| 1 |
greg |
2.1 |
#ifndef lint
|
| 2 |
greg |
2.9 |
static const char RCSid[] = "$Id: bsdfrep.c,v 2.8 2012/11/09 02:16:29 greg Exp $";
|
| 3 |
greg |
2.1 |
#endif
|
| 4 |
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/*
|
| 5 |
|
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* Support BSDF representation as radial basis functions.
|
| 6 |
|
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*
|
| 7 |
|
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* G. Ward
|
| 8 |
|
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*/
|
| 9 |
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|
| 10 |
|
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#define _USE_MATH_DEFINES
|
| 11 |
|
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#include <stdlib.h>
|
| 12 |
greg |
2.2 |
#include <string.h>
|
| 13 |
greg |
2.1 |
#include <math.h>
|
| 14 |
|
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#include "rtio.h"
|
| 15 |
|
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#include "resolu.h"
|
| 16 |
|
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#include "bsdfrep.h"
|
| 17 |
greg |
2.5 |
/* active grid resolution */
|
| 18 |
|
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int grid_res = GRIDRES;
|
| 19 |
|
|
|
| 20 |
greg |
2.4 |
/* coverage/symmetry using INP_QUAD? flags */
|
| 21 |
greg |
2.1 |
int inp_coverage = 0;
|
| 22 |
|
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/* all incident angles in-plane so far? */
|
| 23 |
|
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int single_plane_incident = -1;
|
| 24 |
|
|
|
| 25 |
|
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/* input/output orientations */
|
| 26 |
|
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int input_orient = 0;
|
| 27 |
|
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int output_orient = 0;
|
| 28 |
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|
| 29 |
|
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/* processed incident DSF measurements */
|
| 30 |
|
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RBFNODE *dsf_list = NULL;
|
| 31 |
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|
| 32 |
|
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/* RBF-linking matrices (edges) */
|
| 33 |
|
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MIGRATION *mig_list = NULL;
|
| 34 |
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|
| 35 |
|
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/* current input direction */
|
| 36 |
|
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double theta_in_deg, phi_in_deg;
|
| 37 |
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|
| 38 |
|
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/* Register new input direction */
|
| 39 |
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int
|
| 40 |
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new_input_direction(double new_theta, double new_phi)
|
| 41 |
|
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{
|
| 42 |
|
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if (!input_orient) /* check input orientation */
|
| 43 |
|
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input_orient = 1 - 2*(new_theta > 90.);
|
| 44 |
|
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else if (input_orient > 0 ^ new_theta < 90.) {
|
| 45 |
|
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fprintf(stderr,
|
| 46 |
|
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"%s: Cannot handle input angles on both sides of surface\n",
|
| 47 |
|
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progname);
|
| 48 |
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return(0);
|
| 49 |
|
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}
|
| 50 |
|
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/* normalize angle ranges */
|
| 51 |
|
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while (new_theta < -180.)
|
| 52 |
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new_theta += 360.;
|
| 53 |
|
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while (new_theta > 180.)
|
| 54 |
|
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new_theta -= 360.;
|
| 55 |
|
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if (new_theta < 0) {
|
| 56 |
|
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new_theta = -new_theta;
|
| 57 |
|
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new_phi += 180.;
|
| 58 |
|
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}
|
| 59 |
greg |
2.6 |
if ((theta_in_deg = new_theta) < 1.0)
|
| 60 |
|
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return(1); /* don't rely on phi near normal */
|
| 61 |
greg |
2.1 |
while (new_phi < 0)
|
| 62 |
|
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new_phi += 360.;
|
| 63 |
|
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while (new_phi >= 360.)
|
| 64 |
|
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new_phi -= 360.;
|
| 65 |
|
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if (single_plane_incident > 0) /* check input coverage */
|
| 66 |
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single_plane_incident = (round(new_phi) == round(phi_in_deg));
|
| 67 |
|
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else if (single_plane_incident < 0)
|
| 68 |
|
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single_plane_incident = 1;
|
| 69 |
|
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phi_in_deg = new_phi;
|
| 70 |
|
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if ((1. < new_phi) & (new_phi < 89.))
|
| 71 |
|
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inp_coverage |= INP_QUAD1;
|
| 72 |
|
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else if ((91. < new_phi) & (new_phi < 179.))
|
| 73 |
|
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inp_coverage |= INP_QUAD2;
|
| 74 |
|
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else if ((181. < new_phi) & (new_phi < 269.))
|
| 75 |
|
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inp_coverage |= INP_QUAD3;
|
| 76 |
|
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else if ((271. < new_phi) & (new_phi < 359.))
|
| 77 |
|
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inp_coverage |= INP_QUAD4;
|
| 78 |
|
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return(1);
|
| 79 |
|
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}
|
| 80 |
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|
| 81 |
|
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/* Apply symmetry to the given vector based on distribution */
|
| 82 |
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int
|
| 83 |
|
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use_symmetry(FVECT vec)
|
| 84 |
|
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{
|
| 85 |
|
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double phi = get_phi360(vec);
|
| 86 |
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|
| 87 |
|
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switch (inp_coverage) {
|
| 88 |
|
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case INP_QUAD1|INP_QUAD2|INP_QUAD3|INP_QUAD4:
|
| 89 |
|
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break;
|
| 90 |
|
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case INP_QUAD1|INP_QUAD2:
|
| 91 |
|
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if ((-FTINY > phi) | (phi > 180.+FTINY))
|
| 92 |
|
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goto mir_y;
|
| 93 |
|
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break;
|
| 94 |
|
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case INP_QUAD2|INP_QUAD3:
|
| 95 |
|
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if ((90.-FTINY > phi) | (phi > 270.+FTINY))
|
| 96 |
|
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goto mir_x;
|
| 97 |
|
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break;
|
| 98 |
|
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case INP_QUAD3|INP_QUAD4:
|
| 99 |
|
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if ((180.-FTINY > phi) | (phi > 360.+FTINY))
|
| 100 |
|
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goto mir_y;
|
| 101 |
|
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break;
|
| 102 |
|
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case INP_QUAD4|INP_QUAD1:
|
| 103 |
|
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if ((270.-FTINY > phi) & (phi > 90.+FTINY))
|
| 104 |
|
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goto mir_x;
|
| 105 |
|
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break;
|
| 106 |
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case INP_QUAD1:
|
| 107 |
|
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if ((-FTINY > phi) | (phi > 90.+FTINY))
|
| 108 |
|
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switch ((int)(phi*(1./90.))) {
|
| 109 |
|
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case 1: goto mir_x;
|
| 110 |
|
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case 2: goto mir_xy;
|
| 111 |
|
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case 3: goto mir_y;
|
| 112 |
|
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}
|
| 113 |
|
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break;
|
| 114 |
|
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case INP_QUAD2:
|
| 115 |
|
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if ((90.-FTINY > phi) | (phi > 180.+FTINY))
|
| 116 |
|
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switch ((int)(phi*(1./90.))) {
|
| 117 |
|
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case 0: goto mir_x;
|
| 118 |
|
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case 2: goto mir_y;
|
| 119 |
|
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case 3: goto mir_xy;
|
| 120 |
|
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}
|
| 121 |
|
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break;
|
| 122 |
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case INP_QUAD3:
|
| 123 |
|
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if ((180.-FTINY > phi) | (phi > 270.+FTINY))
|
| 124 |
|
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switch ((int)(phi*(1./90.))) {
|
| 125 |
|
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case 0: goto mir_xy;
|
| 126 |
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case 1: goto mir_y;
|
| 127 |
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case 3: goto mir_x;
|
| 128 |
|
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}
|
| 129 |
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break;
|
| 130 |
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case INP_QUAD4:
|
| 131 |
|
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if ((270.-FTINY > phi) | (phi > 360.+FTINY))
|
| 132 |
|
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switch ((int)(phi*(1./90.))) {
|
| 133 |
|
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case 0: goto mir_y;
|
| 134 |
|
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case 1: goto mir_xy;
|
| 135 |
|
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case 2: goto mir_x;
|
| 136 |
|
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}
|
| 137 |
|
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break;
|
| 138 |
|
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default:
|
| 139 |
|
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fprintf(stderr, "%s: Illegal input coverage (%d)\n",
|
| 140 |
|
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progname, inp_coverage);
|
| 141 |
|
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exit(1);
|
| 142 |
|
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}
|
| 143 |
|
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return(0); /* in range */
|
| 144 |
|
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mir_x:
|
| 145 |
|
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vec[0] = -vec[0];
|
| 146 |
|
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return(MIRROR_X);
|
| 147 |
|
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mir_y:
|
| 148 |
|
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vec[1] = -vec[1];
|
| 149 |
|
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return(MIRROR_Y);
|
| 150 |
|
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mir_xy:
|
| 151 |
|
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vec[0] = -vec[0];
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| 152 |
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vec[1] = -vec[1];
|
| 153 |
|
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return(MIRROR_X|MIRROR_Y);
|
| 154 |
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}
|
| 155 |
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| 156 |
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/* Reverse symmetry based on what was done before */
|
| 157 |
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void
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| 158 |
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rev_symmetry(FVECT vec, int sym)
|
| 159 |
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{
|
| 160 |
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if (sym & MIRROR_X)
|
| 161 |
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vec[0] = -vec[0];
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| 162 |
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if (sym & MIRROR_Y)
|
| 163 |
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vec[1] = -vec[1];
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| 164 |
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}
|
| 165 |
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|
| 166 |
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/* Reverse symmetry for an RBF distribution */
|
| 167 |
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void
|
| 168 |
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rev_rbf_symmetry(RBFNODE *rbf, int sym)
|
| 169 |
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{
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| 170 |
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int n;
|
| 171 |
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| 172 |
|
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rev_symmetry(rbf->invec, sym);
|
| 173 |
|
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if (sym & MIRROR_X)
|
| 174 |
|
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for (n = rbf->nrbf; n-- > 0; )
|
| 175 |
greg |
2.5 |
rbf->rbfa[n].gx = grid_res-1 - rbf->rbfa[n].gx;
|
| 176 |
greg |
2.1 |
if (sym & MIRROR_Y)
|
| 177 |
|
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for (n = rbf->nrbf; n-- > 0; )
|
| 178 |
greg |
2.5 |
rbf->rbfa[n].gy = grid_res-1 - rbf->rbfa[n].gy;
|
| 179 |
greg |
2.1 |
}
|
| 180 |
|
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|
| 181 |
greg |
2.6 |
/* Rotate RBF to correspond to given incident vector */
|
| 182 |
|
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void
|
| 183 |
|
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rotate_rbf(RBFNODE *rbf, const FVECT invec)
|
| 184 |
|
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{
|
| 185 |
|
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static const FVECT vnorm = {.0, .0, 1.};
|
| 186 |
|
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const double phi = atan2(invec[1],invec[0]) -
|
| 187 |
|
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atan2(rbf->invec[1],rbf->invec[0]);
|
| 188 |
|
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FVECT outvec;
|
| 189 |
|
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int pos[2];
|
| 190 |
|
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int n;
|
| 191 |
greg |
2.8 |
|
| 192 |
greg |
2.6 |
for (n = rbf->nrbf; n-- > 0; ) {
|
| 193 |
|
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ovec_from_pos(outvec, rbf->rbfa[n].gx, rbf->rbfa[n].gy);
|
| 194 |
|
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spinvector(outvec, outvec, vnorm, phi);
|
| 195 |
|
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pos_from_vec(pos, outvec);
|
| 196 |
|
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rbf->rbfa[n].gx = pos[0];
|
| 197 |
|
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rbf->rbfa[n].gy = pos[1];
|
| 198 |
|
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}
|
| 199 |
|
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VCOPY(rbf->invec, invec);
|
| 200 |
|
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}
|
| 201 |
|
|
|
| 202 |
greg |
2.1 |
/* Compute volume associated with Gaussian lobe */
|
| 203 |
|
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double
|
| 204 |
|
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rbf_volume(const RBFVAL *rbfp)
|
| 205 |
|
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{
|
| 206 |
|
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double rad = R2ANG(rbfp->crad);
|
| 207 |
|
|
|
| 208 |
|
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return((2.*M_PI) * rbfp->peak * rad*rad);
|
| 209 |
|
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}
|
| 210 |
|
|
|
| 211 |
|
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/* Compute outgoing vector from grid position */
|
| 212 |
|
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void
|
| 213 |
|
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ovec_from_pos(FVECT vec, int xpos, int ypos)
|
| 214 |
|
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{
|
| 215 |
|
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double uv[2];
|
| 216 |
|
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double r2;
|
| 217 |
|
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|
| 218 |
greg |
2.8 |
SDsquare2disk(uv, (xpos+.5)/grid_res, (ypos+.5)/grid_res);
|
| 219 |
greg |
2.1 |
/* uniform hemispherical projection */
|
| 220 |
|
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r2 = uv[0]*uv[0] + uv[1]*uv[1];
|
| 221 |
|
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vec[0] = vec[1] = sqrt(2. - r2);
|
| 222 |
|
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vec[0] *= uv[0];
|
| 223 |
|
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vec[1] *= uv[1];
|
| 224 |
|
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vec[2] = output_orient*(1. - r2);
|
| 225 |
|
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}
|
| 226 |
|
|
|
| 227 |
|
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/* Compute grid position from normalized input/output vector */
|
| 228 |
|
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void
|
| 229 |
|
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pos_from_vec(int pos[2], const FVECT vec)
|
| 230 |
|
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{
|
| 231 |
|
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double sq[2]; /* uniform hemispherical projection */
|
| 232 |
|
|
double norm = 1./sqrt(1. + fabs(vec[2]));
|
| 233 |
|
|
|
| 234 |
|
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SDdisk2square(sq, vec[0]*norm, vec[1]*norm);
|
| 235 |
|
|
|
| 236 |
greg |
2.5 |
pos[0] = (int)(sq[0]*grid_res);
|
| 237 |
|
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pos[1] = (int)(sq[1]*grid_res);
|
| 238 |
greg |
2.1 |
}
|
| 239 |
|
|
|
| 240 |
|
|
/* Evaluate RBF for DSF at the given normalized outgoing direction */
|
| 241 |
|
|
double
|
| 242 |
|
|
eval_rbfrep(const RBFNODE *rp, const FVECT outvec)
|
| 243 |
|
|
{
|
| 244 |
greg |
2.8 |
double res = 0;
|
| 245 |
greg |
2.1 |
const RBFVAL *rbfp;
|
| 246 |
|
|
FVECT odir;
|
| 247 |
|
|
double sig2;
|
| 248 |
|
|
int n;
|
| 249 |
|
|
|
| 250 |
|
|
if (rp == NULL)
|
| 251 |
|
|
return(.0);
|
| 252 |
|
|
rbfp = rp->rbfa;
|
| 253 |
|
|
for (n = rp->nrbf; n--; rbfp++) {
|
| 254 |
|
|
ovec_from_pos(odir, rbfp->gx, rbfp->gy);
|
| 255 |
|
|
sig2 = R2ANG(rbfp->crad);
|
| 256 |
|
|
sig2 = (DOT(odir,outvec) - 1.) / (sig2*sig2);
|
| 257 |
|
|
if (sig2 > -19.)
|
| 258 |
|
|
res += rbfp->peak * exp(sig2);
|
| 259 |
|
|
}
|
| 260 |
|
|
return(res);
|
| 261 |
|
|
}
|
| 262 |
|
|
|
| 263 |
|
|
/* Insert a new directional scattering function in our global list */
|
| 264 |
|
|
int
|
| 265 |
|
|
insert_dsf(RBFNODE *newrbf)
|
| 266 |
|
|
{
|
| 267 |
|
|
RBFNODE *rbf, *rbf_last;
|
| 268 |
|
|
int pos;
|
| 269 |
|
|
/* check for redundant meas. */
|
| 270 |
|
|
for (rbf = dsf_list; rbf != NULL; rbf = rbf->next)
|
| 271 |
|
|
if (DOT(rbf->invec, newrbf->invec) >= 1.-FTINY) {
|
| 272 |
|
|
fprintf(stderr,
|
| 273 |
|
|
"%s: Duplicate incident measurement (ignored)\n",
|
| 274 |
|
|
progname);
|
| 275 |
|
|
free(newrbf);
|
| 276 |
|
|
return(-1);
|
| 277 |
|
|
}
|
| 278 |
|
|
/* keep in ascending theta order */
|
| 279 |
|
|
for (rbf_last = NULL, rbf = dsf_list; rbf != NULL;
|
| 280 |
|
|
rbf_last = rbf, rbf = rbf->next)
|
| 281 |
|
|
if (single_plane_incident && input_orient*rbf->invec[2] <
|
| 282 |
|
|
input_orient*newrbf->invec[2])
|
| 283 |
|
|
break;
|
| 284 |
|
|
if (rbf_last == NULL) { /* insert new node in list */
|
| 285 |
|
|
newrbf->ord = 0;
|
| 286 |
|
|
newrbf->next = dsf_list;
|
| 287 |
|
|
dsf_list = newrbf;
|
| 288 |
|
|
} else {
|
| 289 |
|
|
newrbf->ord = rbf_last->ord + 1;
|
| 290 |
|
|
newrbf->next = rbf;
|
| 291 |
|
|
rbf_last->next = newrbf;
|
| 292 |
|
|
}
|
| 293 |
|
|
rbf_last = newrbf;
|
| 294 |
|
|
while (rbf != NULL) { /* update ordinal positions */
|
| 295 |
|
|
rbf->ord = rbf_last->ord + 1;
|
| 296 |
|
|
rbf_last = rbf;
|
| 297 |
|
|
rbf = rbf->next;
|
| 298 |
|
|
}
|
| 299 |
|
|
return(newrbf->ord);
|
| 300 |
|
|
}
|
| 301 |
|
|
|
| 302 |
|
|
/* Get the DSF indicated by its ordinal position */
|
| 303 |
|
|
RBFNODE *
|
| 304 |
|
|
get_dsf(int ord)
|
| 305 |
|
|
{
|
| 306 |
|
|
RBFNODE *rbf;
|
| 307 |
|
|
|
| 308 |
|
|
for (rbf = dsf_list; rbf != NULL; rbf = rbf->next)
|
| 309 |
greg |
2.3 |
if (rbf->ord == ord)
|
| 310 |
greg |
2.1 |
return(rbf);
|
| 311 |
|
|
return(NULL);
|
| 312 |
|
|
}
|
| 313 |
|
|
|
| 314 |
|
|
/* Get triangle surface orientation (unnormalized) */
|
| 315 |
|
|
void
|
| 316 |
|
|
tri_orient(FVECT vres, const FVECT v1, const FVECT v2, const FVECT v3)
|
| 317 |
|
|
{
|
| 318 |
|
|
FVECT v2minus1, v3minus2;
|
| 319 |
|
|
|
| 320 |
|
|
VSUB(v2minus1, v2, v1);
|
| 321 |
|
|
VSUB(v3minus2, v3, v2);
|
| 322 |
|
|
VCROSS(vres, v2minus1, v3minus2);
|
| 323 |
|
|
}
|
| 324 |
|
|
|
| 325 |
|
|
/* Determine if vertex order is reversed (inward normal) */
|
| 326 |
|
|
int
|
| 327 |
|
|
is_rev_tri(const FVECT v1, const FVECT v2, const FVECT v3)
|
| 328 |
|
|
{
|
| 329 |
|
|
FVECT tor;
|
| 330 |
|
|
|
| 331 |
|
|
tri_orient(tor, v1, v2, v3);
|
| 332 |
|
|
|
| 333 |
|
|
return(DOT(tor, v2) < 0.);
|
| 334 |
|
|
}
|
| 335 |
|
|
|
| 336 |
|
|
/* Find vertices completing triangles on either side of the given edge */
|
| 337 |
|
|
int
|
| 338 |
|
|
get_triangles(RBFNODE *rbfv[2], const MIGRATION *mig)
|
| 339 |
|
|
{
|
| 340 |
greg |
2.4 |
const MIGRATION *ej1, *ej2;
|
| 341 |
greg |
2.1 |
RBFNODE *tv;
|
| 342 |
|
|
|
| 343 |
|
|
rbfv[0] = rbfv[1] = NULL;
|
| 344 |
|
|
if (mig == NULL)
|
| 345 |
|
|
return(0);
|
| 346 |
greg |
2.4 |
for (ej1 = mig->rbfv[0]->ejl; ej1 != NULL;
|
| 347 |
|
|
ej1 = nextedge(mig->rbfv[0],ej1)) {
|
| 348 |
|
|
if (ej1 == mig)
|
| 349 |
greg |
2.1 |
continue;
|
| 350 |
greg |
2.4 |
tv = opp_rbf(mig->rbfv[0],ej1);
|
| 351 |
greg |
2.1 |
for (ej2 = tv->ejl; ej2 != NULL; ej2 = nextedge(tv,ej2))
|
| 352 |
|
|
if (opp_rbf(tv,ej2) == mig->rbfv[1]) {
|
| 353 |
|
|
rbfv[is_rev_tri(mig->rbfv[0]->invec,
|
| 354 |
|
|
mig->rbfv[1]->invec,
|
| 355 |
|
|
tv->invec)] = tv;
|
| 356 |
|
|
break;
|
| 357 |
|
|
}
|
| 358 |
|
|
}
|
| 359 |
|
|
return((rbfv[0] != NULL) + (rbfv[1] != NULL));
|
| 360 |
|
|
}
|
| 361 |
|
|
|
| 362 |
greg |
2.4 |
/* Clear our BSDF representation and free memory */
|
| 363 |
|
|
void
|
| 364 |
|
|
clear_bsdf_rep(void)
|
| 365 |
|
|
{
|
| 366 |
|
|
while (mig_list != NULL) {
|
| 367 |
|
|
MIGRATION *mig = mig_list;
|
| 368 |
|
|
mig_list = mig->next;
|
| 369 |
|
|
free(mig);
|
| 370 |
|
|
}
|
| 371 |
|
|
while (dsf_list != NULL) {
|
| 372 |
|
|
RBFNODE *rbf = dsf_list;
|
| 373 |
|
|
dsf_list = rbf->next;
|
| 374 |
|
|
free(rbf);
|
| 375 |
|
|
}
|
| 376 |
|
|
inp_coverage = 0;
|
| 377 |
|
|
single_plane_incident = -1;
|
| 378 |
|
|
input_orient = output_orient = 0;
|
| 379 |
greg |
2.5 |
grid_res = GRIDRES;
|
| 380 |
greg |
2.4 |
}
|
| 381 |
|
|
|
| 382 |
greg |
2.1 |
/* Write our BSDF mesh interpolant out to the given binary stream */
|
| 383 |
|
|
void
|
| 384 |
|
|
save_bsdf_rep(FILE *ofp)
|
| 385 |
|
|
{
|
| 386 |
|
|
RBFNODE *rbf;
|
| 387 |
|
|
MIGRATION *mig;
|
| 388 |
|
|
int i, n;
|
| 389 |
|
|
/* finish header */
|
| 390 |
greg |
2.2 |
fprintf(ofp, "SYMMETRY=%d\n", !single_plane_incident * inp_coverage);
|
| 391 |
|
|
fprintf(ofp, "IO_SIDES= %d %d\n", input_orient, output_orient);
|
| 392 |
greg |
2.5 |
fprintf(ofp, "GRIDRES=%d\n", grid_res);
|
| 393 |
greg |
2.1 |
fputformat(BSDFREP_FMT, ofp);
|
| 394 |
|
|
fputc('\n', ofp);
|
| 395 |
|
|
/* write each DSF */
|
| 396 |
|
|
for (rbf = dsf_list; rbf != NULL; rbf = rbf->next) {
|
| 397 |
|
|
putint(rbf->ord, 4, ofp);
|
| 398 |
|
|
putflt(rbf->invec[0], ofp);
|
| 399 |
|
|
putflt(rbf->invec[1], ofp);
|
| 400 |
|
|
putflt(rbf->invec[2], ofp);
|
| 401 |
|
|
putflt(rbf->vtotal, ofp);
|
| 402 |
|
|
putint(rbf->nrbf, 4, ofp);
|
| 403 |
|
|
for (i = 0; i < rbf->nrbf; i++) {
|
| 404 |
|
|
putflt(rbf->rbfa[i].peak, ofp);
|
| 405 |
|
|
putint(rbf->rbfa[i].crad, 2, ofp);
|
| 406 |
|
|
putint(rbf->rbfa[i].gx, 1, ofp);
|
| 407 |
|
|
putint(rbf->rbfa[i].gy, 1, ofp);
|
| 408 |
|
|
}
|
| 409 |
|
|
}
|
| 410 |
|
|
putint(-1, 4, ofp); /* terminator */
|
| 411 |
|
|
/* write each migration matrix */
|
| 412 |
greg |
2.2 |
for (mig = mig_list; mig != NULL; mig = mig->next) {
|
| 413 |
|
|
int zerocnt = 0;
|
| 414 |
greg |
2.1 |
putint(mig->rbfv[0]->ord, 4, ofp);
|
| 415 |
|
|
putint(mig->rbfv[1]->ord, 4, ofp);
|
| 416 |
greg |
2.2 |
/* write out as sparse data */
|
| 417 |
greg |
2.1 |
n = mtx_nrows(mig) * mtx_ncols(mig);
|
| 418 |
greg |
2.2 |
for (i = 0; i < n; i++) {
|
| 419 |
greg |
2.3 |
if (zerocnt == 0xff) {
|
| 420 |
|
|
putint(0xff, 1, ofp); zerocnt = 0;
|
| 421 |
greg |
2.2 |
}
|
| 422 |
|
|
if (mig->mtx[i] != 0) {
|
| 423 |
|
|
putint(zerocnt, 1, ofp); zerocnt = 0;
|
| 424 |
|
|
putflt(mig->mtx[i], ofp);
|
| 425 |
|
|
} else
|
| 426 |
|
|
++zerocnt;
|
| 427 |
|
|
}
|
| 428 |
|
|
putint(zerocnt, 1, ofp);
|
| 429 |
greg |
2.1 |
}
|
| 430 |
|
|
putint(-1, 4, ofp); /* terminator */
|
| 431 |
|
|
putint(-1, 4, ofp);
|
| 432 |
|
|
if (fflush(ofp) == EOF) {
|
| 433 |
|
|
fprintf(stderr, "%s: error writing BSDF interpolant\n",
|
| 434 |
|
|
progname);
|
| 435 |
|
|
exit(1);
|
| 436 |
|
|
}
|
| 437 |
|
|
}
|
| 438 |
|
|
|
| 439 |
greg |
2.2 |
/* Check header line for critical information */
|
| 440 |
|
|
static int
|
| 441 |
|
|
headline(char *s, void *p)
|
| 442 |
|
|
{
|
| 443 |
|
|
char fmt[32];
|
| 444 |
|
|
|
| 445 |
|
|
if (!strncmp(s, "SYMMETRY=", 9)) {
|
| 446 |
|
|
inp_coverage = atoi(s+9);
|
| 447 |
|
|
single_plane_incident = !inp_coverage;
|
| 448 |
|
|
return(0);
|
| 449 |
|
|
}
|
| 450 |
|
|
if (!strncmp(s, "IO_SIDES=", 9)) {
|
| 451 |
|
|
sscanf(s+9, "%d %d", &input_orient, &output_orient);
|
| 452 |
|
|
return(0);
|
| 453 |
|
|
}
|
| 454 |
greg |
2.5 |
if (!strncmp(s, "GRIDRES=", 8)) {
|
| 455 |
|
|
sscanf(s+8, "%d", &grid_res);
|
| 456 |
|
|
return(0);
|
| 457 |
|
|
}
|
| 458 |
greg |
2.2 |
if (formatval(fmt, s) && strcmp(fmt, BSDFREP_FMT))
|
| 459 |
|
|
return(-1);
|
| 460 |
|
|
return(0);
|
| 461 |
|
|
}
|
| 462 |
|
|
|
| 463 |
greg |
2.1 |
/* Read a BSDF mesh interpolant from the given binary stream */
|
| 464 |
|
|
int
|
| 465 |
|
|
load_bsdf_rep(FILE *ifp)
|
| 466 |
|
|
{
|
| 467 |
|
|
RBFNODE rbfh;
|
| 468 |
|
|
int from_ord, to_ord;
|
| 469 |
|
|
int i;
|
| 470 |
greg |
2.4 |
|
| 471 |
|
|
clear_bsdf_rep();
|
| 472 |
greg |
2.5 |
if (ifp == NULL)
|
| 473 |
|
|
return(0);
|
| 474 |
greg |
2.2 |
if (getheader(ifp, headline, NULL) < 0 || single_plane_incident < 0 |
|
| 475 |
|
|
!input_orient | !output_orient) {
|
| 476 |
greg |
2.1 |
fprintf(stderr, "%s: missing/bad format for BSDF interpolant\n",
|
| 477 |
|
|
progname);
|
| 478 |
|
|
return(0);
|
| 479 |
|
|
}
|
| 480 |
|
|
rbfh.next = NULL; /* read each DSF */
|
| 481 |
|
|
rbfh.ejl = NULL;
|
| 482 |
|
|
while ((rbfh.ord = getint(4, ifp)) >= 0) {
|
| 483 |
|
|
RBFNODE *newrbf;
|
| 484 |
|
|
|
| 485 |
|
|
rbfh.invec[0] = getflt(ifp);
|
| 486 |
|
|
rbfh.invec[1] = getflt(ifp);
|
| 487 |
|
|
rbfh.invec[2] = getflt(ifp);
|
| 488 |
greg |
2.9 |
if (normalize(rbfh.invec) == 0) {
|
| 489 |
|
|
fprintf(stderr, "%s: zero incident vector\n", progname);
|
| 490 |
|
|
return(0);
|
| 491 |
|
|
}
|
| 492 |
greg |
2.3 |
rbfh.vtotal = getflt(ifp);
|
| 493 |
greg |
2.1 |
rbfh.nrbf = getint(4, ifp);
|
| 494 |
|
|
newrbf = (RBFNODE *)malloc(sizeof(RBFNODE) +
|
| 495 |
|
|
sizeof(RBFVAL)*(rbfh.nrbf-1));
|
| 496 |
|
|
if (newrbf == NULL)
|
| 497 |
|
|
goto memerr;
|
| 498 |
greg |
2.8 |
memcpy(newrbf, &rbfh, sizeof(RBFNODE)-sizeof(RBFVAL));
|
| 499 |
greg |
2.1 |
for (i = 0; i < rbfh.nrbf; i++) {
|
| 500 |
|
|
newrbf->rbfa[i].peak = getflt(ifp);
|
| 501 |
|
|
newrbf->rbfa[i].crad = getint(2, ifp) & 0xffff;
|
| 502 |
|
|
newrbf->rbfa[i].gx = getint(1, ifp) & 0xff;
|
| 503 |
|
|
newrbf->rbfa[i].gy = getint(1, ifp) & 0xff;
|
| 504 |
|
|
}
|
| 505 |
|
|
if (feof(ifp))
|
| 506 |
|
|
goto badEOF;
|
| 507 |
|
|
/* insert in global list */
|
| 508 |
|
|
if (insert_dsf(newrbf) != rbfh.ord) {
|
| 509 |
|
|
fprintf(stderr, "%s: error adding DSF\n", progname);
|
| 510 |
|
|
return(0);
|
| 511 |
|
|
}
|
| 512 |
|
|
}
|
| 513 |
|
|
/* read each migration matrix */
|
| 514 |
|
|
while ((from_ord = getint(4, ifp)) >= 0 &&
|
| 515 |
|
|
(to_ord = getint(4, ifp)) >= 0) {
|
| 516 |
|
|
RBFNODE *from_rbf = get_dsf(from_ord);
|
| 517 |
|
|
RBFNODE *to_rbf = get_dsf(to_ord);
|
| 518 |
|
|
MIGRATION *newmig;
|
| 519 |
|
|
int n;
|
| 520 |
|
|
|
| 521 |
|
|
if ((from_rbf == NULL) | (to_rbf == NULL)) {
|
| 522 |
|
|
fprintf(stderr,
|
| 523 |
|
|
"%s: bad DSF reference in migration edge\n",
|
| 524 |
|
|
progname);
|
| 525 |
|
|
return(0);
|
| 526 |
|
|
}
|
| 527 |
|
|
n = from_rbf->nrbf * to_rbf->nrbf;
|
| 528 |
|
|
newmig = (MIGRATION *)malloc(sizeof(MIGRATION) +
|
| 529 |
|
|
sizeof(float)*(n-1));
|
| 530 |
|
|
if (newmig == NULL)
|
| 531 |
|
|
goto memerr;
|
| 532 |
|
|
newmig->rbfv[0] = from_rbf;
|
| 533 |
|
|
newmig->rbfv[1] = to_rbf;
|
| 534 |
greg |
2.2 |
memset(newmig->mtx, 0, sizeof(float)*n);
|
| 535 |
|
|
for (i = 0; ; ) { /* read sparse data */
|
| 536 |
|
|
int zc = getint(1, ifp) & 0xff;
|
| 537 |
|
|
if ((i += zc) >= n)
|
| 538 |
|
|
break;
|
| 539 |
greg |
2.3 |
if (zc == 0xff)
|
| 540 |
|
|
continue;
|
| 541 |
greg |
2.2 |
newmig->mtx[i++] = getflt(ifp);
|
| 542 |
|
|
}
|
| 543 |
greg |
2.1 |
if (feof(ifp))
|
| 544 |
|
|
goto badEOF;
|
| 545 |
|
|
/* insert in edge lists */
|
| 546 |
|
|
newmig->enxt[0] = from_rbf->ejl;
|
| 547 |
|
|
from_rbf->ejl = newmig;
|
| 548 |
|
|
newmig->enxt[1] = to_rbf->ejl;
|
| 549 |
|
|
to_rbf->ejl = newmig;
|
| 550 |
|
|
/* push onto global list */
|
| 551 |
|
|
newmig->next = mig_list;
|
| 552 |
|
|
mig_list = newmig;
|
| 553 |
|
|
}
|
| 554 |
|
|
return(1); /* success! */
|
| 555 |
|
|
memerr:
|
| 556 |
|
|
fprintf(stderr, "%s: Out of memory in load_bsdf_rep()\n", progname);
|
| 557 |
|
|
exit(1);
|
| 558 |
|
|
badEOF:
|
| 559 |
|
|
fprintf(stderr, "%s: Unexpected EOF in load_bsdf_rep()\n", progname);
|
| 560 |
|
|
return(0);
|
| 561 |
|
|
}
|
