A molecular animation can be scientifically clear and still be difficult to watch if the camera drifts away from the feature you want people to follow. Reframing between shots may help, but during an animation the camera’s position and its point of focus both matter. The Dolly camera animation in SAMSON lets you define a camera position and target at the beginning and end of an animation, then move between them over time.
This is useful when you want to guide attention across a molecular system or approach a region while changing what the camera is looking at. It can also help when working with effects such as Fog and Depth-of-field, where the target point can be relevant to the appearance of the effect.
Why the target matters
A camera move is not only a change in distance. If the camera changes position while continuing to look at a fixed point, the view behaves differently than it does when the target also changes. Dolly camera supports this two-point setup: its start and end states include camera positions and target points. That gives you a way to shift the view’s focus during the move, rather than relying on a single target point throughout.
This distinction can make planning easier. Before adding the animation, decide what the viewer should be looking at at the start and what should be centered at the end. For example, you might begin with a broader view of a system and finish with a closer view of a region of interest. The key is to set each view intentionally; the animation then connects those endpoints.
Build the move in the Animator
- In the Animator’s Track view, choose the frame where the move should begin.
- Orient the view and camera to establish the starting composition. Take a moment to check that the intended starting feature is clearly visible.
- In the Animator’s Animation panel, double-click Dolly camera.
- Set the animation’s end frame, then establish the desired ending view. You can move the start and end frames later if the timing needs adjustment.
The animation is applied to the active camera by default. Its target point is defined using the active camera’s current target position, which is essentially the current center of the view. If you need to change which camera the animation affects, inspect the animation and adjust Apply to active camera.
Check the details before refining
Camera positioning can behave differently depending on whether the grid is on or off. The Keep camera upwards option controls whether the animation’s behavior depends on that grid state: inspect the animation to check or change the option. This is worth checking if the camera’s orientation does not match what you expected.
You can also adjust how camera parameters change between the start and end frames by choosing an Easing curve. If the camera’s path or focus needs further adjustment, use the animation controllers to edit its target points and positions. For a movement that changes camera position but uses only one target point, compare Dolly camera with Zoom camera. The Move camera animation is another related option.
Thinking in terms of a starting view, an ending view, and the target point at each stage can make camera animations easier to plan—and easier for viewers to follow. For setup details, see the Dolly camera documentation.
Note: SAMSON and all SAMSON Extensions are free for non-commercial use. Get SAMSON.