76 lines
2.3 KiB
Rust
76 lines
2.3 KiB
Rust
use crate::core::light::{CreateLight, lookup_spectrum};
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use crate::core::spectrum::spectrum_to_photometric;
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use crate::core::texture::FloatTexture;
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use crate::utils::{Arena, FileLoc, ParameterDictionary};
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use shared::core::geometry::Point3f;
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use shared::core::light::{Light, LightBase, LightType};
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use shared::core::medium::{Medium, MediumInterface};
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use shared::core::shape::Shape;
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use shared::core::spectrum::Spectrum;
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use shared::core::texture::SpectrumType;
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use shared::lights::PointLight;
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use shared::spectra::RGBColorSpace;
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use shared::utils::Transform;
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use shared::{Float, PI};
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use std::fmt::Error;
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pub trait CreatePointLight {
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fn new(
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render_from_light: Transform,
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medium_interface: MediumInterface,
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le: Spectrum,
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scale: Float,
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) -> Self;
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}
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impl CreatePointLight for PointLight {
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fn new(
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render_from_light: Transform,
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medium_interface: MediumInterface,
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le: Spectrum,
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scale: Float,
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) -> Self {
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let base = LightBase::new(
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LightType::DeltaPosition,
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render_from_light,
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medium_interface,
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);
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let i = Ptr::from(lookup_spectrum(&le));
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Self { base, scale, i }
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}
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}
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impl CreateLight for PointLight {
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fn create(
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_arena: &mut Arena,
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render_from_light: Transform,
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medium: Medium,
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parameters: &ParameterDictionary,
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_loc: &FileLoc,
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_shape: &Shape,
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_alpha: &FloatTexture,
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colorspace: Option<&RGBColorSpace>,
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) -> Result<Light, Error> {
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let l = parameters
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.get_one_spectrum(
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"L",
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Some(Spectrum::Dense(colorspace.unwrap().illuminant)),
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SpectrumType::Illuminant,
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)
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.unwrap();
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let mut scale = parameters.get_one_float("scale", 1.);
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scale /= spectrum_to_photometric(l);
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let phi_v = parameters.get_one_float("power", 1.);
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if phi_v > 0. {
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let k_e = 4. * PI;
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scale *= phi_v / k_e;
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}
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let from = parameters.get_one_point3f("from", Point3f::zero());
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let tf = Transform::translate(from.into());
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let final_render = render_from_light * tf;
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let specific = PointLight::new(final_render, medium.into(), l, scale);
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Ok(Light::Point(specific))
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}
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}
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