An OpenGL renderer for [Mapbox vector tiles](https://www.mapbox.com/blog/vector-tiles), implemented in C++, targeting iOS & OSX. # Build instructions ## Mac OS X You may need to install [glfw3](http://www.glfw.org/docs/latest/): ``` brew install homebrew/versions/glfw3 ``` ``` mkdir xcode cd xcode cmake .. -G Xcode ``` Then open the xcode project and build. # Style protobuf We're encoding the styling information as a protocol buffer, according to proto/style.proto. The reason for doing so is that we don't have to ship with a JSON/yaml parser. To test the conversion script, run ``` bin/convert-style.js | protoc --decode=style proto/style.proto ``` You should see a nicely formatted hierarchical output of the converted style. To update the included default style, use ``` bin/convert-style.js > resources/style.pbf && bin/build-style.js ``` # Usage - Press 'R' to reset the transform - Press 'N' to reset north - Press Tab to toggle debug information - Press Esc to quit