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greg |
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/* Copyright (c) 1997 Regents of the University of California */ |
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/* SCCSid "$SunId$ LBL" */ |
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/* |
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* Header file for 3D warping routines. |
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*/ |
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#include "lookup.h" |
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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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greg |
3.2 |
unsigned char flags; /* interpolation flags */ |
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greg |
3.1 |
GNDX gn; /* grid dimensions */ |
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greg |
3.2 |
W3VEC gmin, gstep; /* grid corner and voxel size */ |
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greg |
3.1 |
LUTAB gtab; /* grid lookup table */ |
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}; /* a regular, sparse warping grid */ |
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typedef struct { |
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greg |
3.2 |
W3VEC *ip, *ov; /* discrete input/displ. pairs */ |
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greg |
3.1 |
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 WARP3D *new3dw(), *load3dw(); |
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#define W3VCPY(v1,v2) ((v1)[0]=(v2)[0],(v1)[1]=(v2)[1],(v1)[2]=(v2)[2]) |
