GraphiteEditor/Graphite

Add node that plots graphs as geometry using parametric equations

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#2,458 opened on Mar 18, 2025

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 (5 comments) (2 reactions) (0 assignees)Rust (25,662 stars) (1,176 forks)batch import
Good First IssueGraphics

Description

I wanted to draw this illustration using graphite, but ended up using desmos and screenshotting it, because they support parametric equations. It will be nice to have such a node.

I think that in this node we should be able to specify density of the geometry (amount of points), because different equations require different density, and it can affect performance.

I think there also should be density multiplier for the export rendering (if there is such a regime). So that at the editing stage we may see segmented geometry, and for the final render it will be smooth.

Also, unsolved problem: how to make this node accept any amount of variables (so that you can tweak behavior of your equation, like l in my example). This is also the problem for the Math node. Without this, this node will be not as useful is it might be. (#2462, and see also #2459)

Contributor guide

Tech stack
rust
Domain
desktop
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
RustNode system basicsParametric equations
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
35
Research direction
Investigate how the existing Math node handles variables (see issue #2462). Review the node system architecture to understand how to add a new node type. Consider implementing parametric equation parsing and geometry generation. Pay attention to density control and export multiplier. Coordinate with maintainers on variable input design.