@babylonjs/viewer/dist/chunks/enable-material-uv-transform-Bfrq4EoX.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 { y as PBR2_HAS_UV_TRANSFORM, a8 as _registerPbrExt } from './index-DMbDahsc.esm.js';

const PBR2_OCCL_UV_SPLIT = 1 << 28;
function writeOne(data, offsets, texName, tex) {
  const mOff = offsets.get(`${texName}UVm`);
  const tOff = offsets.get(`${texName}UVt`);
  if (mOff === void 0 || tOff === void 0) {
    return;
  }
  const mi = mOff / 4;
  const ti = tOff / 4;
  const sx = tex?.uScale ?? 1;
  const sy = tex?.vScale ?? 1;
  const ang = tex?.uAng ?? 0;
  const ox = tex?.uOffset ?? 0;
  const oy = tex?.vOffset ?? 0;
  if (ang === 0) {
    data[mi] = sx;
    data[mi + 1] = 0;
    data[mi + 2] = 0;
    data[mi + 3] = sy;
  } else {
    const c = Math.cos(ang);
    const s = Math.sin(ang);
    data[mi] = c * sx;
    data[mi + 1] = s * sy;
    data[mi + 2] = -s * sx;
    data[mi + 3] = c * sy;
  }
  data[ti] = ox;
  data[ti + 1] = oy;
  data[ti + 2] = 0;
  data[ti + 3] = 0;
}
const pbrExt = {
  id: "uv-transform",
  phase: "fragment",
  detect(mat) {
    const m = mat;
    const split = !!m.occlusionTexture && !m.occlusionTexCoord;
    return { f: 0, f2: (m._hasUvTx ? PBR2_HAS_UV_TRANSFORM : 0) | (split ? PBR2_OCCL_UV_SPLIT : 0) };
  },
  writeUbo(data, material, offsets) {
    const m = material;
    writeOne(data, offsets, "baseColor", m.baseColorTexture);
    writeOne(data, offsets, "normal", m.normalTexture);
    writeOne(data, offsets, "orm", m.ormTexture);
    writeOne(data, offsets, "emissive", m.emissiveTexture);
    writeOne(data, offsets, "specGloss", m.specGlossTexture);
    writeOne(data, offsets, "occl", m.occlusionTexture);
  }
};

function enableMaterialUvTransform(material) {
  material._hasUvTx = true;
  _registerPbrExt(pbrExt);
  return material._renderFeatures === void 0;
}

export { enableMaterialUvTransform };
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