Function getGridCell

docs/app/js/sanddance-app.js:102419–102427

(p, gridResolution, gridOffset, out)

    ];
}
function getGridCell(p, gridResolution, gridOffset, out) {
    const left = Math.floor((p[0] - gridOffset[0]) / gridResolution) * gridResolution + gridOffset[0];
    const bottom = Math.floor((p[1] - gridOffset[1]) / gridResolution) * gridResolution + gridOffset[1];
    out[0] = left;
    out[1] = bottom;
    out[2] = left + gridResolution;
    out[3] = bottom + gridResolution;
    return out;
}
function moveToNeighborCell(cell, gridResolution, edge) {
    if (edge & 8) {
        cell[1] += gridResolution;