/**
* main entry
*
* Input
* 1: the reference points to construct the kd-tree (d x n double matrix)
* 2: the query points (d x nq double matrix)
* 3: the option struct
* Output
* 1: the nearest neighbor index matrix (k x nq int32 matrix)
* 2: the distance matrix (k x nq double matrix)
* Here,
* d - the point dimension
* n - the number of reference points
* nq - the number of query points
* k - the number of maximum neighbors for each point
* Note,
* The responsibility of checking the validity of the input arguments
* is with the invoker. The annsearch.m does the checking.
* The mex-function in itself does not conduct the checking again.
*/
void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
{
// take inputs
const mxArray *mxRefPts = prhs[0];
const mxArray *mxQuery = prhs[1];
const mxArray *mxOpts = prhs[2];
// parse options
AnnBuildOptions opts_build;
AnnSearchOptions opts_search;
parse_tree_building_options(mxOpts, opts_build);
parse_search_options(mxOpts, opts_search);
// construct the tree
int d = 0;
int n = 0;
ANNpointArray pts = createPointArray(mxRefPts, d, n);
ANNkd_tree *kd_tree = createKdTree(d, n, pts, opts_build);
// perform the search
mxArray *mxInds = NULL;
mxArray *mxDists = NULL;
performAnnkSearch(kd_tree, mxQuery, opts_search, mxInds, mxDists);
// release the kd-tree
delete kd_tree;
annDeallocPts(pts);
annClose();
// set outputs
plhs[0] = mxInds;
plhs[1] = mxDists;
}
// cd L:\ann_mwrapper; Untitled2
void mexFunction(int nlhs, mxArray *plhs[], int nrhs, const mxArray *prhs[])
{
mwSize dims[3];
char command[1024];
int strlen = mxGetN(prhs[0]);
strlen = strlen < mxGetM(prhs[0]) ? mxGetN(prhs[0]) : strlen;
strlen += 1;
mxGetString (prhs[0], command, strlen);
// Initialize tree
if (nrhs > 0 && !strcmp(command, "createKdTree")) {
const mxArray *mxRefPts = prhs[1];
const mxArray *mxOpts = prhs[2];
// parse options
AnnBuildOptions opts_build;
parse_tree_building_options(mxOpts, opts_build);
// construct the tree
int d = 0;
int n = 0;
ANNpointArray *pts = createPointArray(mxRefPts, d, n);
ANNkd_tree *kd_tree = createKdTree(d, n, pts[0], opts_build);
//mexPrintf("%lld\n", kd_tree);
//mexPrintf("dim = %d\n", kd_tree->theDim());
dims[0] = 2;
dims[1] = 1;
plhs[0] = mxCreateNumericArray(2,dims,mxUINT64_CLASS,mxREAL);
((unsigned long long *)(mxGetData( plhs[0])))[0] = (unsigned long long)kd_tree;
((unsigned long long *)(mxGetData( plhs[0])))[1] = (unsigned long long)pts;
// mexPrintf("Creating:\n");
// mexPrintf("Pts: ");
// for (int i =0;i<MEX_DEBUG_WND;++i){
// mexPrintf("%x",pts[i]);
// }
// mexPrintf("\n");
// mexPrintf("kdTree: ");
// for (int i =0;i<10;++i){
// mexPrintf("%x",((char *)kd_tree)[i]);
// }
// mexPrintf("\n");
}
// Search
else if (nrhs > 0 && !strcmp(command, "performAnnkSearch")) {
// take inputs
const mxArray *mxQuery = prhs[2];
const mxArray *mxOpts = prhs[3];
// parse options
AnnSearchOptions opts_search;
parse_search_options(mxOpts, opts_search);
// get pointer to tree
ANNkd_tree *kd_tree = (ANNkd_tree *)(((unsigned long long *)mxGetData( prhs[1]))[0]);
// mexPrintf("%lld\n", kd_tree);
// mexPrintf("dim = %d\n", kd_tree->theDim());
// perform the search
mxArray *mxInds = NULL;
mxArray *mxDists = NULL;
// mexPrintf("Pts: ");
// for (int i =0;i<MEX_DEBUG_WND;++i){
// mexPrintf("%x",pts[i]);
// }
// mexPrintf("\n");
// mexPrintf("kdTree: ");
// for (int i =0;i<10;++i){
// mexPrintf("%x",((char *)kd_tree)[i]);
// }
// mexPrintf("\n");
//
performAnnkSearch(kd_tree, mxQuery, opts_search, mxInds, mxDists);
// set outputs
plhs[0] = mxInds;
plhs[1] = mxDists;
}
// Deinitialize tree
else if (nrhs > 0 && !strcmp(command, "deleteKdTree")) {
ANNkd_tree *kd_tree = (ANNkd_tree *)(((unsigned long long *)mxGetData( prhs[1]))[0]);
ANNpointArray *pts = (ANNpointArray *)(((unsigned long long *)mxGetData( prhs[1]))[1]);
// mexPrintf("Deleting:\n");
// mexPrintf("Pts: ");
// for (int i =0;i<MEX_DEBUG_WND;++i){
// mexPrintf("%x",pts[i]);
// }
// mexPrintf("\n");
// mexPrintf("kdTree: ");
// for (int i =0;i<10;++i){
// mexPrintf("%x",((char *)kd_tree)[i]);
// }
// mexPrintf("\n");
// release the kd-tree
delete kd_tree;
annDeallocPts(pts[0]);
delete pts;
}
// Close
else if (nrhs > 0 && !strcmp(command, "annClose")) {
annClose();
}
else {
mexPrintf("INVALID COMMAND %s\n", command);
return;
}
}