Struct Light 

pub struct Light {
    pub direction: Vec3I16,
    pub colour: (i16, i16, i16),
}

A single directional light in some reference frame (caller’s choice of world / object / eye space).

Fields

direction: Vec3I16

Direction FROM the surface TOWARD the light source. Q3.12 unit vector; if you computed a “light-to-surface” direction instead, negate it before storing here.

colour: (i16, i16, i16)

Per-channel intensity in Q3.12 (0x1000 = full intensity, 0x0800 = half, 0x2000 = double / over-bright). The GTE clamps out-of-range values at the MAC stage.

Implementations

impl Light

pub const OFF: Self

Null light – contributes nothing. Use as a filler for unused slots in a rig.

pub const fn warm_white_at(direction: Vec3I16) -> Self

Convenience constructor for a “warm-white at 75%” feel – useful while prototyping light rigs.

pub const fn cool_fill_at(direction: Vec3I16) -> Self

“Cool fill” preset – bluish, dimmer, useful as a secondary / rim light.

Trait Implementations

impl Clone for Light

fn clone(&self) -> Light

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Light

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

Formats the value using the given formatter.

impl Copy for Light