silphius/public/assets/tomato-seeds/projection-check.js

const filtered = []

for (let i = 0; i < projected.length; ++i) {
  const x0 = projected[i].x * layer.tileSize.x;
  const y0 = projected[i].y * layer.tileSize.y;
  const entities = Array.from(ecs.system('VisibleAabbs').within({
    x0,
    x1: x0 + layer.tileSize.x - 1,
    y0,
    y1: y0 + layer.tileSize.y - 1,
  }));
  let hasPlant = false;
  for (let j = 0; j < entities.length; ++j) {
    if (entities[j].Plant) {
      hasPlant = true
    }
  }
  if (!hasPlant) {
    const tile = layer.tile(projected[i])
    if ([7].includes(tile)) {
      filtered.push(projected[i])
    }
  }
}

return filtered