@babylonjs/viewer/dist/chunks/set-dispersion-C-gxf8Ms.esm.js

The Babylon Viewer aims to simplify a specific but common Babylon.js use case: loading, viewing, and interacting with a 3D model.

import { r as registerPbrTransmission, _ as _setDispersionSampleWgsl } from './pbr-transmission-ext-BGf7DpJB.esm.js';
import { br as _registerPbrSceneHook } from './index-DMbDahsc.esm.js';
import './generate-mipmaps-BpLaf4fV.esm.js';

const DISPERSION_SAMPLE_WGSL = `let eta=material.refractionParams.y;
let realIOR=1.0/eta;
let spread=0.04*material.volumeParams.w*(realIOR-1.0);
let etaR=1.0/(realIOR-spread);
let etaB=1.0/(realIOR+spread);
let cpR=scene.viewProjection*vec4<f32>(input.worldPos+refract(-V,N,etaR)*th,1.0);
let cpG=scene.viewProjection*vec4<f32>(input.worldPos+refract(-V,N,eta)*th,1.0);
let cpB=scene.viewProjection*vec4<f32>(input.worldPos+refract(-V,N,etaB)*th,1.0);
let uvR=(cpR.xy/cpR.w)*vec2<f32>(0.5,-0.5)+vec2<f32>(0.5,0.5);
let uvG=(cpG.xy/cpG.w)*vec2<f32>(0.5,-0.5)+vec2<f32>(0.5,0.5);
let uvB=(cpB.xy/cpB.w)*vec2<f32>(0.5,-0.5)+vec2<f32>(0.5,0.5);
let er=vec3<f32>(textureSampleLevel(refractionTexture,refractionSampler_,uvR,lv).r,textureSampleLevel(refractionTexture,refractionSampler_,uvG,lv).g,textureSampleLevel(refractionTexture,refractionSampler_,uvB,lv).b)*material.environmentIntensity;`;

function setPbrDispersion(mat, dispersion) {
  ((mat._subsurface ??= {}).refraction ??= {}).dispersion = dispersion;
  _setDispersionSampleWgsl(DISPERSION_SAMPLE_WGSL);
  _registerPbrSceneHook(registerPbrTransmission);
}

export { setPbrDispersion };
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