Grape – A Swift library for force simulation and graph visualization

Grape – a Swift library for force simulation and graph visualization.

Features

Usage

import ForceSimulation

struct Node: Identifiable { ... }

let nodes: [Node] = ... 
let links: [(Node.ID, Node.ID)] = ... 

let sim = Simulation(nodes: nodes, alphaDecay: 0.0005)
sim.createManyBodyForce(strength: -30)
sim.createLinkForce(links: links, originalLength: .constant(35))
sim.createCenterForce(center: .zero, strength: 0.1)
sim.createCollideForce(radius: .constant(5))

See Example for more details.

Performance

Grape uses simd to calculate position and velocity. Currently it takes ~0.13 seconds to iterate 120 times over the example graph. (77 vertices, 254 edges, with manybody, center, collide and link forces. Release build on a M1 Max)

Credits

This library has been greatly influenced by the outstanding work done by D3.js (Data-Driven Documents).

Grape on GitHub: https://github.com/li3zhen1/Grape
Platform: iOS
⭐️: 47