parse method

@override dynamic parse(dynamic json, [ String? path, Function? onLoad, Function? onError, ])

Implementation

@override
parse(json, [String? path, Function? onLoad, Function? onError]) {
  // Remove empty lines and comments
  // str = str
  // 	.replace( /^#.*?(\n|\r)/gm, '' )
  // 	.replace( /^\s*?(\n|\r)/gm, '' )
  // 	.trim();

  final reg = RegExp(r"^#.*?(\n|\r)", multiLine: true);
  json = json.replaceAll(reg, "");

  final reg2 = RegExp(r"^\s*?(\n|\r)", multiLine: true);
  json = json.replaceAll(reg2, "");
  json = json.trim();

  var title;
  int size = 0;
  var domainMin = Vector3(0, 0, 0);
  var domainMax = Vector3(1, 1, 1);

  final reg3 = RegExp(r"[\n\r]+");
  var lines = json.split(reg3);
  Uint8Array? data;

  var currIndex = 0;
  for (var i = 0, l = lines.length; i < l; i++) {
    var line = lines[i].trim();
    var split = line.split(RegExp(r"\s"));

    switch (split[0]) {
      case 'TITLE':
        title = line.substring(7, line.length - 1);
        break;
      case 'LUT_3D_SIZE':
        // TODO: A .CUBE LUT file specifies floating point values and could be represented with
        // more precision than can be captured with Uint8Array.
        var sizeToken = split[1];
        size = parseFloat(sizeToken).toInt();
        data = Uint8Array(size * size * size * 4);
        break;
      case 'DOMAIN_MIN':
        domainMin.x = parseFloat(split[1]);
        domainMin.y = parseFloat(split[2]);
        domainMin.z = parseFloat(split[3]);
        break;
      case 'DOMAIN_MAX':
        domainMax.x = parseFloat(split[1]);
        domainMax.y = parseFloat(split[2]);
        domainMax.z = parseFloat(split[3]);
        break;
      default:
        var r = parseFloat(split[0]);
        var g = parseFloat(split[1]);
        var b = parseFloat(split[2]);

        if (r > 1.0 || r < 0.0 || g > 1.0 || g < 0.0 || b > 1.0 || b < 0.0) {
          throw ('LUTCubeLoader : Non normalized values not supported.');
        }

        data![currIndex + 0] = (r * 255).toInt();
        data[currIndex + 1] = (g * 255).toInt();
        data[currIndex + 2] = (b * 255).toInt();
        data[currIndex + 3] = 255;
        currIndex += 4;
    }
  }

  var texture = DataTexture(null, null, null, null, null, null, null, null, null, null, null, null);
  texture.image!.data = data;
  texture.image!.width = size;
  texture.image!.height = size * size;
  texture.type = UnsignedByteType;
  texture.magFilter = LinearFilter;
  texture.wrapS = ClampToEdgeWrapping;
  texture.wrapT = ClampToEdgeWrapping;
  texture.generateMipmaps = false;

  var texture3D = Data3DTexture();
  texture3D.image!.data = data;
  texture3D.image!.width = size;
  texture3D.image!.height = size;
  texture3D.image!.depth = size;
  texture3D.type = UnsignedByteType;
  texture3D.magFilter = LinearFilter;
  texture3D.wrapS = ClampToEdgeWrapping;
  texture3D.wrapT = ClampToEdgeWrapping;
  texture3D.wrapR = ClampToEdgeWrapping;
  texture3D.generateMipmaps = false;

  return {
    "title": title,
    "size": size,
    "domainMin": domainMin,
    "domainMax": domainMax,
    "texture": texture,
    "texture3D": texture3D,
  };
}