Coordinate systems for ‹game world› and ‹game boards›

[olange]

As a developer, I'd like to know how to name and locate «the things» of the game, so that we can talk to each other 😸 about things, that would not be just things anymore.

More precisely: choose terms to designate the parts of our ‹world space›, ‹screen space›, ‹game world› and ‹game boards› (we have coined four terms!); describe the topologies of the ‹world space› (spherical/‹lat,long,alt›), ‹screen space› (2D/pixels), ‹game world› (flat or spherical? circular? surface or volume?) and the ‹game boards› (hexgrids, but why?); and choose coordinate systems, matching each topology. Explain how the ‹World Space› is partitioned in a ‹Game World›; and how the later is partitioned in ‹Game Boards›. Choose tuples of letters, to designate components of coordinates.

Actions

• [ ] Topology & coordinate system for the ‹World Space› TODO 2D & 3D / physical world (lat/long/alt)
• [ ] Topology & coordinate system for the ‹Screen Space› TODO ultimately, 2D / pixels
• [ ] Topology & coordinate system for ‹Game World› TODO geodesic H3 / spherical world (flat? or with altitude?)
• [ ] Topology & coordinate system for ‹Game Boards› TODO Hexgrid (honeycomb) and … coordinate system; what do we need to locate: faces, edges and/or vertices? do we have altitude?
• [ ] Tuples of letters for every coordinate system TODO
• [ ] Explainer document: which problems do we need to solve? TODO
• [ ] Explainer document: why such topologies for the ‹Game World› and ‹Game Boards› TODO
• [ ] Explainer document: characteristics of each coordinate system TODO
• [ ] Explainer document: coordinate transformations TODO pipeline of the coordinate transformations
• [ ] Describe the terms used to designate parts of the ‹Game World› and ‹Game Boards› TODO
• [ ] Describe the topology of the ‹Game World› TODO
• [ ] Describe the topology of a ‹Game Board› TODO
• [x] Define location of an origin game board in the ‹Game World› DONE 17.03 OL see comment below

Documents

• ObservableHQ › Hexagonal game board uses cube coordinates and ring algorithm to draw the board
• Wiki › Geometry of the game – Inspiration
• Wiki › Geometry of the game – Explainer
• Wiki › Geometry of the game – Coordinate systems

Reference articles

• Amit’s Thoughts on Grids Red Blob Games, Amit Patel, 09.01.2006

[olange]

Location of origin game board

Location of origin game board in the game world — just to get started playing with those coordinates:

$ brew install h3
$ geoToH3 --resolution 15 --latitude 46.1856616 --longitude 6.1579908
8f1f91ad1b84456

Reference articles:

• H3geo › Docs › Table of Cell Areas for H3 Resolutions
• H3geo › Docs › Unix-style Filters for H3
• Google Maps › Help › Obtenir ou indiquer la latitude et la longitude