From b1810a25fe9b895cf9b64752c09c8b43c012a281 Mon Sep 17 00:00:00 2001 From: silly-spongus <159207316+silly-spongus@users.noreply.github.com> Date: Fri, 20 Sep 2024 20:28:29 -0300 Subject: [PATCH] Improvements to "Query" API Docs Minor improvements, but mostly made this fit more with the PR i made for World --- docs/api/query.md | 58 +++++++++++++++++++++++++++++------------------ 1 file changed, 36 insertions(+), 22 deletions(-) diff --git a/docs/api/query.md b/docs/api/query.md index 57390c8..51abee5 100644 --- a/docs/api/query.md +++ b/docs/api/query.md @@ -2,27 +2,30 @@ A World contains entities which have components. The World is queryable and can be used to get entities with a specific set of components. -# Functions +To create a query, you must utilize [`world:query`](world). -## drain() +## Methods + +### drain +This method will impede it from being reset when the query is being iterated. ```luau function query:drain(): Query ``` -This function will impede it from being reset when the query is being iterated. -## next() +### next +Get the next result in the query. Drain must have been called beforehand or otherwise it will error. ```luau function query:next(): Query ``` -Get the next result in the query. Drain must have been called beforehand or otherwise it will error. -## with() +### with +Adds components (IDs) to query with, but will not use their data. This is useful for Tags or generally just data you do not care for. + ```luau function query:with( ...: Entity -- The IDs to query with ): Query ``` -Adds IDs to query with, but will not use their data. This is useful for Tags or generally just data you do not care for. Example: ::: code-group @@ -45,43 +48,41 @@ for (const [id, position] of world.query(Position).with(Velocity)) { Put the IDs inside of `world:query()` instead if you need the data. ::: -## without() +### without +Removes entities with the provided components from the query. ```luau function query:without( ...: Entity -- The IDs to filter against. ): Query -- Returns the Query ``` -Removes entities with the provided IDs from the query. Example: -::: code-group +::: code-group ```luau [luau] -for _ in world:query(Position):without(Velocity) do +for entity, position in world:query(Position):without(Velocity) do -- Do something end ``` ```ts [typescript] -for (const _ of world.query(Position).without(Velocity)) { +for (const [entity, position] of world.query(Position).without(Velocity)) { // Do something } ``` - ::: -## replace() - +### replace +This function takes a callback which is given the current queried data of each matching entity. The values returned by the callback will be set as the new data for each given ID on the entity. ```luau function query:replace( fn: (entity: Entity, ...: T...) -> U... -- ): () -- The callback that will transform the entities' data ``` -This function takes a callback which is given the current queried data of each matching entity. The values returned by the callback will be set as the new data for each given ID on the entity. Example: -::: code-group +::: code-group ```luau [luau] world:query(Position, Velocity):replace(function(e, position, velocity) return position + velocity, velocity * 0.9 @@ -95,19 +96,17 @@ world $tuple(position.add(velocity), velocity.mul(0.9)), ); ``` - ::: - -## archetypes() +### archetypes +Returns the matching archetypes of the query. ```luau function query.archetypes(): { Archetype } ``` -Returns the matching archetypes of the query. Example: -::: code-group +::: code-group ```luau [luau] for i, archetype in world:query(Position, Velocity).archetypes() do local columns = archetype.columns @@ -124,6 +123,21 @@ for i, archetype in world:query(Position, Velocity).archetypes() do end ``` +```ts [typescript] +for (const [i, archetype] of world.query(Position, Velocity).archetypes()) { + const columns = archetype.columns; + const field = archetype.records; + + const P = field[Position]; + const V = field[Velocity]; + + for (const [row, entity] of archetype.entities) { + local position = columns[P][row]; + local velocity = columns[V][row]; + // Do something + } +} +``` ::: :::info