Function parsePoints3DText

src/parsers/points3d.ts:72–130

(text: string)

 * 63390 1.67241 0.292931 0.609726 115 121 122 1.33927 16 6542 15 7345 6 6714 14 7227
 */
export function parsePoints3DText(text: string): Map<bigint, Point3D> {
  const points = new Map<bigint, Point3D>();
  const lines = text.split('\n');

  for (const line of lines) {
    // Skip comments and empty lines
    if (line.startsWith('#') || line.trim() === '') continue;

    const parts = line.trim().split(/\s+/);
    if (parts.length < 8) continue;

    const point3DId = parseColmapBigIntToken(parts[0]);
    const xyzValues = parseColmapNumberTokens(parts.slice(1, 4));
    const red = parseColmapIntegerToken(parts[4], { min: 0, max: 255 });
    const green = parseColmapIntegerToken(parts[5], { min: 0, max: 255 });
    const blue = parseColmapIntegerToken(parts[6], { min: 0, max: 255 });
    const error = parseColmapNumberToken(parts[7]);

    if (
      point3DId === null ||
      xyzValues === null ||
      red === null ||
      green === null ||
      blue === null ||
      error === null
    ) {
      continue;
    }

    const xyz: [number, number, number] = [
      xyzValues[0],
      xyzValues[1],
      xyzValues[2],
    ];
    const rgb: [number, number, number] = [
      red,
      green,
      blue,
    ];

    // Parse track elements (pairs of IMAGE_ID, POINT2D_IDX)
    const track: TrackElement[] = [];
    for (let i = 8; i + 1 < parts.length; i += 2) {
      const imageId = parseColmapIntegerToken(parts[i], { min: 0 });
      const point2DIdx = parseColmapIntegerToken(parts[i + 1], { min: 0 });

      if (imageId === null || point2DIdx === null) continue;

      track.push({
        imageId,
        point2DIdx,
      });
    }

    points.set(point3DId, { point3DId, xyz, rgb, error, track });
  }

  return points;