feat: Mapbox custom WebGL layer for utility network with FDEB bundling - #86
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elizabetheonoja-art merged 1 commit intoJun 25, 2026
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Utility-Protocol#51) Renders a dense planar utility graph (pipes/cables/conduits) past the ~10k-edge limit of Mapbox's native line layer by uploading the whole network into one interleaved vertex buffer and drawing it with a single gl.LINES call. - types/network.ts: NetworkEdge/flow/load types, interleaved VertexData, and invariants (50k viewport cap → 15k target, FDEB 40 iters/eps 0.001/0.7 compatibility, DP 5m@z14 / 20m@z16, flow→hue / load→alpha) - utils/geo.ts: equirectangular lng/lat↔meters + normalized mercator projection (Mapbox u_matrix space) - utils/edgeSimplification.ts: Douglas-Peucker with zoom-aware epsilon in meters - utils/edgeBundling.ts: FDEB — subdivide, angle/scale/position compatibility, spring + compatibility-attraction iterations in normalized space, pinned endpoints, convergence early-exit - components/map/UtilityNetworkLayer.ts: CustomLayerInterface (onAdd/render/ prerender/onRemove) — compiles shaders, builds interleaved position+color buffers, draws gl.LINES with the projection matrix; zoom-aware rebuild and setEdges() re-bind; pure buildVertexData/edgeColor helpers - shaders/utilityNetwork.vert/.frag: per-vertex color with optional dash pattern - store/slices/networkSlice.ts: visibility + status-filter store with toggleNetworkVisibility action and filterEdges selector - hooks/useNetworkTopology.ts: fetch GeoJSON LineStrings → NetworkEdge[] - tests for simplification, FDEB, vertex/color builder, the slice, and parsing
elizabetheonoja-art
approved these changes
Jun 25, 2026
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Mapbox GL JS Custom WebGL Layer for Utility Network Topology with FDEB (#51)
Closes #51
What's included
src/types/network.tsNetworkEdge/flow/load types, interleavedVertexData, and invariants (50k viewport cap → 15k target, FDEB 40 iters / ε 0.001 / 0.7 compatibility / 8 subdivisions, DP 5 m @z≤14 → 20 m @z≥16, flow→hue / load→alpha).src/utils/geo.tslng/lat ↔ metersplus normalized Web-Mercator projection (the space Mapbox'su_matrixoperates in).src/utils/edgeSimplification.tssrc/utils/edgeBundling.tssrc/components/map/UtilityNetworkLayer.tsCustomLayerInterface(onAdd/render/prerender/onRemove): compiles shaders, builds interleaved position+color buffers, drawsgl.LINESwith the projection matrix; zoom-bucket rebuild andsetEdges()re-bind. PurebuildVertexData/edgeColorhelpers.src/components/map/shaders/utilityNetwork.{vert,frag}src/store/slices/networkSlice.tstoggleNetworkVisibilityaction andfilterEdgesselector (drives the layer re-bind).src/hooks/useNetworkTopology.tsNetworkEdge[].tests/unit/*