Struct Volume 

pub struct Volume {
    pub thickness: f32,
    pub thickness_texture: Option<TextureRef>,
    pub attenuation_distance: Option<f32>,
    pub attenuation_color: [f32; 3],
}

KHR_materials_volume parameters: turns the surface from an infinitely thin wall into the boundary of a homogeneous absorbing medium. Light travelling through the medium is attenuated towards attenuation_color over attenuation_distance. Requires a manifold mesh and is typically paired with a non-zero Transmission / MaterialExt::ior.

Fields

thickness: f32

Thickness of the volume beneath the surface in the mesh’s coordinate space (thicknessFactor). Default 0.0 — thin-walled, i.e. the extension has no effect until thickness is positive. Multiplied by the green channel of thickness_texture.

thickness_texture: Option<TextureRef>

Thickness texture (thicknessTexture), G channel.

attenuation_distance: Option<f32>

Average distance light travels in the medium before interacting with a particle, in world space (attenuationDistance). The spec default is +Infinity (no absorption); represented here as None so the special “infinite” case stays distinct from a finite distance. See effective_attenuation_distance.

attenuation_color: [f32; 3]

Colour white light turns into after travelling attenuation_distance through the medium (attenuationColor), linear RGB. Default [1,1,1] (no tint).

Implementations

impl Volume

pub fn effective_attenuation_distance(&self) -> f32

The effective attenuation distance — the stored value when finite, else f32::INFINITY (the spec default).

Trait Implementations

impl Clone for Volume

fn clone(&self) -> Volume

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Volume

impl Debug for Volume

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

Formats the value using the given formatter.

impl Default for Volume

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for Volume

fn eq(&self, other: &Volume) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Volume