A molecular structure can be difficult to understand from a single viewpoint. A carefully framed orbit can reveal how parts of an assembly relate in three dimensions—but an orbit that circles the wrong point or moves through an unhelpful plane can make the structure harder to follow. In SAMSON, the Orbit camera animation lets you create a camera movement around a target point. The key to a useful result is to set up the view before you add the animation, then refine the path with its controls.
Start with the view you want to rotate from
First, orient the camera in the plane in which you want it to travel around the object. This initial view matters: it helps determine the orbit’s rotation plane, so take a moment to choose an angle that shows the molecular features you want viewers to notice.
When the view is ready, open the Animator’s Animation panel and double-click Orbit camera. Set the animation’s end frame to suit the length of your presentation. The animation is added to the timeline, where you can preview how the camera moves around the structure.
Practical tip: decide what the orbit should help someone see before adjusting its duration. For example, use the starting view to frame a feature of interest, then check whether the movement makes the surrounding structure easier to interpret. The animation changes the viewpoint; it does not replace the need to choose a clear starting frame.
Know what sets the orbit’s center and plane
By default, camera animations apply to the active camera. The Orbit camera animation uses that camera’s current target position as its target point—essentially, the center of the current view. If the orbit seems to circle an unexpected point, inspect the animation and check whether Apply to active camera is enabled. You can change that option in the Inspector.
The rotation plane also depends on the view and on whether the grid is on:
- Grid off: the plane passes through the central horizontal line of the view and the target point.
- Grid on: the plane passes through that central horizontal line in a plane parallel to the grid plane.
The Keep camera upwards option affects how the animation behaves in relation to the grid being on or off. Inspect this setting if the camera’s orientation during the orbit is not what you expect. You can also change how camera parameters interpolate between frames using the animation’s Easing curve.
Fine-tune the camera path visually
For more precise positioning, use the animation’s camera controllers to adjust the target point and rotation plane. The controllers also support adjusting camera positions and orientations. Their keyframe numbers are shown near the controllers in the view, helping you identify which part of the animation you are editing.
If the controllers are not visible, zoom out in the view. While editing camera positions, SAMSON displays thumbnails at the bottom of the view to help you compare framing and choose shots. This makes it easier to check whether important regions stay in view as the camera moves.
A quick review before sharing
- Check that the starting view shows the molecular context you want to communicate.
- Confirm that the active camera’s target point is an appropriate center for the orbit.
- Review how the grid setting and Keep camera upwards option affect the rotation plane and orientation.
- Preview the movement and adjust the end frame, camera positions, or easing if needed.
For the complete instructions and additional examples, see the Orbit camera documentation.
Note: SAMSON and all SAMSON Extensions are free for non-commercial use. Get SAMSON.