Alchemistry

Test:

function calcNextLayer() {
    prevLayer++;

    const layerMaxItemsPerLine = (-1 + prevLayer * 4);
    const layerMaxItemsPerColumn = (-1 + prevLayer * 2);

/*
    f(1) = (1/1)
    f(2) = (5/3)
    f(3) = (9/5)
    f(4) = (13/7)
    f(5) = (17/9)
*/

    const newPoints = [];
    for(let itemX = 0; itemX < layerMaxItemsPerLine; itemX++) {
        for(let itemY = 0; itemY < layerMaxItemsPerColumn; itemY++) {
            let x = (-0.5 * layerMaxItemsPerLine + itemX + 0.5) * itemsFinalDistance + itemsFinalDistance / 2;
            let y = (-0.5 * layerMaxItemsPerColumn + itemY + 0.5) * itemsFinalDistance + itemsFinalDistance / 2;

            if(!positions.find(p => p.x === x && p.y === y)) {
                newPoints.push({ x, y });
            }

            /*if(itemY === 0 || itemY === (layerMaxItemsPerColumn - 1) || itemX === 0 || itemX === (layerMaxItemsPerLine - 1)) {
                newPoints.push({
                    x: (-0.5 * layerMaxItemsPerLine + itemX + 0.5) * itemsFinalDistance,
                    y: (-0.5 * layerMaxItemsPerColumn + itemY + 0.5) * itemsFinalDistance,
                });
            }*/
        }
    }

    positions = [...positions, ...newPoints];

    console.log(newPoints);

    return newPoints;
}