1 |
greg |
2.1 |
#ifndef lint |
2 |
greg |
2.7 |
static const char RCSid[] = "$Id: pabopto2xml.c,v 2.6 2012/08/26 19:40:02 greg Exp $"; |
3 |
greg |
2.1 |
#endif |
4 |
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/* |
5 |
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* Convert PAB-Opto measurements to XML format using tensor tree representation |
6 |
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* Employs Bonneel et al. Earth Mover's Distance interpolant. |
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* |
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* G.Ward |
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*/ |
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#define _USE_MATH_DEFINES |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <string.h> |
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#include <ctype.h> |
16 |
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#include <math.h> |
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#include "bsdf.h" |
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19 |
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#ifndef GRIDRES |
20 |
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#define GRIDRES 200 /* max. grid resolution per side */ |
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#endif |
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greg |
2.3 |
#define RSCA 2.7 /* radius scaling factor (empirical) */ |
24 |
greg |
2.2 |
|
25 |
greg |
2.6 |
/* convert to/from coded radians */ |
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#define ANG2R(r) (int)((r)*((1<<16)/M_PI)) |
27 |
greg |
2.2 |
#define R2ANG(c) (((c)+.5)*(M_PI/(1<<16))) |
28 |
greg |
2.1 |
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29 |
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typedef struct { |
30 |
greg |
2.5 |
float vsum; /* DSF sum */ |
31 |
greg |
2.1 |
unsigned short nval; /* number of values in sum */ |
32 |
greg |
2.2 |
unsigned short crad; /* radius (coded angle) */ |
33 |
greg |
2.1 |
} GRIDVAL; /* grid value */ |
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35 |
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typedef struct { |
36 |
greg |
2.5 |
float peak; /* lobe value at peak */ |
37 |
greg |
2.2 |
unsigned short crad; /* radius (coded angle) */ |
38 |
greg |
2.1 |
unsigned char gx, gy; /* grid position */ |
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} RBFVAL; /* radial basis function value */ |
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greg |
2.7 |
struct s_rbfnode; /* forward declaration of RBF struct */ |
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43 |
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typedef struct s_migration { |
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struct s_migration *next; /* next in global edge list */ |
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struct s_rbfnode *rbfv[2]; /* from,to vertex */ |
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struct s_migration *enxt[2]; /* next from,to sibling */ |
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float mtx[1]; /* matrix (extends struct) */ |
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} MIGRATION; /* migration link (winged edge structure) */ |
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50 |
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typedef struct s_rbfnode { |
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struct s_rbfnode *next; /* next in global RBF list */ |
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MIGRATION *ejl; /* edge list for this vertex */ |
53 |
greg |
2.1 |
FVECT invec; /* incident vector direction */ |
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int nrbf; /* number of RBFs */ |
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RBFVAL rbfa[1]; /* RBF array (extends struct) */ |
56 |
greg |
2.5 |
} RBFLIST; /* RBF representation of DSF @ 1 incidence */ |
57 |
greg |
2.1 |
|
58 |
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/* our loaded grid for this incident angle */ |
59 |
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static double theta_in_deg, phi_in_deg; |
60 |
greg |
2.5 |
static GRIDVAL dsf_grid[GRIDRES][GRIDRES]; |
61 |
greg |
2.1 |
|
62 |
greg |
2.5 |
/* processed incident DSF measurements */ |
63 |
greg |
2.7 |
static RBFLIST *dsf_list = NULL; |
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/* edge (linking) matrices */ |
66 |
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static MIGRATION *mig_list = NULL; |
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68 |
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#define mtxval(m,i,j) (m)->mtx[(i)*(m)->rbfv[1]->nrbf+(j)] |
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#define nextedge(rbf,m) (m)->enxt[(rbf)==(m)->rbfv[1]] |
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greg |
2.1 |
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71 |
greg |
2.3 |
/* Compute outgoing vector from grid position */ |
72 |
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static void |
73 |
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vec_from_pos(FVECT vec, int xpos, int ypos) |
74 |
greg |
2.1 |
{ |
75 |
greg |
2.3 |
double uv[2]; |
76 |
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double r2; |
77 |
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SDsquare2disk(uv, (1./GRIDRES)*(xpos+.5), (1./GRIDRES)*(ypos+.5)); |
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/* uniform hemispherical projection */ |
80 |
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r2 = uv[0]*uv[0] + uv[1]*uv[1]; |
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vec[0] = vec[1] = sqrt(2. - r2); |
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vec[0] *= uv[0]; |
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vec[1] *= uv[1]; |
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vec[2] = 1. - r2; |
85 |
greg |
2.1 |
} |
86 |
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87 |
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/* Compute grid position from normalized outgoing vector */ |
88 |
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static void |
89 |
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pos_from_vec(int pos[2], const FVECT vec) |
90 |
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{ |
91 |
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double sq[2]; /* uniform hemispherical projection */ |
92 |
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double norm = 1./sqrt(1. + vec[2]); |
93 |
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SDdisk2square(sq, vec[0]*norm, vec[1]*norm); |
95 |
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96 |
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pos[0] = (int)(sq[0]*GRIDRES); |
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pos[1] = (int)(sq[1]*GRIDRES); |
98 |
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} |
99 |
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100 |
greg |
2.5 |
/* Evaluate RBF for DSF at the given normalized outgoing direction */ |
101 |
greg |
2.1 |
static double |
102 |
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eval_rbfrep(const RBFLIST *rp, const FVECT outvec) |
103 |
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{ |
104 |
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double res = .0; |
105 |
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const RBFVAL *rbfp; |
106 |
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FVECT odir; |
107 |
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double sig2; |
108 |
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int n; |
109 |
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110 |
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rbfp = rp->rbfa; |
111 |
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for (n = rp->nrbf; n--; rbfp++) { |
112 |
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vec_from_pos(odir, rbfp->gx, rbfp->gy); |
113 |
greg |
2.2 |
sig2 = R2ANG(rbfp->crad); |
114 |
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sig2 = (DOT(odir,outvec) - 1.) / (sig2*sig2); |
115 |
greg |
2.1 |
if (sig2 > -19.) |
116 |
greg |
2.5 |
res += rbfp->peak * exp(sig2); |
117 |
greg |
2.1 |
} |
118 |
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return(res); |
119 |
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} |
120 |
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121 |
greg |
2.3 |
/* Count up filled nodes and build RBF representation from current grid */ |
122 |
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static RBFLIST * |
123 |
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make_rbfrep(void) |
124 |
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{ |
125 |
greg |
2.6 |
int niter = 16; |
126 |
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double lastVar, thisVar = 100.; |
127 |
greg |
2.3 |
int nn; |
128 |
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RBFLIST *newnode; |
129 |
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int i, j; |
130 |
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131 |
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nn = 0; /* count selected bins */ |
132 |
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for (i = 0; i < GRIDRES; i++) |
133 |
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for (j = 0; j < GRIDRES; j++) |
134 |
greg |
2.6 |
nn += dsf_grid[i][j].nval; |
135 |
greg |
2.3 |
/* allocate RBF array */ |
136 |
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newnode = (RBFLIST *)malloc(sizeof(RBFLIST) + sizeof(RBFVAL)*(nn-1)); |
137 |
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if (newnode == NULL) { |
138 |
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fputs("Out of memory in make_rbfrep\n", stderr); |
139 |
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exit(1); |
140 |
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} |
141 |
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newnode->next = NULL; |
142 |
greg |
2.7 |
newnode->ejl = NULL; |
143 |
greg |
2.3 |
newnode->invec[2] = sin(M_PI/180.*theta_in_deg); |
144 |
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newnode->invec[0] = cos(M_PI/180.*phi_in_deg)*newnode->invec[2]; |
145 |
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newnode->invec[1] = sin(M_PI/180.*phi_in_deg)*newnode->invec[2]; |
146 |
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newnode->invec[2] = sqrt(1. - newnode->invec[2]*newnode->invec[2]); |
147 |
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newnode->nrbf = nn; |
148 |
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nn = 0; /* fill RBF array */ |
149 |
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for (i = 0; i < GRIDRES; i++) |
150 |
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for (j = 0; j < GRIDRES; j++) |
151 |
greg |
2.5 |
if (dsf_grid[i][j].nval) { |
152 |
greg |
2.6 |
newnode->rbfa[nn].peak = dsf_grid[i][j].vsum; |
153 |
greg |
2.5 |
newnode->rbfa[nn].crad = RSCA*dsf_grid[i][j].crad + .5; |
154 |
greg |
2.3 |
newnode->rbfa[nn].gx = i; |
155 |
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newnode->rbfa[nn].gy = j; |
156 |
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++nn; |
157 |
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} |
158 |
greg |
2.6 |
/* iterate to improve interpolation accuracy */ |
159 |
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do { |
160 |
greg |
2.4 |
double dsum = .0, dsum2 = .0; |
161 |
greg |
2.3 |
nn = 0; |
162 |
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for (i = 0; i < GRIDRES; i++) |
163 |
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for (j = 0; j < GRIDRES; j++) |
164 |
greg |
2.5 |
if (dsf_grid[i][j].nval) { |
165 |
greg |
2.3 |
FVECT odir; |
166 |
greg |
2.6 |
double corr; |
167 |
greg |
2.3 |
vec_from_pos(odir, i, j); |
168 |
greg |
2.6 |
newnode->rbfa[nn++].peak *= corr = |
169 |
greg |
2.5 |
dsf_grid[i][j].vsum / |
170 |
greg |
2.3 |
eval_rbfrep(newnode, odir); |
171 |
greg |
2.4 |
dsum += corr - 1.; |
172 |
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dsum2 += (corr-1.)*(corr-1.); |
173 |
greg |
2.3 |
} |
174 |
greg |
2.6 |
lastVar = thisVar; |
175 |
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thisVar = dsum2/(double)nn; |
176 |
greg |
2.4 |
/* |
177 |
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fprintf(stderr, "Avg., RMS error: %.1f%% %.1f%%\n", |
178 |
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100.*dsum/(double)nn, |
179 |
greg |
2.6 |
100.*sqrt(thisVar)); |
180 |
greg |
2.4 |
*/ |
181 |
greg |
2.6 |
} while (--niter > 0 && lastVar-thisVar > 0.02*lastVar); |
182 |
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183 |
greg |
2.5 |
newnode->next = dsf_list; |
184 |
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return(dsf_list = newnode); |
185 |
greg |
2.3 |
} |
186 |
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187 |
greg |
2.1 |
/* Load a set of measurements corresponding to a particular incident angle */ |
188 |
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static int |
189 |
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load_bsdf_meas(const char *fname) |
190 |
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{ |
191 |
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FILE *fp = fopen(fname, "r"); |
192 |
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int inp_is_DSF = -1; |
193 |
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double theta_out, phi_out, val; |
194 |
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char buf[2048]; |
195 |
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int n, c; |
196 |
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197 |
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if (fp == NULL) { |
198 |
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fputs(fname, stderr); |
199 |
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fputs(": cannot open\n", stderr); |
200 |
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return(0); |
201 |
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} |
202 |
greg |
2.5 |
memset(dsf_grid, 0, sizeof(dsf_grid)); |
203 |
greg |
2.1 |
/* read header information */ |
204 |
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while ((c = getc(fp)) == '#' || c == EOF) { |
205 |
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if (fgets(buf, sizeof(buf), fp) == NULL) { |
206 |
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fputs(fname, stderr); |
207 |
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fputs(": unexpected EOF\n", stderr); |
208 |
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fclose(fp); |
209 |
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return(0); |
210 |
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} |
211 |
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if (!strcmp(buf, "format: theta phi DSF\n")) { |
212 |
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inp_is_DSF = 1; |
213 |
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continue; |
214 |
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} |
215 |
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if (!strcmp(buf, "format: theta phi BSDF\n")) { |
216 |
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inp_is_DSF = 0; |
217 |
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continue; |
218 |
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} |
219 |
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if (sscanf(buf, "intheta %lf", &theta_in_deg) == 1) |
220 |
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continue; |
221 |
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if (sscanf(buf, "inphi %lf", &phi_in_deg) == 1) |
222 |
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continue; |
223 |
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if (sscanf(buf, "incident_angle %lf %lf", |
224 |
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&theta_in_deg, &phi_in_deg) == 2) |
225 |
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continue; |
226 |
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} |
227 |
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if (inp_is_DSF < 0) { |
228 |
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fputs(fname, stderr); |
229 |
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fputs(": unknown format\n", stderr); |
230 |
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fclose(fp); |
231 |
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return(0); |
232 |
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} |
233 |
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ungetc(c, fp); /* read actual data */ |
234 |
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while (fscanf(fp, "%lf %lf %lf\n", &theta_out, &phi_out, &val) == 3) { |
235 |
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FVECT ovec; |
236 |
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int pos[2]; |
237 |
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238 |
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ovec[2] = sin(M_PI/180.*theta_out); |
239 |
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ovec[0] = cos(M_PI/180.*phi_out) * ovec[2]; |
240 |
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ovec[1] = sin(M_PI/180.*phi_out) * ovec[2]; |
241 |
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ovec[2] = sqrt(1. - ovec[2]*ovec[2]); |
242 |
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243 |
greg |
2.5 |
if (!inp_is_DSF) |
244 |
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val *= ovec[2]; /* convert from BSDF to DSF */ |
245 |
greg |
2.1 |
|
246 |
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pos_from_vec(pos, ovec); |
247 |
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248 |
greg |
2.5 |
dsf_grid[pos[0]][pos[1]].vsum += val; |
249 |
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dsf_grid[pos[0]][pos[1]].nval++; |
250 |
greg |
2.1 |
} |
251 |
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n = 0; |
252 |
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while ((c = getc(fp)) != EOF) |
253 |
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n += !isspace(c); |
254 |
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if (n) |
255 |
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fprintf(stderr, |
256 |
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"%s: warning: %d unexpected characters past EOD\n", |
257 |
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fname, n); |
258 |
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fclose(fp); |
259 |
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return(1); |
260 |
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} |
261 |
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262 |
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/* Compute radii for non-empty bins */ |
263 |
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/* (distance to furthest empty bin for which non-empty bin is the closest) */ |
264 |
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static void |
265 |
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compute_radii(void) |
266 |
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{ |
267 |
greg |
2.4 |
unsigned int fill_grid[GRIDRES][GRIDRES]; |
268 |
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unsigned short fill_cnt[GRIDRES][GRIDRES]; |
269 |
greg |
2.2 |
FVECT ovec0, ovec1; |
270 |
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double ang2, lastang2; |
271 |
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int r, i, j, jn, ii, jj, inear, jnear; |
272 |
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273 |
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r = GRIDRES/2; /* proceed in zig-zag */ |
274 |
greg |
2.1 |
for (i = 0; i < GRIDRES; i++) |
275 |
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for (jn = 0; jn < GRIDRES; jn++) { |
276 |
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j = (i&1) ? jn : GRIDRES-1-jn; |
277 |
greg |
2.5 |
if (dsf_grid[i][j].nval) /* find empty grid pos. */ |
278 |
greg |
2.1 |
continue; |
279 |
greg |
2.2 |
vec_from_pos(ovec0, i, j); |
280 |
greg |
2.1 |
inear = jnear = -1; /* find nearest non-empty */ |
281 |
greg |
2.2 |
lastang2 = M_PI*M_PI; |
282 |
greg |
2.1 |
for (ii = i-r; ii <= i+r; ii++) { |
283 |
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if (ii < 0) continue; |
284 |
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if (ii >= GRIDRES) break; |
285 |
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for (jj = j-r; jj <= j+r; jj++) { |
286 |
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if (jj < 0) continue; |
287 |
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if (jj >= GRIDRES) break; |
288 |
greg |
2.5 |
if (!dsf_grid[ii][jj].nval) |
289 |
greg |
2.1 |
continue; |
290 |
greg |
2.2 |
vec_from_pos(ovec1, ii, jj); |
291 |
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ang2 = 2. - 2.*DOT(ovec0,ovec1); |
292 |
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if (ang2 >= lastang2) |
293 |
greg |
2.1 |
continue; |
294 |
greg |
2.2 |
lastang2 = ang2; |
295 |
greg |
2.1 |
inear = ii; jnear = jj; |
296 |
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} |
297 |
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} |
298 |
greg |
2.2 |
if (inear < 0) { |
299 |
|
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fputs("Could not find non-empty neighbor!\n", stderr); |
300 |
|
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exit(1); |
301 |
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} |
302 |
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ang2 = sqrt(lastang2); |
303 |
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r = ANG2R(ang2); /* record if > previous */ |
304 |
greg |
2.5 |
if (r > dsf_grid[inear][jnear].crad) |
305 |
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dsf_grid[inear][jnear].crad = r; |
306 |
greg |
2.2 |
/* next search radius */ |
307 |
|
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r = ang2*(2.*GRIDRES/M_PI) + 1; |
308 |
greg |
2.1 |
} |
309 |
greg |
2.4 |
/* blur radii over hemisphere */ |
310 |
greg |
2.1 |
memset(fill_grid, 0, sizeof(fill_grid)); |
311 |
greg |
2.4 |
memset(fill_cnt, 0, sizeof(fill_cnt)); |
312 |
greg |
2.1 |
for (i = 0; i < GRIDRES; i++) |
313 |
|
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for (j = 0; j < GRIDRES; j++) { |
314 |
greg |
2.5 |
if (!dsf_grid[i][j].crad) |
315 |
greg |
2.4 |
continue; /* missing distance */ |
316 |
greg |
2.5 |
r = R2ANG(dsf_grid[i][j].crad)*(2.*RSCA*GRIDRES/M_PI); |
317 |
greg |
2.1 |
for (ii = i-r; ii <= i+r; ii++) { |
318 |
|
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if (ii < 0) continue; |
319 |
|
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if (ii >= GRIDRES) break; |
320 |
|
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for (jj = j-r; jj <= j+r; jj++) { |
321 |
|
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if (jj < 0) continue; |
322 |
|
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if (jj >= GRIDRES) break; |
323 |
greg |
2.4 |
if ((ii-i)*(ii-i) + (jj-j)*(jj-j) > r*r) |
324 |
greg |
2.1 |
continue; |
325 |
greg |
2.5 |
fill_grid[ii][jj] += dsf_grid[i][j].crad; |
326 |
greg |
2.4 |
fill_cnt[ii][jj]++; |
327 |
greg |
2.1 |
} |
328 |
|
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} |
329 |
|
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} |
330 |
greg |
2.6 |
/* copy back blurred radii */ |
331 |
greg |
2.1 |
for (i = 0; i < GRIDRES; i++) |
332 |
|
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for (j = 0; j < GRIDRES; j++) |
333 |
greg |
2.4 |
if (fill_cnt[i][j]) |
334 |
greg |
2.5 |
dsf_grid[i][j].crad = fill_grid[i][j]/fill_cnt[i][j]; |
335 |
greg |
2.1 |
} |
336 |
|
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|
337 |
greg |
2.6 |
/* Cull points for more uniform distribution, leave all nval 0 or 1 */ |
338 |
greg |
2.1 |
static void |
339 |
|
|
cull_values(void) |
340 |
|
|
{ |
341 |
greg |
2.2 |
FVECT ovec0, ovec1; |
342 |
|
|
double maxang, maxang2; |
343 |
|
|
int i, j, ii, jj, r; |
344 |
greg |
2.1 |
/* simple greedy algorithm */ |
345 |
|
|
for (i = 0; i < GRIDRES; i++) |
346 |
|
|
for (j = 0; j < GRIDRES; j++) { |
347 |
greg |
2.5 |
if (!dsf_grid[i][j].nval) |
348 |
greg |
2.1 |
continue; |
349 |
greg |
2.5 |
if (!dsf_grid[i][j].crad) |
350 |
greg |
2.2 |
continue; /* shouldn't happen */ |
351 |
|
|
vec_from_pos(ovec0, i, j); |
352 |
greg |
2.5 |
maxang = 2.*R2ANG(dsf_grid[i][j].crad); |
353 |
greg |
2.2 |
if (maxang > ovec0[2]) /* clamp near horizon */ |
354 |
|
|
maxang = ovec0[2]; |
355 |
|
|
r = maxang*(2.*GRIDRES/M_PI) + 1; |
356 |
|
|
maxang2 = maxang*maxang; |
357 |
greg |
2.1 |
for (ii = i-r; ii <= i+r; ii++) { |
358 |
|
|
if (ii < 0) continue; |
359 |
|
|
if (ii >= GRIDRES) break; |
360 |
|
|
for (jj = j-r; jj <= j+r; jj++) { |
361 |
|
|
if (jj < 0) continue; |
362 |
|
|
if (jj >= GRIDRES) break; |
363 |
greg |
2.5 |
if (!dsf_grid[ii][jj].nval) |
364 |
greg |
2.1 |
continue; |
365 |
greg |
2.2 |
if ((ii == i) & (jj == j)) |
366 |
|
|
continue; /* don't get self-absorbed */ |
367 |
|
|
vec_from_pos(ovec1, ii, jj); |
368 |
|
|
if (2. - 2.*DOT(ovec0,ovec1) >= maxang2) |
369 |
greg |
2.1 |
continue; |
370 |
greg |
2.2 |
/* absorb sum */ |
371 |
greg |
2.5 |
dsf_grid[i][j].vsum += dsf_grid[ii][jj].vsum; |
372 |
|
|
dsf_grid[i][j].nval += dsf_grid[ii][jj].nval; |
373 |
greg |
2.2 |
/* keep value, though */ |
374 |
greg |
2.6 |
dsf_grid[ii][jj].vsum /= (float)dsf_grid[ii][jj].nval; |
375 |
greg |
2.5 |
dsf_grid[ii][jj].nval = 0; |
376 |
greg |
2.1 |
} |
377 |
|
|
} |
378 |
|
|
} |
379 |
greg |
2.6 |
/* final averaging pass */ |
380 |
|
|
for (i = 0; i < GRIDRES; i++) |
381 |
|
|
for (j = 0; j < GRIDRES; j++) |
382 |
|
|
if (dsf_grid[i][j].nval > 1) { |
383 |
|
|
dsf_grid[i][j].vsum /= (float)dsf_grid[i][j].nval; |
384 |
|
|
dsf_grid[i][j].nval = 1; |
385 |
|
|
} |
386 |
greg |
2.1 |
} |
387 |
|
|
|
388 |
|
|
|
389 |
|
|
#if 1 |
390 |
|
|
/* Test main produces a Radiance model from the given input file */ |
391 |
|
|
int |
392 |
|
|
main(int argc, char *argv[]) |
393 |
|
|
{ |
394 |
|
|
char buf[128]; |
395 |
|
|
FILE *pfp; |
396 |
|
|
double bsdf; |
397 |
|
|
FVECT dir; |
398 |
|
|
int i, j, n; |
399 |
|
|
|
400 |
|
|
if (argc != 2) { |
401 |
|
|
fprintf(stderr, "Usage: %s input.dat > output.rad\n", argv[0]); |
402 |
|
|
return(1); |
403 |
|
|
} |
404 |
|
|
if (!load_bsdf_meas(argv[1])) |
405 |
|
|
return(1); |
406 |
|
|
|
407 |
|
|
compute_radii(); |
408 |
|
|
cull_values(); |
409 |
greg |
2.3 |
make_rbfrep(); |
410 |
|
|
/* produce spheres at meas. */ |
411 |
|
|
puts("void plastic yellow\n0\n0\n5 .6 .4 .01 .04 .08\n"); |
412 |
greg |
2.1 |
puts("void plastic pink\n0\n0\n5 .5 .05 .9 .04 .08\n"); |
413 |
|
|
n = 0; |
414 |
|
|
for (i = 0; i < GRIDRES; i++) |
415 |
|
|
for (j = 0; j < GRIDRES; j++) |
416 |
greg |
2.5 |
if (dsf_grid[i][j].vsum > .0f) { |
417 |
greg |
2.1 |
vec_from_pos(dir, i, j); |
418 |
greg |
2.5 |
bsdf = dsf_grid[i][j].vsum / dir[2]; |
419 |
|
|
if (dsf_grid[i][j].nval) { |
420 |
greg |
2.3 |
printf("pink cone c%04d\n0\n0\n8\n", ++n); |
421 |
|
|
printf("\t%.6g %.6g %.6g\n", |
422 |
greg |
2.1 |
dir[0]*bsdf, dir[1]*bsdf, dir[2]*bsdf); |
423 |
greg |
2.3 |
printf("\t%.6g %.6g %.6g\n", |
424 |
greg |
2.1 |
dir[0]*(bsdf+.005), dir[1]*(bsdf+.005), |
425 |
|
|
dir[2]*(bsdf+.005)); |
426 |
greg |
2.3 |
puts("\t.003\t0\n"); |
427 |
|
|
} else { |
428 |
|
|
vec_from_pos(dir, i, j); |
429 |
|
|
printf("yellow sphere s%04d\n0\n0\n", ++n); |
430 |
|
|
printf("4 %.6g %.6g %.6g .0015\n\n", |
431 |
|
|
dir[0]*bsdf, dir[1]*bsdf, dir[2]*bsdf); |
432 |
|
|
} |
433 |
greg |
2.1 |
} |
434 |
|
|
/* output continuous surface */ |
435 |
|
|
puts("void trans tgreen\n0\n0\n7 .7 1 .7 .04 .04 .9 .9\n"); |
436 |
|
|
fflush(stdout); |
437 |
greg |
2.5 |
sprintf(buf, "gensurf tgreen bsdf - - - %d %d", GRIDRES-1, GRIDRES-1); |
438 |
greg |
2.1 |
pfp = popen(buf, "w"); |
439 |
|
|
if (pfp == NULL) { |
440 |
|
|
fputs(buf, stderr); |
441 |
|
|
fputs(": cannot start command\n", stderr); |
442 |
|
|
return(1); |
443 |
|
|
} |
444 |
|
|
for (i = 0; i < GRIDRES; i++) |
445 |
|
|
for (j = 0; j < GRIDRES; j++) { |
446 |
|
|
vec_from_pos(dir, i, j); |
447 |
greg |
2.5 |
bsdf = eval_rbfrep(dsf_list, dir) / dir[2]; |
448 |
greg |
2.1 |
fprintf(pfp, "%.8e %.8e %.8e\n", |
449 |
|
|
dir[0]*bsdf, dir[1]*bsdf, dir[2]*bsdf); |
450 |
|
|
} |
451 |
|
|
return(pclose(pfp)==0 ? 0 : 1); |
452 |
|
|
} |
453 |
|
|
#endif |