# modules/pineal/ — Data-viz agnóstica (era lapaloma)

**Propósito.** Motor de gráficos con backends pluggables. Los crates
de visualización no conocen `gpui` ni `wgpu`: hablan contra el trait
`Canvas`, y producen un `RenderPlan` que cada backend ejecuta.

## Crates

| crate              | tipo | rol                                                  |
| ------------------ | ---- | ---------------------------------------------------- |
| `pineal-core`      | lib  | Datos: Series, Point, Rect, Color, RingBuffer        |
| `pineal-render`    | lib  | Trait `Canvas` + `RenderPlan` + backend GPUI (feat)  |
| `pineal-cartesian` | lib  | Axes + viewport + series sobre coord cartesiano      |
| `pineal-financial` | lib  | Candlestick, OHLC sobre cartesian                    |
| `pineal-stream`    | lib  | Streaming a 60Hz desde RingBuffer                    |
| `pineal-phosphor`  | lib  | Trail CRT con alpha decay sobre stream               |
| `pineal-polar`     | lib  | Coord polar (stub)                                   |
| `pineal-heatmap`   | lib  | Grid 2D color-mapped (stub)                          |
| `pineal-treemap`   | lib  | Rectangular treemap (stub)                           |
| `pineal-flow`      | lib  | Sankey/flow diagrams (stub)                          |
| `pineal-mesh`      | lib  | Triangle mesh + barycentric (stub)                   |
| `pineal-export`    | lib  | SVG/PNG export del RenderPlan                        |
| `pineal-umbrella`  | lib  | Re-export con features `core/render/cartesian/...`   |

## Dependencias

- Todos ← `pineal-core`. Render-dependientes ← `pineal-render`.
- Backend GPUI: feature gate `gpui` en pineal-render activa
  `gpui_backend.rs` (consumido por widgets en `apps/pineal-*-demo`).

## Estado

LOC ~3,900. 5 charts implementados (cartesian/financial/stream/phosphor
/export). 5 stubs (<50 LOC c/u: polar, heatmap, treemap, flow, mesh).
Roadmap: completar los 5 stubs en orden polar → heatmap → treemap.