Struct Viewport 

pub struct Viewport {
    pub physical_position: UVec2,
    pub physical_size: UVec2,
    pub depth: Range<f32>,
}

Render viewport configuration for the Camera component.

The viewport defines the area on the render target to which the camera renders its image. You can overlay multiple cameras in a single window using viewports to create effects like split screen, minimaps, and character viewers.

Fields

physical_position: UVec2

The physical position to render this viewport to within the RenderTarget of this Camera. (0,0) corresponds to the top-left corner

physical_size: UVec2

The physical size of the viewport rectangle to render to within the RenderTarget of this Camera. The origin of the rectangle is in the top-left corner.

depth: Range<f32>

The minimum and maximum depth to render (on a scale from 0.0 to 1.0).

Implementations

impl Viewport

pub fn clamp_to_size(&mut self, size: UVec2)

Cut the viewport rectangle so that it lies inside a rectangle of the given size.

If either of the viewport’s position coordinates lies outside the given dimensions, it will be moved just inside first. If either of the given dimensions is zero, the position and size of the viewport rectangle will both be set to zero in that dimension.

pub fn from_viewport_and_override( viewport: Option<&Viewport>, main_pass_resolution_override: Option<&MainPassResolutionOverride>, ) -> Option<Viewport>

Examples found in repository

examples/shader_advanced/custom_render_phase.rs (line 618)

    fn run<'w>(
        &self,
        graph: &mut RenderGraphContext,
        render_context: &mut RenderContext<'w>,
        (camera, view, target, resolution_override): QueryItem<'w, '_, Self::ViewQuery>,
        world: &'w World,
    ) -> Result<(), NodeRunError> {
        // First, we need to get our phases resource
        let Some(stencil_phases) = world.get_resource::<ViewSortedRenderPhases<Stencil3d>>() else {
            return Ok(());
        };

        // Get the view entity from the graph
        let view_entity = graph.view_entity();

        // Get the phase for the current view running our node
        let Some(stencil_phase) = stencil_phases.get(&view.retained_view_entity) else {
            return Ok(());
        };

        // Render pass setup
        let mut render_pass = render_context.begin_tracked_render_pass(RenderPassDescriptor {
            label: Some("stencil pass"),
            // For the purpose of the example, we will write directly to the view target. A real
            // stencil pass would write to a custom texture and that texture would be used in later
            // passes to render custom effects using it.
            color_attachments: &[Some(target.get_color_attachment())],
            // We don't bind any depth buffer for this pass
            depth_stencil_attachment: None,
            timestamp_writes: None,
            occlusion_query_set: None,
        });

        if let Some(viewport) =
            Viewport::from_viewport_and_override(camera.viewport.as_ref(), resolution_override)
        {
            render_pass.set_camera_viewport(&viewport);
        }

        // Render the phase
        // This will execute each draw functions of each phase items queued in this phase
        if let Err(err) = stencil_phase.render(&mut render_pass, world, view_entity) {
            error!("Error encountered while rendering the stencil phase {err:?}");
        }

        Ok(())
    }

Trait Implementations

impl Clone for Viewport

fn clone(&self) -> Viewport

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Viewport

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

Formats the value using the given formatter.

impl Default for Viewport

fn default() -> Viewport

Returns the “default value” for a type.

impl FromArg for Viewport

type This<'from_arg> = Viewport

The type to convert into.

fn from_arg(arg: Arg<'_>) -> Result<<Viewport as FromArg>::This<'_>, ArgError>

Creates an item from an argument.

impl FromReflect for Viewport

fn from_reflect(reflect: &(dyn PartialReflect + 'static)) -> Option<Viewport>

Constructs a concrete instance of Self from a reflected value.

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

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

impl GetOwnership for Viewport

fn ownership() -> Ownership

Returns the ownership of Self.

impl GetTypeRegistration for Viewport

fn get_type_registration() -> TypeRegistration

Returns the default TypeRegistration for this type.

fn register_type_dependencies(registry: &mut TypeRegistry)

Registers other types needed by this type.

impl IntoReturn for Viewport

fn into_return<'into_return>(self) -> Return<'into_return>

where Viewport: 'into_return,

Converts Self into a Return value.

impl PartialReflect for Viewport

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

Returns the TypeInfo of the type represented by this value.

fn try_apply( &mut self, value: &(dyn PartialReflect + 'static), ) -> Result<(), ApplyError>

Tries to apply 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<Viewport>) -> ReflectOwned

Returns an owned enumeration of “kinds” of type.

fn try_into_reflect( self: Box<Viewport>, ) -> Result<Box<dyn Reflect>, Box<dyn PartialReflect>>

Attempts to cast this type to a boxed, fully-reflected value.

fn try_as_reflect(&self) -> Option<&(dyn Reflect + 'static)>

Attempts to cast this type to a fully-reflected value.

fn try_as_reflect_mut(&mut self) -> Option<&mut (dyn Reflect + 'static)>

Attempts to cast this type to a mutable, fully-reflected value.

fn into_partial_reflect(self: Box<Viewport>) -> Box<dyn PartialReflect>

Casts this type to a boxed, reflected value.

fn as_partial_reflect(&self) -> &(dyn PartialReflect + 'static)

Casts this type to a reflected value.

fn as_partial_reflect_mut(&mut self) -> &mut (dyn PartialReflect + 'static)

Casts this type to a mutable, reflected value.

fn reflect_partial_eq( &self, value: &(dyn PartialReflect + 'static), ) -> Option<bool>

Returns a “partial equality” comparison result.

fn reflect_clone(&self) -> Result<Box<dyn Reflect>, ReflectCloneError>

Attempts to clone Self using reflection.

fn apply(&mut self, value: &(dyn PartialReflect + 'static))

Applies a reflected value to this value.

fn to_dynamic(&self) -> Box<dyn PartialReflect>

Converts this reflected value into its dynamic representation based on its kind.

fn reflect_clone_and_take<T>(&self) -> Result<T, ReflectCloneError>

where T: 'static, Self: Sized + TypePath,

For a type implementing PartialReflect, combines reflect_clone and take in a useful fashion, automatically constructing an appropriate ReflectCloneError if the downcast fails.

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 is_dynamic(&self) -> bool

Indicates whether or not this type is a dynamic type.

impl Reflect for Viewport

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

Returns the value as a Box<dyn Any>.

fn as_any(&self) -> &(dyn Any + 'static)

Returns the value as a &dyn Any.

fn as_any_mut(&mut self) -> &mut (dyn Any + 'static)

Returns the value as a &mut dyn Any.

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

Casts this type to a boxed, fully-reflected value.

fn as_reflect(&self) -> &(dyn Reflect + 'static)

Casts this type to a fully-reflected value.

fn as_reflect_mut(&mut self) -> &mut (dyn Reflect + 'static)

Casts this type to a mutable, fully-reflected value.

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

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

impl Struct for Viewport

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

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

fn field_mut( &mut self, name: &str, ) -> Option<&mut (dyn PartialReflect + 'static)>

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

fn field_at(&self, index: usize) -> Option<&(dyn PartialReflect + 'static)>

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

fn field_at_mut( &mut self, index: usize, ) -> Option<&mut (dyn PartialReflect + 'static)>

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

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 to_dynamic_struct(&self) -> DynamicStruct

Creates a new DynamicStruct from this struct.

fn get_represented_struct_info(&self) -> Option<&'static StructInfo>

Will return None if TypeInfo is not available.

impl TypePath for Viewport

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 Viewport

fn type_info() -> &'static TypeInfo

Returns the compile-time info for the underlying type.