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#include<stdio.h> |
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#include<math.h> |
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#include<stdlib.h> |
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#define max_sites 10000 |
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#include<string.h> |
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#define max_sites 15000 |
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#define MYSEED 8973247 |
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int nsites, xlat, ylat; |
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int attemp, nacc; |
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int main() |
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int main(argc, argv) |
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int argc; |
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char *argv[]; |
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{ |
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void getmag(); |
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double eneri(double xi, double yi, double zi, double phii, double thetai, int i, int jb); |
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double toterg(); |
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void adjust(); |
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void mcmove(); |
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void store(FILE *outFile); |
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void getmag(); |
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double eneri(double xi, double yi, double zi, double phii, double thetai, int i, int jb); |
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double toterg(); |
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void adjust(); |
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void mcmove(); |
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void store(FILE *outFile); |
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|
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double twopi, nnd, myran, kb; |
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double ent; |
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int icycl, ncycl, imove, nmoves, nsamp; |
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int nx, ny, which, i, j; |
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|
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FILE *inFile; |
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char *endptr, s[100000]; |
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double ux, uy, uz; |
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|
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FILE *outFile; |
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outFile=fopen("dp_file1","a"); |
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|
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srand48(MYSEED); |
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|
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// These two parameters set the size of the system: |
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double twopi, nnd, myran, kb; |
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double ent; |
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int icycl, ncycl, imove, nmoves, nsamp; |
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int nx, ny, which, i, j; |
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|
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FILE *outFile; |
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outFile=fopen("dp_file","w"); |
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|
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srand48(MYSEED); |
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|
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domsizex = 231.0; |
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domsizey = 231.0; |
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nnd = 7.0; |
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strength = 10.0; |
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ncycl = 100000000; |
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nmoves = 100; |
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nsamp = 200; |
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twopi = 2.0 * M_PI; |
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dtheta = 0.1; |
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kb = 0.0019872198; |
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beta = 1.0 / (kb * 300.0); |
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z0 = 0.0; |
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deltaz = 0.1; |
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deltaphi = 0.1; |
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kz = kb; |
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ktheta = kb; |
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theta0 = M_PI / 2.0; |
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nnd = 7.0; |
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ny = 100; |
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|
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nx = (int) (2.5 * domsizey / sqrt(3.0) / nnd) + 1; |
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ny = (int) (domsizex / nnd) + 1; |
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// we want the domains to be roughly square: |
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which = 0; |
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xlat = 0; |
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for(i=1;i<=nx;i++) |
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{ |
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if ((i*sqrt(3.0)*nnd)<domsizex) |
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{ |
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xlat = xlat + 2; |
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ylat = 0; |
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for(j=1;j<=ny;j++) |
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{ |
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if((j*nnd)<domsizey) |
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{ |
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which = which + 1; |
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x[which] = i * sqrt(3.0) * nnd; |
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y[which] = j * nnd; |
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myran = drand48(); |
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phi[which] = myran * twopi; |
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myran = drand48(); |
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theta[which] = acos(2.0*myran-1.0); |
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myran = drand48(); |
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z[which]=z0 + (2.0*myran-1.0)*deltaz; |
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mu[which] = strength; |
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|
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which = which + 1; |
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x[which] = nnd* sqrt(3.0) * (2.0*i+1.0) / 2.0; |
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y[which] = nnd* ( 2.0*j+1.0 ) / 2.0; |
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myran = drand48(); |
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phi[which] = myran * twopi; |
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myran = drand48(); |
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theta[which] = acos(2.0*myran-1.0); |
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myran = drand48(); |
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z[which] = z0 + (2.0*myran-1.0) * deltaz; |
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mu[which] = strength; |
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ylat = ylat + 2; |
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} |
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} |
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} |
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} |
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nx = (int) ((double)ny / sqrt(3.0)); |
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nsites= which; |
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en=toterg(); |
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printf("\nthe initial energy is : \t%f\n\n",en); |
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// periodic box boundaries: |
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attemp = 0; |
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nacc = 0; |
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|
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adjust(); |
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domsizex = sqrt(3.0) * nx * nnd; |
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domsizey = ny * nnd; |
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for(icycl=1;icycl<=ncycl;icycl++) |
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strength = 10.0; |
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ncycl = 1e7; |
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nmoves = 100; |
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nsamp = 100; |
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twopi = 2.0 * M_PI; |
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dtheta = 0.1; |
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kb = 0.0019872198; |
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beta = 1.0 / (kb * 300.0); |
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z0 = 0.0; |
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deltaz = 0.1; |
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deltaphi = 0.1; |
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kz = kb; |
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ktheta = kb; |
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theta0 = M_PI / 2.0; |
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|
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which = 0; |
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xlat = 0; |
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|
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if( strcmp(argv[1], "-resume") == 0) { |
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|
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inFile = fopen("./l_con","r"); |
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if (inFile == NULL){ |
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printf("Error opening file\n"); |
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exit(-1); |
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} |
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|
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while(!feof(inFile)) |
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{ |
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fgets(s, 500, inFile); |
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nsites = atoi(s); |
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fscanf(inFile,"%s",s); |
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xlat= atoi(s); |
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fscanf(inFile,"%s",s); |
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ylat= atoi(s); |
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for(i=1; i<=nsites; i++) |
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{ |
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fscanf(inFile,"%s",s); |
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fscanf(inFile,"%s",s); |
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x[i] = strtod(s, &endptr); |
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fscanf(inFile,"%s",s); |
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y[i] = strtod(s, &endptr); |
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fscanf(inFile,"%s",s); |
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z[i] = strtod(s, &endptr); |
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fscanf(inFile,"%s",s); |
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phi[i] = strtod(s, &endptr); |
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fscanf(inFile,"%s",s); |
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ux = strtod(s, &endptr); |
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fscanf(inFile,"%s",s); |
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uy = strtod(s, &endptr); |
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fscanf(inFile,"%s",s); |
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uz = strtod(s, &endptr); |
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theta[i] = acos(uz); |
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mu[i] = strength; |
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} |
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} |
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fclose(inFile); |
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printf("%f\t%f\t%f\t%f\t%f\n", x[nsites], y[nsites], z[nsites], phi[nsites], theta[nsites]); |
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} |
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|
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else{ |
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for(i=0; i < nx; i++) { |
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|
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xlat = xlat + 2; |
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ylat = 0; |
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|
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for(j=0; j<ny; j++) { |
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|
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which = which + 1; |
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x[which] = i * sqrt(3.0) * nnd; |
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y[which] = j * nnd; |
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myran = drand48(); |
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phi[which] = myran * twopi; |
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myran = drand48(); |
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theta[which] = acos(2.0*myran-1.0); |
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myran = drand48(); |
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z[which]=z0 + (2.0*myran-1.0)*deltaz; |
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mu[which] = strength; |
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|
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which = which + 1; |
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|
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printf("%d\n", which); |
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|
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x[which] = nnd* sqrt(3.0) * (2.0*i + 1.0) / 2.0; |
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y[which] = nnd* ( 2.0*j+1.0 ) / 2.0; |
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myran = drand48(); |
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phi[which] = myran * twopi; |
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myran = drand48(); |
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theta[which] = acos(2.0*myran-1.0); |
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myran = drand48(); |
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z[which] = z0 + (2.0*myran-1.0) * deltaz; |
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mu[which] = strength; |
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ylat = ylat + 2; |
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} |
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} |
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|
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nsites= which; |
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} |
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|
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en=toterg(); |
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printf("\nthe initial energy is : \t%f\n\n",en); |
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|
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attemp = 0; |
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nacc = 0; |
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|
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adjust(); |
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|
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for(icycl=1;icycl<=ncycl;icycl++) |
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{ |
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for(imove=1;imove<=nmoves;imove++) |
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{ |
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{ |
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if(j!=i) |
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{ |
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dx = x[j]-xi; |
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if(fabs(dx)>(domsizex/2.0)) dx = dx - domsizex*copysign(1.0,dx)*(double)(int)(fabs(dx /domsizex)+0.5); |
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dy = y[j]-yi; |
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if(fabs(dy)>(domsizey/2.0)) dy = dy - domsizey*copysign(1.0,dy)*(double)(int)(fabs(dy /domsizey)+0.5); |
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dz = z[j]-zi; |
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|
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r2 = dx*dx+dy*dy+dz*dz; |
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r = sqrt(r2); |
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if(r<rcut) |
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{ |
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r3 = r2*r; |
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r5 = r2*r3; |
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|
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uxj = mu[j]*cos(phi[j]) * sin(theta[j]); |
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uyj = mu[j]*sin(phi[j]) * sin(theta[j]); |
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uzj = mu[j] * cos(theta[j]); |
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udotu = uxi*uxj + uyi*uyj + uzi*uzj; |
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rdotui = dx*uxi + dy*uyi + dz*uzi; |
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rdotuj = dx*uxj + dy*uyj + dz*uzj; |
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|
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vij = pre*(udotu/r3 - 3.0*rdotui*rdotuj/r5); |
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eni = eni + vij; |
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} |
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dx = x[j]-xi; |
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if(fabs(dx)>(domsizex/2.0)) dx = dx - domsizex*copysign(1.0,dx)*(double)(int)(fabs(dx /domsizex)+0.5); |
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dy = y[j]-yi; |
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if(fabs(dy)>(domsizey/2.0)) dy = dy - domsizey*copysign(1.0,dy)*(double)(int)(fabs(dy /domsizey)+0.5); |
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dz = z[j]-zi; |
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|
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r2 = dx*dx+dy*dy+dz*dz; |
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r = sqrt(r2); |
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if(r<rcut) |
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{ |
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r3 = r2*r; |
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r5 = r2*r3; |
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|
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uxj = mu[j]*cos(phi[j]) * sin(theta[j]); |
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uyj = mu[j]*sin(phi[j]) * sin(theta[j]); |
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uzj = mu[j] * cos(theta[j]); |
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udotu = uxi*uxj + uyi*uyj + uzi*uzj; |
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rdotui = dx*uxi + dy*uyi + dz*uzi; |
283 |
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rdotuj = dx*uxj + dy*uyj + dz*uzj; |
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|
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vij = pre*(udotu/r3 - 3.0*rdotui*rdotuj/r5); |
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eni = eni + vij; |
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} |
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} |
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} |
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vint = 0.5 * kz * (zi-z0) * (zi-z0) + 0.5 * ktheta * (thetai-theta0) * (thetai-theta0); |