pub struct TransformHelper<'w, 's> { /* private fields */ }
Expand description

System parameter for computing up-to-date GlobalTransforms.

Computing an entity’s GlobalTransform can be expensive so it is recommended you use the GlobalTransform component stored on the entity, unless you need a GlobalTransform that reflects the changes made to any Transforms since the last time the transform propagation systems ran.

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impl<'w, 's> TransformHelper<'w, 's>

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pub fn compute_global_transform( &self, entity: Entity ) -> Result<GlobalTransform, ComputeGlobalTransformError>

Computes the GlobalTransform of the given entity from the Transform component on it and its ancestors.

Trait Implementations§

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impl SystemParam for TransformHelper<'_, '_>

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type State = FetchState

Used to store data which persists across invocations of a system.
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type Item<'w, 's> = TransformHelper<'w, 's>

The item type returned when constructing this system param. The value of this associated type should be Self, instantiated with new lifetimes. Read more
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fn init_state( world: &mut World, system_meta: &mut SystemMeta ) -> <TransformHelper<'_, '_> as SystemParam>::State

Registers any World access used by this SystemParam and creates a new instance of this param’s State.
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fn new_archetype( state: &mut <TransformHelper<'_, '_> as SystemParam>::State, archetype: &Archetype, system_meta: &mut SystemMeta )

For the specified Archetype, registers the components accessed by this SystemParam (if applicable).
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fn apply( state: &mut <TransformHelper<'_, '_> as SystemParam>::State, system_meta: &SystemMeta, world: &mut World )

Applies any deferred mutations stored in this SystemParam’s state. This is used to apply Commands during apply_deferred.
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unsafe fn get_param<'w, 's>( state: &'s mut <TransformHelper<'_, '_> as SystemParam>::State, system_meta: &SystemMeta, world: UnsafeWorldCell<'w>, change_tick: Tick ) -> <TransformHelper<'_, '_> as SystemParam>::Item<'w, 's>

Creates a parameter to be passed into a SystemParamFunction. Read more
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impl<'w, 's> ReadOnlySystemParam for TransformHelper<'w, 's>
where Query<'w, 's, &'static Parent>: ReadOnlySystemParam, Query<'w, 's, &'static Transform>: ReadOnlySystemParam,

Auto Trait Implementations§

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impl<'w, 's> !RefUnwindSafe for TransformHelper<'w, 's>

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impl<'w, 's> Send for TransformHelper<'w, 's>

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impl<'w, 's> Sync for TransformHelper<'w, 's>

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impl<'w, 's> Unpin for TransformHelper<'w, 's>

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impl<'w, 's> !UnwindSafe for TransformHelper<'w, 's>

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T, U> AsBindGroupShaderType<U> for T
where U: ShaderType, &'a T: for<'a> Into<U>,

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fn as_bind_group_shader_type(&self, _images: &RenderAssets<Image>) -> U

Return the T ShaderType for self. When used in AsBindGroup derives, it is safe to assume that all images in self exist.
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> Downcast<T> for T

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fn downcast(&self) -> &T

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impl<T> Downcast for T
where T: Any,

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Convert Box<dyn Trait> (where Trait: Downcast) to Box<dyn Any>. Box<dyn Any> can then be further downcast into Box<ConcreteType> where ConcreteType implements Trait.
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fn into_any_rc(self: Rc<T>) -> Rc<dyn Any>

Convert Rc<Trait> (where Trait: Downcast) to Rc<Any>. Rc<Any> can then be further downcast into Rc<ConcreteType> where ConcreteType implements Trait.
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fn as_any(&self) -> &(dyn Any + 'static)

Convert &Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &Any’s vtable from &Trait’s.
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fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Convert &mut Trait (where Trait: Downcast) to &Any. This is needed since Rust cannot generate &mut Any’s vtable from &mut Trait’s.
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impl<T> DowncastSync for T
where T: Any + Send + Sync,

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Convert Arc<Trait> (where Trait: Downcast) to Arc<Any>. Arc<Any> can then be further downcast into Arc<ConcreteType> where ConcreteType implements Trait.
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<S> FromSample<S> for S

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fn from_sample_(s: S) -> S

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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where U: Into<T>,

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Performs the conversion.
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where U: TryFrom<T>,

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The type returned in the event of a conversion error.
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Performs the conversion.
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where S: Into<Dispatch>,

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