Struct dae_parser::SpotLight

pub struct SpotLight {
    pub color: Box<[f32; 3]>,
    pub constant_attenuation: f32,
    pub linear_attenuation: f32,
    pub quadratic_attenuation: f32,
    pub falloff_angle: f32,
    pub falloff_exponent: f32,
}

Describes a spot light source.

The light’s default direction vector in local coordinates is [0,0,-1], pointing down the negative z axis. The actual direction of the light is defined by the transform of the node where the light is instantiated.

The constant_attenuation, linear_attenuation, and quadratic_attenuation are used to calculate the total attenuation of this light given a distance. The equation used is:

A = constant_attenuation + Dist * linear_attenuation + Dist^2 * quadratic_attenuation

The falloff_angle and falloff_exponent are used to specify the amount of attenuation based on the direction of the light.

Fields

color: Box<[f32; 3]>

Contains three floating-point numbers specifying the color of the light.

constant_attenuation: f32

The constant term in the attentuation equation, see SpotLight.

linear_attenuation: f32

The linear term in the attentuation equation, see SpotLight.

quadratic_attenuation: f32

The quadratic term in the attentuation equation, see SpotLight.

falloff_angle: f32

The directional attenuation of the light.

falloff_exponent: f32

A term in the directional attenuation equation of the light.

Trait Implementations

impl Clone for SpotLight

fn clone(&self) -> SpotLight

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for SpotLight

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

Formats the value using the given formatter.

impl XNode for SpotLight

const NAME: &'static str

The name of the XML element.

fn parse(element: &Element) -> Result<Self, Error>

Parse an XML element into this type. In most cases, the parser will require with a debug_assert that the element to parse has name Self::NAME.

fn parse_box(element: &Element) -> Result<Box<Self>, Error>

Parse an XML element and return the data structure in a Box. This can be faster in some cases when the data structure is large.

fn parse_one<'a>(
    it: &mut impl Iterator<Item = &'a Element>
) -> Result<Self, Error>

Parse a single required element from the given element iterator.

fn parse_opt(it: &mut Peekable<Children<'_>>) -> Result<Option<Self>, Error>

Parse an optional element from the given element iterator, using Self::NAME to determine if it is the correct type.

fn parse_opt_box(
    it: &mut Peekable<Children<'_>>
) -> Result<Option<Box<Self>>, Error>

Parse an optional boxed element from the given element iterator, using Self::NAME to determine if it is the correct type.

fn parse_list(it: &mut Peekable<Children<'_>>) -> Result<Vec<Self>, Error>

Parse a list of elements from the given element iterator, as long as it continues yielding elements of name Self::NAME.

fn parse_list_n<const N: usize>(
    it: &mut Peekable<Children<'_>>
) -> Result<Vec<Self>, Error>

Parse a list of elements from the given element iterator, as long as it continues yielding elements of name Self::NAME, and assert that the resulting list has length at least N.