Appendix

Goals

Next Major Goals

• Improve buffer_pool eviction rules
• Use MPI: https://doc.rust-lang.org/book/ch16-02-message-passing.html
• Input-handling via events and functional pipelines
• Show old tiles until new tile is ready / Show mixed tiles, based on availability
• Use a simple style definition
  • type: background/fill/line
  • minzoom/maxzoom
  • source
  • source-layer
  • paint (fill-color)
• Map feeling:
  • Wrap world around in x direction
  • Limit panning in y direction
  • Nicer default map style

Intermediate Goals

• Support multiple projections? PoC such that we are sure the renderer is acceptable

Future Goals

• Very simple text rendering
• Cache tessellation results
  • We have three "caches": downloaded tiles, tessellated tiles, gpu tiles
• Handle missing tiles
• Support different tile raster addressing

Future Ideas

• Use rust-gpu as shading language
• Focus on accessibility of maps: https://www.w3.org/WAI/RD/wiki/Accessible_Maps
• Display in AR: https://developer.apple.com/documentation/arkit/displaying_an_ar_experience_with_metal
• Use tracing framework: tracing

Challenges:

• Accuracy of floating point numbers is very bad for big world view coordinates (Plot)
• Perils of World Space

Create paths for tessellating streets

Streets can have unusual shaped like shown here in Munich. OSM does not offer such data and therefore just renders an ordinary street contour like shown here. Because the data is probably not available this is a very hard challenge.