Nimbus

A GPU-accelerated vector map renderer built on wgpu (WebGPU). Nimbus fetches Mapbox Vector Tiles from Woosmap's tile API, decodes the protobuf-based MVT format, and renders polygons, lines, points, icons, and text labels using GPU shaders.

Features

• WebGPU rendering via wgpu — runs on Metal, Vulkan, DX12, and WebGPU in the browser
• Mapbox style JSON support with fill, line, symbol, and background layer types
• Expression engine for data-driven styling (interpolate, step, match, case, let/var, arithmetic, string ops)
• Google Maps styler compatibility for HSL-based color transforms and POI visibility control
• SDF text rendering with PBF glyph atlases, text wrapping, variable anchors, and halo effects
• Icon/sprite rendering with SDF + RGBA dual-mode fragment shader
• Symbol collision detection with fade-in/fade-out animations
• Globe projection at low zoom levels (toggle with G key)
• Raster tile layer support (satellite imagery as textured quads)
• Dual-target: native desktop (winit) and WASM (web workers for tile decode/tessellation)
• iOS support via UniFFI Swift bindings and xcframework
• Tile-relative Mercator encoding for f32 GPU precision at high zoom levels

Quick Start

# Clone and run
git clone <repo-url>
cd wgpu-triangle
cargo run

This opens a window displaying a map centered on Montpellier, France. Use the mouse to pan and scroll to zoom. Press G to toggle globe mode.

Build Targets

See Getting Started for prerequisites and detailed build instructions.