Function parseMtl

src/webgl/loading.js:484–526

* @private

(mtlPath)

   * @private
   */
  async function parseMtl(mtlPath) {
    let currentMaterial = null;
    let materials = {};

    const { data } = await request(mtlPath, 'text');
    const lines = data.split('\n');

    for (let line = 0; line < lines.length; ++line) {
      const tokens = lines[line].trim().split(/\s+/);
      if (tokens[0] === 'newmtl') {
        const materialName = tokens[1];
        currentMaterial = materialName;
        materials[currentMaterial] = {};
      } else if (tokens[0] === 'Kd') {
        //Diffuse color
        materials[currentMaterial].diffuseColor = [
          parseFloat(tokens[1]),
          parseFloat(tokens[2]),
          parseFloat(tokens[3])
        ];
      } else if (tokens[0] === 'Ka') {
        //Ambient Color
        materials[currentMaterial].ambientColor = [
          parseFloat(tokens[1]),
          parseFloat(tokens[2]),
          parseFloat(tokens[3])
        ];
      } else if (tokens[0] === 'Ks') {
        //Specular color
        materials[currentMaterial].specularColor = [
          parseFloat(tokens[1]),
          parseFloat(tokens[2]),
          parseFloat(tokens[3])
        ];

      } else if (tokens[0] === 'map_Kd') {
        //Texture path
        materials[currentMaterial].texturePath = tokens[1];
      }
    }

    return materials;
  }

  /**
   * @private