Testing out JmonkeyEngine to make a game in Scala with Akka Actors within a pure FP layer
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package wow.doge.mygame.implicits
import com.simsilica.es.ComponentFilter import com.simsilica.es.EntityComponent import com.simsilica.es.EntityData import com.simsilica.es.EntitySet import com.simsilica.es.Filters import scala.reflect.ClassTag import scala.util.Try
class EntityQuery(ed: EntityData) { private var cfilter: Option[ComponentFilter[_ <: EntityComponent]] = None private val buf = collection.mutable.ListBuffer.empty[Class[_]]
def filter[T <: EntityComponent](field: String, value: Object)(implicit ev: ClassTag[T] ): EntityQuery = { val c = ev.runtimeClass.asInstanceOf[Class[T]] cfilter = Try(Filters.fieldEquals(c, field, value)).toOption this }
def filterOr[T <: EntityComponent](operands: ComponentFilter[_ <: T]*)( implicit ev: ClassTag[T] ): EntityQuery = { val c = ev.runtimeClass.asInstanceOf[Class[T]] cfilter = Try(Filters.or(c, operands: _*)).toOption this }
def filterAnd[T <: EntityComponent](operands: ComponentFilter[_ <: T]*)( implicit ev: ClassTag[T] ): EntityQuery = { val c = ev.runtimeClass.asInstanceOf[Class[T]] cfilter = Try(Filters.and(c, operands: _*)).toOption this }
def component[T <: EntityComponent]()(implicit ev: ClassTag[T] ): EntityQuery = { val c = ev.runtimeClass buf += c this }
def components[T <: EntityComponent](lst: Class[T]*): EntitySet = { ed.getEntities(lst: _*) }
def result: EntitySet = cfilter.fold(ed.getEntities(buf.toList: _*)) { filters => ed.getEntities(filters, buf.toList: _*) } }
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