cgv_layout_fr_bh: Barnes-Hut Fruchterman-Reingold Layout (3D, fast)
In cgvR: Interactive 3D Visualization of Large Cayley Graphs via Vulkan

cgv_layout_fr_bh

R Documentation

Barnes-Hut Fruchterman-Reingold Layout (3D, fast)

Description

Same energy model as cgv_layout_fr but with O(n log n) repulsion approximated through an octree. Suitable for large graphs (10^4+ nodes).

Usage

cgv_layout_fr_bh(
  n_nodes,
  edges,
  n_iter = 200L,
  ideal_len = NULL,
  theta = 1,
  cool = 0.98,
  min_dist = 0.01,
  seed = NULL,
  init = NULL,
  normalize = TRUE
)

Arguments

`n_nodes`	Integer. Number of nodes.
`edges`	Two-column integer matrix `(from, to)`, 1-based.
`n_iter`	Integer. Number of iterations (default 200).
`ideal_len`	Numeric target edge length. If `NULL`, defaults to `n_nodes^(1/3) * 0.8`.
`theta`	Barnes-Hut opening angle (default 1.0). Larger = faster, less accurate.
`cool`	Per-iteration temperature decay (default 0.98).
`min_dist`	Minimum distance clamp for repulsion / edge attraction (default 0.01). Avoids division-by-zero when nodes coincide.
`seed`	Optional integer for reproducible initialization.
`init`	Optional `n_nodes x 3` matrix of initial positions. If `NULL`, uses `rnorm`.
`normalize`	Logical. If `TRUE`, recenters and scales output to `[-15, 15]`. Default `TRUE`.