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A #[node_macro::node] function returning a struct tagged with
field is a named output connector (title-cased from the field name,
renamed with #[name("...")], described by its doc comment). By default
the node has a hidden primary output carrying the whole struct with the
fields as secondary outputs; marking at most one field #[primary] makes
that field the primary output instead.
The macro generates one hidden extractor proto node per field plus a
registration keyed by the struct's TypeId. The Graphene preprocessor
recognizes nodes returning a registered struct and substitutes them, in
the transient runtime copy of the network only, with a generated network
exporting each field through its extractor. The destructuring machinery
therefore never appears when drilling into a node, in copied clipboard
content, or in saved documents. When a Memoize implementation is
registered for the struct type, the struct is computed once and shared
across all outputs rather than re-evaluated per output.
The editor derives output counts, names, and types for such nodes from
the registry. The old hand-authored "Split Vec2" and "Split Channels"
wrapper-network definitions are replaced by multi-output split_vec2 and
split_channels proto nodes, with document migrations that keep existing
wires valid since the output indices are unchanged.
The "Position on Path" and "Tangent on Path" nodes are combined into a
single multi-output "Evaluate Path" node whose primary output is the
position and whose secondary output is the tangent angle. A migration
converts old instances, forwarding the shared inputs and remapping the
tangent nodes' downstream connections to the new tangent output index.
The now-redundant "Extract XY" node is removed (its role is subsumed by
Split Vec2's destructuring), and "Extract Channel" becomes a plain helper
used by Split Channels rather than a standalone node.
Your procedural toolbox for 2D content creation
Graphite is a free, open source vector and raster graphics engine, available now in alpha. Get creative with a fully nondestructive editing workflow that combines layer-based compositing with node-based generative design.
Having begun life as a vector editor, Graphite continues evolving into a generalized, all-in-one graphics toolbox that's built more like a game engine than a conventional creative app. The editor's tools wrap its node graph core, providing user-friendly workflows for vector, raster, and beyond. Photo editing, motion graphics, digital painting, desktop publishing, and VFX compositing are additional competencies on the planned roadmap making Graphite into a highly versatile content creation tool.
Learn more from the website, subscribe to the newsletter, consider volunteering or donating, and remember to give this repository a ⭐!
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Support our mission ❤️
Graphite is 100% community built and funded. Please become a part of keeping the project alive and thriving with a donation if you share a belief in our mission:
Graphite strives to unshackle the creativity of every budding artist and seasoned professional by building the best comprehensive art and design tool that's accessible to all.
Mission success will come when Graphite is an industry standard. A cohesive product vision and focus on innovation over imitation is the strategy that will make that possible.
Screenshots
Contributing/building the code
Are you a graphics programmer or Rust developer? Graphite aims to be one of the most approachable projects for putting your engineering skills to use in the world of open source. See instructions here for setting up the project and getting started.
By submitting code for inclusion in the project, you are agreeing to license your changes under the Apache 2.0 license, and that you have the authority to do so. Some directories may have other licenses, like dual-licensed MIT/Apache 2.0, and code submissions to those directories mean you agree to the applicable license(s).