ECS Enhancements

src/dusk/entity/component.h

@@ -60,13 +60,40 @@ void componentInit(
  * 
  * @param entityId The entity ID.
  * @param componentId The component ID.
+ * @param type The type of the component to get, only used for assertion.
  * @return A pointer to the component data.
  */
 void * componentGetData(
+  const entityid_t entityId,
+  const componentid_t componentId,
+  const componenttype_t type
+);
+
+/**
+ * Gets the index of a component for the entity with component ID.
+ * 
+ * @param entityId The entity ID.
+ * @param componentId The component ID.
+ * @return The index of the component in the component array.
+ */
+componentindex_t componentGetIndex(
   const entityid_t entityId,
   const componentid_t componentId
 );
 
+/**
+ * Gets the entity IDs of all entities with a component of the given type.
+ * 
+ * @param type The type of the component to get entities for.
+ * @param outEntities An array to write the entity IDs to, must be at least
+ * ENTITY_COUNT_MAX in size.
+ * @return The number of entity IDs written to outEntities.
+ */
+entityid_t componentGetEntitiesWithComponent(
+  const componenttype_t type,
+  entityid_t outEntities[ENTITY_COUNT_MAX]
+);
+
 /**
  * Disposes of a component for the entity with component ID.
  *