| 1 |
greg |
2.1 |
#ifndef lint
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| 2 |
greg |
2.11 |
static const char RCSid[] = "$Id: pabopto2xml.c,v 2.10 2012/09/18 02:50:13 greg Exp $";
|
| 3 |
greg |
2.1 |
#endif
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| 4 |
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/*
|
| 5 |
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* Convert PAB-Opto measurements to XML format using tensor tree representation
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| 6 |
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* Employs Bonneel et al. Earth Mover's Distance interpolant.
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| 7 |
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*
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| 8 |
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* G.Ward
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| 9 |
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*/
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| 10 |
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| 11 |
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#define _USE_MATH_DEFINES
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| 12 |
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#include <stdio.h>
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| 13 |
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#include <stdlib.h>
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| 14 |
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#include <string.h>
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| 15 |
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#include <ctype.h>
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| 16 |
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#include <math.h>
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| 17 |
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#include "bsdf.h"
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| 18 |
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| 19 |
greg |
2.10 |
#define DEBUG 1
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| 20 |
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| 21 |
greg |
2.1 |
#ifndef GRIDRES
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| 22 |
greg |
2.10 |
#define GRIDRES 200 /* grid resolution per side */
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| 23 |
greg |
2.1 |
#endif
|
| 24 |
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| 25 |
greg |
2.3 |
#define RSCA 2.7 /* radius scaling factor (empirical) */
|
| 26 |
greg |
2.2 |
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| 27 |
greg |
2.6 |
/* convert to/from coded radians */
|
| 28 |
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#define ANG2R(r) (int)((r)*((1<<16)/M_PI))
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| 29 |
greg |
2.2 |
#define R2ANG(c) (((c)+.5)*(M_PI/(1<<16)))
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| 30 |
greg |
2.1 |
|
| 31 |
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typedef struct {
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| 32 |
greg |
2.5 |
float vsum; /* DSF sum */
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| 33 |
greg |
2.1 |
unsigned short nval; /* number of values in sum */
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| 34 |
greg |
2.2 |
unsigned short crad; /* radius (coded angle) */
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| 35 |
greg |
2.1 |
} GRIDVAL; /* grid value */
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| 36 |
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| 37 |
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typedef struct {
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| 38 |
greg |
2.5 |
float peak; /* lobe value at peak */
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| 39 |
greg |
2.2 |
unsigned short crad; /* radius (coded angle) */
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| 40 |
greg |
2.1 |
unsigned char gx, gy; /* grid position */
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| 41 |
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} RBFVAL; /* radial basis function value */
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| 42 |
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| 43 |
greg |
2.7 |
struct s_rbfnode; /* forward declaration of RBF struct */
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| 44 |
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| 45 |
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typedef struct s_migration {
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| 46 |
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struct s_migration *next; /* next in global edge list */
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| 47 |
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struct s_rbfnode *rbfv[2]; /* from,to vertex */
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| 48 |
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struct s_migration *enxt[2]; /* next from,to sibling */
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| 49 |
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float mtx[1]; /* matrix (extends struct) */
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| 50 |
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} MIGRATION; /* migration link (winged edge structure) */
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| 51 |
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| 52 |
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typedef struct s_rbfnode {
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| 53 |
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struct s_rbfnode *next; /* next in global RBF list */
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| 54 |
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MIGRATION *ejl; /* edge list for this vertex */
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| 55 |
greg |
2.1 |
FVECT invec; /* incident vector direction */
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| 56 |
greg |
2.8 |
double vtotal; /* volume for normalization */
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| 57 |
greg |
2.1 |
int nrbf; /* number of RBFs */
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| 58 |
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RBFVAL rbfa[1]; /* RBF array (extends struct) */
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| 59 |
greg |
2.10 |
} RBFNODE; /* RBF representation of DSF @ 1 incidence */
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| 60 |
greg |
2.1 |
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| 61 |
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/* our loaded grid for this incident angle */
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| 62 |
greg |
2.10 |
static double theta_in_deg, phi_in_deg;
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| 63 |
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static GRIDVAL dsf_grid[GRIDRES][GRIDRES];
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| 64 |
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| 65 |
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/* all incident angles in-plane so far? */
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| 66 |
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static int single_plane_incident = -1;
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| 67 |
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| 68 |
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/* input/output orientations */
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| 69 |
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static int input_orient = 0;
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| 70 |
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static int output_orient = 0;
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| 71 |
greg |
2.1 |
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| 72 |
greg |
2.5 |
/* processed incident DSF measurements */
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| 73 |
greg |
2.10 |
static RBFNODE *dsf_list = NULL;
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| 74 |
greg |
2.7 |
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| 75 |
greg |
2.8 |
/* RBF-linking matrices (edges) */
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| 76 |
greg |
2.7 |
static MIGRATION *mig_list = NULL;
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| 77 |
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| 78 |
greg |
2.10 |
/* migration edges drawn in raster fashion */
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| 79 |
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static MIGRATION *mig_grid[GRIDRES][GRIDRES];
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| 80 |
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| 81 |
greg |
2.8 |
#define mtx_nrows(m) ((m)->rbfv[0]->nrbf)
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| 82 |
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#define mtx_ncols(m) ((m)->rbfv[1]->nrbf)
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| 83 |
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#define mtx_ndx(m,i,j) ((i)*mtx_ncols(m) + (j))
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| 84 |
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#define is_src(rbf,m) ((rbf) == (m)->rbfv[0])
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| 85 |
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#define is_dest(rbf,m) ((rbf) == (m)->rbfv[1])
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| 86 |
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#define nextedge(rbf,m) (m)->enxt[is_dest(rbf,m)]
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greg |
2.10 |
#define opp_rbf(rbf,m) (m)->rbfv[is_src(rbf,m)]
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| 89 |
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#define round(v) (int)((v) + .5 - ((v) < -.5))
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| 90 |
greg |
2.8 |
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| 91 |
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/* Compute volume associated with Gaussian lobe */
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| 92 |
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static double
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| 93 |
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rbf_volume(const RBFVAL *rbfp)
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| 94 |
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{
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| 95 |
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double rad = R2ANG(rbfp->crad);
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| 96 |
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| 97 |
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return((2.*M_PI) * rbfp->peak * rad*rad);
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| 98 |
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}
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| 99 |
greg |
2.1 |
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| 100 |
greg |
2.3 |
/* Compute outgoing vector from grid position */
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| 101 |
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static void
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| 102 |
greg |
2.10 |
ovec_from_pos(FVECT vec, int xpos, int ypos)
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| 103 |
greg |
2.1 |
{
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| 104 |
greg |
2.3 |
double uv[2];
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| 105 |
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double r2;
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| 106 |
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| 107 |
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SDsquare2disk(uv, (1./GRIDRES)*(xpos+.5), (1./GRIDRES)*(ypos+.5));
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| 108 |
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/* uniform hemispherical projection */
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| 109 |
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r2 = uv[0]*uv[0] + uv[1]*uv[1];
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| 110 |
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vec[0] = vec[1] = sqrt(2. - r2);
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| 111 |
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vec[0] *= uv[0];
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| 112 |
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vec[1] *= uv[1];
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| 113 |
greg |
2.10 |
vec[2] = output_orient*(1. - r2);
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| 114 |
greg |
2.1 |
}
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| 115 |
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| 116 |
greg |
2.10 |
/* Compute grid position from normalized input/output vector */
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| 117 |
greg |
2.1 |
static void
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| 118 |
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pos_from_vec(int pos[2], const FVECT vec)
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| 119 |
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{
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| 120 |
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double sq[2]; /* uniform hemispherical projection */
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| 121 |
greg |
2.10 |
double norm = 1./sqrt(1. + fabs(vec[2]));
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| 122 |
greg |
2.1 |
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| 123 |
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SDdisk2square(sq, vec[0]*norm, vec[1]*norm);
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| 124 |
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| 125 |
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pos[0] = (int)(sq[0]*GRIDRES);
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| 126 |
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pos[1] = (int)(sq[1]*GRIDRES);
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| 127 |
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}
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| 128 |
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| 129 |
greg |
2.5 |
/* Evaluate RBF for DSF at the given normalized outgoing direction */
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| 130 |
greg |
2.1 |
static double
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| 131 |
greg |
2.10 |
eval_rbfrep(const RBFNODE *rp, const FVECT outvec)
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| 132 |
greg |
2.1 |
{
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| 133 |
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double res = .0;
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| 134 |
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const RBFVAL *rbfp;
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| 135 |
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FVECT odir;
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| 136 |
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double sig2;
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| 137 |
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int n;
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| 138 |
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| 139 |
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rbfp = rp->rbfa;
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| 140 |
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for (n = rp->nrbf; n--; rbfp++) {
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| 141 |
greg |
2.10 |
ovec_from_pos(odir, rbfp->gx, rbfp->gy);
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| 142 |
greg |
2.2 |
sig2 = R2ANG(rbfp->crad);
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| 143 |
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sig2 = (DOT(odir,outvec) - 1.) / (sig2*sig2);
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| 144 |
greg |
2.1 |
if (sig2 > -19.)
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| 145 |
greg |
2.5 |
res += rbfp->peak * exp(sig2);
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| 146 |
greg |
2.1 |
}
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| 147 |
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return(res);
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| 148 |
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}
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| 149 |
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| 150 |
greg |
2.10 |
/* Insert a new directional scattering function in our global list */
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| 151 |
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static void
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| 152 |
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insert_dsf(RBFNODE *newrbf)
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| 153 |
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{
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| 154 |
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RBFNODE *rbf, *rbf_last;
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| 155 |
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| 156 |
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/* keep in ascending theta order */
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| 157 |
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for (rbf_last = NULL, rbf = dsf_list;
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| 158 |
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single_plane_incident & (rbf != NULL);
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| 159 |
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rbf_last = rbf, rbf = rbf->next)
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| 160 |
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if (input_orient*rbf->invec[2] < input_orient*newrbf->invec[2])
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| 161 |
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break;
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| 162 |
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if (rbf_last == NULL) {
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| 163 |
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newrbf->next = dsf_list;
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| 164 |
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dsf_list = newrbf;
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| 165 |
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return;
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| 166 |
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}
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| 167 |
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newrbf->next = rbf;
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| 168 |
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rbf_last->next = newrbf;
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| 169 |
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}
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| 170 |
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| 171 |
greg |
2.3 |
/* Count up filled nodes and build RBF representation from current grid */
|
| 172 |
greg |
2.10 |
static RBFNODE *
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| 173 |
greg |
2.3 |
make_rbfrep(void)
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| 174 |
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{
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| 175 |
greg |
2.6 |
int niter = 16;
|
| 176 |
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double lastVar, thisVar = 100.;
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| 177 |
greg |
2.3 |
int nn;
|
| 178 |
greg |
2.10 |
RBFNODE *newnode;
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| 179 |
greg |
2.3 |
int i, j;
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| 180 |
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| 181 |
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nn = 0; /* count selected bins */
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| 182 |
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for (i = 0; i < GRIDRES; i++)
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| 183 |
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for (j = 0; j < GRIDRES; j++)
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| 184 |
greg |
2.6 |
nn += dsf_grid[i][j].nval;
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| 185 |
greg |
2.3 |
/* allocate RBF array */
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| 186 |
greg |
2.10 |
newnode = (RBFNODE *)malloc(sizeof(RBFNODE) + sizeof(RBFVAL)*(nn-1));
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| 187 |
greg |
2.3 |
if (newnode == NULL) {
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| 188 |
greg |
2.8 |
fputs("Out of memory in make_rbfrep()\n", stderr);
|
| 189 |
greg |
2.3 |
exit(1);
|
| 190 |
|
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}
|
| 191 |
|
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newnode->next = NULL;
|
| 192 |
greg |
2.7 |
newnode->ejl = NULL;
|
| 193 |
greg |
2.3 |
newnode->invec[2] = sin(M_PI/180.*theta_in_deg);
|
| 194 |
|
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newnode->invec[0] = cos(M_PI/180.*phi_in_deg)*newnode->invec[2];
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| 195 |
|
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newnode->invec[1] = sin(M_PI/180.*phi_in_deg)*newnode->invec[2];
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| 196 |
greg |
2.10 |
newnode->invec[2] = input_orient*sqrt(1. - newnode->invec[2]*newnode->invec[2]);
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| 197 |
greg |
2.8 |
newnode->vtotal = 0;
|
| 198 |
greg |
2.3 |
newnode->nrbf = nn;
|
| 199 |
|
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nn = 0; /* fill RBF array */
|
| 200 |
|
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for (i = 0; i < GRIDRES; i++)
|
| 201 |
|
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for (j = 0; j < GRIDRES; j++)
|
| 202 |
greg |
2.5 |
if (dsf_grid[i][j].nval) {
|
| 203 |
greg |
2.6 |
newnode->rbfa[nn].peak = dsf_grid[i][j].vsum;
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| 204 |
greg |
2.5 |
newnode->rbfa[nn].crad = RSCA*dsf_grid[i][j].crad + .5;
|
| 205 |
greg |
2.3 |
newnode->rbfa[nn].gx = i;
|
| 206 |
|
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newnode->rbfa[nn].gy = j;
|
| 207 |
|
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++nn;
|
| 208 |
|
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}
|
| 209 |
greg |
2.6 |
/* iterate to improve interpolation accuracy */
|
| 210 |
|
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do {
|
| 211 |
greg |
2.4 |
double dsum = .0, dsum2 = .0;
|
| 212 |
greg |
2.3 |
nn = 0;
|
| 213 |
|
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for (i = 0; i < GRIDRES; i++)
|
| 214 |
|
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for (j = 0; j < GRIDRES; j++)
|
| 215 |
greg |
2.5 |
if (dsf_grid[i][j].nval) {
|
| 216 |
greg |
2.3 |
FVECT odir;
|
| 217 |
greg |
2.6 |
double corr;
|
| 218 |
greg |
2.10 |
ovec_from_pos(odir, i, j);
|
| 219 |
greg |
2.6 |
newnode->rbfa[nn++].peak *= corr =
|
| 220 |
greg |
2.5 |
dsf_grid[i][j].vsum /
|
| 221 |
greg |
2.3 |
eval_rbfrep(newnode, odir);
|
| 222 |
greg |
2.4 |
dsum += corr - 1.;
|
| 223 |
|
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dsum2 += (corr-1.)*(corr-1.);
|
| 224 |
greg |
2.3 |
}
|
| 225 |
greg |
2.6 |
lastVar = thisVar;
|
| 226 |
|
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thisVar = dsum2/(double)nn;
|
| 227 |
greg |
2.10 |
#ifdef DEBUG
|
| 228 |
greg |
2.4 |
fprintf(stderr, "Avg., RMS error: %.1f%% %.1f%%\n",
|
| 229 |
|
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100.*dsum/(double)nn,
|
| 230 |
greg |
2.6 |
100.*sqrt(thisVar));
|
| 231 |
greg |
2.10 |
#endif
|
| 232 |
greg |
2.6 |
} while (--niter > 0 && lastVar-thisVar > 0.02*lastVar);
|
| 233 |
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|
| 234 |
greg |
2.8 |
nn = 0; /* compute sum for normalization */
|
| 235 |
|
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while (nn < newnode->nrbf)
|
| 236 |
|
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newnode->vtotal += rbf_volume(&newnode->rbfa[nn++]);
|
| 237 |
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|
| 238 |
greg |
2.10 |
insert_dsf(newnode);
|
| 239 |
|
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return(newnode);
|
| 240 |
greg |
2.3 |
}
|
| 241 |
|
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|
| 242 |
greg |
2.1 |
/* Load a set of measurements corresponding to a particular incident angle */
|
| 243 |
|
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static int
|
| 244 |
greg |
2.10 |
load_pabopto_meas(const char *fname)
|
| 245 |
greg |
2.1 |
{
|
| 246 |
|
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FILE *fp = fopen(fname, "r");
|
| 247 |
|
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int inp_is_DSF = -1;
|
| 248 |
greg |
2.10 |
double new_phi, theta_out, phi_out, val;
|
| 249 |
greg |
2.1 |
char buf[2048];
|
| 250 |
|
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int n, c;
|
| 251 |
|
|
|
| 252 |
|
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if (fp == NULL) {
|
| 253 |
|
|
fputs(fname, stderr);
|
| 254 |
|
|
fputs(": cannot open\n", stderr);
|
| 255 |
|
|
return(0);
|
| 256 |
|
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}
|
| 257 |
greg |
2.5 |
memset(dsf_grid, 0, sizeof(dsf_grid));
|
| 258 |
greg |
2.10 |
#ifdef DEBUG
|
| 259 |
|
|
fprintf(stderr, "Loading measurement file '%s'...\n", fname);
|
| 260 |
|
|
#endif
|
| 261 |
greg |
2.1 |
/* read header information */
|
| 262 |
|
|
while ((c = getc(fp)) == '#' || c == EOF) {
|
| 263 |
|
|
if (fgets(buf, sizeof(buf), fp) == NULL) {
|
| 264 |
|
|
fputs(fname, stderr);
|
| 265 |
|
|
fputs(": unexpected EOF\n", stderr);
|
| 266 |
|
|
fclose(fp);
|
| 267 |
|
|
return(0);
|
| 268 |
|
|
}
|
| 269 |
|
|
if (!strcmp(buf, "format: theta phi DSF\n")) {
|
| 270 |
|
|
inp_is_DSF = 1;
|
| 271 |
|
|
continue;
|
| 272 |
|
|
}
|
| 273 |
|
|
if (!strcmp(buf, "format: theta phi BSDF\n")) {
|
| 274 |
|
|
inp_is_DSF = 0;
|
| 275 |
|
|
continue;
|
| 276 |
|
|
}
|
| 277 |
|
|
if (sscanf(buf, "intheta %lf", &theta_in_deg) == 1)
|
| 278 |
|
|
continue;
|
| 279 |
greg |
2.10 |
if (sscanf(buf, "inphi %lf", &new_phi) == 1)
|
| 280 |
greg |
2.1 |
continue;
|
| 281 |
|
|
if (sscanf(buf, "incident_angle %lf %lf",
|
| 282 |
greg |
2.10 |
&theta_in_deg, &new_phi) == 2)
|
| 283 |
greg |
2.1 |
continue;
|
| 284 |
|
|
}
|
| 285 |
|
|
if (inp_is_DSF < 0) {
|
| 286 |
|
|
fputs(fname, stderr);
|
| 287 |
|
|
fputs(": unknown format\n", stderr);
|
| 288 |
|
|
fclose(fp);
|
| 289 |
|
|
return(0);
|
| 290 |
|
|
}
|
| 291 |
greg |
2.10 |
if (!input_orient) /* check input orientation */
|
| 292 |
|
|
input_orient = 1 - 2*(theta_in_deg > 90.);
|
| 293 |
|
|
else if (input_orient > 0 ^ theta_in_deg < 90.) {
|
| 294 |
|
|
fputs("Cannot handle input angles on both sides of surface\n",
|
| 295 |
|
|
stderr);
|
| 296 |
|
|
exit(1);
|
| 297 |
|
|
}
|
| 298 |
|
|
if (single_plane_incident > 0) /* check if still in plane */
|
| 299 |
|
|
single_plane_incident = (round(new_phi) == round(phi_in_deg));
|
| 300 |
|
|
else if (single_plane_incident < 0)
|
| 301 |
|
|
single_plane_incident = 1;
|
| 302 |
|
|
phi_in_deg = new_phi;
|
| 303 |
|
|
ungetc(c, fp); /* read actual data */
|
| 304 |
greg |
2.1 |
while (fscanf(fp, "%lf %lf %lf\n", &theta_out, &phi_out, &val) == 3) {
|
| 305 |
|
|
FVECT ovec;
|
| 306 |
|
|
int pos[2];
|
| 307 |
|
|
|
| 308 |
greg |
2.10 |
if (!output_orient) /* check output orientation */
|
| 309 |
|
|
output_orient = 1 - 2*(theta_out > 90.);
|
| 310 |
|
|
else if (output_orient > 0 ^ theta_out < 90.) {
|
| 311 |
|
|
fputs("Cannot handle output angles on both sides of surface\n",
|
| 312 |
|
|
stderr);
|
| 313 |
|
|
exit(1);
|
| 314 |
|
|
}
|
| 315 |
greg |
2.1 |
ovec[2] = sin(M_PI/180.*theta_out);
|
| 316 |
|
|
ovec[0] = cos(M_PI/180.*phi_out) * ovec[2];
|
| 317 |
|
|
ovec[1] = sin(M_PI/180.*phi_out) * ovec[2];
|
| 318 |
|
|
ovec[2] = sqrt(1. - ovec[2]*ovec[2]);
|
| 319 |
|
|
|
| 320 |
greg |
2.5 |
if (!inp_is_DSF)
|
| 321 |
|
|
val *= ovec[2]; /* convert from BSDF to DSF */
|
| 322 |
greg |
2.1 |
|
| 323 |
|
|
pos_from_vec(pos, ovec);
|
| 324 |
|
|
|
| 325 |
greg |
2.5 |
dsf_grid[pos[0]][pos[1]].vsum += val;
|
| 326 |
|
|
dsf_grid[pos[0]][pos[1]].nval++;
|
| 327 |
greg |
2.1 |
}
|
| 328 |
|
|
n = 0;
|
| 329 |
|
|
while ((c = getc(fp)) != EOF)
|
| 330 |
|
|
n += !isspace(c);
|
| 331 |
|
|
if (n)
|
| 332 |
|
|
fprintf(stderr,
|
| 333 |
|
|
"%s: warning: %d unexpected characters past EOD\n",
|
| 334 |
|
|
fname, n);
|
| 335 |
|
|
fclose(fp);
|
| 336 |
|
|
return(1);
|
| 337 |
|
|
}
|
| 338 |
|
|
|
| 339 |
|
|
/* Compute radii for non-empty bins */
|
| 340 |
|
|
/* (distance to furthest empty bin for which non-empty bin is the closest) */
|
| 341 |
|
|
static void
|
| 342 |
|
|
compute_radii(void)
|
| 343 |
|
|
{
|
| 344 |
greg |
2.4 |
unsigned int fill_grid[GRIDRES][GRIDRES];
|
| 345 |
|
|
unsigned short fill_cnt[GRIDRES][GRIDRES];
|
| 346 |
greg |
2.2 |
FVECT ovec0, ovec1;
|
| 347 |
|
|
double ang2, lastang2;
|
| 348 |
|
|
int r, i, j, jn, ii, jj, inear, jnear;
|
| 349 |
|
|
|
| 350 |
|
|
r = GRIDRES/2; /* proceed in zig-zag */
|
| 351 |
greg |
2.1 |
for (i = 0; i < GRIDRES; i++)
|
| 352 |
|
|
for (jn = 0; jn < GRIDRES; jn++) {
|
| 353 |
|
|
j = (i&1) ? jn : GRIDRES-1-jn;
|
| 354 |
greg |
2.5 |
if (dsf_grid[i][j].nval) /* find empty grid pos. */
|
| 355 |
greg |
2.1 |
continue;
|
| 356 |
greg |
2.10 |
ovec_from_pos(ovec0, i, j);
|
| 357 |
greg |
2.1 |
inear = jnear = -1; /* find nearest non-empty */
|
| 358 |
greg |
2.2 |
lastang2 = M_PI*M_PI;
|
| 359 |
greg |
2.1 |
for (ii = i-r; ii <= i+r; ii++) {
|
| 360 |
|
|
if (ii < 0) continue;
|
| 361 |
|
|
if (ii >= GRIDRES) break;
|
| 362 |
|
|
for (jj = j-r; jj <= j+r; jj++) {
|
| 363 |
|
|
if (jj < 0) continue;
|
| 364 |
|
|
if (jj >= GRIDRES) break;
|
| 365 |
greg |
2.5 |
if (!dsf_grid[ii][jj].nval)
|
| 366 |
greg |
2.1 |
continue;
|
| 367 |
greg |
2.10 |
ovec_from_pos(ovec1, ii, jj);
|
| 368 |
greg |
2.2 |
ang2 = 2. - 2.*DOT(ovec0,ovec1);
|
| 369 |
|
|
if (ang2 >= lastang2)
|
| 370 |
greg |
2.1 |
continue;
|
| 371 |
greg |
2.2 |
lastang2 = ang2;
|
| 372 |
greg |
2.1 |
inear = ii; jnear = jj;
|
| 373 |
|
|
}
|
| 374 |
|
|
}
|
| 375 |
greg |
2.2 |
if (inear < 0) {
|
| 376 |
|
|
fputs("Could not find non-empty neighbor!\n", stderr);
|
| 377 |
|
|
exit(1);
|
| 378 |
|
|
}
|
| 379 |
|
|
ang2 = sqrt(lastang2);
|
| 380 |
|
|
r = ANG2R(ang2); /* record if > previous */
|
| 381 |
greg |
2.5 |
if (r > dsf_grid[inear][jnear].crad)
|
| 382 |
|
|
dsf_grid[inear][jnear].crad = r;
|
| 383 |
greg |
2.2 |
/* next search radius */
|
| 384 |
greg |
2.10 |
r = ang2*(2.*GRIDRES/M_PI) + 3;
|
| 385 |
greg |
2.1 |
}
|
| 386 |
greg |
2.4 |
/* blur radii over hemisphere */
|
| 387 |
greg |
2.1 |
memset(fill_grid, 0, sizeof(fill_grid));
|
| 388 |
greg |
2.4 |
memset(fill_cnt, 0, sizeof(fill_cnt));
|
| 389 |
greg |
2.1 |
for (i = 0; i < GRIDRES; i++)
|
| 390 |
|
|
for (j = 0; j < GRIDRES; j++) {
|
| 391 |
greg |
2.5 |
if (!dsf_grid[i][j].crad)
|
| 392 |
greg |
2.4 |
continue; /* missing distance */
|
| 393 |
greg |
2.5 |
r = R2ANG(dsf_grid[i][j].crad)*(2.*RSCA*GRIDRES/M_PI);
|
| 394 |
greg |
2.1 |
for (ii = i-r; ii <= i+r; ii++) {
|
| 395 |
|
|
if (ii < 0) continue;
|
| 396 |
|
|
if (ii >= GRIDRES) break;
|
| 397 |
|
|
for (jj = j-r; jj <= j+r; jj++) {
|
| 398 |
|
|
if (jj < 0) continue;
|
| 399 |
|
|
if (jj >= GRIDRES) break;
|
| 400 |
greg |
2.4 |
if ((ii-i)*(ii-i) + (jj-j)*(jj-j) > r*r)
|
| 401 |
greg |
2.1 |
continue;
|
| 402 |
greg |
2.5 |
fill_grid[ii][jj] += dsf_grid[i][j].crad;
|
| 403 |
greg |
2.4 |
fill_cnt[ii][jj]++;
|
| 404 |
greg |
2.1 |
}
|
| 405 |
|
|
}
|
| 406 |
|
|
}
|
| 407 |
greg |
2.6 |
/* copy back blurred radii */
|
| 408 |
greg |
2.1 |
for (i = 0; i < GRIDRES; i++)
|
| 409 |
|
|
for (j = 0; j < GRIDRES; j++)
|
| 410 |
greg |
2.4 |
if (fill_cnt[i][j])
|
| 411 |
greg |
2.5 |
dsf_grid[i][j].crad = fill_grid[i][j]/fill_cnt[i][j];
|
| 412 |
greg |
2.1 |
}
|
| 413 |
|
|
|
| 414 |
greg |
2.6 |
/* Cull points for more uniform distribution, leave all nval 0 or 1 */
|
| 415 |
greg |
2.1 |
static void
|
| 416 |
|
|
cull_values(void)
|
| 417 |
|
|
{
|
| 418 |
greg |
2.2 |
FVECT ovec0, ovec1;
|
| 419 |
|
|
double maxang, maxang2;
|
| 420 |
|
|
int i, j, ii, jj, r;
|
| 421 |
greg |
2.1 |
/* simple greedy algorithm */
|
| 422 |
|
|
for (i = 0; i < GRIDRES; i++)
|
| 423 |
|
|
for (j = 0; j < GRIDRES; j++) {
|
| 424 |
greg |
2.5 |
if (!dsf_grid[i][j].nval)
|
| 425 |
greg |
2.1 |
continue;
|
| 426 |
greg |
2.5 |
if (!dsf_grid[i][j].crad)
|
| 427 |
greg |
2.2 |
continue; /* shouldn't happen */
|
| 428 |
greg |
2.10 |
ovec_from_pos(ovec0, i, j);
|
| 429 |
greg |
2.5 |
maxang = 2.*R2ANG(dsf_grid[i][j].crad);
|
| 430 |
greg |
2.2 |
if (maxang > ovec0[2]) /* clamp near horizon */
|
| 431 |
|
|
maxang = ovec0[2];
|
| 432 |
|
|
r = maxang*(2.*GRIDRES/M_PI) + 1;
|
| 433 |
|
|
maxang2 = maxang*maxang;
|
| 434 |
greg |
2.1 |
for (ii = i-r; ii <= i+r; ii++) {
|
| 435 |
|
|
if (ii < 0) continue;
|
| 436 |
|
|
if (ii >= GRIDRES) break;
|
| 437 |
|
|
for (jj = j-r; jj <= j+r; jj++) {
|
| 438 |
|
|
if (jj < 0) continue;
|
| 439 |
|
|
if (jj >= GRIDRES) break;
|
| 440 |
greg |
2.5 |
if (!dsf_grid[ii][jj].nval)
|
| 441 |
greg |
2.1 |
continue;
|
| 442 |
greg |
2.2 |
if ((ii == i) & (jj == j))
|
| 443 |
|
|
continue; /* don't get self-absorbed */
|
| 444 |
greg |
2.10 |
ovec_from_pos(ovec1, ii, jj);
|
| 445 |
greg |
2.2 |
if (2. - 2.*DOT(ovec0,ovec1) >= maxang2)
|
| 446 |
greg |
2.1 |
continue;
|
| 447 |
greg |
2.2 |
/* absorb sum */
|
| 448 |
greg |
2.5 |
dsf_grid[i][j].vsum += dsf_grid[ii][jj].vsum;
|
| 449 |
|
|
dsf_grid[i][j].nval += dsf_grid[ii][jj].nval;
|
| 450 |
greg |
2.2 |
/* keep value, though */
|
| 451 |
greg |
2.6 |
dsf_grid[ii][jj].vsum /= (float)dsf_grid[ii][jj].nval;
|
| 452 |
greg |
2.5 |
dsf_grid[ii][jj].nval = 0;
|
| 453 |
greg |
2.1 |
}
|
| 454 |
|
|
}
|
| 455 |
|
|
}
|
| 456 |
greg |
2.6 |
/* final averaging pass */
|
| 457 |
|
|
for (i = 0; i < GRIDRES; i++)
|
| 458 |
|
|
for (j = 0; j < GRIDRES; j++)
|
| 459 |
|
|
if (dsf_grid[i][j].nval > 1) {
|
| 460 |
|
|
dsf_grid[i][j].vsum /= (float)dsf_grid[i][j].nval;
|
| 461 |
|
|
dsf_grid[i][j].nval = 1;
|
| 462 |
|
|
}
|
| 463 |
greg |
2.1 |
}
|
| 464 |
|
|
|
| 465 |
greg |
2.8 |
/* Compute (and allocate) migration price matrix for optimization */
|
| 466 |
|
|
static float *
|
| 467 |
greg |
2.10 |
price_routes(const RBFNODE *from_rbf, const RBFNODE *to_rbf)
|
| 468 |
greg |
2.8 |
{
|
| 469 |
|
|
float *pmtx = (float *)malloc(sizeof(float) *
|
| 470 |
|
|
from_rbf->nrbf * to_rbf->nrbf);
|
| 471 |
|
|
FVECT *vto = (FVECT *)malloc(sizeof(FVECT) * to_rbf->nrbf);
|
| 472 |
|
|
int i, j;
|
| 473 |
|
|
|
| 474 |
|
|
if ((pmtx == NULL) | (vto == NULL)) {
|
| 475 |
|
|
fputs("Out of memory in migration_costs()\n", stderr);
|
| 476 |
|
|
exit(1);
|
| 477 |
|
|
}
|
| 478 |
|
|
for (j = to_rbf->nrbf; j--; ) /* save repetitive ops. */
|
| 479 |
greg |
2.10 |
ovec_from_pos(vto[j], to_rbf->rbfa[j].gx, to_rbf->rbfa[j].gy);
|
| 480 |
greg |
2.8 |
|
| 481 |
|
|
for (i = from_rbf->nrbf; i--; ) {
|
| 482 |
|
|
const double from_ang = R2ANG(from_rbf->rbfa[i].crad);
|
| 483 |
|
|
FVECT vfrom;
|
| 484 |
greg |
2.10 |
ovec_from_pos(vfrom, from_rbf->rbfa[i].gx, from_rbf->rbfa[i].gy);
|
| 485 |
greg |
2.8 |
for (j = to_rbf->nrbf; j--; )
|
| 486 |
|
|
pmtx[i*to_rbf->nrbf + j] = acos(DOT(vfrom, vto[j])) +
|
| 487 |
|
|
fabs(R2ANG(to_rbf->rbfa[j].crad) - from_ang);
|
| 488 |
|
|
}
|
| 489 |
|
|
free(vto);
|
| 490 |
|
|
return(pmtx);
|
| 491 |
|
|
}
|
| 492 |
|
|
|
| 493 |
|
|
/* Comparison routine needed for sorting price row */
|
| 494 |
|
|
static const float *price_arr;
|
| 495 |
|
|
static int
|
| 496 |
|
|
msrt_cmp(const void *p1, const void *p2)
|
| 497 |
|
|
{
|
| 498 |
|
|
float c1 = price_arr[*(const int *)p1];
|
| 499 |
|
|
float c2 = price_arr[*(const int *)p2];
|
| 500 |
|
|
|
| 501 |
|
|
if (c1 > c2) return(1);
|
| 502 |
|
|
if (c1 < c2) return(-1);
|
| 503 |
|
|
return(0);
|
| 504 |
|
|
}
|
| 505 |
|
|
|
| 506 |
|
|
/* Compute minimum (optimistic) cost for moving the given source material */
|
| 507 |
|
|
static double
|
| 508 |
|
|
min_cost(double amt2move, const double *avail, const float *price, int n)
|
| 509 |
|
|
{
|
| 510 |
|
|
static int *price_sort = NULL;
|
| 511 |
|
|
static int n_alloc = 0;
|
| 512 |
|
|
double total_cost = 0;
|
| 513 |
|
|
int i;
|
| 514 |
|
|
|
| 515 |
|
|
if (amt2move <= FTINY) /* pre-emptive check */
|
| 516 |
|
|
return(0.);
|
| 517 |
|
|
if (n > n_alloc) { /* (re)allocate sort array */
|
| 518 |
|
|
if (n_alloc) free(price_sort);
|
| 519 |
|
|
price_sort = (int *)malloc(sizeof(int)*n);
|
| 520 |
|
|
if (price_sort == NULL) {
|
| 521 |
|
|
fputs("Out of memory in min_cost()\n", stderr);
|
| 522 |
|
|
exit(1);
|
| 523 |
|
|
}
|
| 524 |
|
|
n_alloc = n;
|
| 525 |
|
|
}
|
| 526 |
|
|
for (i = n; i--; )
|
| 527 |
|
|
price_sort[i] = i;
|
| 528 |
|
|
price_arr = price;
|
| 529 |
|
|
qsort(price_sort, n, sizeof(int), &msrt_cmp);
|
| 530 |
|
|
/* move cheapest first */
|
| 531 |
|
|
for (i = 0; i < n && amt2move > FTINY; i++) {
|
| 532 |
|
|
int d = price_sort[i];
|
| 533 |
|
|
double amt = (amt2move < avail[d]) ? amt2move : avail[d];
|
| 534 |
|
|
|
| 535 |
|
|
total_cost += amt * price[d];
|
| 536 |
|
|
amt2move -= amt;
|
| 537 |
|
|
}
|
| 538 |
|
|
return(total_cost);
|
| 539 |
|
|
}
|
| 540 |
|
|
|
| 541 |
|
|
/* Take a step in migration by choosing optimal bucket to transfer */
|
| 542 |
|
|
static double
|
| 543 |
|
|
migration_step(MIGRATION *mig, double *src_rem, double *dst_rem, const float *pmtx)
|
| 544 |
|
|
{
|
| 545 |
|
|
static double *src_cost = NULL;
|
| 546 |
|
|
int n_alloc = 0;
|
| 547 |
greg |
2.9 |
const double maxamt = 2./(mtx_nrows(mig)*mtx_ncols(mig));
|
| 548 |
greg |
2.8 |
double amt = 0;
|
| 549 |
|
|
struct {
|
| 550 |
|
|
int s, d; /* source and destination */
|
| 551 |
|
|
double price; /* price estimate per amount moved */
|
| 552 |
|
|
double amt; /* amount we can move */
|
| 553 |
|
|
} cur, best;
|
| 554 |
|
|
int i;
|
| 555 |
|
|
|
| 556 |
|
|
if (mtx_nrows(mig) > n_alloc) { /* allocate cost array */
|
| 557 |
|
|
if (n_alloc)
|
| 558 |
|
|
free(src_cost);
|
| 559 |
|
|
src_cost = (double *)malloc(sizeof(double)*mtx_nrows(mig));
|
| 560 |
|
|
if (src_cost == NULL) {
|
| 561 |
|
|
fputs("Out of memory in migration_step()\n", stderr);
|
| 562 |
|
|
exit(1);
|
| 563 |
|
|
}
|
| 564 |
|
|
n_alloc = mtx_nrows(mig);
|
| 565 |
|
|
}
|
| 566 |
|
|
for (i = mtx_nrows(mig); i--; ) /* starting costs for diff. */
|
| 567 |
|
|
src_cost[i] = min_cost(src_rem[i], dst_rem,
|
| 568 |
|
|
pmtx+i*mtx_ncols(mig), mtx_ncols(mig));
|
| 569 |
|
|
|
| 570 |
|
|
/* find best source & dest. */
|
| 571 |
|
|
best.s = best.d = -1; best.price = FHUGE; best.amt = 0;
|
| 572 |
|
|
for (cur.s = mtx_nrows(mig); cur.s--; ) {
|
| 573 |
|
|
const float *price = pmtx + cur.s*mtx_ncols(mig);
|
| 574 |
|
|
double cost_others = 0;
|
| 575 |
|
|
if (src_rem[cur.s] <= FTINY)
|
| 576 |
|
|
continue;
|
| 577 |
|
|
cur.d = -1; /* examine cheapest dest. */
|
| 578 |
|
|
for (i = mtx_ncols(mig); i--; )
|
| 579 |
|
|
if (dst_rem[i] > FTINY &&
|
| 580 |
|
|
(cur.d < 0 || price[i] < price[cur.d]))
|
| 581 |
|
|
cur.d = i;
|
| 582 |
|
|
if (cur.d < 0)
|
| 583 |
|
|
return(.0);
|
| 584 |
|
|
if ((cur.price = price[cur.d]) >= best.price)
|
| 585 |
|
|
continue; /* no point checking further */
|
| 586 |
|
|
cur.amt = (src_rem[cur.s] < dst_rem[cur.d]) ?
|
| 587 |
|
|
src_rem[cur.s] : dst_rem[cur.d];
|
| 588 |
|
|
if (cur.amt > maxamt) cur.amt = maxamt;
|
| 589 |
|
|
dst_rem[cur.d] -= cur.amt; /* add up differential costs */
|
| 590 |
|
|
for (i = mtx_nrows(mig); i--; ) {
|
| 591 |
|
|
if (i == cur.s) continue;
|
| 592 |
|
|
cost_others += min_cost(src_rem[i], dst_rem, price, mtx_ncols(mig))
|
| 593 |
|
|
- src_cost[i];
|
| 594 |
|
|
}
|
| 595 |
|
|
dst_rem[cur.d] += cur.amt; /* undo trial move */
|
| 596 |
|
|
cur.price += cost_others/cur.amt; /* adjust effective price */
|
| 597 |
|
|
if (cur.price < best.price) /* are we better than best? */
|
| 598 |
|
|
best = cur;
|
| 599 |
|
|
}
|
| 600 |
|
|
if ((best.s < 0) | (best.d < 0))
|
| 601 |
|
|
return(.0);
|
| 602 |
|
|
/* make the actual move */
|
| 603 |
|
|
mig->mtx[mtx_ndx(mig,best.s,best.d)] += best.amt;
|
| 604 |
|
|
src_rem[best.s] -= best.amt;
|
| 605 |
|
|
dst_rem[best.d] -= best.amt;
|
| 606 |
|
|
return(best.amt);
|
| 607 |
|
|
}
|
| 608 |
|
|
|
| 609 |
|
|
/* Compute (and insert) migration along directed edge */
|
| 610 |
|
|
static MIGRATION *
|
| 611 |
greg |
2.10 |
make_migration(RBFNODE *from_rbf, RBFNODE *to_rbf)
|
| 612 |
greg |
2.8 |
{
|
| 613 |
|
|
const double end_thresh = 0.02/(from_rbf->nrbf*to_rbf->nrbf);
|
| 614 |
|
|
float *pmtx = price_routes(from_rbf, to_rbf);
|
| 615 |
|
|
MIGRATION *newmig = (MIGRATION *)malloc(sizeof(MIGRATION) +
|
| 616 |
|
|
sizeof(float) *
|
| 617 |
|
|
(from_rbf->nrbf*to_rbf->nrbf - 1));
|
| 618 |
|
|
double *src_rem = (double *)malloc(sizeof(double)*from_rbf->nrbf);
|
| 619 |
|
|
double *dst_rem = (double *)malloc(sizeof(double)*to_rbf->nrbf);
|
| 620 |
|
|
double total_rem = 1.;
|
| 621 |
|
|
int i;
|
| 622 |
|
|
|
| 623 |
|
|
if ((newmig == NULL) | (src_rem == NULL) | (dst_rem == NULL)) {
|
| 624 |
|
|
fputs("Out of memory in make_migration()\n", stderr);
|
| 625 |
|
|
exit(1);
|
| 626 |
|
|
}
|
| 627 |
greg |
2.10 |
#ifdef DEBUG
|
| 628 |
|
|
{
|
| 629 |
|
|
double theta, phi;
|
| 630 |
|
|
theta = acos(from_rbf->invec[2])*(180./M_PI);
|
| 631 |
|
|
phi = atan2(from_rbf->invec[1],from_rbf->invec[0])*(180./M_PI);
|
| 632 |
|
|
fprintf(stderr, "Building path from (theta,phi) (%d,%d) to ",
|
| 633 |
|
|
round(theta), round(phi));
|
| 634 |
|
|
theta = acos(to_rbf->invec[2])*(180./M_PI);
|
| 635 |
|
|
phi = atan2(to_rbf->invec[1],to_rbf->invec[0])*(180./M_PI);
|
| 636 |
|
|
fprintf(stderr, "(%d,%d)\n", round(theta), round(phi));
|
| 637 |
|
|
}
|
| 638 |
|
|
#endif
|
| 639 |
greg |
2.8 |
newmig->next = NULL;
|
| 640 |
|
|
newmig->rbfv[0] = from_rbf;
|
| 641 |
|
|
newmig->rbfv[1] = to_rbf;
|
| 642 |
|
|
newmig->enxt[0] = newmig->enxt[1] = NULL;
|
| 643 |
|
|
memset(newmig->mtx, 0, sizeof(float)*from_rbf->nrbf*to_rbf->nrbf);
|
| 644 |
|
|
/* starting quantities */
|
| 645 |
|
|
for (i = from_rbf->nrbf; i--; )
|
| 646 |
|
|
src_rem[i] = rbf_volume(&from_rbf->rbfa[i]) / from_rbf->vtotal;
|
| 647 |
|
|
for (i = to_rbf->nrbf; i--; )
|
| 648 |
|
|
dst_rem[i] = rbf_volume(&to_rbf->rbfa[i]) / to_rbf->vtotal;
|
| 649 |
|
|
/* move a bit at a time */
|
| 650 |
|
|
while (total_rem > end_thresh)
|
| 651 |
|
|
total_rem -= migration_step(newmig, src_rem, dst_rem, pmtx);
|
| 652 |
|
|
|
| 653 |
|
|
free(pmtx); /* free working arrays */
|
| 654 |
|
|
free(src_rem);
|
| 655 |
|
|
free(dst_rem);
|
| 656 |
|
|
for (i = from_rbf->nrbf; i--; ) { /* normalize final matrix */
|
| 657 |
|
|
float nf = rbf_volume(&from_rbf->rbfa[i]);
|
| 658 |
|
|
int j;
|
| 659 |
|
|
if (nf <= FTINY) continue;
|
| 660 |
|
|
nf = from_rbf->vtotal / nf;
|
| 661 |
|
|
for (j = to_rbf->nrbf; j--; )
|
| 662 |
|
|
newmig->mtx[mtx_ndx(newmig,i,j)] *= nf;
|
| 663 |
|
|
}
|
| 664 |
|
|
/* insert in edge lists */
|
| 665 |
|
|
newmig->enxt[0] = from_rbf->ejl;
|
| 666 |
|
|
from_rbf->ejl = newmig;
|
| 667 |
|
|
newmig->enxt[1] = to_rbf->ejl;
|
| 668 |
|
|
to_rbf->ejl = newmig;
|
| 669 |
|
|
newmig->next = mig_list;
|
| 670 |
|
|
return(mig_list = newmig);
|
| 671 |
|
|
}
|
| 672 |
|
|
|
| 673 |
greg |
2.10 |
/* Get triangle surface orientation (unnormalized) */
|
| 674 |
|
|
static void
|
| 675 |
|
|
tri_orient(FVECT vres, const FVECT v1, const FVECT v2, const FVECT v3)
|
| 676 |
|
|
{
|
| 677 |
|
|
FVECT v2minus1, v3minus2;
|
| 678 |
|
|
|
| 679 |
|
|
VSUB(v2minus1, v2, v1);
|
| 680 |
|
|
VSUB(v3minus2, v3, v2);
|
| 681 |
|
|
VCROSS(vres, v2minus1, v3minus2);
|
| 682 |
|
|
}
|
| 683 |
|
|
|
| 684 |
|
|
/* Determine if vertex order is reversed (inward normal) */
|
| 685 |
|
|
static int
|
| 686 |
|
|
is_rev_tri(const FVECT v1, const FVECT v2, const FVECT v3)
|
| 687 |
|
|
{
|
| 688 |
|
|
FVECT tor;
|
| 689 |
|
|
|
| 690 |
|
|
tri_orient(tor, v1, v2, v3);
|
| 691 |
|
|
|
| 692 |
|
|
return(DOT(tor, v2) < 0.);
|
| 693 |
|
|
}
|
| 694 |
|
|
|
| 695 |
|
|
/* Find vertices completing triangles on either side of the given edge */
|
| 696 |
|
|
static int
|
| 697 |
|
|
get_triangles(RBFNODE *rbfv[2], const MIGRATION *mig)
|
| 698 |
|
|
{
|
| 699 |
|
|
const MIGRATION *ej, *ej2;
|
| 700 |
|
|
RBFNODE *tv;
|
| 701 |
|
|
|
| 702 |
|
|
rbfv[0] = rbfv[1] = NULL;
|
| 703 |
|
|
for (ej = mig->rbfv[0]->ejl; ej != NULL;
|
| 704 |
|
|
ej = nextedge(mig->rbfv[0],ej)) {
|
| 705 |
|
|
if (ej == mig)
|
| 706 |
|
|
continue;
|
| 707 |
|
|
tv = opp_rbf(mig->rbfv[0],ej);
|
| 708 |
|
|
for (ej2 = tv->ejl; ej2 != NULL; ej2 = nextedge(tv,ej2))
|
| 709 |
|
|
if (opp_rbf(tv,ej2) == mig->rbfv[1]) {
|
| 710 |
|
|
rbfv[is_rev_tri(mig->rbfv[0]->invec,
|
| 711 |
|
|
mig->rbfv[1]->invec,
|
| 712 |
|
|
tv->invec)] = tv;
|
| 713 |
|
|
break;
|
| 714 |
|
|
}
|
| 715 |
|
|
}
|
| 716 |
|
|
return((rbfv[0] != NULL) + (rbfv[1] != NULL));
|
| 717 |
|
|
}
|
| 718 |
|
|
|
| 719 |
|
|
/* Find context hull vertex to complete triangle (oriented call) */
|
| 720 |
|
|
static RBFNODE *
|
| 721 |
|
|
find_chull_vert(const RBFNODE *rbf0, const RBFNODE *rbf1)
|
| 722 |
greg |
2.8 |
{
|
| 723 |
greg |
2.10 |
FVECT vmid, vor;
|
| 724 |
|
|
RBFNODE *rbf, *rbfbest = NULL;
|
| 725 |
|
|
double dprod2, bestdprod2 = 0.5;
|
| 726 |
|
|
|
| 727 |
|
|
VADD(vmid, rbf0->invec, rbf1->invec);
|
| 728 |
|
|
if (normalize(vmid) == 0)
|
| 729 |
|
|
return(NULL);
|
| 730 |
|
|
/* XXX exhaustive search */
|
| 731 |
|
|
for (rbf = dsf_list; rbf != NULL; rbf = rbf->next) {
|
| 732 |
|
|
if ((rbf == rbf0) | (rbf == rbf1))
|
| 733 |
|
|
continue;
|
| 734 |
|
|
tri_orient(vor, rbf0->invec, rbf1->invec, rbf->invec);
|
| 735 |
|
|
dprod2 = DOT(vor, vmid);
|
| 736 |
|
|
if (dprod2 <= FTINY)
|
| 737 |
|
|
continue; /* wrong orientation */
|
| 738 |
|
|
dprod2 *= dprod2 / DOT(vor,vor);
|
| 739 |
|
|
if (dprod2 > bestdprod2) { /* more convex than prev? */
|
| 740 |
|
|
rbfbest = rbf;
|
| 741 |
|
|
bestdprod2 = dprod2;
|
| 742 |
|
|
}
|
| 743 |
|
|
}
|
| 744 |
|
|
return(rbf);
|
| 745 |
|
|
}
|
| 746 |
|
|
|
| 747 |
|
|
/* Create new migration edge and grow mesh recursively around it */
|
| 748 |
|
|
static void
|
| 749 |
|
|
mesh_from_edge(RBFNODE *rbf0, RBFNODE *rbf1)
|
| 750 |
|
|
{
|
| 751 |
|
|
MIGRATION *newej;
|
| 752 |
|
|
RBFNODE *tvert[2];
|
| 753 |
|
|
|
| 754 |
|
|
if (rbf0 < rbf1) /* avoid migration loops */
|
| 755 |
|
|
newej = make_migration(rbf0, rbf1);
|
| 756 |
|
|
else
|
| 757 |
|
|
newej = make_migration(rbf1, rbf0);
|
| 758 |
|
|
/* triangle on either side? */
|
| 759 |
|
|
get_triangles(tvert, newej);
|
| 760 |
|
|
if (tvert[0] == NULL) { /* recurse on new right edge */
|
| 761 |
|
|
tvert[0] = find_chull_vert(newej->rbfv[0], newej->rbfv[1]);
|
| 762 |
|
|
if (tvert[0] != NULL) {
|
| 763 |
|
|
mesh_from_edge(rbf0, tvert[0]);
|
| 764 |
|
|
mesh_from_edge(rbf1, tvert[0]);
|
| 765 |
|
|
}
|
| 766 |
|
|
}
|
| 767 |
|
|
if (tvert[1] == NULL) { /* recurse on new left edge */
|
| 768 |
|
|
tvert[1] = find_chull_vert(newej->rbfv[1], newej->rbfv[0]);
|
| 769 |
|
|
if (tvert[1] != NULL) {
|
| 770 |
|
|
mesh_from_edge(rbf0, tvert[1]);
|
| 771 |
|
|
mesh_from_edge(rbf1, tvert[1]);
|
| 772 |
|
|
}
|
| 773 |
|
|
}
|
| 774 |
|
|
}
|
| 775 |
greg |
2.8 |
|
| 776 |
greg |
2.10 |
/* Draw edge list into mig_grid array */
|
| 777 |
|
|
static void
|
| 778 |
|
|
draw_edges()
|
| 779 |
|
|
{
|
| 780 |
|
|
int nnull = 0, ntot = 0;
|
| 781 |
|
|
MIGRATION *ej;
|
| 782 |
|
|
int p0[2], p1[2];
|
| 783 |
|
|
|
| 784 |
|
|
/* memset(mig_grid, 0, sizeof(mig_grid)); */
|
| 785 |
|
|
for (ej = mig_list; ej != NULL; ej = ej->next) {
|
| 786 |
|
|
++ntot;
|
| 787 |
|
|
pos_from_vec(p0, ej->rbfv[0]->invec);
|
| 788 |
|
|
pos_from_vec(p1, ej->rbfv[1]->invec);
|
| 789 |
|
|
if ((p0[0] == p1[0]) & (p0[1] == p1[1])) {
|
| 790 |
|
|
++nnull;
|
| 791 |
|
|
mig_grid[p0[0]][p0[1]] = ej;
|
| 792 |
|
|
continue;
|
| 793 |
|
|
}
|
| 794 |
|
|
if (abs(p1[0]-p0[0]) > abs(p1[1]-p0[1])) {
|
| 795 |
|
|
const int xstep = 2*(p1[0] > p0[0]) - 1;
|
| 796 |
|
|
const double ystep = (double)((p1[1]-p0[1])*xstep) /
|
| 797 |
|
|
(double)(p1[0]-p0[0]);
|
| 798 |
|
|
int x;
|
| 799 |
|
|
double y;
|
| 800 |
|
|
for (x = p0[0], y = p0[1]+.5; x != p1[0];
|
| 801 |
|
|
x += xstep, y += ystep)
|
| 802 |
|
|
mig_grid[x][(int)y] = ej;
|
| 803 |
|
|
mig_grid[x][(int)y] = ej;
|
| 804 |
|
|
} else {
|
| 805 |
|
|
const int ystep = 2*(p1[1] > p0[1]) - 1;
|
| 806 |
|
|
const double xstep = (double)((p1[0]-p0[0])*ystep) /
|
| 807 |
|
|
(double)(p1[1]-p0[1]);
|
| 808 |
|
|
int y;
|
| 809 |
|
|
double x;
|
| 810 |
|
|
for (y = p0[1], x = p0[0]+.5; y != p1[1];
|
| 811 |
|
|
y += ystep, x += xstep)
|
| 812 |
|
|
mig_grid[(int)x][y] = ej;
|
| 813 |
|
|
mig_grid[(int)x][y] = ej;
|
| 814 |
|
|
}
|
| 815 |
|
|
}
|
| 816 |
|
|
if (nnull)
|
| 817 |
|
|
fprintf(stderr, "Warning: %d of %d edges are null\n",
|
| 818 |
|
|
nnull, ntot);
|
| 819 |
|
|
}
|
| 820 |
|
|
|
| 821 |
|
|
/* Build our triangle mesh from recorded RBFs */
|
| 822 |
|
|
static void
|
| 823 |
|
|
build_mesh()
|
| 824 |
|
|
{
|
| 825 |
|
|
double best2 = M_PI*M_PI;
|
| 826 |
|
|
RBFNODE *rbf, *rbf_near = NULL;
|
| 827 |
|
|
/* check if isotropic */
|
| 828 |
|
|
if (single_plane_incident) {
|
| 829 |
|
|
for (rbf = dsf_list; rbf != NULL; rbf = rbf->next)
|
| 830 |
|
|
if (rbf->next != NULL)
|
| 831 |
|
|
make_migration(rbf, rbf->next);
|
| 832 |
|
|
return;
|
| 833 |
|
|
}
|
| 834 |
|
|
/* find RBF nearest to head */
|
| 835 |
|
|
if (dsf_list == NULL)
|
| 836 |
|
|
return;
|
| 837 |
|
|
for (rbf = dsf_list->next; rbf != NULL; rbf = rbf->next) {
|
| 838 |
|
|
double dist2 = 2. - 2.*DOT(dsf_list->invec,rbf->invec);
|
| 839 |
|
|
if (dist2 < best2) {
|
| 840 |
|
|
rbf_near = rbf;
|
| 841 |
|
|
best2 = dist2;
|
| 842 |
|
|
}
|
| 843 |
|
|
}
|
| 844 |
|
|
if (rbf_near == NULL) {
|
| 845 |
|
|
fputs("Cannot find nearest point for first edge\n", stderr);
|
| 846 |
greg |
2.8 |
exit(1);
|
| 847 |
|
|
}
|
| 848 |
greg |
2.10 |
/* build mesh from this edge */
|
| 849 |
|
|
mesh_from_edge(dsf_list, rbf_near);
|
| 850 |
|
|
/* draw edge list into grid */
|
| 851 |
|
|
draw_edges();
|
| 852 |
|
|
}
|
| 853 |
|
|
|
| 854 |
|
|
/* Identify enclosing triangle for this position (flood fill raster check) */
|
| 855 |
|
|
static int
|
| 856 |
|
|
identify_tri(MIGRATION *miga[3], unsigned char vmap[GRIDRES][(GRIDRES+7)/8],
|
| 857 |
|
|
int px, int py)
|
| 858 |
|
|
{
|
| 859 |
|
|
const int btest = 1<<(py&07);
|
| 860 |
|
|
|
| 861 |
|
|
if (vmap[px][py>>3] & btest) /* already visited here? */
|
| 862 |
|
|
return(1);
|
| 863 |
|
|
/* else mark it */
|
| 864 |
|
|
vmap[px][py>>3] |= btest;
|
| 865 |
|
|
|
| 866 |
|
|
if (mig_grid[px][py] != NULL) { /* are we on an edge? */
|
| 867 |
|
|
int i;
|
| 868 |
|
|
for (i = 0; i < 3; i++) {
|
| 869 |
|
|
if (miga[i] == mig_grid[px][py])
|
| 870 |
|
|
return(1);
|
| 871 |
|
|
if (miga[i] != NULL)
|
| 872 |
|
|
continue;
|
| 873 |
|
|
miga[i] = mig_grid[px][py];
|
| 874 |
|
|
return(1);
|
| 875 |
|
|
}
|
| 876 |
|
|
return(0); /* outside triangle! */
|
| 877 |
|
|
}
|
| 878 |
|
|
/* check neighbors (flood) */
|
| 879 |
|
|
if (px > 0 && !identify_tri(miga, vmap, px-1, py))
|
| 880 |
|
|
return(0);
|
| 881 |
|
|
if (px < GRIDRES-1 && !identify_tri(miga, vmap, px+1, py))
|
| 882 |
|
|
return(0);
|
| 883 |
|
|
if (py > 0 && !identify_tri(miga, vmap, px, py-1))
|
| 884 |
|
|
return(0);
|
| 885 |
|
|
if (py < GRIDRES-1 && !identify_tri(miga, vmap, px, py+1))
|
| 886 |
|
|
return(0);
|
| 887 |
|
|
return(1); /* this neighborhood done */
|
| 888 |
|
|
}
|
| 889 |
|
|
|
| 890 |
|
|
/* Find edge(s) for interpolating the given incident vector */
|
| 891 |
|
|
static int
|
| 892 |
|
|
get_interp(MIGRATION *miga[3], const FVECT invec)
|
| 893 |
|
|
{
|
| 894 |
|
|
miga[0] = miga[1] = miga[2] = NULL;
|
| 895 |
|
|
if (single_plane_incident) { /* isotropic BSDF? */
|
| 896 |
|
|
RBFNODE *rbf; /* find edge we're on */
|
| 897 |
|
|
for (rbf = dsf_list; rbf != NULL; rbf = rbf->next) {
|
| 898 |
|
|
if (input_orient*rbf->invec[2] < input_orient*invec[2])
|
| 899 |
|
|
break;
|
| 900 |
|
|
if (rbf->next != NULL &&
|
| 901 |
|
|
input_orient*rbf->next->invec[2] <
|
| 902 |
|
|
input_orient*invec[2]) {
|
| 903 |
|
|
for (miga[0] = rbf->ejl; miga[0] != NULL;
|
| 904 |
|
|
miga[0] = nextedge(rbf,miga[0]))
|
| 905 |
|
|
if (opp_rbf(rbf,miga[0]) == rbf->next)
|
| 906 |
|
|
return(1);
|
| 907 |
|
|
break;
|
| 908 |
|
|
}
|
| 909 |
|
|
}
|
| 910 |
|
|
return(0); /* outside range! */
|
| 911 |
|
|
}
|
| 912 |
|
|
{ /* else use triagnle mesh */
|
| 913 |
|
|
unsigned char floodmap[GRIDRES][(GRIDRES+7)/8];
|
| 914 |
|
|
int pstart[2];
|
| 915 |
|
|
|
| 916 |
|
|
pos_from_vec(pstart, invec);
|
| 917 |
|
|
memset(floodmap, 0, sizeof(floodmap));
|
| 918 |
|
|
/* call flooding function */
|
| 919 |
|
|
if (!identify_tri(miga, floodmap, pstart[0], pstart[1]))
|
| 920 |
|
|
return(0); /* outside mesh */
|
| 921 |
|
|
if ((miga[0] == NULL) | (miga[2] == NULL))
|
| 922 |
|
|
return(0); /* should never happen */
|
| 923 |
|
|
if (miga[1] == NULL)
|
| 924 |
|
|
return(1); /* on edge */
|
| 925 |
|
|
return(3); /* else in triangle */
|
| 926 |
|
|
}
|
| 927 |
|
|
}
|
| 928 |
|
|
|
| 929 |
|
|
/* Advect and allocate new RBF along edge */
|
| 930 |
|
|
static RBFNODE *
|
| 931 |
|
|
e_advect_rbf(const MIGRATION *mig, const FVECT invec)
|
| 932 |
|
|
{
|
| 933 |
|
|
RBFNODE *rbf;
|
| 934 |
|
|
int n, i, j;
|
| 935 |
|
|
double t, full_dist;
|
| 936 |
|
|
/* get relative position */
|
| 937 |
|
|
t = acos(DOT(invec, mig->rbfv[0]->invec));
|
| 938 |
|
|
if (t < M_PI/GRIDRES) { /* near first DSF */
|
| 939 |
|
|
n = sizeof(RBFNODE) + sizeof(RBFVAL)*(mig->rbfv[0]->nrbf-1);
|
| 940 |
|
|
rbf = (RBFNODE *)malloc(n);
|
| 941 |
|
|
if (rbf == NULL)
|
| 942 |
|
|
goto memerr;
|
| 943 |
|
|
memcpy(rbf, mig->rbfv[0], n); /* just duplicate */
|
| 944 |
|
|
return(rbf);
|
| 945 |
|
|
}
|
| 946 |
|
|
full_dist = acos(DOT(mig->rbfv[0]->invec, mig->rbfv[1]->invec));
|
| 947 |
|
|
if (t > full_dist-M_PI/GRIDRES) { /* near second DSF */
|
| 948 |
|
|
n = sizeof(RBFNODE) + sizeof(RBFVAL)*(mig->rbfv[1]->nrbf-1);
|
| 949 |
|
|
rbf = (RBFNODE *)malloc(n);
|
| 950 |
|
|
if (rbf == NULL)
|
| 951 |
|
|
goto memerr;
|
| 952 |
|
|
memcpy(rbf, mig->rbfv[1], n); /* just duplicate */
|
| 953 |
|
|
return(rbf);
|
| 954 |
|
|
}
|
| 955 |
|
|
t /= full_dist;
|
| 956 |
|
|
n = 0; /* count migrating particles */
|
| 957 |
|
|
for (i = 0; i < mtx_nrows(mig); i++)
|
| 958 |
|
|
for (j = 0; j < mtx_ncols(mig); j++)
|
| 959 |
|
|
n += (mig->mtx[mtx_ndx(mig,i,j)] > FTINY);
|
| 960 |
|
|
|
| 961 |
|
|
rbf = (RBFNODE *)malloc(sizeof(RBFNODE) + sizeof(RBFVAL)*(n-1));
|
| 962 |
|
|
if (rbf == NULL)
|
| 963 |
|
|
goto memerr;
|
| 964 |
|
|
rbf->next = NULL; rbf->ejl = NULL;
|
| 965 |
|
|
VCOPY(rbf->invec, invec);
|
| 966 |
|
|
rbf->nrbf = n;
|
| 967 |
|
|
rbf->vtotal = 1.-t + t*mig->rbfv[1]->vtotal/mig->rbfv[0]->vtotal;
|
| 968 |
|
|
n = 0; /* advect RBF lobes */
|
| 969 |
|
|
for (i = 0; i < mtx_nrows(mig); i++) {
|
| 970 |
|
|
const RBFVAL *rbf0i = &mig->rbfv[0]->rbfa[i];
|
| 971 |
|
|
const float peak0 = rbf0i->peak;
|
| 972 |
|
|
const double rad0 = R2ANG(rbf0i->crad);
|
| 973 |
|
|
FVECT v0;
|
| 974 |
|
|
float mv;
|
| 975 |
|
|
ovec_from_pos(v0, rbf0i->gx, rbf0i->gy);
|
| 976 |
|
|
for (j = 0; j < mtx_ncols(mig); j++)
|
| 977 |
|
|
if ((mv = mig->mtx[mtx_ndx(mig,i,j)]) > FTINY) {
|
| 978 |
|
|
const RBFVAL *rbf1j = &mig->rbfv[1]->rbfa[j];
|
| 979 |
|
|
double rad1 = R2ANG(rbf1j->crad);
|
| 980 |
|
|
FVECT v;
|
| 981 |
|
|
int pos[2];
|
| 982 |
|
|
rbf->rbfa[n].peak = peak0 * mv * rbf->vtotal;
|
| 983 |
|
|
rbf->rbfa[n].crad = ANG2R(sqrt(rad0*rad0*(1.-t) +
|
| 984 |
|
|
rad1*rad1*t));
|
| 985 |
|
|
ovec_from_pos(v, rbf1j->gx, rbf1j->gy);
|
| 986 |
|
|
geodesic(v, v0, v, t, GEOD_REL);
|
| 987 |
|
|
pos_from_vec(pos, v);
|
| 988 |
|
|
rbf->rbfa[n].gx = pos[0];
|
| 989 |
|
|
rbf->rbfa[n].gy = pos[1];
|
| 990 |
|
|
++n;
|
| 991 |
|
|
}
|
| 992 |
|
|
}
|
| 993 |
|
|
rbf->vtotal *= mig->rbfv[0]->vtotal; /* turn ratio into actual */
|
| 994 |
|
|
return(rbf);
|
| 995 |
|
|
memerr:
|
| 996 |
|
|
fputs("Out of memory in e_advect_rbf()\n", stderr);
|
| 997 |
|
|
exit(1);
|
| 998 |
|
|
return(NULL); /* pro forma return */
|
| 999 |
|
|
}
|
| 1000 |
|
|
|
| 1001 |
greg |
2.11 |
/* Insert vertex in ordered list */
|
| 1002 |
|
|
static void
|
| 1003 |
|
|
insert_vert(RBFNODE **vlist, RBFNODE *v)
|
| 1004 |
|
|
{
|
| 1005 |
|
|
int i, j;
|
| 1006 |
|
|
|
| 1007 |
|
|
for (i = 0; vlist[i] != NULL; i++) {
|
| 1008 |
|
|
if (v == vlist[i])
|
| 1009 |
|
|
return;
|
| 1010 |
|
|
if (v < vlist[i])
|
| 1011 |
|
|
break;
|
| 1012 |
|
|
}
|
| 1013 |
|
|
for (j = i; vlist[j] != NULL; j++)
|
| 1014 |
|
|
;
|
| 1015 |
|
|
while (j > i) {
|
| 1016 |
|
|
vlist[j] = vlist[j-1];
|
| 1017 |
|
|
--j;
|
| 1018 |
|
|
}
|
| 1019 |
|
|
vlist[i] = v;
|
| 1020 |
|
|
}
|
| 1021 |
|
|
|
| 1022 |
|
|
/* Sort triangle edges in standard order */
|
| 1023 |
|
|
static void
|
| 1024 |
|
|
order_triangle(MIGRATION *miga[3])
|
| 1025 |
|
|
{
|
| 1026 |
|
|
RBFNODE *vert[4];
|
| 1027 |
|
|
MIGRATION *ord[3];
|
| 1028 |
|
|
int i;
|
| 1029 |
|
|
/* order vertices, first */
|
| 1030 |
|
|
memset(vert, 0, sizeof(vert));
|
| 1031 |
|
|
for (i = 0; i < 3; i++) {
|
| 1032 |
|
|
insert_vert(vert, miga[i]->rbfv[0]);
|
| 1033 |
|
|
insert_vert(vert, miga[i]->rbfv[1]);
|
| 1034 |
|
|
}
|
| 1035 |
|
|
/* identify edge 0 */
|
| 1036 |
|
|
for (i = 0; i < 3; i++)
|
| 1037 |
|
|
if (miga[i]->rbfv[0] == vert[0] &&
|
| 1038 |
|
|
miga[i]->rbfv[1] == vert[1]) {
|
| 1039 |
|
|
ord[0] = miga[i];
|
| 1040 |
|
|
break;
|
| 1041 |
|
|
}
|
| 1042 |
|
|
/* identify edge 1 */
|
| 1043 |
|
|
for (i = 0; i < 3; i++)
|
| 1044 |
|
|
if (miga[i]->rbfv[0] == vert[1] &&
|
| 1045 |
|
|
miga[i]->rbfv[1] == vert[2]) {
|
| 1046 |
|
|
ord[1] = miga[i];
|
| 1047 |
|
|
break;
|
| 1048 |
|
|
}
|
| 1049 |
|
|
/* identify edge 2 */
|
| 1050 |
|
|
for (i = 0; i < 3; i++)
|
| 1051 |
|
|
if (miga[i]->rbfv[0] == vert[0] &&
|
| 1052 |
|
|
miga[i]->rbfv[1] == vert[2]) {
|
| 1053 |
|
|
ord[2] = miga[i];
|
| 1054 |
|
|
break;
|
| 1055 |
|
|
}
|
| 1056 |
|
|
miga[0] = ord[0]; miga[1] = ord[1]; miga[2] = ord[2];
|
| 1057 |
|
|
}
|
| 1058 |
|
|
|
| 1059 |
greg |
2.10 |
/* Partially advect between recorded incident angles and allocate new RBF */
|
| 1060 |
|
|
static RBFNODE *
|
| 1061 |
|
|
advect_rbf(const FVECT invec)
|
| 1062 |
|
|
{
|
| 1063 |
|
|
MIGRATION *miga[3];
|
| 1064 |
|
|
RBFNODE *rbf;
|
| 1065 |
greg |
2.11 |
float mbfact, mcfact;
|
| 1066 |
|
|
int n, i, j, k;
|
| 1067 |
|
|
FVECT v0, v1, v2;
|
| 1068 |
greg |
2.10 |
double s, t;
|
| 1069 |
|
|
|
| 1070 |
|
|
if (!get_interp(miga, invec)) /* can't interpolate? */
|
| 1071 |
|
|
return(NULL);
|
| 1072 |
|
|
if (miga[1] == NULL) /* along edge? */
|
| 1073 |
|
|
return(e_advect_rbf(miga[0], invec));
|
| 1074 |
greg |
2.11 |
/* put in standard order */
|
| 1075 |
|
|
order_triangle(miga);
|
| 1076 |
greg |
2.10 |
/* figure out position */
|
| 1077 |
greg |
2.11 |
fcross(v0, miga[2]->rbfv[0]->invec, miga[2]->rbfv[1]->invec);
|
| 1078 |
|
|
normalize(v0);
|
| 1079 |
|
|
fcross(v2, miga[1]->rbfv[0]->invec, miga[1]->rbfv[1]->invec);
|
| 1080 |
|
|
normalize(v2);
|
| 1081 |
|
|
fcross(v1, invec, miga[1]->rbfv[1]->invec);
|
| 1082 |
|
|
normalize(v1);
|
| 1083 |
|
|
s = acos(DOT(v0,v1)) / acos(DOT(v0,v2));
|
| 1084 |
|
|
geodesic(v1, miga[0]->rbfv[0]->invec, miga[0]->rbfv[1]->invec,
|
| 1085 |
|
|
s, GEOD_REL);
|
| 1086 |
|
|
t = acos(DOT(v1,invec)) / acos(DOT(v1,miga[1]->rbfv[1]->invec));
|
| 1087 |
|
|
n = 0; /* count migrating particles */
|
| 1088 |
|
|
for (i = 0; i < mtx_nrows(miga[0]); i++)
|
| 1089 |
|
|
for (j = 0; j < mtx_ncols(miga[0]); j++)
|
| 1090 |
|
|
for (k = (miga[0]->mtx[mtx_ndx(miga[0],i,j)] > FTINY) *
|
| 1091 |
|
|
mtx_ncols(miga[2]); k--; )
|
| 1092 |
|
|
n += (miga[2]->mtx[mtx_ndx(miga[2],i,k)] > FTINY &&
|
| 1093 |
|
|
miga[1]->mtx[mtx_ndx(miga[1],j,k)] > FTINY);
|
| 1094 |
|
|
|
| 1095 |
greg |
2.10 |
rbf = (RBFNODE *)malloc(sizeof(RBFNODE) + sizeof(RBFVAL)*(n-1));
|
| 1096 |
greg |
2.8 |
if (rbf == NULL) {
|
| 1097 |
|
|
fputs("Out of memory in advect_rbf()\n", stderr);
|
| 1098 |
|
|
exit(1);
|
| 1099 |
|
|
}
|
| 1100 |
|
|
rbf->next = NULL; rbf->ejl = NULL;
|
| 1101 |
|
|
VCOPY(rbf->invec, invec);
|
| 1102 |
greg |
2.10 |
rbf->nrbf = n;
|
| 1103 |
greg |
2.11 |
n = 0; /* compute RBF lobes */
|
| 1104 |
|
|
mbfact = s * miga[0]->rbfv[1]->vtotal/miga[0]->rbfv[0]->vtotal *
|
| 1105 |
|
|
(1.-t + t*miga[1]->rbfv[1]->vtotal/miga[1]->rbfv[0]->vtotal);
|
| 1106 |
|
|
mcfact = (1.-s) *
|
| 1107 |
|
|
(1.-t + t*miga[2]->rbfv[1]->vtotal/miga[2]->rbfv[0]->vtotal);
|
| 1108 |
|
|
for (i = 0; i < mtx_nrows(miga[0]); i++) {
|
| 1109 |
|
|
const RBFVAL *rbf0i = &miga[0]->rbfv[0]->rbfa[i];
|
| 1110 |
|
|
const float w0i = rbf0i->peak;
|
| 1111 |
|
|
const double rad0i = R2ANG(rbf0i->crad);
|
| 1112 |
|
|
ovec_from_pos(v0, rbf0i->gx, rbf0i->gy);
|
| 1113 |
|
|
for (j = 0; j < mtx_ncols(miga[0]); j++) {
|
| 1114 |
|
|
const float ma = miga[0]->mtx[mtx_ndx(miga[0],i,j)];
|
| 1115 |
|
|
const RBFVAL *rbf1j;
|
| 1116 |
|
|
double rad1j, srad2;
|
| 1117 |
|
|
if (ma <= FTINY)
|
| 1118 |
|
|
continue;
|
| 1119 |
|
|
rbf1j = &miga[0]->rbfv[1]->rbfa[j];
|
| 1120 |
|
|
rad1j = R2ANG(rbf1j->crad);
|
| 1121 |
|
|
srad2 = (1.-s)*(1.-t)*rad0i*rad0i + s*(1.-t)*rad1j*rad1j;
|
| 1122 |
|
|
ovec_from_pos(v1, rbf1j->gx, rbf1j->gy);
|
| 1123 |
|
|
geodesic(v1, v0, v1, s, GEOD_REL);
|
| 1124 |
|
|
for (k = 0; k < mtx_ncols(miga[2]); k++) {
|
| 1125 |
|
|
float mb = miga[1]->mtx[mtx_ndx(miga[1],j,k)];
|
| 1126 |
|
|
float mc = miga[2]->mtx[mtx_ndx(miga[2],i,k)];
|
| 1127 |
|
|
const RBFVAL *rbf2k;
|
| 1128 |
|
|
double rad2k;
|
| 1129 |
|
|
FVECT vout;
|
| 1130 |
|
|
int pos[2];
|
| 1131 |
|
|
if ((mb <= FTINY) | (mc <= FTINY))
|
| 1132 |
|
|
continue;
|
| 1133 |
|
|
rbf2k = &miga[2]->rbfv[1]->rbfa[k];
|
| 1134 |
|
|
rbf->rbfa[n].peak = w0i * ma * (mb*mbfact + mc*mcfact);
|
| 1135 |
|
|
rad2k = R2ANG(rbf2k->crad);
|
| 1136 |
|
|
rbf->rbfa[n].crad = RAD2R(sqrt(srad2 + t*rad2k*rad2k));
|
| 1137 |
|
|
ovec_from_pos(v2, rbf2k->gx, rbf2k->gy);
|
| 1138 |
|
|
geodesic(vout, v1, v2, t, GEOD_REL);
|
| 1139 |
|
|
pos_from_vec(pos, vout);
|
| 1140 |
|
|
rbf->rbfa[n].gx = pos[0];
|
| 1141 |
|
|
rbf->rbfa[n].gy = pos[1];
|
| 1142 |
|
|
++n;
|
| 1143 |
|
|
}
|
| 1144 |
|
|
}
|
| 1145 |
|
|
}
|
| 1146 |
|
|
rbf->vtotal = miga[0]->rbfv[0]->vtotal * (mbfact + mcfact);
|
| 1147 |
greg |
2.10 |
return(rbf);
|
| 1148 |
greg |
2.8 |
}
|
| 1149 |
greg |
2.1 |
|
| 1150 |
|
|
#if 1
|
| 1151 |
|
|
/* Test main produces a Radiance model from the given input file */
|
| 1152 |
|
|
int
|
| 1153 |
|
|
main(int argc, char *argv[])
|
| 1154 |
|
|
{
|
| 1155 |
|
|
char buf[128];
|
| 1156 |
|
|
FILE *pfp;
|
| 1157 |
|
|
double bsdf;
|
| 1158 |
|
|
FVECT dir;
|
| 1159 |
|
|
int i, j, n;
|
| 1160 |
|
|
|
| 1161 |
|
|
if (argc != 2) {
|
| 1162 |
|
|
fprintf(stderr, "Usage: %s input.dat > output.rad\n", argv[0]);
|
| 1163 |
|
|
return(1);
|
| 1164 |
|
|
}
|
| 1165 |
greg |
2.10 |
if (!load_pabopto_meas(argv[1]))
|
| 1166 |
greg |
2.1 |
return(1);
|
| 1167 |
|
|
|
| 1168 |
|
|
compute_radii();
|
| 1169 |
|
|
cull_values();
|
| 1170 |
greg |
2.3 |
make_rbfrep();
|
| 1171 |
|
|
/* produce spheres at meas. */
|
| 1172 |
|
|
puts("void plastic yellow\n0\n0\n5 .6 .4 .01 .04 .08\n");
|
| 1173 |
greg |
2.1 |
puts("void plastic pink\n0\n0\n5 .5 .05 .9 .04 .08\n");
|
| 1174 |
|
|
n = 0;
|
| 1175 |
|
|
for (i = 0; i < GRIDRES; i++)
|
| 1176 |
|
|
for (j = 0; j < GRIDRES; j++)
|
| 1177 |
greg |
2.5 |
if (dsf_grid[i][j].vsum > .0f) {
|
| 1178 |
greg |
2.10 |
ovec_from_pos(dir, i, j);
|
| 1179 |
greg |
2.5 |
bsdf = dsf_grid[i][j].vsum / dir[2];
|
| 1180 |
|
|
if (dsf_grid[i][j].nval) {
|
| 1181 |
greg |
2.3 |
printf("pink cone c%04d\n0\n0\n8\n", ++n);
|
| 1182 |
|
|
printf("\t%.6g %.6g %.6g\n",
|
| 1183 |
greg |
2.1 |
dir[0]*bsdf, dir[1]*bsdf, dir[2]*bsdf);
|
| 1184 |
greg |
2.3 |
printf("\t%.6g %.6g %.6g\n",
|
| 1185 |
greg |
2.1 |
dir[0]*(bsdf+.005), dir[1]*(bsdf+.005),
|
| 1186 |
|
|
dir[2]*(bsdf+.005));
|
| 1187 |
greg |
2.3 |
puts("\t.003\t0\n");
|
| 1188 |
|
|
} else {
|
| 1189 |
greg |
2.10 |
ovec_from_pos(dir, i, j);
|
| 1190 |
greg |
2.3 |
printf("yellow sphere s%04d\n0\n0\n", ++n);
|
| 1191 |
|
|
printf("4 %.6g %.6g %.6g .0015\n\n",
|
| 1192 |
|
|
dir[0]*bsdf, dir[1]*bsdf, dir[2]*bsdf);
|
| 1193 |
|
|
}
|
| 1194 |
greg |
2.1 |
}
|
| 1195 |
|
|
/* output continuous surface */
|
| 1196 |
|
|
puts("void trans tgreen\n0\n0\n7 .7 1 .7 .04 .04 .9 .9\n");
|
| 1197 |
|
|
fflush(stdout);
|
| 1198 |
greg |
2.5 |
sprintf(buf, "gensurf tgreen bsdf - - - %d %d", GRIDRES-1, GRIDRES-1);
|
| 1199 |
greg |
2.1 |
pfp = popen(buf, "w");
|
| 1200 |
|
|
if (pfp == NULL) {
|
| 1201 |
|
|
fputs(buf, stderr);
|
| 1202 |
|
|
fputs(": cannot start command\n", stderr);
|
| 1203 |
|
|
return(1);
|
| 1204 |
|
|
}
|
| 1205 |
|
|
for (i = 0; i < GRIDRES; i++)
|
| 1206 |
|
|
for (j = 0; j < GRIDRES; j++) {
|
| 1207 |
greg |
2.10 |
ovec_from_pos(dir, i, j);
|
| 1208 |
greg |
2.5 |
bsdf = eval_rbfrep(dsf_list, dir) / dir[2];
|
| 1209 |
greg |
2.1 |
fprintf(pfp, "%.8e %.8e %.8e\n",
|
| 1210 |
|
|
dir[0]*bsdf, dir[1]*bsdf, dir[2]*bsdf);
|
| 1211 |
|
|
}
|
| 1212 |
|
|
return(pclose(pfp)==0 ? 0 : 1);
|
| 1213 |
|
|
}
|
| 1214 |
|
|
#endif
|
