Enum BlendMode 

#[repr(u8)]
pub enum BlendMode {
    Opaque = 0,
    AlphaBlend = 1,
    Additive = 2,
    Volumetric = 3,
}

How a voxel’s colour combines with what is already behind it along a ray.

Variants

Opaque = 0

Fully opaque: the first solid hit wins and occludes everything behind it — the existing render path. A voxel’s alpha is ignored.

AlphaBlend = 1

Front-to-back over compositing; alpha is the voxel’s opacity. Glass, smoke, water.

Additive = 2

Commutative additive glow: contributes alpha·colour to the pixel without occluding what is behind it (order-independent). Spells, fire, magic auras, muzzle flashes.

Volumetric = 3

Thickness-aware Beer–Lambert absorption for filled volumes (true smoke, fog, murky water). Unlike [AlphaBlend] (which composites one alpha per surface run, so opacity is independent of thickness — ideal for shells/glass), Volumetric weights each voxel’s opacity by the ray’s path length through it: the per-cell effective opacity is 1 − (1 − alpha)^seg_len where seg_len is the traversed length in voxel units. A boundary sliver contributes ≈0 (no voxel-grid dicing) while opacity grows smoothly with depth. Occludes like AlphaBlend.

Implementations

impl BlendMode

pub fn from_u8(v: u8) -> Option<Self>

Decode the on-wire u8. Returns None for an unknown discriminant.

pub fn as_u8(self) -> u8

The on-wire discriminant.

Trait Implementations

impl Clone for BlendMode

fn clone(&self) -> BlendMode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for BlendMode

impl Debug for BlendMode

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

Formats the value using the given formatter.

impl Default for BlendMode

fn default() -> BlendMode

Returns the “default value” for a type.

impl Eq for BlendMode

impl PartialEq for BlendMode

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for BlendMode