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Material

roxlap_render

Struct Material 

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pub struct Material {
    pub alpha: u8,
    pub mode: BlendMode,
    pub emissive: u8,
}
Expand description

One material: an opacity and a blend mode, indexed out of a MaterialTable by a per-voxel material id.

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§alpha: u8

Opacity for BlendMode::AlphaBlend / intensity scale for BlendMode::Additive; ignored for BlendMode::Opaque. 0 = fully transparent, 255 = fully opaque / full intensity.

§mode: BlendMode

How the voxel composites with what is behind it.

§emissive: u8

Self-emission (EV stage): 0 = a normal lit voxel; anything greater renders the voxel at albedo × ((128 + (emissive >> 1)) / 128) — from ~1.0× up to ~2.0× over-bright at 255 — skipping the baked brightness byte, per-face side shades, the dynamic light rig, shadows and cel bands (fog still applies). Orthogonal to mode: an BlendMode::AlphaBlend crystal can glow through its own translucency. Emission onto surrounding voxels is separate — that is the lightmode-2 point-light bake (BakeMode::PointLights in roxlap-scene), not this field.

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impl Material

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pub const OPAQUE: Material

The reserved, fully-opaque material at table id 0 — the back-compat default for every voxel without explicit material data.

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pub fn alpha_blend(alpha: u8) -> Material

An BlendMode::AlphaBlend material with opacity alpha.

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pub fn additive(alpha: u8) -> Material

An BlendMode::Additive glow material scaled by alpha.

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pub fn glow(emissive: u8) -> Material

An opaque emissive material (EV stage): renders at albedo × ((128 + (emissive >> 1)) / 128) regardless of baked lighting, side shades, the dynamic rig or shadows. Combine with a translucent mode via with_emissive (e.g. Material::alpha_blend(160).with_emissive(255) for a glowing crystal).

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pub fn with_emissive(self, emissive: u8) -> Material

This material with its emissive set — the builder for translucent glowing materials.

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pub fn volumetric(alpha: u8) -> Material

A BlendMode::Volumetric (Beer–Lambert) material whose alpha is the per-voxel-unit absorption — opacity accrues with the ray’s path length through filled volumes (smoke/fog/murky water).

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pub fn is_opaque(self) -> bool

True for BlendMode::Opaque — the first-hit, fully-occluding path.

Trait Implementations§

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impl Clone for Material

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fn clone(&self) -> Material

Returns a duplicate 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 Copy for Material

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impl Debug for Material

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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 Material

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fn default() -> Material

Returns the “default value” for a type. Read more
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impl Eq for Material

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impl PartialEq for Material

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

Equality operator ==. Read more
1.0.0 (const: unstable) · Source§

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

Inequality operator !=. Read more
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impl StructuralPartialEq for Material

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Gets the TypeId of self. Read more
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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
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