Function RebuildClusters

mapcluster.c:934–1188

rebuild the clusters according to the current extent */

/* rebuild the clusters according to the current extent */
int RebuildClusters(layerObj *layer, int isQuery)
{
    mapObj* map;
	layerObj* srcLayer;
    double distance, maxDistanceX, maxDistanceY, cellSizeX, cellSizeY;
    rectObj searchrect;
    int status;
    clusterInfo* current;
    int depth;
#ifdef USE_CLUSTER_EXTERNAL
    int layerIndex;
#endif

    msClusterLayerInfo* layerinfo = layer->layerinfo;

    if (!layerinfo)
    {
        msSetError(MS_MISCERR, "Layer is not open: %s", layer->name);
        return MS_FAILURE;
    }
    
    if (!layer->map)
    {
        msSetError(MS_MISCERR, "No map associated with this layer: %s", layer->name);
        return MS_FAILURE;
    }

	map = layer->map;

    layerinfo->current = layerinfo->finalized; /* restart */

    /* identify the current extent */
    if(layer->transform == MS_TRUE)
        searchrect = map->extent;
    else 
    {
        searchrect.minx = searchrect.miny = 0;
        searchrect.maxx = map->width-1;
        searchrect.maxy = map->height-1;
    }

    if (searchrect.minx == layerinfo->searchRect.minx &&
        searchrect.miny == layerinfo->searchRect.miny &&
        searchrect.maxx == layerinfo->searchRect.maxx &&
        searchrect.maxy == layerinfo->searchRect.maxy)
    {
        /* already built */
        return MS_SUCCESS;
    }

    /* destroy previous data*/
    clusterDestroyData(layerinfo);

    layerinfo->searchRect = searchrect;

   /* reproject the rectangle to layer coordinates */
#ifdef USE_PROJ
  if((map->projection.numargs > 0) && (layer->projection.numargs > 0))