, then adjust when the change occurs. If you add several keyframes, each becomes another position for the animation to pass through. Take care to check the movement between them, not only the poses themselves.
Keep control of how atoms move
The Move atoms animation includes controllers for moving a system in a style similar to SAMSON’s Move editors. The Animator also lets you set snapping for translations and rotations when needed. Snapping can help when you want deliberate, repeatable increments rather than an unconstrained adjustment.
For more control over the character of the transition, adjust the animation’s easing curve and switch smoothing on or off in its properties. These settings affect how parameters are interpolated between frames. Preview the result and choose the timing that best supports the explanation; the purpose is to make the change readable, not to imply more than the animation shows.
When another editor is useful
You are not limited to the animation’s own controllers. If you want to use another editor, hide the Move atoms controllers by unchecking them in the Document view. Then choose an editor—such as a Move editor or the Twister editor—apply the transformation, add a keyframe in the animation track, and switch back to the Select editor when you are done.
A quick review before sharing
- Check that the intended atoms are selected and that the starting position is clear.
- Review the timing and placement of each keyframe in the track.
- Watch the interpolated movement between keyframes, not just the endpoint poses.
- Adjust easing, smoothing, or snapping if they help make the movement easier to interpret.
- Remove an unwanted keyframe by right-clicking it in the Animator’s Track view and choosing Remove keyframe.
Move atoms is a presentation tool for showing changes in position through keyframes. Treating each pose as a deliberate checkpoint can help turn a confusing sequence of adjustments into a movement viewers can follow.
For the complete instructions, see the Move atoms documentation.
Note: SAMSON and all SAMSON Extensions are free for non-commercial use. Get SAMSON.