GLTFMaterialsSpecularExtension constructor

GLTFMaterialsSpecularExtension(dynamic parser)

Implementation

GLTFMaterialsSpecularExtension(parser) {
  this.parser = parser;
  this.name = EXTENSIONS["KHR_MATERIALS_SPECULAR"]!;

  this.getMaterialType = (materialIndex) {
    var parser = this.parser;
    var materialDef = parser.json["materials"][materialIndex];

    if (materialDef["extensions"] == null ||
        materialDef["extensions"][this.name] == null) return null;

    return MeshPhysicalMaterial;
  };

  this.extendMaterialParams = (materialIndex, materialParams) async {
    var parser = this.parser;
    var materialDef = parser.json["materials"][materialIndex];

    if (materialDef["extensions"] == null ||
        materialDef["extensions"][this.name] == null) {
      return null;
    }

    List<Future> pending = [];

    var extension = materialDef["extensions"][this.name];

    materialParams.specularIntensity =
        extension.specularFactor != null ? extension.specularFactor : 1.0;

    if (extension.specularTexture != null) {
      pending.add(parser.assignTexture(
          materialParams, 'specularIntensityMap', extension.specularTexture));
    }

    var colorArray = extension.specularColorFactor ?? [1, 1, 1];
    materialParams.specularColor =
        new Color(colorArray[0], colorArray[1], colorArray[2]);

    if (extension.specularColorTexture != null) {
      var texture = await parser.assignTexture(
          materialParams, 'specularColorMap', extension.specularColorTexture, sRGBEncoding);
      pending.add(texture);
    }

    return await Future.wait(pending);
  };
}