@babylonjs/viewer/dist/chunks/gltf-ext-unlit-DqjbpQHw.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 { a8 as _registerPbrExt } from './index-DMbDahsc.esm.js';

const PBR2_HAS_UNLIT = 1 << 8;
function createUnlitFragment(hasIbl) {
  const assign = `color = baseColor * material.unlitColor;`;
  return {
    _id: "unlit",
    _dependencies: hasIbl ? ["ibl"] : void 0,
    _uboFields: [
      { _name: "unlitColor", _type: "vec3<f32>" },
      { _name: "_unlitColorPad", _type: "f32" }
    ],
    _fragmentSlots: hasIbl ? { AI: assign } : { NI: assign }
  };
}
function writeUnlitUBO(data, material, offsets) {
  if (!material._unlit || !offsets.has("unlitColor")) {
    return;
  }
  const off = offsets.get("unlitColor") / 4;
  const tint = material._unlitColor ?? [1, 1, 1];
  data[off] = tint[0];
  data[off + 1] = tint[1];
  data[off + 2] = tint[2];
}
const pbrExt = {
  id: "unlit",
  phase: "fragment",
  detect(mat) {
    return mat._unlit ? { f: 0, f2: PBR2_HAS_UNLIT } : { f: 0, f2: 0 };
  },
  frag(ctx) {
    if (!(ctx._features2 & PBR2_HAS_UNLIT)) {
      return null;
    }
    return createUnlitFragment(ctx._hasIbl);
  },
  writeUbo: writeUnlitUBO
};

function setPbrUnlit(mat, unlitColor) {
  mat._unlit = true;
  if (unlitColor) {
    mat._unlitColor = unlitColor;
  }
  _registerPbrExt(pbrExt);
}

const ext = {
  id: "KHR_materials_unlit",
  async applyMaterial(mat) {
    if (!mat._rawMatDef?.extensions?.KHR_materials_unlit) {
      return null;
    }
    const f = mat._baseColorFactor;
    const tint = mat._baseColorImage ? [f[0], f[1], f[2]] : void 0;
    const out = {};
    setPbrUnlit(out, tint);
    return out;
  }
};

export { ext as default };
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