Visualizing Graphs in Swift
summary
Recreates the D3 force-directed demo in Swift 3, building an interactive graph that doubles as a physics sim and runs inside a playground. Implements Coulomb repulsion, spring edges and a centering force, updates each frame via CADisplayLink and integrates motion with verlet integration. Uses a quad tree Barnes-Hut approximation to drop O(n^2) repulsion to ~O(n log n), adds Unmanaged pointers and fixed nodes for drag performance, handles hundreds of nodes smoothly and the demo and code are published on GitHub.
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chapters (7)
- 0:00Start
- 1:22Scroll view rubber banding and friction
- 7:03Velocity Verlet
- 9:03Force Directed Graph Layout
- 9:49Coulomb's Law
- 11:29Barnes-Hut Approximation
- 15:10Springs
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