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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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* 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 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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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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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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W3VEC p1, |
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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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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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} |
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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, |
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W3VEC ipt, |
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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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int i; |
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for (i = 0; i < 3; i++) { |
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rem[i] = (ipt[i] - gp->gmin[i])/gp->gstep[i]; |
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} |
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int |
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get3dgpt(ov, ndx, wp) /* get value for voxel */ |
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W3VEC ov; |
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GNDX ndx; |
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register WARP3D *wp; |
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static int |
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get3dgpt( /* get value for voxel */ |
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W3VEC ov, |
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GNDX ndx, |
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WARP3D *wp |
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) |
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{ |
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W3VEC gpt; |
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register LUENT *le; |
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LUENT *le; |
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KEYDP *kd; |
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int rval = W3OK; |
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register int i; |
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int i; |
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le = lu_find(&wp->grid.gtab, ndx); |
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if (le == NULL) |
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} |
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int |
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get3dgin(ov, ndx, rem, wp) /* interpolate from warp grid */ |
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W3VEC ov, rem; |
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GNDX ndx; |
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WARP3D *wp; |
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static int |
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get3dgin( /* interpolate from warp grid */ |
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W3VEC ov, |
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GNDX ndx, |
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W3VEC rem, |
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WARP3D *wp |
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) |
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{ |
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W3VEC cv[8]; |
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GNDX gi; |
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int rval = W3OK; |
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register int i; |
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int i; |
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/* get corner values */ |
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for (i = 0; i < 8; i++) { |
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gi[0] = ndx[0] + (i & 1); |
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} |
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l3interp(vo, cl, dv, n) /* trilinear interpolation (recursive) */ |
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W3VEC vo, *cl, dv; |
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int n; |
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static void |
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l3interp( /* trilinear interpolation (recursive) */ |
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W3VEC vo, |
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W3VEC *cl, |
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W3VEC dv, |
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int n |
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) |
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{ |
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W3VEC v0, v1; |
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register int i; |
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int i; |
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if (--n) { |
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l3interp(v0, cl, dv, n); |
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} |
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int |
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warp3dex(ov, pi, wp) /* compute warp using 1/r^2 weighted avg. */ |
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W3VEC ov, pi; |
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register WARP3D *wp; |
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static int |
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warp3dex( /* compute warp using 1/r^2 weighted avg. */ |
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W3VEC ov, |
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W3VEC pi, |
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WARP3D *wp |
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) |
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double d2, w, wsum; |
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W3VEC vt; |
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register int i; |
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int i; |
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vt[0] = vt[1] = vt[2] = 0.; |
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wsum = 0.; |
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WARP3D * |
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new3dw(flgs) /* allocate and initialize WARP3D struct */ |
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int flgs; |
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new3dw( /* allocate and initialize WARP3D struct */ |
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int flgs |
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) |
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register WARP3D *wp; |
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WARP3D *wp; |
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if ((flgs & (W3EXACT|W3FAST)) == (W3EXACT|W3FAST)) { |
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eputs("new3dw: only one of W3EXACT or W3FAST\n"); |
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WARP3D * |
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load3dw(fn, wp) /* load 3D warp from file */ |
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char *fn; |
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WARP3D *wp; |
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load3dw( /* load 3D warp from file */ |
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char *fn, |
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WARP3D *wp |
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) |
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{ |
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FILE *fp; |
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W3VEC inp, outp; |
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} |
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int |
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set3dwfl(wp, flgs) /* reset warp flags */ |
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register WARP3D *wp; |
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int flgs; |
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extern int |
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set3dwfl( /* reset warp flags */ |
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WARP3D *wp, |
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int flgs |
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) |
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{ |
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if (flgs == wp->grid.flags) |
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return(0); |
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int |
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add3dpt(wp, pti, pto) /* add 3D point pair to warp structure */ |
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register WARP3D *wp; |
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W3VEC pti, pto; |
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add3dpt( /* add 3D point pair to warp structure */ |
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WARP3D *wp, |
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W3VEC pti, |
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W3VEC pto |
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) |
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double d2; |
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register W3VEC *na; |
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register int i; |
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W3VEC *na; |
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int i; |
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if (wp->npts == 0) { /* initialize */ |
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wp->ip = (W3VEC *)malloc(AHUNK*sizeof(W3VEC)); |
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W3VCPY(wp->ulim, pti); |
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} else { |
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if (wp->npts % AHUNK == 0) { /* allocate another hunk */ |
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na = (W3VEC *)realloc((char *)wp->ip, |
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na = (W3VEC *)realloc((void *)wp->ip, |
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(wp->npts+AHUNK)*sizeof(W3VEC)); |
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if (na == NULL) return(0); |
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wp->ip = na; |
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na = (W3VEC *)realloc((char *)wp->ov, |
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na = (W3VEC *)realloc((void *)wp->ov, |
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(wp->npts+AHUNK)*sizeof(W3VEC)); |
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if (na == NULL) return(0); |
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wp->ov = na; |
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} |
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free3dw(wp) /* free WARP3D data */ |
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register WARP3D *wp; |
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extern void |
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free3dw( /* free WARP3D data */ |
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WARP3D *wp |
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) |
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{ |
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done3dgrid(&wp->grid); |
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free((char *)wp->ip); |
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free((char *)wp->ov); |
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free((char *)wp); |
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free(wp->ip); |
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free(wp->ov); |
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free(wp); |
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} |
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long |
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gridhash(gp) /* hash a grid point index */ |
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GNDX gp; |
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static unsigned long |
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gridhash( /* hash a grid point index */ |
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const char *gp |
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) |
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{ |
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return(((unsigned long)gp[0]<<GNBITS | gp[1])<<GNBITS | gp[2]); |
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return(((unsigned long)((const unsigned char*)gp)[0]<<GNBITS | ((const unsigned char*)gp)[1])<<GNBITS | ((const unsigned char*)gp)[2]); |
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} |
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int |
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new3dgrid(wp) /* initialize interpolating grid for warp */ |
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register WARP3D *wp; |
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static int |
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new3dgrid( /* initialize interpolating grid for warp */ |
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WARP3D *wp |
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) |
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{ |
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W3VEC gmax; |
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double gridstep, d; |
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int n; |
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register int i; |
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int i; |
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/* free old grid (if any) */ |
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done3dgrid(&wp->grid); |
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/* check parameters */ |
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} |
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done3dgrid(gp) /* free interpolating grid for warp */ |
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register struct grid3d *gp; |
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static void |
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done3dgrid( /* free interpolating grid for warp */ |
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struct grid3d *gp |
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) |
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{ |
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if (gp->gn[0] == 0) |
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return; |