egutierrez 4b28ef6774 feat(viz): graph_labels render con LabelPolicy + ImDrawList (issue 0049j) ...

graph_labels_draw pinta etiquetas de nodos sobre el FBO del graph_renderer
via ImDrawList. Politica configurable: always-on para selected/hovered/
pinned, top-N por size*(degree+1), culling por viewport AABB y
min_node_pixel_size. Cap duro = max_visible + |always_*|.

API:
- graph_labels_draw(graph, viewport_state, policy, cb, user)
- graph_labels_draw_at(...)  — variante con rect explicito
- graph_labels_select(...)   — helper puro testeable
- graph_compute_degrees(...) — O(E)

Splitting en dos TUs:
- graph_labels.cpp          — funciones draw (depende de ImGui)
- graph_labels_select.cpp   — helpers puros para tests sin ImGui

12 tests en test_graph_labels (culling, max_visible cap, min_pixel_size,
always_* gating por viewport, top-N por score, edge cases). Todos verdes.

Integrado en demos_graph con UI: toggle Labels, sliders Max visible /
Font / Min px, checkboxes Selected/Hovered/Pinned. Golden de
graph_viewport regenerado.

Cierra issue 0049j.

2026-04-29 23:53:32 +02:00

95 KiB

800x600px

Raw Permalink History