New nodes: Colors to Gradient, Flatten Color, and Flatten Gradient

[Keavon]

Closes #2875 in the simple case, but doesn't yet support assigning stop or midpoint positions which will probably need to wait on #1832 to be done ergonomically.

[gemini-code-assist]

Summary of Changes

Hello @Keavon, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request significantly expands the graphic node system by providing robust mechanisms for handling color and gradient data. It introduces core flattening functionalities within the graphic-types library to isolate color and gradient elements from complex graphic tables. These capabilities are then exposed as new nodes in the node graph, alongside a utility node to convert a collection of colors into a gradient, offering greater flexibility and control over graphic composition.

Highlights

• New Flattening Capabilities: Introduced new methods to deeply flatten graphic tables, allowing extraction of only Color or GradientStops elements while preserving transformations and alpha blending.
• New Node Graph Nodes: Added three new nodes: Flatten Color, Flatten Gradient, and Colors to Gradient, enhancing the graphic manipulation toolkit.
• Node Relocation: The Index Elements node was relocated within the graphic nodes for improved organization and accessibility.

Changelog

• node-graph/libraries/graphic-types/src/graphic.rs
  • Added into_flattened_color_table method to the IntoGraphicTable trait for extracting color elements from graphic tables.
  • Added into_flattened_gradient_table method to the IntoGraphicTable trait for extracting gradient elements from graphic tables.
• node-graph/nodes/graphic/src/graphic.rs
  • Added index_elements node to retrieve elements from various collections by index, supporting negative indices.
  • Added flatten_color node, which utilizes the new into_flattened_color_table to output a table of colors.
  • Added flatten_gradient node, which utilizes the new into_flattened_gradient_table to output a table of gradient stops.
  • Added colors_to_gradient node to construct a GradientStops object from a table of colors, distributing them evenly.
  • Imported GradientStop from vector_types for use in gradient-related functionalities.

Activity

• The pull request description indicates that it 'Closes Node for constructing a Gradient #2875 in the simple case', suggesting it addresses a known issue related to color and gradient handling.
• The author, Keavon, has included two images in the PR description, likely demonstrating the functionality of the new nodes.

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[cubic-dev-ai]

No issues found across 2 files

[gemini-code-assist]

Code Review

This pull request introduces new nodes for creating gradients from colors and for flattening color and gradient tables within the graphic structure. The implementation adds into_flattened_color_table and into_flattened_gradient_table methods and their corresponding nodes, along with a colors_to_gradient node. The changes are well-implemented and add valuable functionality. I have a couple of suggestions to improve code maintainability and readability.