Rename query.entity() to query.get() and query.get() to query.get_component() (#752)

crates/bevy_ecs/src/schedule/parallel_executor.rs

@@ -564,7 +564,7 @@ mod tests {
             for entity in &mut entities.iter() {
                 // query.get() does a "system permission check" that will fail if the entity is from a
                 // new archetype which hasnt been "prepared yet"
-                query.get::<u32>(entity).unwrap();
+                query.get_component::<u32>(entity).unwrap();
             }
 
             assert_eq!(1, entities.iter().count());
@@ -595,7 +595,7 @@ mod tests {
             for entity in &mut entities.iter() {
                 // query.get() does a "system permission check" that will fail if the entity is from a
                 // new archetype which hasnt been "prepared yet"
-                query.get::<u32>(entity).unwrap();
+                query.get_component::<u32>(entity).unwrap();
             }
 
             assert_eq!(1, entities.iter().count());

crates/bevy_ecs/src/system/into_system.rs

@@ -437,35 +437,35 @@ mod tests {
         ) {
             let entities = entity_query.iter().collect::<Vec<Entity>>();
             assert!(
-                b_query.get::<B>(entities[0]).is_err(),
+                b_query.get_component::<B>(entities[0]).is_err(),
                 "entity 0 should not have B"
             );
             assert!(
-                b_query.get::<B>(entities[1]).is_ok(),
+                b_query.get_component::<B>(entities[1]).is_ok(),
                 "entity 1 should have B"
             );
             assert!(
-                b_query.get::<A>(entities[1]).is_err(),
+                b_query.get_component::<A>(entities[1]).is_err(),
                 "entity 1 should have A, but b_query shouldn't have access to it"
             );
             assert!(
-                b_query.get::<D>(entities[3]).is_err(),
+                b_query.get_component::<D>(entities[3]).is_err(),
                 "entity 3 should have D, but it shouldn't be accessible from b_query"
             );
             assert!(
-                b_query.get::<C>(entities[2]).is_err(),
+                b_query.get_component::<C>(entities[2]).is_err(),
                 "entity 2 has C, but it shouldn't be accessible from b_query"
             );
             assert!(
-                a_c_query.get::<C>(entities[2]).is_ok(),
+                a_c_query.get_component::<C>(entities[2]).is_ok(),
                 "entity 2 has C, and it should be accessible from a_c_query"
             );
             assert!(
-                a_c_query.get::<D>(entities[3]).is_err(),
+                a_c_query.get_component::<D>(entities[3]).is_err(),
                 "entity 3 should have D, but it shouldn't be accessible from b_query"
             );
             assert!(
-                d_query.get::<D>(entities[3]).is_ok(),
+                d_query.get_component::<D>(entities[3]).is_ok(),
                 "entity 3 should have D"
             );
 

crates/bevy_ecs/src/system/query/mod.rs

@@ -75,7 +75,7 @@ impl<'a, Q: HecsQuery> Query<'a, Q> {
     }
 
     /// Gets the query result for the given `entity`
-    pub fn entity(&self, entity: Entity) -> Result<<Q::Fetch as Fetch>::Item, QueryError>
+    pub fn get(&self, entity: Entity) -> Result<<Q::Fetch as Fetch>::Item, QueryError>
     where
         Q::Fetch: ReadOnlyFetch,
     {
@@ -88,7 +88,7 @@ impl<'a, Q: HecsQuery> Query<'a, Q> {
     }
 
     /// Gets the query result for the given `entity`
-    pub fn entity_mut(&mut self, entity: Entity) -> Result<<Q::Fetch as Fetch>::Item, QueryError> {
+    pub fn get_mut(&mut self, entity: Entity) -> Result<<Q::Fetch as Fetch>::Item, QueryError> {
         // SAFE: system runs without conflicts with other systems. same-system queries have runtime borrow checks when they conflict
         unsafe {
             self.world
@@ -111,7 +111,7 @@ impl<'a, Q: HecsQuery> Query<'a, Q> {
 
     /// Gets a reference to the entity's component of the given type. This will fail if the entity does not have
     /// the given component type or if the given component type does not match this query.
-    pub fn get<T: Component>(&self, entity: Entity) -> Result<&T, QueryError> {
+    pub fn get_component<T: Component>(&self, entity: Entity) -> Result<&T, QueryError> {
         if let Some(location) = self.world.get_entity_location(entity) {
             if self
                 .component_access
@@ -133,7 +133,10 @@ impl<'a, Q: HecsQuery> Query<'a, Q> {
 
     /// Gets a mutable reference to the entity's component of the given type. This will fail if the entity does not have
     /// the given component type or if the given component type does not match this query.
-    pub fn get_mut<T: Component>(&mut self, entity: Entity) -> Result<Mut<'_, T>, QueryError> {
+    pub fn get_component_mut<T: Component>(
+        &mut self,
+        entity: Entity,
+    ) -> Result<Mut<'_, T>, QueryError> {
         let location = match self.world.get_entity_location(entity) {
             None => return Err(QueryError::ComponentError(ComponentError::NoSuchEntity)),
             Some(location) => location,
@@ -174,7 +177,7 @@ impl<'a, Q: HecsQuery> Query<'a, Q> {
     /// Sets the entity's component to the given value. This will fail if the entity does not already have
     /// the given component type or if the given component type does not match this query.
     pub fn set<T: Component>(&mut self, entity: Entity, component: T) -> Result<(), QueryError> {
-        let mut current = self.get_mut::<T>(entity)?;
+        let mut current = self.get_component_mut::<T>(entity)?;
         *current = component;
         Ok(())
     }

crates/bevy_render/src/camera/visible_entities.rs

@@ -1,7 +1,7 @@
 use super::{Camera, DepthCalculation};
 use crate::Draw;
 use bevy_core::FloatOrd;
-use bevy_ecs::{Entity, Query};
+use bevy_ecs::{Entity, Query, With};
 use bevy_property::Properties;
 use bevy_transform::prelude::GlobalTransform;
 
@@ -26,7 +26,7 @@ impl VisibleEntities {
 pub fn visible_entities_system(
     mut camera_query: Query<(&Camera, &GlobalTransform, &mut VisibleEntities)>,
     draw_query: Query<(Entity, &Draw)>,
-    draw_transform_query: Query<(&Draw, &GlobalTransform)>,
+    draw_transform_query: Query<With<Draw, &GlobalTransform>>,
 ) {
     for (camera, camera_global_transform, mut visible_entities) in camera_query.iter_mut() {
         visible_entities.value.clear();
@@ -39,19 +39,18 @@ pub fn visible_entities_system(
                 continue;
             }
 
-            let order =
+            let order = if let Ok(global_transform) = draw_transform_query.get(entity) {
-                if let Ok(global_transform) = draw_transform_query.get::<GlobalTransform>(entity) {
+                let position = global_transform.translation;
-                    let position = global_transform.translation;
+                // smaller distances are sorted to lower indices by using the distance from the camera
-                    // smaller distances are sorted to lower indices by using the distance from the camera
+                FloatOrd(match camera.depth_calculation {
-                    FloatOrd(match camera.depth_calculation {
+                    DepthCalculation::ZDifference => camera_position.z() - position.z(),
-                        DepthCalculation::ZDifference => camera_position.z() - position.z(),
+                    DepthCalculation::Distance => (camera_position - position).length(),
-                        DepthCalculation::Distance => (camera_position - position).length(),
+                })
-                    })
+            } else {
-                } else {
+                let order = FloatOrd(no_transform_order);
-                    let order = FloatOrd(no_transform_order);
+                no_transform_order += 0.1;
-                    no_transform_order += 0.1;
+                order
-                    order
+            };
-                };
 
             if draw.is_transparent {
                 transparent_entities.push(VisibleEntity { entity, order })

crates/bevy_render/src/render_graph/nodes/camera_node.rs

@@ -78,15 +78,11 @@ pub fn camera_node_system(
 ) {
     let render_resource_context = &**render_resource_context;
 
-    let (camera, global_transform) =
+    let (camera, global_transform) = if let Some(entity) = active_cameras.get(&state.camera_name) {
-        if let Some(camera_entity) = active_cameras.get(&state.camera_name) {
+        query.get(entity).unwrap()
-            (
+    } else {
-                query.get::<Camera>(camera_entity).unwrap(),
+        return;
-                query.get::<GlobalTransform>(camera_entity).unwrap(),
+    };
-            )
-        } else {
-            return;
-        };
 
     let staging_buffer = if let Some(staging_buffer) = state.staging_buffer {
         render_resource_context.map_buffer(staging_buffer);

crates/bevy_transform/src/hierarchy/hierarchy.rs

@@ -14,7 +14,7 @@ where
 {
     let parent_result = run(state, entity, parent_result, previous_result);
     previous_result = None;
-    if let Ok(children) = children_query.entity(entity) {
+    if let Ok(children) = children_query.get(entity) {
         for child in children.iter().cloned() {
             previous_result = run_on_hierarchy(
                 children_query,

crates/bevy_transform/src/hierarchy/hierarchy_maintenance_system.rs

@@ -14,7 +14,7 @@ pub fn parent_update_system(
     // them from the `Children` of the `PreviousParent`.
     for (entity, previous_parent) in removed_parent_query.iter() {
         log::trace!("Parent was removed from {:?}", entity);
-        if let Ok(mut previous_parent_children) = children_query.entity_mut(previous_parent.0) {
+        if let Ok(mut previous_parent_children) = children_query.get_mut(previous_parent.0) {
             log::trace!(" > Removing {:?} from it's prev parent's children", entity);
             previous_parent_children.0.retain(|e| *e != entity);
             commands.remove_one::<PreviousParent>(entity);
@@ -35,9 +35,7 @@ pub fn parent_update_system(
             }
 
             // Remove from `PreviousParent.Children`.
-            if let Ok(mut previous_parent_children) =
+            if let Ok(mut previous_parent_children) = children_query.get_mut(previous_parent.0) {
-                children_query.get_mut::<Children>(previous_parent.0)
-            {
                 log::trace!(" > Removing {:?} from prev parent's children", entity);
                 (*previous_parent_children).0.retain(|e| *e != entity);
             }
@@ -52,7 +50,7 @@ pub fn parent_update_system(
         // Add to the parent's `Children` (either the real component, or
         // `children_additions`).
         log::trace!("Adding {:?} to it's new parent {:?}", entity, parent.0);
-        if let Ok(mut new_parent_children) = children_query.get_mut::<Children>(parent.0) {
+        if let Ok(mut new_parent_children) = children_query.get_mut(parent.0) {
             // This is the parent
             log::trace!(
                 " > The new parent {:?} already has a `Children`, adding to it.",

crates/bevy_transform/src/transform_propagate_system.rs

@@ -8,14 +8,20 @@ pub fn transform_propagate_system(
             With<GlobalTransform, (Option<&Children>, &Transform, &mut GlobalTransform)>,
         >,
     >,
-    mut transform_query: Query<With<Parent, (&Transform, &mut GlobalTransform, Option<&Children>)>>,
+    mut transform_query: Query<With<Parent, (&Transform, &mut GlobalTransform)>>,
+    children_query: Query<With<Parent, With<GlobalTransform, Option<&Children>>>>,
 ) {
     for (children, transform, mut global_transform) in root_query.iter_mut() {
         *global_transform = GlobalTransform::from(*transform);
 
         if let Some(children) = children {
             for child in children.0.iter() {
-                propagate_recursive(&global_transform, &mut transform_query, *child);
+                propagate_recursive(
+                    &global_transform,
+                    &mut transform_query,
+                    &children_query,
+                    *child,
+                );
             }
         }
     }
@@ -23,15 +29,14 @@ pub fn transform_propagate_system(
 
 fn propagate_recursive(
     parent: &GlobalTransform,
-    transform_query: &mut Query<
+    transform_query: &mut Query<With<Parent, (&Transform, &mut GlobalTransform)>>,
-        With<Parent, (&Transform, &mut GlobalTransform, Option<&Children>)>,
+    children_query: &Query<With<Parent, With<GlobalTransform, Option<&Children>>>>,
-    >,
     entity: Entity,
 ) {
     log::trace!("Updating Transform for {:?}", entity);
 
     let global_matrix = {
-        if let Ok((transform, mut global_transform, _)) = transform_query.entity_mut(entity) {
+        if let Ok((transform, mut global_transform)) = transform_query.get_mut(entity) {
             *global_transform = parent.mul_transform(*transform);
             *global_transform
         } else {
@@ -39,14 +44,10 @@ fn propagate_recursive(
         }
     };
 
-    // Collect children
+    if let Ok(Some(children)) = children_query.get(entity) {
-    let children = transform_query
+        for child in children.0.iter() {
-        .get::<Children>(entity)
+            propagate_recursive(&global_matrix, transform_query, children_query, *child);
-        .map(|e| e.0.iter().cloned().collect::<Vec<_>>())
+        }
-        .unwrap_or_default();
-
-    for child in children {
-        propagate_recursive(&global_matrix, transform_query, child);
     }
 }
 

crates/bevy_ui/src/focus.rs

@@ -124,7 +124,9 @@ pub fn ui_focus_system(
     if let Some(new_hovered_entity) = hovered_entity {
         if let Some(old_hovered_entity) = state.hovered_entity {
             if new_hovered_entity != old_hovered_entity {
-                if let Ok(mut interaction) = node_query.get_mut::<Interaction>(old_hovered_entity) {
+                if let Ok(mut interaction) =
+                    node_query.get_component_mut::<Interaction>(old_hovered_entity)
+                {
                     if *interaction == Interaction::Hovered {
                         *interaction = Interaction::None;
                     }

crates/bevy_ui/src/update.rs

@@ -41,7 +41,7 @@ fn update_node_entity(
     };
     let global_z = z + parent_global_z;
 
-    if let Ok(mut transform) = node_query.get_mut::<Transform>(entity) {
+    if let Ok(mut transform) = node_query.get_component_mut::<Transform>(entity) {
         transform.translation.set_z(z);
     }
 

crates/bevy_ui/src/widget/text.rs

@@ -38,7 +38,7 @@ pub fn text_system(
     // add queued text to atlases
     let mut new_queued_text = Vec::new();
     for entity in queued_text.entities.drain(..) {
-        if let Ok((text, mut calculated_size)) = queries.q1_mut().entity_mut(entity) {
+        if let Ok((text, mut calculated_size)) = queries.q1_mut().get_mut(entity) {
             let font_atlases = font_atlas_sets
                 .get_or_insert_with(text.font.id, || FontAtlasSet::new(text.font.clone_weak()));
             // TODO: this call results in one or more TextureAtlases, whose render resources are created in the RENDER_GRAPH_SYSTEMS

examples/3d/z_sort_debug.rs

@@ -32,9 +32,7 @@ fn camera_order_color_system(
 ) {
     for (_camera, visible_entities) in camera_query.iter() {
         for visible_entity in visible_entities.iter() {
-            if let Ok(material_handle) =
+            if let Ok(material_handle) = material_query.get(visible_entity.entity) {
-                material_query.get::<Handle<StandardMaterial>>(visible_entity.entity)
-            {
                 let material = materials.get_mut(&*material_handle).unwrap();
                 let value = 1.0 - (visible_entity.order.0 - 10.0) / 7.0;
                 material.albedo = Color::rgb(value, value, value);

examples/ecs/hierarchy.rs

@@ -96,14 +96,14 @@ fn rotate(
 ) {
     let angle = std::f32::consts::PI / 2.0;
     for (parent, mut children, _) in parents_query.iter_mut() {
-        if let Ok(mut transform) = transform_query.entity_mut(parent) {
+        if let Ok(mut transform) = transform_query.get_mut(parent) {
             transform.rotate(Quat::from_rotation_z(-angle * time.delta_seconds));
         }
 
         // To iterate through the entities children, just treat the Children component as a Vec
         // Alternatively, you could query entities that have a Parent component
         for child in children.iter() {
-            if let Ok(mut transform) = transform_query.entity_mut(*child) {
+            if let Ok(mut transform) = transform_query.get_mut(*child) {
                 transform.rotate(Quat::from_rotation_z(angle * 2.0 * time.delta_seconds));
             }
         }

examples/ui/button.rs

@@ -38,7 +38,7 @@ fn button_system(
     mut text_query: Query<&mut Text>,
 ) {
     for (_button, interaction, mut material, children) in interaction_query.iter_mut() {
-        let mut text = text_query.get_mut::<Text>(children[0]).unwrap();
+        let mut text = text_query.get_mut(children[0]).unwrap();
         match *interaction {
             Interaction::Clicked => {
                 text.value = "Press".to_string();