Function decodeCameraStateLegacy

src/utils/urlCameraStateCodec.ts:121–151

(data: string)

 * Format: camera=px,py,pz,tx,ty,tz,qx,qy,qz,qw
 */
export function decodeCameraStateLegacy(data: string): CameraViewState | null {
  const values = data.split(',').map(v => parseFiniteNumberString(v));
  if (values.length !== 10 || values.some(value => value === null)) return null;

  const [px, py, pz, tx, ty, tz, qx, qy, qz, qw] = values as [
    number,
    number,
    number,
    number,
    number,
    number,
    number,
    number,
    number,
    number,
  ];

  const quatLength = Math.sqrt(qx * qx + qy * qy + qz * qz + qw * qw);
  if (quatLength < 0.9 || quatLength > 1.1) return null;

  return {
    position: [px, py, pz],
    target: [tx, ty, tz],
    quaternion: [qx, qy, qz, qw],
    distance: Math.sqrt(
      (px - tx) * (px - tx) +
      (py - ty) * (py - ty) +
      (pz - tz) * (pz - tz)
    ),
  };
}