Custom grids × Rive — floating panel that authors snappable grid guides in the Rive editor via its MCP server
View on GitHub ↗Custom grids × Rive. A tiny always-on-top panel that authors snappable grid guides directly in the Rive editor by talking to its MCP server — fully deterministic, no agent, no AI.
https://github.com/user-attachments/assets/d84c0d76-1ec3-4a02-b21a-2ad90464b854
Script-rendered grids (node scripts, path effects) are computed at render time, so the Rive editor's vertex snapping never sees them. Griddle instead authors real PointsPath geometry through the editor's own MCP tooling: every grid line endpoint and lattice point is a genuine, snappable vertex.
The Rive editor exposes an MCP server over HTTP at http://127.0.0.1:9791/mcp (streamable HTTP, stateless — a bare JSON-RPC tools/call works with no session handshake). Griddle:
1. Lets you pick a grid type and its properties (progressive disclosure — only the selected grid's parameters are shown). 2. Generates the grid geometry in plain JavaScript. 3. Assembles one patheditor createShapes tool call and POSTs it via a ~20-line Rust command.
- Cartesian: Rectangular (+subdivisions, +cell gutters), Dot (snap crosses — the lattice point is a path vertex), Baseline (leading +subdivisions), Brick (offset running bond) - Angular: Isometric (angle + optional verticals), Triangular, Diamond, Hexagonal (pointy-top honeycomb — shared row boundaries authored as single zigzag polylines, every hex corner snappable), Polar (concentric rings + spokes, movable center) - Perspective: One-point (VP + horizon + receding floor lines), Two-point (two VPs, off-canvas positions allowed) - Composition: Golden ratio (phi lines + spiral), Rule of thi
From the project README.
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