pub struct ReflectHandle { /* private fields */ }
Expand description
Reflect type data struct relating a Handle<T>
back to the T
asset type.
Say you want to look up the asset values of a list of handles when you have access to their &dyn Reflect
form.
Assets can be looked up in the world using ReflectAsset
, but how do you determine which ReflectAsset
to use when
only looking at the handle? ReflectHandle
is stored in the type registry on each Handle<T>
type, so you can use ReflectHandle::asset_type_id
to look up
the ReflectAsset
type data on the corresponding T
asset type:
use bevy_asset::{ReflectHandle, ReflectAsset};
let handles: Vec<&dyn Reflect> = unimplemented!();
for handle in handles {
let reflect_handle = type_registry.get_type_data::<ReflectHandle>(handle.type_id()).unwrap();
let reflect_asset = type_registry.get_type_data::<ReflectAsset>(reflect_handle.asset_type_id()).unwrap();
let handle = reflect_handle.downcast_handle_untyped(handle.as_any()).unwrap();
let value = reflect_asset.get(world, &handle).unwrap();
println!("{value:?}");
}
Implementations§
Source§impl ReflectHandle
impl ReflectHandle
Sourcepub fn asset_type_id(&self) -> TypeId
pub fn asset_type_id(&self) -> TypeId
The TypeId
of the asset
Sourcepub fn downcast_handle_untyped(
&self,
handle: &(dyn Any + 'static),
) -> Option<UntypedHandle>
pub fn downcast_handle_untyped( &self, handle: &(dyn Any + 'static), ) -> Option<UntypedHandle>
A way to go from a Handle<T>
in a dyn Any
to a UntypedHandle
Sourcepub fn typed(&self, handle: UntypedHandle) -> Box<dyn Reflect>
pub fn typed(&self, handle: UntypedHandle) -> Box<dyn Reflect>
A way to go from a UntypedHandle
to a Handle<T>
in a Box<dyn Reflect>
.
Equivalent of UntypedHandle::typed
.
Trait Implementations§
Source§impl Clone for ReflectHandle
impl Clone for ReflectHandle
Source§fn clone(&self) -> ReflectHandle
fn clone(&self) -> ReflectHandle
Returns a duplicate of the value. Read more
1.0.0 · Source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source
. Read moreSource§impl<A> FromType<Handle<A>> for ReflectHandlewhere
A: Asset,
impl<A> FromType<Handle<A>> for ReflectHandlewhere
A: Asset,
Source§fn from_type() -> ReflectHandle
fn from_type() -> ReflectHandle
Creates an instance of
Self
for type T
.Auto Trait Implementations§
impl Freeze for ReflectHandle
impl RefUnwindSafe for ReflectHandle
impl Send for ReflectHandle
impl Sync for ReflectHandle
impl Unpin for ReflectHandle
impl UnwindSafe for ReflectHandle
Blanket Implementations§
Source§impl<T, U> AsBindGroupShaderType<U> for T
impl<T, U> AsBindGroupShaderType<U> for T
Source§fn as_bind_group_shader_type(&self, _images: &RenderAssets<GpuImage>) -> U
fn as_bind_group_shader_type(&self, _images: &RenderAssets<GpuImage>) -> U
Return the
T
ShaderType
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. When used in AsBindGroup
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) to Box<dyn Any>
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fn as_any(&self) -> &(dyn Any + 'static)
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. This is needed since Rust cannot
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impl<T> DowncastSend for T
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impl<T> DowncastSync for T
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