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/* RCSid: $Id: warp3d.h,v 3.4 2003/07/14 22:24:00 schorsch Exp $ */
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/*
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* Header file for 3D warping routines.
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*/
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#ifndef _RAD_WARP3D_H_
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#define _RAD_WARP3D_H_
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#include "lookup.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/* interpolation flags */
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#define W3EXACT 01 /* no interpolation (slow) */
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#define W3FAST 02 /* discontinuous approx. (fast) */
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/* return flags for warp3d() */
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#define W3OK 0 /* normal return status */
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#define W3GAMUT 01 /* out of gamut */
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#define W3BADMAP 02 /* singular map */
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#define W3ERROR 04 /* system error (check errno) */
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#define GNBITS 6 /* number of bits per grid size <= 8 */
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#define MAXGN (1<<GNBITS) /* maximum grid dimension */
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typedef unsigned char GNDX[3]; /* grid index type */
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typedef float W3VEC[3]; /* vector type for 3D warp maps */
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struct grid3d {
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unsigned char flags; /* interpolation flags */
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GNDX gn; /* grid dimensions */
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W3VEC gmin, gstep; /* grid corner and voxel size */
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LUTAB gtab; /* grid lookup table */
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}; /* a regular, sparse warping grid */
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typedef struct {
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W3VEC *ip, *ov; /* discrete input/displ. pairs */
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int npts; /* number of point pairs */
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W3VEC llim, ulim; /* lower and upper input limits */
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double d2min, d2max; /* min. and max. point distance^2 */
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struct grid3d grid; /* point conversion grid */
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} WARP3D; /* a warp map */
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extern int warp3d(W3VEC po, W3VEC pi, WARP3D *wp);
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extern int add3dpt(WARP3D* wp, W3VEC pti, W3VEC pto);
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extern WARP3D* new3dw(int flgs);
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extern WARP3D* load3dw(char *fn, WARP3D *wp);
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extern void free3dw(WARP3D *wp);
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extern int set3dwfl(WARP3D *wp, int flgs);
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#define W3VCPY(v1,v2) ((v1)[0]=(v2)[0],(v1)[1]=(v2)[1],(v1)[2]=(v2)[2])
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#ifdef __cplusplus
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}
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#endif
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#endif /* _RAD_WARP3D_H_ */
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