Function hexKey

packages/webapp/components/world/engine/world.js:7084–7084

(q,r)

const DIRS=[[1,0],[0,1],[-1,1],[-1,0],[0,-1],[1,-1]];   // ordered by bearing
const hexXZ=(q,r)=>[1.5*HC*q, Math.sqrt(3)*HC*(r+q/2)];
const hexKey=(q,r)=>q+','+r;
const hexCorner=k=>[Math.cos(k*Math.PI/3)*HC, Math.sin(k*Math.PI/3)*HC];
/* World point -> the cell that contains it. Cube rounding, the standard trick;
   this is the whole of the picking system — no raycast, no colliders. */