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use crate::*;
#[derive(Clone, Debug)]
pub struct Light {
pub id: Option<String>,
pub name: Option<String>,
pub asset: Option<Box<Asset>>,
pub kind: LightKind,
pub technique: Vec<Technique>,
pub extra: Vec<Extra>,
}
impl HasId for Light {
fn id(&self) -> Option<&str> {
self.id.as_deref()
}
}
impl XNode for Light {
const NAME: &'static str = "light";
fn parse(element: &Element) -> Result<Self> {
debug_assert_eq!(element.name(), Self::NAME);
let mut it = element.children().peekable();
Ok(Light {
id: element.attr("id").map(Into::into),
name: element.attr("name").map(Into::into),
asset: Asset::parse_opt_box(&mut it)?,
kind: parse_one(Technique::COMMON, &mut it, |e| {
let mut it = e.children().peekable();
finish(parse_one_many(&mut it, LightKind::parse)?, it)
})?,
technique: Technique::parse_list(&mut it)?,
extra: Extra::parse_many(it)?,
})
}
}
#[derive(Clone, Debug)]
pub enum LightKind {
Ambient(AmbientLight),
Directional(DirectionalLight),
Point(Box<PointLight>),
Spot(Box<SpotLight>),
}
impl LightKind {
pub fn parse(e: &Element) -> Result<Option<Self>> {
Ok(Some(match e.name() {
AmbientLight::NAME => Self::Ambient(AmbientLight::parse(e)?),
DirectionalLight::NAME => Self::Directional(DirectionalLight::parse(e)?),
PointLight::NAME => Self::Point(PointLight::parse_box(e)?),
SpotLight::NAME => Self::Spot(SpotLight::parse_box(e)?),
_ => return Ok(None),
}))
}
}
#[derive(Clone, Debug)]
pub struct AmbientLight {
pub color: Box<[f32; 3]>,
}
impl XNode for AmbientLight {
const NAME: &'static str = "ambient";
fn parse(element: &Element) -> Result<Self> {
debug_assert_eq!(element.name(), Self::NAME);
let mut it = element.children().peekable();
let color = parse_one("color", &mut it, parse_array_n)?;
finish(AmbientLight { color }, it)
}
}
#[derive(Clone, Debug)]
pub struct DirectionalLight {
pub color: Box<[f32; 3]>,
}
impl XNode for DirectionalLight {
const NAME: &'static str = "directional";
fn parse(element: &Element) -> Result<Self> {
debug_assert_eq!(element.name(), Self::NAME);
let mut it = element.children().peekable();
let color = parse_one("color", &mut it, parse_array_n)?;
finish(DirectionalLight { color }, it)
}
}
#[derive(Clone, Debug)]
pub struct PointLight {
pub color: Box<[f32; 3]>,
pub constant_attenuation: f32,
pub linear_attenuation: f32,
pub quadratic_attenuation: f32,
}
impl XNode for PointLight {
const NAME: &'static str = "point";
fn parse(element: &Element) -> Result<Self> {
debug_assert_eq!(element.name(), Self::NAME);
let mut it = element.children().peekable();
let res = PointLight {
color: parse_one("color", &mut it, parse_array_n)?,
constant_attenuation: parse_opt("constant_attenuation", &mut it, parse_elem)?
.unwrap_or(0.),
linear_attenuation: parse_opt("linear_attenuation", &mut it, parse_elem)?.unwrap_or(0.),
quadratic_attenuation: parse_opt("quadratic_attenuation", &mut it, parse_elem)?
.unwrap_or(0.),
};
finish(res, it)
}
}
#[derive(Clone, Debug)]
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,
}
impl XNode for SpotLight {
const NAME: &'static str = "spot";
fn parse(element: &Element) -> Result<Self> {
debug_assert_eq!(element.name(), Self::NAME);
let mut it = element.children().peekable();
let res = SpotLight {
color: parse_one("color", &mut it, parse_array_n)?,
constant_attenuation: parse_opt("constant_attenuation", &mut it, parse_elem)?
.unwrap_or(0.),
linear_attenuation: parse_opt("linear_attenuation", &mut it, parse_elem)?.unwrap_or(0.),
quadratic_attenuation: parse_opt("quadratic_attenuation", &mut it, parse_elem)?
.unwrap_or(0.),
falloff_angle: parse_opt("falloff_angle", &mut it, parse_elem)?.unwrap_or(180.),
falloff_exponent: parse_opt("falloff_exponent", &mut it, parse_elem)?.unwrap_or(0.),
};
finish(res, it)
}
}