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* G. Ward |
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*/ |
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|
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< |
#ifndef _WIN32 |
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> |
#if !defined(_WIN32) && !defined(_WIN64) |
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#include <unistd.h> |
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#include <sys/wait.h> |
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#include <sys/mman.h> |
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/* number of children (-1 in child) */ |
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static int nchild = 0; |
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|
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+ |
/* Compute average DSF value at the given radius from central vector */ |
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static double |
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+ |
eval_DSFsurround(const RBFNODE *rbf, const FVECT outvec, const double rad) |
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{ |
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const int ninc = 12; |
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const double phinc = 2.*M_PI/ninc; |
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double sum = 0; |
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int n = 0; |
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FVECT tvec; |
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int i; |
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/* compute initial vector */ |
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if (output_orient*outvec[2] >= 1.-FTINY) { |
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tvec[0] = tvec[2] = 0; |
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tvec[1] = 1; |
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} else { |
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tvec[0] = tvec[1] = 0; |
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tvec[2] = 1; |
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} |
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geodesic(tvec, outvec, tvec, rad, GEOD_RAD); |
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/* average surrounding DSF */ |
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for (i = 0; i < ninc; i++) { |
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if (i) spinvector(tvec, tvec, outvec, phinc); |
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if (tvec[2] > 0 ^ output_orient > 0) |
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continue; |
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sum += eval_rbfrep(rbf, tvec) * COSF(tvec[2]); |
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++n; |
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} |
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if (n < 2) /* should never happen! */ |
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return(sum); |
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return(sum/(double)n); |
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} |
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|
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/* Estimate single-lobe radius for DSF at the given outgoing angle */ |
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static double |
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est_DSFrad(const RBFNODE *rbf, const FVECT outvec) |
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{ |
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const double rad_epsilon = 0.01; |
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const double DSFtarget = 0.60653066 * eval_rbfrep(rbf,outvec) * |
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COSF(outvec[2]); |
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double inside_rad = rad_epsilon; |
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double outside_rad = 0.5; |
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double DSFinside = eval_DSFsurround(rbf, outvec, inside_rad); |
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double DSFoutside = eval_DSFsurround(rbf, outvec, outside_rad); |
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#define interp_rad inside_rad + (outside_rad-inside_rad) * \ |
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(DSFtarget-DSFinside) / (DSFoutside-DSFinside) |
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/* Newton's method (sort of) */ |
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do { |
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double test_rad = interp_rad; |
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double DSFtest; |
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if ((test_rad >= outside_rad) | (test_rad <= inside_rad)) |
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test_rad = .5*(inside_rad + outside_rad); |
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DSFtest = eval_DSFsurround(rbf, outvec, test_rad); |
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if (DSFtest > DSFtarget) { |
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inside_rad = test_rad; |
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DSFinside = DSFtest; |
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} else { |
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outside_rad = test_rad; |
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DSFoutside = DSFtest; |
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} |
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} while (outside_rad-inside_rad > rad_epsilon); |
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|
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return(.5*(inside_rad + outside_rad)); |
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#undef interp_rad |
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} |
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|
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static int |
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+ |
dbl_cmp(const void *p1, const void *p2) |
97 |
+ |
{ |
98 |
+ |
double d1 = *(const double *)p1; |
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double d2 = *(const double *)p2; |
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+ |
|
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if (d1 > d2) return(1); |
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if (d1 < d2) return(-1); |
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return(0); |
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} |
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|
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+ |
/* Conservative estimate of average BSDF value from current DSF's */ |
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+ |
static void |
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+ |
comp_bsdf_spec(void) |
109 |
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{ |
110 |
+ |
double vmod_sum = 0; |
111 |
+ |
double rad_sum = 0; |
112 |
+ |
int n = 0; |
113 |
+ |
double *cost_list = NULL; |
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+ |
double max_cost = 1.; |
115 |
+ |
RBFNODE *rbf; |
116 |
+ |
FVECT sdv; |
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+ |
/* sort by incident altitude */ |
118 |
+ |
for (rbf = dsf_list; rbf != NULL; rbf = rbf->next) |
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+ |
n++; |
120 |
+ |
if (n >= 10) |
121 |
+ |
cost_list = (double *)malloc(sizeof(double)*n); |
122 |
+ |
if (cost_list == NULL) { |
123 |
+ |
bsdf_spec_val = 0; |
124 |
+ |
bsdf_spec_rad = 0; |
125 |
+ |
return; |
126 |
+ |
} |
127 |
+ |
n = 0; |
128 |
+ |
for (rbf = dsf_list; rbf != NULL; rbf = rbf->next) |
129 |
+ |
cost_list[n++] = rbf->invec[2]*input_orient; |
130 |
+ |
qsort(cost_list, n, sizeof(double), dbl_cmp); |
131 |
+ |
max_cost = cost_list[(n+3)/4]; /* accept 25% nearest grazing */ |
132 |
+ |
free(cost_list); |
133 |
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n = 0; |
134 |
+ |
for (rbf = dsf_list; rbf != NULL; rbf = rbf->next) { |
135 |
+ |
double this_rad, cosfact, vest; |
136 |
+ |
if (rbf->invec[2]*input_orient > max_cost) |
137 |
+ |
continue; |
138 |
+ |
sdv[0] = -rbf->invec[0]; |
139 |
+ |
sdv[1] = -rbf->invec[1]; |
140 |
+ |
sdv[2] = rbf->invec[2]*(2*(input_orient==output_orient) - 1); |
141 |
+ |
cosfact = COSF(sdv[2]); |
142 |
+ |
this_rad = est_DSFrad(rbf, sdv); |
143 |
+ |
vest = eval_rbfrep(rbf, sdv) * cosfact * |
144 |
+ |
(2.*M_PI) * this_rad*this_rad; |
145 |
+ |
if (vest > rbf->vtotal) /* don't over-estimate energy */ |
146 |
+ |
vest = rbf->vtotal; |
147 |
+ |
vmod_sum += vest / cosfact; /* remove cosine factor */ |
148 |
+ |
rad_sum += this_rad; |
149 |
+ |
++n; |
150 |
+ |
} |
151 |
+ |
bsdf_spec_rad = rad_sum/(double)n; |
152 |
+ |
bsdf_spec_val = vmod_sum/(2.*M_PI*n*bsdf_spec_rad*bsdf_spec_rad); |
153 |
+ |
} |
154 |
+ |
|
155 |
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/* Create a new migration holder (sharing memory for multiprocessing) */ |
156 |
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static MIGRATION * |
157 |
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new_migration(RBFNODE *from_rbf, RBFNODE *to_rbf) |
159 |
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size_t memlen = sizeof(MIGRATION) + |
160 |
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sizeof(float)*(from_rbf->nrbf*to_rbf->nrbf - 1); |
161 |
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MIGRATION *newmig; |
162 |
< |
#ifdef _WIN32 |
162 |
> |
#if defined(_WIN32) || defined(_WIN64) |
163 |
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if (nprocs > 1) |
164 |
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fprintf(stderr, "%s: warning - multiprocessing not supported\n", |
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progname); |
190 |
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return(mig_list = newmig); |
191 |
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} |
192 |
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|
193 |
< |
#ifdef _WIN32 |
193 |
> |
#if defined(_WIN32) || defined(_WIN64) |
194 |
|
#define await_children(n) (void)(n) |
195 |
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#define run_subprocess() 0 |
196 |
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#define end_subprocess() (void)0 |
441 |
|
ej1 = create_migration(tvert[0], edge->rbfv[1]); |
442 |
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mesh_from_edge(ej0); |
443 |
|
mesh_from_edge(ej1); |
444 |
+ |
return; |
445 |
|
} |
446 |
< |
} else if (tvert[1] == NULL) { /* grow mesh on left */ |
446 |
> |
} |
447 |
> |
if (tvert[1] == NULL) { /* grow mesh on left */ |
448 |
|
tvert[1] = find_chull_vert(edge->rbfv[1], edge->rbfv[0]); |
449 |
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if (tvert[1] != NULL) { |
450 |
|
if (tvert[1]->ord > edge->rbfv[0]->ord) |
488 |
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default: |
489 |
|
return; /* else we can interpolate */ |
490 |
|
} |
491 |
< |
for (rbf = near_rbf->next; rbf != NULL; rbf = rbf->next) { |
491 |
> |
for (rbf = dsf_list; rbf != NULL; rbf = rbf->next) { |
492 |
|
const double d = input_orient*rbf->invec[2]; |
493 |
|
if (d >= 1.-2.*FTINY) |
494 |
|
return; /* seems we have normal */ |
521 |
|
if (create_migration(mir_rbf, near_rbf) == NULL) |
522 |
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exit(1); /* XXX should never happen! */ |
523 |
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norm_vec[2] = input_orient; /* interpolate normal dist. */ |
524 |
< |
rbf = e_advect_rbf(mig_list, norm_vec, 2*near_rbf->nrbf); |
524 |
> |
rbf = e_advect_rbf(mig_list, norm_vec, 0); |
525 |
|
nprocs = saved_nprocs; /* final clean-up */ |
526 |
|
free(mir_rbf); |
527 |
|
free(mig_list); |
541 |
|
double best2 = M_PI*M_PI; |
542 |
|
RBFNODE *shrt_edj[2]; |
543 |
|
RBFNODE *rbf0, *rbf1; |
544 |
+ |
/* average specular peak */ |
545 |
+ |
comp_bsdf_spec(); |
546 |
|
/* add normal if needed */ |
547 |
|
check_normal_incidence(); |
548 |
|
/* check if isotropic */ |