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/* Copyright (c) 1997 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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|
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/* |
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* 3D warping routines. |
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*/ |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <math.h> |
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#include "rterror.h" |
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#include "rtio.h" |
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#include "fvect.h" |
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#include "warp3d.h" |
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#define MIND 1e-5 /* minimum distance between input points */ |
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typedef struct { |
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GNDX n; /* index must be first */ |
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W3VEC p; |
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W3VEC v; |
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} KEYDP; /* key/data allocation pair */ |
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#define fgetvec(f,v) (fgetval(f,'f',v) > 0 && fgetval(f,'f',v+1) > 0 \ |
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&& fgetval(f,'f',v+2) > 0) |
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#define fgetvec(p,v) (fgetval(p,'f',v) > 0 && fgetval(p,'f',v+1) > 0 \ |
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&& fgetval(p,'f',v+2) > 0) |
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|
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#define AHUNK 32 /* number of points to allocate at a time */ |
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#define AHUNK 24 /* number of points to allocate at a time */ |
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#ifndef malloc |
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extern char *malloc(), *realloc(); |
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#endif |
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extern void free(); |
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|
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double wpdist2(W3VEC p1, W3VEC p2); |
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static int gridpoint(GNDX ndx, W3VEC rem, W3VEC ipt, struct grid3d *gp); |
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static int get3dgpt(W3VEC ov, GNDX ndx, WARP3D *wp); |
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static int get3dgin(W3VEC ov, GNDX ndx, W3VEC rem, WARP3D *wp); |
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static void l3interp(W3VEC vo, W3VEC *cl, W3VEC dv, int n); |
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static int warp3dex(W3VEC ov, W3VEC pi, WARP3D *wp); |
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static lut_hashf_t gridhash; |
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static int new3dgrid(WARP3D *wp); |
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static void done3dgrid(struct grid3d *gp); |
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|
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double |
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wpdist2(p1, p2) /* compute square of distance between points */ |
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register W3VEC p1, p2; |
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wpdist2( /* compute square of distance between points */ |
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register W3VEC p1, |
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register W3VEC p2 |
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) |
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{ |
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double d, d2; |
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int |
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warp3d(po, pi, wp) /* warp 3D point according to the given map */ |
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W3VEC po, pi; |
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register WARP3D *wp; |
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warp3d( /* warp 3D point according to the given map */ |
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W3VEC po, |
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W3VEC pi, |
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register WARP3D *wp |
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) |
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{ |
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int rval = W3OK; |
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GNDX gi; |
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W3VEC gd; |
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W3VEC gd, ov; |
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|
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if (wp->grid.gn[0] == 0 && (rval = new3dwgrid(wp)) != W3OK) |
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if (wp->grid.gn[0] == 0 && (rval = new3dgrid(wp)) != W3OK) |
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return(rval); |
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rval |= gridpoint(gi, gd, pi, &wp->grid); |
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if (wp->grid.flags & W3EXACT) { |
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rval |= warp3dex(po, pi, wp); |
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return(rval); |
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} |
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if (wp->grid.flags & W3FAST) { |
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rval |= get3dgpt(po, gi, wp); |
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return(rval); |
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} |
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rval |= get3dgin(po, gi, gd, wp); |
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if (wp->grid.flags & W3EXACT) |
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rval |= warp3dex(ov, pi, wp); |
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else if (wp->grid.flags & W3FAST) |
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rval |= get3dgpt(ov, gi, wp); |
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else |
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rval |= get3dgin(ov, gi, gd, wp); |
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po[0] = pi[0] + ov[0]; |
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po[1] = pi[1] + ov[1]; |
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po[2] = pi[2] + ov[2]; |
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return(rval); |
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} |
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|
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int |
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gridpoint(ndx, rem, ipt, gp) /* compute grid position for ipt */ |
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GNDX ndx; |
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W3VEC rem, ipt; |
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register struct grid3d *gp; |
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static int |
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gridpoint( /* compute grid position for ipt */ |
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GNDX ndx, |
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W3VEC rem, |
87 |
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W3VEC ipt, |
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register struct grid3d *gp |
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) |
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{ |
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int rval = W3OK; |
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register int i; |
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} |
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int |
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get3dgpt(po, ndx, wp) /* get value for voxel */ |
112 |
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W3VEC po; |
113 |
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GNDX ndx; |
114 |
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register WARP3D *wp; |
110 |
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static int |
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get3dgpt( /* get value for voxel */ |
112 |
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W3VEC ov, |
113 |
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GNDX ndx, |
114 |
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register WARP3D *wp |
115 |
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) |
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{ |
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W3VEC gpt; |
118 |
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register LUENT *le; |
120 |
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int rval = W3OK; |
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register int i; |
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|
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le = lu_find(&wp->grid.gtab, (char *)ndx); |
123 |
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le = lu_find(&wp->grid.gtab, ndx); |
124 |
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if (le == NULL) |
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return(W3ERROR); |
126 |
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if (le->data == NULL) { |
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if (wp->grid.flags & W3FAST) /* on centers */ |
135 |
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gpt[i] += .5*wp->grid.gstep[i]; |
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} |
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rval |= warp3dex(kd->p, gpt, wp); |
137 |
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rval = warp3dex(kd->v, gpt, wp); |
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le->key = (char *)kd->n; |
139 |
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le->data = (char *)kd->p; |
139 |
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le->data = (char *)kd->v; |
140 |
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} |
141 |
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W3VCPY(po, (float *)le->data); |
141 |
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W3VCPY(ov, (float *)le->data); |
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return(rval); |
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} |
144 |
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|
145 |
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|
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int |
147 |
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get3dgin(po, ndx, rem, wp) /* interpolate from warp grid */ |
148 |
< |
W3VEC po, rem; |
149 |
< |
GNDX ndx; |
150 |
< |
WARP3D *wp; |
146 |
> |
static int |
147 |
> |
get3dgin( /* interpolate from warp grid */ |
148 |
> |
W3VEC ov, |
149 |
> |
GNDX ndx, |
150 |
> |
W3VEC rem, |
151 |
> |
WARP3D *wp |
152 |
> |
) |
153 |
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{ |
154 |
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W3VEC cv[8]; |
142 |
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int rval; |
155 |
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GNDX gi; |
156 |
+ |
int rval = W3OK; |
157 |
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register int i; |
158 |
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/* get corner values */ |
159 |
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for (i = 0; i < 8; i++) { |
164 |
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} |
165 |
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if (rval & W3ERROR) |
166 |
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return(rval); |
167 |
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l3interp(po, cv, rem, 3); /* perform trilinear interpolation */ |
167 |
> |
l3interp(ov, cv, rem, 3); /* perform trilinear interpolation */ |
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return(rval); |
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} |
170 |
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|
171 |
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|
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l3interp(vo, cl, dv, n) /* trilinear interpolation (recursive) */ |
173 |
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W3VEC vo, *cl, dv; |
174 |
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int n; |
172 |
> |
static void |
173 |
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l3interp( /* trilinear interpolation (recursive) */ |
174 |
> |
W3VEC vo, |
175 |
> |
W3VEC *cl, |
176 |
> |
W3VEC dv, |
177 |
> |
int n |
178 |
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) |
179 |
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{ |
180 |
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W3VEC v0, v1; |
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register int i; |
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} |
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|
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int |
196 |
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warp3dex(po, pi, wp) /* compute warp using 1/r^2 weighted avg. */ |
197 |
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W3VEC po, pi; |
198 |
< |
register WARP3D *wp; |
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> |
static int |
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warp3dex( /* compute warp using 1/r^2 weighted avg. */ |
197 |
> |
W3VEC ov, |
198 |
> |
W3VEC pi, |
199 |
> |
register WARP3D *wp |
200 |
> |
) |
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{ |
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double d2, w, wsum; |
203 |
< |
W3VEC pt; |
203 |
> |
W3VEC vt; |
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register int i; |
205 |
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|
206 |
< |
pt[0] = pt[1] = pt[2] = 0.; |
206 |
> |
vt[0] = vt[1] = vt[2] = 0.; |
207 |
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wsum = 0.; |
208 |
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for (i = wp->npts; i--; ) { |
209 |
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d2 = wpdist2(pi, wp->ip[i]); |
210 |
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if (d2 <= MIND*MIND) w = 1./(MIND*MIND); |
211 |
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else w = 1./d2; |
212 |
< |
pt[0] += w*wp->op[i][0]; |
213 |
< |
pt[1] += w*wp->op[i][1]; |
214 |
< |
pt[2] += w*wp->op[i][2]; |
212 |
> |
vt[0] += w*wp->ov[i][0]; |
213 |
> |
vt[1] += w*wp->ov[i][1]; |
214 |
> |
vt[2] += w*wp->ov[i][2]; |
215 |
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wsum += w; |
216 |
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} |
217 |
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if (wsum > 0.) { |
218 |
< |
po[0] = pt[0]/wsum; |
219 |
< |
po[1] = pt[1]/wsum; |
220 |
< |
po[2] = pt[2]/wsum; |
218 |
> |
ov[0] = vt[0]/wsum; |
219 |
> |
ov[1] = vt[1]/wsum; |
220 |
> |
ov[2] = vt[2]/wsum; |
221 |
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} |
222 |
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return(W3OK); |
223 |
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} |
224 |
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|
225 |
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|
226 |
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WARP3D * |
227 |
< |
new3dw(flgs) /* allocate and initialize WARP3D struct */ |
228 |
< |
int flgs; |
227 |
> |
new3dw( /* allocate and initialize WARP3D struct */ |
228 |
> |
int flgs |
229 |
> |
) |
230 |
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{ |
231 |
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register WARP3D *wp; |
232 |
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|
238 |
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eputs("new3dw: no memory\n"); |
239 |
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return(NULL); |
240 |
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} |
241 |
< |
wp->ip = wp->op = NULL; |
241 |
> |
wp->ip = wp->ov = NULL; |
242 |
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wp->npts = 0; |
243 |
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wp->grid.flags = flgs; |
244 |
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wp->grid.gn[0] = wp->grid.gn[1] = wp->grid.gn[2] = 0; |
247 |
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|
248 |
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|
249 |
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WARP3D * |
250 |
< |
load3dw(fn, wp) /* load 3D warp from file */ |
251 |
< |
char *fn; |
252 |
< |
WARP3D *wp; |
250 |
> |
load3dw( /* load 3D warp from file */ |
251 |
> |
char *fn, |
252 |
> |
WARP3D *wp |
253 |
> |
) |
254 |
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{ |
255 |
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FILE *fp; |
256 |
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W3VEC inp, outp; |
260 |
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eputs(": cannot open\n"); |
261 |
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return(NULL); |
262 |
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} |
263 |
< |
if (wp == NULL && (wp = new3dw()) == NULL) |
263 |
> |
if (wp == NULL && (wp = new3dw(0)) == NULL) |
264 |
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goto memerr; |
265 |
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while (fgetvec(fp, inp) && fgetvec(fp, outp)) |
266 |
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if (!add3dpt(wp, inp, outp)) |
278 |
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} |
279 |
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|
280 |
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|
281 |
+ |
extern int |
282 |
+ |
set3dwfl( /* reset warp flags */ |
283 |
+ |
register WARP3D *wp, |
284 |
+ |
int flgs |
285 |
+ |
) |
286 |
+ |
{ |
287 |
+ |
if (flgs == wp->grid.flags) |
288 |
+ |
return(0); |
289 |
+ |
if ((flgs & (W3EXACT|W3FAST)) == (W3EXACT|W3FAST)) { |
290 |
+ |
eputs("set3dwfl: only one of W3EXACT or W3FAST\n"); |
291 |
+ |
return(-1); |
292 |
+ |
} |
293 |
+ |
wp->grid.flags = flgs; |
294 |
+ |
done3dgrid(&wp->grid); /* old grid is invalid */ |
295 |
+ |
return(0); |
296 |
+ |
} |
297 |
+ |
|
298 |
+ |
|
299 |
|
int |
300 |
< |
add3dpt(wp, pti, pto) /* add 3D point pair to warp structure */ |
301 |
< |
register WARP3D *wp; |
302 |
< |
W3VEC pti, pto; |
300 |
> |
add3dpt( /* add 3D point pair to warp structure */ |
301 |
> |
register WARP3D *wp, |
302 |
> |
W3VEC pti, |
303 |
> |
W3VEC pto |
304 |
> |
) |
305 |
|
{ |
306 |
|
double d2; |
307 |
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register W3VEC *na; |
310 |
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if (wp->npts == 0) { /* initialize */ |
311 |
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wp->ip = (W3VEC *)malloc(AHUNK*sizeof(W3VEC)); |
312 |
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if (wp->ip == NULL) return(0); |
313 |
< |
wp->op = (W3VEC *)malloc(AHUNK*sizeof(W3VEC)); |
314 |
< |
if (wp->op == NULL) return(0); |
313 |
> |
wp->ov = (W3VEC *)malloc(AHUNK*sizeof(W3VEC)); |
314 |
> |
if (wp->ov == NULL) return(0); |
315 |
|
wp->d2min = 1e10; |
316 |
|
wp->d2max = 0.; |
317 |
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W3VCPY(wp->llim, pti); |
318 |
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W3VCPY(wp->ulim, pti); |
319 |
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} else { |
320 |
|
if (wp->npts % AHUNK == 0) { /* allocate another hunk */ |
321 |
< |
na = (W3VEC *)realloc((char *)wp->ip, |
321 |
> |
na = (W3VEC *)realloc((void *)wp->ip, |
322 |
|
(wp->npts+AHUNK)*sizeof(W3VEC)); |
323 |
|
if (na == NULL) return(0); |
324 |
|
wp->ip = na; |
325 |
< |
na = (W3VEC *)realloc((char *)wp->op, |
325 |
> |
na = (W3VEC *)realloc((void *)wp->ov, |
326 |
|
(wp->npts+AHUNK)*sizeof(W3VEC)); |
327 |
|
if (na == NULL) return(0); |
328 |
< |
wp->op = na; |
328 |
> |
wp->ov = na; |
329 |
|
} |
330 |
|
for (i = 0; i < 3; i++) /* check boundaries */ |
331 |
|
if (pti[i] < wp->llim[i]) |
343 |
|
} |
344 |
|
} |
345 |
|
W3VCPY(wp->ip[wp->npts], pti); /* add new point */ |
346 |
< |
W3VCPY(wp->op[wp->npts], pto); |
346 |
> |
wp->ov[wp->npts][0] = pto[0] - pti[0]; |
347 |
> |
wp->ov[wp->npts][1] = pto[1] - pti[1]; |
348 |
> |
wp->ov[wp->npts][2] = pto[2] - pti[2]; |
349 |
|
done3dgrid(&wp->grid); /* old grid is invalid */ |
350 |
|
return(++wp->npts); |
351 |
|
} |
352 |
|
|
353 |
|
|
354 |
< |
free3dw(wp) /* free WARP3D data */ |
355 |
< |
register WARP3D *wp; |
354 |
> |
extern void |
355 |
> |
free3dw( /* free WARP3D data */ |
356 |
> |
register WARP3D *wp |
357 |
> |
) |
358 |
|
{ |
359 |
|
done3dgrid(&wp->grid); |
360 |
< |
free((char *)wp->ip); |
361 |
< |
free((char *)wp->op); |
362 |
< |
free((char *)wp); |
360 |
> |
free((void *)wp->ip); |
361 |
> |
free((void *)wp->ov); |
362 |
> |
free((void *)wp); |
363 |
|
} |
364 |
|
|
365 |
|
|
366 |
< |
long |
367 |
< |
gridhash(gp) /* hash a grid point index */ |
368 |
< |
GNDX gp; |
366 |
> |
static unsigned long |
367 |
> |
gridhash( /* hash a grid point index */ |
368 |
> |
const void *gp |
369 |
> |
) |
370 |
|
{ |
371 |
< |
return(((unsigned long)gp[0]<<GNBITS | gp[1])<<GNBITS | gp[2]); |
371 |
> |
return(((unsigned long)((const unsigned char*)gp)[0]<<GNBITS | ((const unsigned char*)gp)[1])<<GNBITS | ((const unsigned char*)gp)[2]); |
372 |
|
} |
373 |
|
|
374 |
|
|
375 |
< |
int |
376 |
< |
new3dwgrid(wp) /* initialize interpolating grid for warp */ |
377 |
< |
register WARP3D *wp; |
375 |
> |
static int |
376 |
> |
new3dgrid( /* initialize interpolating grid for warp */ |
377 |
> |
register WARP3D *wp |
378 |
> |
) |
379 |
|
{ |
380 |
+ |
W3VEC gmax; |
381 |
|
double gridstep, d; |
382 |
+ |
int n; |
383 |
|
register int i; |
384 |
|
/* free old grid (if any) */ |
385 |
|
done3dgrid(&wp->grid); |
390 |
|
return(W3BADMAP); /* not enough disparity */ |
391 |
|
/* compute gamut */ |
392 |
|
W3VCPY(wp->grid.gmin, wp->llim); |
393 |
< |
W3VCPY(wp->grid.gmax, wp->ulim); |
393 |
> |
W3VCPY(gmax, wp->ulim); |
394 |
|
gridstep = sqrt(wp->d2min); |
395 |
|
for (i = 0; i < 3; i++) { |
396 |
|
wp->grid.gmin[i] -= .501*gridstep; |
397 |
< |
wp->grid.gmax[i] += .501*gridstep; |
397 |
> |
gmax[i] += .501*gridstep; |
398 |
|
} |
399 |
|
if (wp->grid.flags & W3EXACT) { |
400 |
|
wp->grid.gn[0] = wp->grid.gn[1] = wp->grid.gn[2] = 1; |
401 |
+ |
wp->grid.gstep[0] = gmax[0] - wp->grid.gmin[0]; |
402 |
+ |
wp->grid.gstep[1] = gmax[1] - wp->grid.gmin[1]; |
403 |
+ |
wp->grid.gstep[2] = gmax[2] - wp->grid.gmin[2]; |
404 |
|
return(W3OK); /* no interpolation, so no grid */ |
405 |
|
} |
406 |
|
/* create grid */ |
407 |
|
for (i = 0; i < 3; i++) { |
408 |
< |
d = wp->grid.gmax[i] - wp->grid.gmin[i]; |
409 |
< |
wp->grid.gn[i] = d/gridstep + .5; |
410 |
< |
if (wp->grid.gn[i] >= MAXGN) |
411 |
< |
wp->grid.gn[i] = MAXGN-1; |
412 |
< |
wp->grid.gstep[i] = d / wp->grid.gn[i]; |
408 |
> |
d = gmax[i] - wp->grid.gmin[i]; |
409 |
> |
n = d/gridstep + .5; |
410 |
> |
if (n >= MAXGN-1) |
411 |
> |
n = MAXGN-2; |
412 |
> |
wp->grid.gstep[i] = d / n; |
413 |
> |
wp->grid.gn[i] = n; |
414 |
|
} |
415 |
|
/* initialize lookup table */ |
416 |
|
wp->grid.gtab.hashf = gridhash; |
421 |
|
} |
422 |
|
|
423 |
|
|
424 |
< |
done3dgrid(gp) /* free interpolating grid for warp */ |
425 |
< |
register struct grid3d *gp; |
424 |
> |
static void |
425 |
> |
done3dgrid( /* free interpolating grid for warp */ |
426 |
> |
register struct grid3d *gp |
427 |
> |
) |
428 |
|
{ |
429 |
|
if (gp->gn[0] == 0) |
430 |
|
return; |