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#ifndef lint |
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static const char RCSid[] = "$Id: bsdftrans.cpp,v 2.3 2014/03/29 21:51:59 greg Exp $"; |
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#endif |
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/* |
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* Compute mass transport plan for RBF lobes |
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*/ |
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|
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#define _USE_MATH_DEFINES |
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#include <stdio.h> |
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#include <string.h> |
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#include "transportSimplex.h" |
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#include "bsdfrep.h" |
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|
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using namespace t_simplex; |
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using namespace std; |
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|
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/* Compute mass transport plan (internal call) */ |
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extern "C" void |
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plan_transport(MIGRATION *mig) |
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{ |
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double *src; |
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double *dst; |
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TsFlow *flow; |
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|
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src = new double[mtx_nrows(mig)]; |
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dst = new double[mtx_ncols(mig)]; |
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|
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TsSignature<RBFVAL> srcSig(mtx_nrows(mig), mig->rbfv[0]->rbfa, src); |
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TsSignature<RBFVAL> dstSig(mtx_ncols(mig), mig->rbfv[1]->rbfa, dst); |
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flow = new TsFlow[mtx_nrows(mig)+mtx_ncols(mig)-1]; |
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int n; |
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/* clear flow matrix */ |
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memset(mig->mtx, 0, sizeof(float)*mtx_nrows(mig)*mtx_ncols(mig)); |
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/* set supplies & demands */ |
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for (n = mtx_nrows(mig); n--; ) |
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src[n] = rbf_volume(&mig->rbfv[0]->rbfa[n]) / |
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mig->rbfv[0]->vtotal; |
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for (n = mtx_ncols(mig); n--; ) |
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dst[n] = rbf_volume(&mig->rbfv[1]->rbfa[n]) / |
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mig->rbfv[1]->vtotal; |
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|
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n = 0; /* minimize EMD */ |
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try { |
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transportSimplex(&srcSig, &dstSig, &lobe_distance, flow, &n); |
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} catch (...) { |
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fprintf(stderr, "%s: caught exception from transportSimplex()!\n", |
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progname); |
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exit(1); |
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} |
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if (n > mtx_nrows(mig)+mtx_ncols(mig)-1) { |
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fprintf(stderr, "%s: signature overflow in plan_transport()!\n", |
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progname); |
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exit(1); |
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} |
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while (n-- > 0) /* assign sparse matrix */ |
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mtx_coef(mig, flow[n].from, flow[n].to) = flow[n].amount; |
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|
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delete[] src; |
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delete[] dst; |
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delete[] flow; |
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} |
