Struct bevy::prelude::DirectionalLight

pub struct DirectionalLight {
    pub color: Color,
    pub illuminance: f32,
    pub shadows_enabled: bool,
    pub shadow_depth_bias: f32,
    pub shadow_normal_bias: f32,
}
Expand description

A Directional light.

Directional lights don’t exist in reality but they are a good approximation for light sources VERY far away, like the sun or the moon.

The light shines along the forward direction of the entity’s transform. With a default transform this would be along the negative-Z axis.

Valid values for illuminance are:

Illuminance (lux)Surfaces illuminated by
0.0001Moonless, overcast night sky (starlight)
0.002Moonless clear night sky with airglow
0.05–0.3Full moon on a clear night
3.4Dark limit of civil twilight under a clear sky
20–50Public areas with dark surroundings
50Family living room lights
80Office building hallway/toilet lighting
100Very dark overcast day
150Train station platforms
320–500Office lighting
400Sunrise or sunset on a clear day.
1000Overcast day; typical TV studio lighting
10,000–25,000Full daylight (not direct sun)
32,000–100,000Direct sunlight

Source: Wikipedia

§Shadows

To enable shadows, set the shadows_enabled property to true.

Shadows are produced via cascaded shadow maps.

To modify the cascade set up, such as the number of cascades or the maximum shadow distance, change the CascadeShadowConfig component of the DirectionalLightBundle.

To control the resolution of the shadow maps, use the DirectionalLightShadowMap resource:

App::new()
    .insert_resource(DirectionalLightShadowMap { size: 2048 });

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§color: Color§illuminance: f32

Illuminance in lux (lumens per square meter), representing the amount of light projected onto surfaces by this light source. Lux is used here instead of lumens because a directional light illuminates all surfaces more-or-less the same way (depending on the angle of incidence). Lumens can only be specified for light sources which emit light from a specific area.

§shadows_enabled: bool§shadow_depth_bias: f32§shadow_normal_bias: f32

A bias applied along the direction of the fragment’s surface normal. It is scaled to the shadow map’s texel size so that it is automatically adjusted to the orthographic projection.

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impl DirectionalLight

pub const DEFAULT_SHADOW_DEPTH_BIAS: f32 = 0.0199999996f32

pub const DEFAULT_SHADOW_NORMAL_BIAS: f32 = 1.79999995f32

Trait Implementations§

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impl Clone for DirectionalLight

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fn clone(&self) -> DirectionalLight

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Component for DirectionalLight
where DirectionalLight: Send + Sync + 'static,

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const STORAGE_TYPE: StorageType = bevy_ecs::component::StorageType::Table

A constant indicating the storage type used for this component.
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fn register_component_hooks(_hooks: &mut ComponentHooks)

Called when registering this component, allowing mutable access to its ComponentHooks.
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impl Debug for DirectionalLight

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

Formats the value using the given formatter. Read more
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impl Default for DirectionalLight

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fn default() -> DirectionalLight

Returns the “default value” for a type. Read more
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impl FromReflect for DirectionalLight
where DirectionalLight: Any + Send + Sync, Color: FromReflect + TypePath + RegisterForReflection, f32: FromReflect + TypePath + RegisterForReflection, bool: FromReflect + TypePath + RegisterForReflection,

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fn from_reflect(reflect: &(dyn Reflect + 'static)) -> Option<DirectionalLight>

Constructs a concrete instance of Self from a reflected value.
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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. Read more
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impl GetTypeRegistration for DirectionalLight
where DirectionalLight: Any + Send + Sync, Color: FromReflect + TypePath + RegisterForReflection, f32: FromReflect + TypePath + RegisterForReflection, bool: FromReflect + TypePath + RegisterForReflection,

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fn get_type_registration() -> TypeRegistration

Returns the default TypeRegistration for this type.
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fn register_type_dependencies(registry: &mut TypeRegistry)

Registers other types needed by this type. Read more
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impl Reflect for DirectionalLight
where DirectionalLight: Any + Send + Sync, Color: FromReflect + TypePath + RegisterForReflection, f32: FromReflect + TypePath + RegisterForReflection, bool: FromReflect + TypePath + RegisterForReflection,

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

Returns the TypeInfo of the type represented by this value. Read more
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fn into_any(self: Box<DirectionalLight>) -> Box<dyn Any>

Returns the value as a Box<dyn Any>.
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fn as_any(&self) -> &(dyn Any + 'static)

Returns the value as a &dyn Any.
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fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Returns the value as a &mut dyn Any.
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fn into_reflect(self: Box<DirectionalLight>) -> Box<dyn Reflect>

Casts this type to a boxed reflected value.
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fn as_reflect(&self) -> &(dyn Reflect + 'static)

Casts this type to a reflected value.
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fn as_reflect_mut(&mut self) -> &mut (dyn Reflect + 'static)

Casts this type to a mutable reflected value.
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fn clone_value(&self) -> Box<dyn Reflect>

Clones the value as a Reflect trait object. Read more
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fn set(&mut self, value: Box<dyn Reflect>) -> Result<(), Box<dyn Reflect>>

Performs a type-checked assignment of a reflected value to this value. Read more
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fn try_apply( &mut self, value: &(dyn Reflect + 'static) ) -> Result<(), ApplyError>

Tries to apply a reflected value to this value. Read more
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fn reflect_kind(&self) -> ReflectKind

Returns a zero-sized enumeration of “kinds” of type. Read more
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fn reflect_ref(&self) -> ReflectRef<'_>

Returns an immutable enumeration of “kinds” of type. Read more
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fn reflect_mut(&mut self) -> ReflectMut<'_>

Returns a mutable enumeration of “kinds” of type. Read more
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fn reflect_owned(self: Box<DirectionalLight>) -> ReflectOwned

Returns an owned enumeration of “kinds” of type. Read more
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fn reflect_partial_eq(&self, value: &(dyn Reflect + 'static)) -> Option<bool>

Returns a “partial equality” comparison result. Read more
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fn apply(&mut self, value: &(dyn Reflect + 'static))

Applies a reflected value to this value. Read more
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fn reflect_hash(&self) -> Option<u64>

Returns a hash of the value (which includes the type). Read more
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fn debug(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Debug formatter for the value. Read more
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fn serializable(&self) -> Option<Serializable<'_>>

Returns a serializable version of the value. Read more
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fn is_dynamic(&self) -> bool

Indicates whether or not this type is a dynamic type. Read more
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impl Struct for DirectionalLight
where DirectionalLight: Any + Send + Sync, Color: FromReflect + TypePath + RegisterForReflection, f32: FromReflect + TypePath + RegisterForReflection, bool: FromReflect + TypePath + RegisterForReflection,

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

Returns a reference to the value of the field named name as a &dyn Reflect.
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Returns a mutable reference to the value of the field named name as a &mut dyn Reflect.
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fn field_at(&self, index: usize) -> Option<&(dyn Reflect + 'static)>

Returns a reference to the value of the field with index index as a &dyn Reflect.
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fn field_at_mut(&mut self, index: usize) -> Option<&mut (dyn Reflect + 'static)>

Returns a mutable reference to the value of the field with index index as a &mut dyn Reflect.
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Returns the name of the field with index index.
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Returns the number of fields in the struct.
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Returns an iterator over the values of the reflectable fields for this struct.
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fn clone_dynamic(&self) -> DynamicStruct

Clones the struct into a DynamicStruct.
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impl TypePath for DirectionalLight

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Returns the fully qualified path of the underlying type. Read more
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fn short_type_path() -> &'static str

Returns a short, pretty-print enabled path to the type. Read more
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Returns the name of the type, or None if it is anonymous. Read more
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Returns the name of the crate the type is in, or None if it is anonymous. Read more
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fn module_path() -> Option<&'static str>

Returns the path to the module the type is in, or None if it is anonymous. Read more
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impl Typed for DirectionalLight
where DirectionalLight: Any + Send + Sync, Color: FromReflect + TypePath + RegisterForReflection, f32: FromReflect + TypePath + RegisterForReflection, bool: FromReflect + TypePath + RegisterForReflection,

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fn type_info() -> &'static TypeInfo

Returns the compile-time info for the underlying type.

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