Making Molecular Visualization Clearer with Light Attributes in SAMSON

When working on intricate molecular models, clarity in visualization can be a major challenge. SAMSON’s Light Attributes in the Node Specification Language (NSL) offer a powerful toolset to address this pain point. These attributes allow users to manage the visibility and selection of light nodes, ensuring the focus remains on what really matters in your molecular modeling workflow. In this blog post, we’ll explore how to leverage these attributes for efficient and customizable visualization.

What Are Light Attributes?

Light attributes operate in the light (li) attribute space, specifically designed for targeting and interacting with light nodes. These allow you to refine visualizations, toggle visibility, manage selection, and apply naming conventions to light nodes. The refinement they offer can make your molecular models easier to interpret, especially in complex systems.

Key Light Attributes

Here are some of the most useful light attributes you can use:

  • Hidden (li.h): Controls whether a light node is entirely hidden. Possible values are true or false. Examples include li.h (hidden) or not li.h (visible).
  • Name (li.n): Assigns or queries a name to light nodes using strings. Examples include li.n "A" or li.n "L*" (wildcard use).
  • Selected (li.selected): Indicates whether a light node is selected. The short name (s) is not used here. Examples include li.selected or not li.selected.
  • Selection Flag (li.sf): Identifies or modifies the selection flag status of light nodes. Examples include li.sf false or li.sf (active).
  • Visibility Flag (li.vf): Indicates the visibility flag on a node. Examples include li.vf false (not visible) or li.vf.
  • Visible (li.v): Controls whether light nodes are visible. Examples include li.v for visible or not li.v for hidden.

Practical Use Case for Molecular Modelers

Let’s say you’re visualizing a model where various molecular interactions are illuminated using light nodes. By defining attributes like li.h and li.v, you can selectively toggle the visibility of certain light nodes in your workspace. This streamlines your view, helping you highlight specific regions of the molecule while minimizing distractions.

For instance, to hide a particular light node named ‘A,’ you could use:

Or, to emphasize nodes that are visible but not yet selected, you could use:

These small but powerful filters make a significant difference in simplifying complex visualization tasks.

Learn More

To explore the full range of light attributes and learn more about their application, visit the official SAMSON NSL Light Attributes Documentation.

Note: SAMSON and all SAMSON Extensions are free for non-commercial use. You can get SAMSON at https://www.samson-connect.net.

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