Enum LateralType 

pub enum LateralType {
    TypeI,
    TypeII,
    TypeIII,
    TypeIV,
    TypeV,
}

IESNA lateral light distribution type.

Classifies how light is spread laterally (perpendicular to the road axis). Based on the width of the half-maximum isocandela trace on the C90-C270 plane.

Variants

TypeI

Type I: Narrow symmetric distribution, for walkways and narrow paths. Peak intensity near C0/C180, half-max width < 15° from road axis.

TypeII

Type II: Slightly wider than Type I, for narrower roadways. Half-max width 15°–25° from road axis.

TypeIII

Type III: Asymmetric, throws light to one side. Half-max extends 25°–40° from road axis.

TypeIV

Type IV: Semi-cutoff forward throw. Half-max extends 40°–55° from road axis, minimal backlight.

TypeV

Type V: Symmetric circular distribution (area lighting). Approximately equal intensity in all lateral directions.

Trait Implementations

impl Clone for LateralType

fn clone(&self) -> LateralType

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for LateralType

impl Debug for LateralType

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

Formats the value using the given formatter.

impl Display for LateralType

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

Formats the value using the given formatter.

impl Eq for LateralType

impl PartialEq for LateralType

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for LateralType