TypeScript base.VolumeChunkSpecification類代碼示例

 return this.scales.map(scaleInfo => {
   return Array
       .from(VolumeChunkSpecification.getDefaults({
         voxelSize: scaleInfo.resolution,
         dataType: this.dataType,
         numChannels: this.numChannels,
         lowerVoxelBound: scaleInfo.voxelOffset,
         upperVoxelBound: vec3.add(vec3.create(), scaleInfo.voxelOffset, scaleInfo.size),
         volumeType: this.volumeType,
         chunkDataSizes: scaleInfo.chunkSizes,
         compressedSegmentationBlockSize: scaleInfo.compressedSegmentationBlockSize
       }))
       .map(spec => {
         let path = `${this.path}/${scaleInfo.key}`;
         let cacheKey = stableStringify({
           'spec': spec,
           'baseUrls': this.baseUrls,
           'path': path,
           'encoding': scaleInfo.encoding
         });
         return chunkManager.getChunkSource(
             VolumeChunkSource, cacheKey,
             () => new VolumeChunkSource(
                 chunkManager, spec, this.baseUrls, path, scaleInfo.encoding));
       });
 });

 return this.scales.map(levelScales => levelScales.map(scaleInfo => {
   const spec = VolumeChunkSpecification.withDefaultCompression({
     voxelSize: scaleInfo.voxelSize,
     dataType,
     volumeType,
     numChannels,
     chunkLayoutOffset: scaleInfo.offset,
     upperVoxelBound: scaleInfo.sizeInVoxels,
     upperClipBound: upperClipBound,
     chunkDataSize: scaleInfo.chunkDataSize!,
   });
   return VolumeChunkSource.get(
       chunkManager, spec, {baseUrls: this.baseUrls, key: scaleInfo.key, encoding: encoding});
 }));

 getSources(volumeSourceOptions: VolumeSourceOptions) {
   let {info} = this;
   const spec = VolumeChunkSpecification.withDefaultCompression({
     volumeType: info.volumeType,
     chunkDataSize: info.volumeSize,
     dataType: info.dataType,
     voxelSize: info.voxelSize,
     numChannels: info.numChannels,
     upperVoxelBound: info.volumeSize,
     transform: translationRotationScaleZReflectionToMat4(
         mat4.create(), info.qoffset, info.quatern, kOneVec, info.qfac),
     volumeSourceOptions,
   });
   return [[VolumeChunkSource.get(this.chunkManager, spec, {url: this.url})]];
 }

 return this.scales.map(levelScales => levelScales.map(scaleInfo => {
   const spec = VolumeChunkSpecification.withDefaultCompression({
     voxelSize: scaleInfo.voxelSize,
     dataType,
     volumeType,
     numChannels,
     transform: mat4.fromTranslation(mat4.create(), scaleInfo.offset),
     upperVoxelBound: scaleInfo.sizeInVoxels,
     upperClipBound: upperClipBound,
     chunkDataSize: scaleInfo.chunkDataSize!, volumeSourceOptions,
   });
   return VolumeChunkSource.get(
       this.chunkManager, spec,
       {baseUrls: this.baseUrls, key: scaleInfo.key, encoding: encoding});
 }));

 getSources(chunkManager: ChunkManager) {
   let sources: VolumeChunkSource[][] = [];
   const {response, volumeType} = this;
   const datasetObject = response['dataset'];
   const encoding = volumeType === VolumeType.IMAGE ? 'jpeg' : 'npz';
   for (let resolution of Object.keys(datasetObject['neariso_imagesize'])) {
     let imageSize = parseIntVec(vec3.create(), datasetObject['neariso_imagesize'][resolution]);
     let voxelSize = parseFiniteVec(vec3.create(), datasetObject['neariso_voxelres'][resolution]);
     let alternatives: VolumeChunkSource[] = [];
     sources.push(alternatives);
     // The returned offset for downsampled resolutions can have non-integer components.  It
     // appears that the true offset is obtained by rounding up.
     let origLowerVoxelBound =
         parseFiniteVec(vec3.create(), datasetObject['neariso_offset'][resolution]);
     let lowerVoxelBound = vec3.create();
     let upperVoxelBound = vec3.create();
     for (let i = 0; i < 3; ++i) {
       let origLower = origLowerVoxelBound[i];
       lowerVoxelBound[i] = Math.ceil(origLower);
       upperVoxelBound[i] = Math.floor(origLower + imageSize[i]);
     }
     for (let spec of VolumeChunkSpecification.getDefaults({
            volumeType,
            voxelSize,
            dataType: this.dataType, lowerVoxelBound, upperVoxelBound
          })) {
       let cacheKey = stableStringify(
           {'spec': spec, key: this.key, channel: this.channel, resolution: resolution});
       alternatives.push(chunkManager.getChunkSource(
           VolumeChunkSource, cacheKey,
           () => new VolumeChunkSource(
               chunkManager, spec, this.hostnames, this.key, this.channel, resolution, encoding)));
     }
   }
   return sources;
 }

 static get(chunkManager: ChunkManager, spec: VolumeChunkSpecification, parameters: Parameters) {
   return chunkManager.getChunkSource(
       this, stableStringify({parameters, spec: spec.toObject()}),
       () => new this(chunkManager, spec, parameters));
 }