silphius/resources/hoe/projection-check.js

export default function*({ecs, projected}) {
  const layer0 = ecs.get(1).TileLayers.layer(0);
  const layer1 = ecs.get(1).TileLayers.layer(1);
  const filtered = [];
  for (const position of projected) {
    if (
      [224, 225, 226, 227, 242, 243, 244, 245].includes(layer0.tile(position))
      && ![7].includes(layer1.tile(position))
    ) {
      filtered.push(position);
    }
  }
  return filtered;
}