utils extractContourData.ts

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  import { PolyDataClipCacheType } from '../../../helpers/clipAndCacheSurfacesForViewport';
import { RawContourData } from '../contourComputationStrategies';
 
/**
 * Extracts contour data from the given polyDataCache.
 * @param polyDataCache - The polyData cache containing intersection information.
 * @param segmentIndexMap - Optional map for mapping surface IDs to segment indices.
 * @returns A map of segment indices to an array of contour results.
 */
export function extractContourData(
  polyDataCache: PolyDataClipCacheType,
  segmentIndexMap?: Map<string, number>
) {
  const rawResults = new Map() as RawContourData;
 
  for (const [cacheId, intersectionInfo] of polyDataCache) {
    // Todo; fix this
    const surfaceId = cacheId.split('_')[1];
 
    for (const [_, result] of intersectionInfo) {
      if (!result) {
        continue;
      }
      const segmentIndex = Number(surfaceId) || segmentIndexMap?.get(surfaceId);
 
      if (!segmentIndex) {
        continue;
      }
 
      if (!rawResults.has(segmentIndex)) {
        rawResults.set(segmentIndex, []);
      }
 
      rawResults.get(segmentIndex).push(result);
    }
  }
  return rawResults;
}