public async Task AddInstancingOrderAsync(
VegetationDetailLevel level,
List <VegetationSubjectEntity> gainedEntities,
List <VegetationSubjectEntity> lostEntities)
{
foreach (var entity in gainedEntities)
{
Preconditions.Assert(entity.Detail.SpeciesEnum == VegetationSpeciesEnum.Grass2SpotMarker,
$"Given entity is not of type spotMarker. It is {entity.Detail.SpeciesEnum}");
var position = entity.Position2D;
var generationArea = MyRectangle.CenteredAt(position, _configuration.GroupSize);
var grassBandInfo = await _grassGroupsGrower.GrowGrassBandAsync(generationArea);
_entityToGrassBand[entity.Id] = grassBandInfo;
}
foreach (var entity in lostEntities)
{
var id = entity.Id;
var bandInfo = _entityToGrassBand[id];
_entityToGrassBand.Remove(id);
_grassGroupsGrower.RemoveGrassBand(bandInfo);
}
}
