Struct bevy_pbr::LightProbe

pub struct LightProbe;

A marker component for a light probe, which is a cuboid region that provides global illumination to all fragments inside it.

The light probe range is conceptually a unit cube (1×1×1) centered on the origin. The bevy_transform::prelude::Transform applied to this entity can scale, rotate, or translate that cube so that it contains all fragments that should take this light probe into account.

Note that a light probe will have no effect unless the entity contains some kind of illumination, which can either be an EnvironmentMapLight or an IrradianceVolume.

When multiple sources of indirect illumination can be applied to a fragment, the highest-quality one is chosen. Diffuse and specular illumination are considered separately, so, for example, Bevy may decide to sample the diffuse illumination from an irradiance volume and the specular illumination from a reflection probe. From highest priority to lowest priority, the ranking is as follows:

Rank	Diffuse	Specular
1	Lightmap	Lightmap
2	Irradiance volume	Reflection probe
3	Reflection probe	View environment map
4	View environment map

Note that ambient light is always added to the diffuse component and does not participate in the ranking. That is, ambient light is applied in addition to, not instead of, the light sources above.

A terminology note: Unfortunately, there is little agreement across game and graphics engines as to what to call the various techniques that Bevy groups under the term light probe. In Bevy, a light probe is the generic term that encompasses both reflection probes and irradiance volumes. In object-oriented terms, light probe is the superclass, and reflection probe and irradiance volume are subclasses. In other engines, you may see the term light probe refer to an irradiance volume with a single voxel, or perhaps some other technique, while in Bevy light probe refers not to a specific technique but rather to a class of techniques. Developers familiar with other engines should be aware of this terminology difference.

Implementations

impl LightProbe

pub fn new() -> Self

Creates a new light probe component.

Trait Implementations

impl Clone for LightProbe

fn clone(&self) -> LightProbe

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Component for LightProbe

where Self: Send + Sync + 'static,

type Storage = TableStorage

A marker type indicating the storage type used for this component. This must be either TableStorage or SparseStorage.

impl Debug for LightProbe

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for LightProbe

fn default() -> LightProbe

Returns the “default value” for a type.

impl FromReflect for LightProbe

where Self: Any + Send + Sync,

fn from_reflect(reflect: &dyn Reflect) -> Option<Self>

Constructs a concrete instance of Self from a reflected value.

fn take_from_reflect( reflect: Box<dyn Reflect> ) -> Result<Self, Box<dyn Reflect>>

Attempts to downcast the given value to Self using, constructing the value using from_reflect if that fails.

impl GetTypeRegistration for LightProbe

where Self: Any + Send + Sync,

fn get_type_registration() -> TypeRegistration

impl Reflect for LightProbe

where Self: Any + Send + Sync,

fn get_represented_type_info(&self) -> Option<&'static TypeInfo>

Returns the TypeInfo of the type represented by this value.

fn into_any(self: Box<Self>) -> Box<dyn Any>

Returns the value as a Box<dyn Any>.

fn as_any(&self) -> &dyn Any

Returns the value as a &dyn Any.

fn as_any_mut(&mut self) -> &mut dyn Any

Returns the value as a &mut dyn Any.

fn into_reflect(self: Box<Self>) -> Box<dyn Reflect>

Casts this type to a boxed reflected value.

fn as_reflect(&self) -> &dyn Reflect

Casts this type to a reflected value.

fn as_reflect_mut(&mut self) -> &mut dyn Reflect

Casts this type to a mutable reflected value.

fn clone_value(&self) -> Box<dyn Reflect>

Clones the value as a Reflect trait object.

fn set(&mut self, value: Box<dyn Reflect>) -> Result<(), Box<dyn Reflect>>

Performs a type-checked assignment of a reflected value to this value.

fn apply(&mut self, value: &dyn Reflect)

Applies a reflected value to this value.

fn reflect_kind(&self) -> ReflectKind

Returns a zero-sized enumeration of “kinds” of type.

fn reflect_ref(&self) -> ReflectRef<'_>

Returns an immutable enumeration of “kinds” of type.

fn reflect_mut(&mut self) -> ReflectMut<'_>

Returns a mutable enumeration of “kinds” of type.

fn reflect_owned(self: Box<Self>) -> ReflectOwned

Returns an owned enumeration of “kinds” of type.

fn reflect_partial_eq(&self, value: &dyn Reflect) -> Option<bool>

Returns a “partial equality” comparison result.

fn reflect_hash(&self) -> Option<u64>

Returns a hash of the value (which includes the type).

fn debug(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Debug formatter for the value.

fn serializable(&self) -> Option<Serializable<'_>>

Returns a serializable version of the value.

fn is_dynamic(&self) -> bool

Indicates whether or not this type is a dynamic type.

impl Struct for LightProbe

where Self: Any + Send + Sync,

fn field(&self, name: &str) -> Option<&dyn Reflect>

Returns a reference to the value of the field named name as a &dyn Reflect.

fn field_mut(&mut self, name: &str) -> Option<&mut dyn Reflect>

Returns a mutable reference to the value of the field named name as a &mut dyn Reflect.

fn field_at(&self, index: usize) -> Option<&dyn Reflect>

Returns a reference to the value of the field with index index as a &dyn Reflect.

fn field_at_mut(&mut self, index: usize) -> Option<&mut dyn Reflect>

Returns a mutable reference to the value of the field with index index as a &mut dyn Reflect.

fn name_at(&self, index: usize) -> Option<&str>

Returns the name of the field with index index.

fn field_len(&self) -> usize

Returns the number of fields in the struct.

fn iter_fields(&self) -> FieldIter<'_>

Returns an iterator over the values of the reflectable fields for this struct.

fn clone_dynamic(&self) -> DynamicStruct

Clones the struct into a DynamicStruct.

impl TypePath for LightProbe

where Self: Any + Send + Sync,

fn type_path() -> &'static str

Returns the fully qualified path of the underlying type.

fn short_type_path() -> &'static str

Returns a short, pretty-print enabled path to the type.

fn type_ident() -> Option<&'static str>

Returns the name of the type, or None if it is anonymous.

fn crate_name() -> Option<&'static str>

Returns the name of the crate the type is in, or None if it is anonymous.

fn module_path() -> Option<&'static str>

Returns the path to the module the type is in, or None if it is anonymous.

impl Typed for LightProbe

where Self: Any + Send + Sync,

fn type_info() -> &'static TypeInfo

Returns the compile-time info for the underlying type.

impl Copy for LightProbe