| 1 |
greg |
2.1 |
#ifndef lint
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| 2 |
greg |
2.11 |
static const char RCSid[] = "$Id: bsdfrbf.c,v 2.10 2013/10/18 02:49:30 greg Exp $";
|
| 3 |
greg |
2.1 |
#endif
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| 4 |
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/*
|
| 5 |
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* Radial basis function representation for BSDF data.
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| 6 |
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*
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| 7 |
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* G. Ward
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| 8 |
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*/
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| 9 |
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| 10 |
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#define _USE_MATH_DEFINES
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| 11 |
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#include <stdio.h>
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| 12 |
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#include <stdlib.h>
|
| 13 |
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#include <string.h>
|
| 14 |
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#include <math.h>
|
| 15 |
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#include "bsdfrep.h"
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| 16 |
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| 17 |
greg |
2.9 |
#ifndef MINRSCA
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| 18 |
greg |
2.11 |
#define MINRSCA 1.0 /* minimum radius scaling factor */
|
| 19 |
greg |
2.9 |
#endif
|
| 20 |
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#ifndef MAXRSCA
|
| 21 |
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#define MAXRSCA 2.7 /* maximum radius scaling factor */
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| 22 |
greg |
2.1 |
#endif
|
| 23 |
greg |
2.11 |
#ifndef VARTHRESH
|
| 24 |
|
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#define VARTHRESH 0.0015 /* culling variance threshold */
|
| 25 |
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#endif
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| 26 |
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#ifndef DIFFMAX2
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| 27 |
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#define DIFFMAX2 (16.*VARTHRESH) /* maximum ignored sample variance */
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| 28 |
greg |
2.10 |
#endif
|
| 29 |
greg |
2.7 |
#ifndef MAXFRAC
|
| 30 |
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#define MAXFRAC 0.5 /* maximum contribution to neighbor */
|
| 31 |
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#endif
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| 32 |
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#ifndef NNEIGH
|
| 33 |
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#define NNEIGH 10 /* number of neighbors to consider */
|
| 34 |
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#endif
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| 35 |
greg |
2.1 |
/* our loaded grid for this incident angle */
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| 36 |
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GRIDVAL dsf_grid[GRIDRES][GRIDRES];
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| 37 |
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| 38 |
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/* Start new DSF input grid */
|
| 39 |
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void
|
| 40 |
|
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new_bsdf_data(double new_theta, double new_phi)
|
| 41 |
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{
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| 42 |
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if (!new_input_direction(new_theta, new_phi))
|
| 43 |
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exit(1);
|
| 44 |
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memset(dsf_grid, 0, sizeof(dsf_grid));
|
| 45 |
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}
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| 46 |
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| 47 |
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/* Add BSDF data point */
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| 48 |
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void
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| 49 |
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add_bsdf_data(double theta_out, double phi_out, double val, int isDSF)
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| 50 |
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{
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| 51 |
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FVECT ovec;
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| 52 |
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int pos[2];
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| 53 |
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| 54 |
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if (!output_orient) /* check output orientation */
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| 55 |
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output_orient = 1 - 2*(theta_out > 90.);
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| 56 |
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else if (output_orient > 0 ^ theta_out < 90.) {
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| 57 |
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fputs("Cannot handle output angles on both sides of surface\n",
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| 58 |
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stderr);
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| 59 |
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exit(1);
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| 60 |
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}
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| 61 |
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ovec[2] = sin((M_PI/180.)*theta_out);
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| 62 |
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ovec[0] = cos((M_PI/180.)*phi_out) * ovec[2];
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| 63 |
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ovec[1] = sin((M_PI/180.)*phi_out) * ovec[2];
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| 64 |
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ovec[2] = sqrt(1. - ovec[2]*ovec[2]);
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| 65 |
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|
| 66 |
greg |
2.8 |
if (val <= 0) /* truncate to zero */
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| 67 |
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val = 0;
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| 68 |
|
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else if (!isDSF)
|
| 69 |
greg |
2.1 |
val *= ovec[2]; /* convert from BSDF to DSF */
|
| 70 |
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|
| 71 |
greg |
2.4 |
/* update BSDF histogram */
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| 72 |
|
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if (val < BSDF2BIG*ovec[2] && val > BSDF2SML*ovec[2])
|
| 73 |
|
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++bsdf_hist[histndx(val/ovec[2])];
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| 74 |
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|
| 75 |
greg |
2.1 |
pos_from_vec(pos, ovec);
|
| 76 |
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|
| 77 |
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dsf_grid[pos[0]][pos[1]].vsum += val;
|
| 78 |
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dsf_grid[pos[0]][pos[1]].nval++;
|
| 79 |
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}
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| 80 |
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| 81 |
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/* Compute radii for non-empty bins */
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| 82 |
greg |
2.9 |
/* (distance to furthest empty bin for which non-empty test bin is closest) */
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| 83 |
greg |
2.1 |
static void
|
| 84 |
|
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compute_radii(void)
|
| 85 |
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{
|
| 86 |
greg |
2.9 |
const int cradmin = ANG2R(.5*M_PI/GRIDRES);
|
| 87 |
greg |
2.1 |
unsigned int fill_grid[GRIDRES][GRIDRES];
|
| 88 |
|
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unsigned short fill_cnt[GRIDRES][GRIDRES];
|
| 89 |
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FVECT ovec0, ovec1;
|
| 90 |
|
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double ang2, lastang2;
|
| 91 |
|
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int r, i, j, jn, ii, jj, inear, jnear;
|
| 92 |
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| 93 |
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r = GRIDRES/2; /* proceed in zig-zag */
|
| 94 |
|
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for (i = 0; i < GRIDRES; i++)
|
| 95 |
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for (jn = 0; jn < GRIDRES; jn++) {
|
| 96 |
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j = (i&1) ? jn : GRIDRES-1-jn;
|
| 97 |
|
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if (dsf_grid[i][j].nval) /* find empty grid pos. */
|
| 98 |
|
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continue;
|
| 99 |
|
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ovec_from_pos(ovec0, i, j);
|
| 100 |
|
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inear = jnear = -1; /* find nearest non-empty */
|
| 101 |
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lastang2 = M_PI*M_PI;
|
| 102 |
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for (ii = i-r; ii <= i+r; ii++) {
|
| 103 |
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if (ii < 0) continue;
|
| 104 |
|
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if (ii >= GRIDRES) break;
|
| 105 |
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for (jj = j-r; jj <= j+r; jj++) {
|
| 106 |
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if (jj < 0) continue;
|
| 107 |
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if (jj >= GRIDRES) break;
|
| 108 |
|
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if (!dsf_grid[ii][jj].nval)
|
| 109 |
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continue;
|
| 110 |
|
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ovec_from_pos(ovec1, ii, jj);
|
| 111 |
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ang2 = 2. - 2.*DOT(ovec0,ovec1);
|
| 112 |
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if (ang2 >= lastang2)
|
| 113 |
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continue;
|
| 114 |
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lastang2 = ang2;
|
| 115 |
|
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inear = ii; jnear = jj;
|
| 116 |
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}
|
| 117 |
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}
|
| 118 |
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if (inear < 0) {
|
| 119 |
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fprintf(stderr,
|
| 120 |
|
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"%s: Could not find non-empty neighbor!\n",
|
| 121 |
|
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progname);
|
| 122 |
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exit(1);
|
| 123 |
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}
|
| 124 |
|
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ang2 = sqrt(lastang2);
|
| 125 |
|
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r = ANG2R(ang2); /* record if > previous */
|
| 126 |
|
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if (r > dsf_grid[inear][jnear].crad)
|
| 127 |
|
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dsf_grid[inear][jnear].crad = r;
|
| 128 |
|
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/* next search radius */
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| 129 |
|
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r = ang2*(2.*GRIDRES/M_PI) + 3;
|
| 130 |
|
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}
|
| 131 |
greg |
2.10 |
for (i = 0; i < GRIDRES; i++) /* grow radii where uniform */
|
| 132 |
|
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for (j = 0; j < GRIDRES; j++) {
|
| 133 |
greg |
2.11 |
double midmean = 0.0;
|
| 134 |
|
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int nsum = 0;
|
| 135 |
greg |
2.10 |
if (!dsf_grid[i][j].nval)
|
| 136 |
|
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continue;
|
| 137 |
greg |
2.11 |
r = 1; /* avg. immediate neighbors */
|
| 138 |
|
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for (ii = i-r; ii <= i+r; ii++) {
|
| 139 |
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if (ii < 0) continue;
|
| 140 |
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if (ii >= GRIDRES) break;
|
| 141 |
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for (jj = j-r; jj <= j+r; jj++) {
|
| 142 |
|
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if (jj < 0) continue;
|
| 143 |
|
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if (jj >= GRIDRES) break;
|
| 144 |
|
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midmean += dsf_grid[ii][jj].vsum;
|
| 145 |
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nsum += dsf_grid[ii][jj].nval;
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| 146 |
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}
|
| 147 |
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}
|
| 148 |
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midmean /= (double)nsum;
|
| 149 |
greg |
2.10 |
while (++r < GRIDRES) { /* attempt to grow perimeter */
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| 150 |
greg |
2.11 |
double diff2sum = 0.0;
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| 151 |
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nsum = 0;
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| 152 |
greg |
2.10 |
for (ii = i-r; ii <= i+r; ii++) {
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| 153 |
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int jstep = 1;
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| 154 |
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if (ii < 0) continue;
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| 155 |
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if (ii >= GRIDRES) break;
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| 156 |
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if ((i-r < ii) & (ii < i+r))
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| 157 |
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jstep = r<<1;
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| 158 |
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for (jj = j-r; jj <= j+r; jj += jstep) {
|
| 159 |
greg |
2.11 |
double d2;
|
| 160 |
greg |
2.10 |
if (jj < 0) continue;
|
| 161 |
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if (jj >= GRIDRES) break;
|
| 162 |
greg |
2.11 |
if (!dsf_grid[ii][jj].nval)
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| 163 |
|
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continue;
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| 164 |
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d2 = midmean - dsf_grid[ii][jj].vsum /
|
| 165 |
|
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(double)dsf_grid[ii][jj].nval;
|
| 166 |
|
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d2 *= d2;
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| 167 |
|
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if (d2 > DIFFMAX2*midmean*midmean)
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| 168 |
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goto escape;
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| 169 |
|
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diff2sum += d2;
|
| 170 |
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++nsum;
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| 171 |
greg |
2.10 |
}
|
| 172 |
|
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}
|
| 173 |
greg |
2.11 |
if (diff2sum > VARTHRESH*midmean*midmean*(double)nsum)
|
| 174 |
|
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break;
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| 175 |
greg |
2.10 |
}
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| 176 |
greg |
2.11 |
escape: --r;
|
| 177 |
|
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r = ANG2R(r*(M_PI/MAXRSCA/GRIDRES));
|
| 178 |
|
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if (r < cradmin)
|
| 179 |
|
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r = cradmin;
|
| 180 |
|
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if (dsf_grid[i][j].crad < r)
|
| 181 |
|
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dsf_grid[i][j].crad = r;
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| 182 |
greg |
2.10 |
}
|
| 183 |
greg |
2.1 |
/* blur radii over hemisphere */
|
| 184 |
|
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memset(fill_grid, 0, sizeof(fill_grid));
|
| 185 |
|
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memset(fill_cnt, 0, sizeof(fill_cnt));
|
| 186 |
|
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for (i = 0; i < GRIDRES; i++)
|
| 187 |
|
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for (j = 0; j < GRIDRES; j++) {
|
| 188 |
greg |
2.9 |
if (!dsf_grid[i][j].nval)
|
| 189 |
|
|
continue; /* not part of this */
|
| 190 |
|
|
r = R2ANG(dsf_grid[i][j].crad)*(2.*MAXRSCA*GRIDRES/M_PI);
|
| 191 |
greg |
2.1 |
for (ii = i-r; ii <= i+r; ii++) {
|
| 192 |
|
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if (ii < 0) continue;
|
| 193 |
|
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if (ii >= GRIDRES) break;
|
| 194 |
|
|
for (jj = j-r; jj <= j+r; jj++) {
|
| 195 |
|
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if (jj < 0) continue;
|
| 196 |
|
|
if (jj >= GRIDRES) break;
|
| 197 |
|
|
if ((ii-i)*(ii-i) + (jj-j)*(jj-j) > r*r)
|
| 198 |
|
|
continue;
|
| 199 |
|
|
fill_grid[ii][jj] += dsf_grid[i][j].crad;
|
| 200 |
|
|
fill_cnt[ii][jj]++;
|
| 201 |
|
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}
|
| 202 |
|
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}
|
| 203 |
|
|
}
|
| 204 |
|
|
/* copy back blurred radii */
|
| 205 |
|
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for (i = 0; i < GRIDRES; i++)
|
| 206 |
|
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for (j = 0; j < GRIDRES; j++)
|
| 207 |
|
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if (fill_cnt[i][j])
|
| 208 |
|
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dsf_grid[i][j].crad = fill_grid[i][j]/fill_cnt[i][j];
|
| 209 |
|
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}
|
| 210 |
|
|
|
| 211 |
greg |
2.11 |
/* Radius comparison for qsort() */
|
| 212 |
|
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static int
|
| 213 |
|
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radius_cmp(const void *p1, const void *p2)
|
| 214 |
|
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{
|
| 215 |
|
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return( (int)dsf_grid[0][*(const int *)p1].crad -
|
| 216 |
|
|
(int)dsf_grid[0][*(const int *)p2].crad );
|
| 217 |
|
|
}
|
| 218 |
|
|
|
| 219 |
greg |
2.1 |
/* Cull points for more uniform distribution, leave all nval 0 or 1 */
|
| 220 |
|
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static void
|
| 221 |
|
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cull_values(void)
|
| 222 |
|
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{
|
| 223 |
greg |
2.11 |
int indx[GRIDRES*GRIDRES];
|
| 224 |
greg |
2.1 |
FVECT ovec0, ovec1;
|
| 225 |
|
|
double maxang, maxang2;
|
| 226 |
greg |
2.11 |
int i, j, k, ii, jj, r;
|
| 227 |
|
|
/* sort by radius first */
|
| 228 |
|
|
for (k = GRIDRES*GRIDRES; k--; )
|
| 229 |
|
|
indx[k] = k;
|
| 230 |
|
|
qsort(indx, GRIDRES*GRIDRES, sizeof(int), &radius_cmp);
|
| 231 |
greg |
2.1 |
/* simple greedy algorithm */
|
| 232 |
greg |
2.11 |
for (k = GRIDRES*GRIDRES; k--; ) {
|
| 233 |
|
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i = indx[k]/GRIDRES; /* from biggest radius down */
|
| 234 |
|
|
j = indx[k] - i*GRIDRES;
|
| 235 |
greg |
2.1 |
if (!dsf_grid[i][j].nval)
|
| 236 |
|
|
continue;
|
| 237 |
|
|
if (!dsf_grid[i][j].crad)
|
| 238 |
greg |
2.11 |
break; /* shouldn't happen */
|
| 239 |
greg |
2.1 |
ovec_from_pos(ovec0, i, j);
|
| 240 |
|
|
maxang = 2.*R2ANG(dsf_grid[i][j].crad);
|
| 241 |
greg |
2.10 |
/* clamp near horizon */
|
| 242 |
|
|
if (maxang > output_orient*ovec0[2])
|
| 243 |
|
|
maxang = output_orient*ovec0[2];
|
| 244 |
greg |
2.1 |
r = maxang*(2.*GRIDRES/M_PI) + 1;
|
| 245 |
|
|
maxang2 = maxang*maxang;
|
| 246 |
|
|
for (ii = i-r; ii <= i+r; ii++) {
|
| 247 |
|
|
if (ii < 0) continue;
|
| 248 |
|
|
if (ii >= GRIDRES) break;
|
| 249 |
|
|
for (jj = j-r; jj <= j+r; jj++) {
|
| 250 |
greg |
2.9 |
if ((ii == i) & (jj == j))
|
| 251 |
|
|
continue; /* don't get self-absorbed */
|
| 252 |
greg |
2.1 |
if (jj < 0) continue;
|
| 253 |
|
|
if (jj >= GRIDRES) break;
|
| 254 |
|
|
if (!dsf_grid[ii][jj].nval)
|
| 255 |
|
|
continue;
|
| 256 |
|
|
ovec_from_pos(ovec1, ii, jj);
|
| 257 |
|
|
if (2. - 2.*DOT(ovec0,ovec1) >= maxang2)
|
| 258 |
|
|
continue;
|
| 259 |
|
|
/* absorb sum */
|
| 260 |
|
|
dsf_grid[i][j].vsum += dsf_grid[ii][jj].vsum;
|
| 261 |
|
|
dsf_grid[i][j].nval += dsf_grid[ii][jj].nval;
|
| 262 |
|
|
/* keep value, though */
|
| 263 |
|
|
dsf_grid[ii][jj].vsum /= (float)dsf_grid[ii][jj].nval;
|
| 264 |
|
|
dsf_grid[ii][jj].nval = 0;
|
| 265 |
|
|
}
|
| 266 |
|
|
}
|
| 267 |
greg |
2.11 |
}
|
| 268 |
greg |
2.1 |
/* final averaging pass */
|
| 269 |
|
|
for (i = 0; i < GRIDRES; i++)
|
| 270 |
|
|
for (j = 0; j < GRIDRES; j++)
|
| 271 |
|
|
if (dsf_grid[i][j].nval > 1) {
|
| 272 |
|
|
dsf_grid[i][j].vsum /= (float)dsf_grid[i][j].nval;
|
| 273 |
|
|
dsf_grid[i][j].nval = 1;
|
| 274 |
|
|
}
|
| 275 |
|
|
}
|
| 276 |
|
|
|
| 277 |
greg |
2.11 |
/* Compute minimum BSDF from histogram (does not clear) */
|
| 278 |
greg |
2.5 |
static void
|
| 279 |
|
|
comp_bsdf_min()
|
| 280 |
|
|
{
|
| 281 |
|
|
int cnt;
|
| 282 |
|
|
int i, target;
|
| 283 |
|
|
|
| 284 |
|
|
cnt = 0;
|
| 285 |
|
|
for (i = HISTLEN; i--; )
|
| 286 |
|
|
cnt += bsdf_hist[i];
|
| 287 |
|
|
if (!cnt) { /* shouldn't happen */
|
| 288 |
|
|
bsdf_min = 0;
|
| 289 |
|
|
return;
|
| 290 |
|
|
}
|
| 291 |
|
|
target = cnt/100; /* ignore bottom 1% */
|
| 292 |
|
|
cnt = 0;
|
| 293 |
|
|
for (i = 0; cnt <= target; i++)
|
| 294 |
|
|
cnt += bsdf_hist[i];
|
| 295 |
|
|
bsdf_min = histval(i-1);
|
| 296 |
|
|
}
|
| 297 |
|
|
|
| 298 |
greg |
2.6 |
/* Find n nearest sub-sampled neighbors to the given grid position */
|
| 299 |
|
|
static int
|
| 300 |
|
|
get_neighbors(int neigh[][2], int n, const int i, const int j)
|
| 301 |
|
|
{
|
| 302 |
|
|
int k = 0;
|
| 303 |
|
|
int r;
|
| 304 |
|
|
/* search concentric squares */
|
| 305 |
|
|
for (r = 1; r < GRIDRES; r++) {
|
| 306 |
|
|
int ii, jj;
|
| 307 |
|
|
for (ii = i-r; ii <= i+r; ii++) {
|
| 308 |
|
|
int jstep = 1;
|
| 309 |
|
|
if (ii < 0) continue;
|
| 310 |
|
|
if (ii >= GRIDRES) break;
|
| 311 |
|
|
if ((i-r < ii) & (ii < i+r))
|
| 312 |
|
|
jstep = r<<1;
|
| 313 |
|
|
for (jj = j-r; jj <= j+r; jj += jstep) {
|
| 314 |
|
|
if (jj < 0) continue;
|
| 315 |
|
|
if (jj >= GRIDRES) break;
|
| 316 |
|
|
if (dsf_grid[ii][jj].nval) {
|
| 317 |
|
|
neigh[k][0] = ii;
|
| 318 |
|
|
neigh[k][1] = jj;
|
| 319 |
|
|
if (++k >= n)
|
| 320 |
|
|
return(n);
|
| 321 |
|
|
}
|
| 322 |
|
|
}
|
| 323 |
|
|
}
|
| 324 |
|
|
}
|
| 325 |
|
|
return(k);
|
| 326 |
|
|
}
|
| 327 |
|
|
|
| 328 |
|
|
/* Adjust coded radius for the given grid position based on neighborhood */
|
| 329 |
|
|
static int
|
| 330 |
|
|
adj_coded_radius(const int i, const int j)
|
| 331 |
|
|
{
|
| 332 |
|
|
const double rad0 = R2ANG(dsf_grid[i][j].crad);
|
| 333 |
greg |
2.9 |
const double minrad = MINRSCA * rad0;
|
| 334 |
|
|
double currad = MAXRSCA * rad0;
|
| 335 |
greg |
2.7 |
int neigh[NNEIGH][2];
|
| 336 |
greg |
2.6 |
int n;
|
| 337 |
|
|
FVECT our_dir;
|
| 338 |
|
|
|
| 339 |
|
|
ovec_from_pos(our_dir, i, j);
|
| 340 |
greg |
2.7 |
n = get_neighbors(neigh, NNEIGH, i, j);
|
| 341 |
greg |
2.6 |
while (n--) {
|
| 342 |
|
|
FVECT their_dir;
|
| 343 |
|
|
double max_ratio, rad_ok2;
|
| 344 |
|
|
/* check our value at neighbor */
|
| 345 |
|
|
ovec_from_pos(their_dir, neigh[n][0], neigh[n][1]);
|
| 346 |
greg |
2.7 |
max_ratio = MAXFRAC * dsf_grid[neigh[n][0]][neigh[n][1]].vsum
|
| 347 |
greg |
2.6 |
/ dsf_grid[i][j].vsum;
|
| 348 |
|
|
if (max_ratio >= 1)
|
| 349 |
|
|
continue;
|
| 350 |
|
|
rad_ok2 = (DOT(their_dir,our_dir) - 1.)/log(max_ratio);
|
| 351 |
|
|
if (rad_ok2 >= currad*currad)
|
| 352 |
|
|
continue; /* value fraction OK */
|
| 353 |
|
|
currad = sqrt(rad_ok2); /* else reduce lobe radius */
|
| 354 |
greg |
2.9 |
if (currad <= minrad) /* limit how small we'll go */
|
| 355 |
|
|
return(ANG2R(minrad));
|
| 356 |
greg |
2.6 |
}
|
| 357 |
|
|
return(ANG2R(currad)); /* encode selected radius */
|
| 358 |
|
|
}
|
| 359 |
|
|
|
| 360 |
greg |
2.1 |
/* Count up filled nodes and build RBF representation from current grid */
|
| 361 |
|
|
RBFNODE *
|
| 362 |
|
|
make_rbfrep(void)
|
| 363 |
|
|
{
|
| 364 |
greg |
2.9 |
long cradsum = 0, ocradsum = 0;
|
| 365 |
greg |
2.1 |
int niter = 16;
|
| 366 |
|
|
double lastVar, thisVar = 100.;
|
| 367 |
|
|
int nn;
|
| 368 |
|
|
RBFNODE *newnode;
|
| 369 |
greg |
2.2 |
RBFVAL *itera;
|
| 370 |
greg |
2.1 |
int i, j;
|
| 371 |
greg |
2.9 |
|
| 372 |
|
|
#ifdef DEBUG
|
| 373 |
|
|
{
|
| 374 |
|
|
int maxcnt = 0, nempty = 0;
|
| 375 |
|
|
long cntsum = 0;
|
| 376 |
|
|
for (i = 0; i < GRIDRES; i++)
|
| 377 |
|
|
for (j = 0; j < GRIDRES; j++)
|
| 378 |
|
|
if (!dsf_grid[i][j].nval) {
|
| 379 |
|
|
++nempty;
|
| 380 |
|
|
} else {
|
| 381 |
|
|
if (dsf_grid[i][j].nval > maxcnt)
|
| 382 |
|
|
maxcnt = dsf_grid[i][j].nval;
|
| 383 |
|
|
cntsum += dsf_grid[i][j].nval;
|
| 384 |
|
|
}
|
| 385 |
|
|
fprintf(stderr, "Average, maximum bin count: %d, %d (%.1f%% empty)\n",
|
| 386 |
|
|
(int)(cntsum/((GRIDRES*GRIDRES)-nempty)), maxcnt,
|
| 387 |
|
|
100./(GRIDRES*GRIDRES)*nempty);
|
| 388 |
|
|
}
|
| 389 |
|
|
#endif
|
| 390 |
greg |
2.1 |
/* compute RBF radii */
|
| 391 |
|
|
compute_radii();
|
| 392 |
|
|
/* coagulate lobes */
|
| 393 |
|
|
cull_values();
|
| 394 |
|
|
nn = 0; /* count selected bins */
|
| 395 |
|
|
for (i = 0; i < GRIDRES; i++)
|
| 396 |
|
|
for (j = 0; j < GRIDRES; j++)
|
| 397 |
|
|
nn += dsf_grid[i][j].nval;
|
| 398 |
greg |
2.5 |
/* compute minimum BSDF */
|
| 399 |
|
|
comp_bsdf_min();
|
| 400 |
greg |
2.1 |
/* allocate RBF array */
|
| 401 |
|
|
newnode = (RBFNODE *)malloc(sizeof(RBFNODE) + sizeof(RBFVAL)*(nn-1));
|
| 402 |
greg |
2.2 |
if (newnode == NULL)
|
| 403 |
|
|
goto memerr;
|
| 404 |
greg |
2.1 |
newnode->ord = -1;
|
| 405 |
|
|
newnode->next = NULL;
|
| 406 |
|
|
newnode->ejl = NULL;
|
| 407 |
|
|
newnode->invec[2] = sin((M_PI/180.)*theta_in_deg);
|
| 408 |
|
|
newnode->invec[0] = cos((M_PI/180.)*phi_in_deg)*newnode->invec[2];
|
| 409 |
|
|
newnode->invec[1] = sin((M_PI/180.)*phi_in_deg)*newnode->invec[2];
|
| 410 |
|
|
newnode->invec[2] = input_orient*sqrt(1. - newnode->invec[2]*newnode->invec[2]);
|
| 411 |
|
|
newnode->vtotal = 0;
|
| 412 |
|
|
newnode->nrbf = nn;
|
| 413 |
|
|
nn = 0; /* fill RBF array */
|
| 414 |
|
|
for (i = 0; i < GRIDRES; i++)
|
| 415 |
|
|
for (j = 0; j < GRIDRES; j++)
|
| 416 |
|
|
if (dsf_grid[i][j].nval) {
|
| 417 |
|
|
newnode->rbfa[nn].peak = dsf_grid[i][j].vsum;
|
| 418 |
greg |
2.9 |
ocradsum += dsf_grid[i][j].crad;
|
| 419 |
|
|
cradsum +=
|
| 420 |
greg |
2.6 |
newnode->rbfa[nn].crad = adj_coded_radius(i, j);
|
| 421 |
greg |
2.1 |
newnode->rbfa[nn].gx = i;
|
| 422 |
|
|
newnode->rbfa[nn].gy = j;
|
| 423 |
|
|
++nn;
|
| 424 |
|
|
}
|
| 425 |
greg |
2.9 |
#ifdef DEBUG
|
| 426 |
|
|
fprintf(stderr,
|
| 427 |
|
|
"Average radius reduced from %.2f to %.2f degrees for %d lobes\n",
|
| 428 |
|
|
180./M_PI*MAXRSCA*R2ANG(ocradsum/newnode->nrbf),
|
| 429 |
|
|
180./M_PI*R2ANG(cradsum/newnode->nrbf), newnode->nrbf);
|
| 430 |
|
|
#endif
|
| 431 |
greg |
2.1 |
/* iterate to improve interpolation accuracy */
|
| 432 |
greg |
2.2 |
itera = (RBFVAL *)malloc(sizeof(RBFVAL)*newnode->nrbf);
|
| 433 |
|
|
if (itera == NULL)
|
| 434 |
|
|
goto memerr;
|
| 435 |
|
|
memcpy(itera, newnode->rbfa, sizeof(RBFVAL)*newnode->nrbf);
|
| 436 |
greg |
2.1 |
do {
|
| 437 |
|
|
double dsum = 0, dsum2 = 0;
|
| 438 |
|
|
nn = 0;
|
| 439 |
|
|
for (i = 0; i < GRIDRES; i++)
|
| 440 |
|
|
for (j = 0; j < GRIDRES; j++)
|
| 441 |
|
|
if (dsf_grid[i][j].nval) {
|
| 442 |
|
|
FVECT odir;
|
| 443 |
|
|
double corr;
|
| 444 |
|
|
ovec_from_pos(odir, i, j);
|
| 445 |
greg |
2.2 |
itera[nn++].peak *= corr =
|
| 446 |
greg |
2.1 |
dsf_grid[i][j].vsum /
|
| 447 |
|
|
eval_rbfrep(newnode, odir);
|
| 448 |
greg |
2.2 |
dsum += 1. - corr;
|
| 449 |
|
|
dsum2 += (1.-corr)*(1.-corr);
|
| 450 |
greg |
2.1 |
}
|
| 451 |
greg |
2.2 |
memcpy(newnode->rbfa, itera, sizeof(RBFVAL)*newnode->nrbf);
|
| 452 |
greg |
2.1 |
lastVar = thisVar;
|
| 453 |
|
|
thisVar = dsum2/(double)nn;
|
| 454 |
|
|
#ifdef DEBUG
|
| 455 |
|
|
fprintf(stderr, "Avg., RMS error: %.1f%% %.1f%%\n",
|
| 456 |
|
|
100.*dsum/(double)nn,
|
| 457 |
|
|
100.*sqrt(thisVar));
|
| 458 |
|
|
#endif
|
| 459 |
|
|
} while (--niter > 0 && lastVar-thisVar > 0.02*lastVar);
|
| 460 |
|
|
|
| 461 |
greg |
2.2 |
free(itera);
|
| 462 |
greg |
2.1 |
nn = 0; /* compute sum for normalization */
|
| 463 |
|
|
while (nn < newnode->nrbf)
|
| 464 |
|
|
newnode->vtotal += rbf_volume(&newnode->rbfa[nn++]);
|
| 465 |
greg |
2.3 |
#ifdef DEBUG
|
| 466 |
|
|
fprintf(stderr, "Integrated DSF at (%.1f,%.1f) deg. is %.2f\n",
|
| 467 |
|
|
get_theta180(newnode->invec), get_phi360(newnode->invec),
|
| 468 |
|
|
newnode->vtotal);
|
| 469 |
|
|
#endif
|
| 470 |
greg |
2.1 |
insert_dsf(newnode);
|
| 471 |
|
|
|
| 472 |
|
|
return(newnode);
|
| 473 |
greg |
2.2 |
memerr:
|
| 474 |
|
|
fprintf(stderr, "%s: Out of memory in make_rbfrep()\n", progname);
|
| 475 |
|
|
exit(1);
|
| 476 |
greg |
2.1 |
}
|
