gsget.h File Reference

#include <grass/gsurf.h>

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Macros
#define	GET_MAPATT1(buff, offset, att)
#define	GET_MAPATT2(buff, offset, att)
#define	SCALE_ATT(att, val, low, high)
#define	GET_MAPATT(buff, offset, att)   (get_mapatt(buff, offset, &(att)))
#define	BM_GET_BYOFFSET(bm, off)   (bm? BM_get(bm, (off%bm->cols), (off/bm->cols)): 0)
#define	XYMAXPOS   0x3ff /* 1023 */
#define	ZMAXPOS   0x3ff /* 1023 */
#define	NXMASK   0xffe00000 /* top 11 bits */
#define	NYMASK   0x1ffc00 /* middle 11 bits of packed int */
#define	NZMASK   0x3ff /* lowest 10 bits */
#define	NZUP   0x000003ff
#define	FNORM(i, nv)
#define	PNORM(i, nv)

---

Macro Definition Documentation

#define BM_GET_BYOFFSET	(		bm,
			off
	)		(bm? BM_get(bm, (off%bm->cols), (off/bm->cols)): 0)

Definition at line 29 of file gsget.h.

#define FNORM	(		i,
			nv
	)

Value:

nv[X] = ((int)(((i) & NXMASK) >> 21) - XYMAXPOS)/(float)XYMAXPOS; \
  nv[Y] = ((int)(((i) & NYMASK) >> 10) - XYMAXPOS)/(float)XYMAXPOS; \
  nv[Z] = (int)((i) & NZMASK) /(float)ZMAXPOS

Definition at line 50 of file gsget.h.

Referenced by GS_get_norm_at_xy(), gsd_coarse_surf_map(), gsd_norm_arrows(), gsd_surf_map(), gsd_surf_map_old(), and gsd_wire_arrows().

#define GET_MAPATT	(		buff,
			offset,
			att
	)		(get_mapatt(buff, offset, &(att)))

Definition at line 27 of file gsget.h.

Referenced by calc_norm(), get_diag_intersects(), get_horz_intersects(), get_vert_intersects(), GS_get_cat_at_xy(), GS_get_val_at_xy(), gsbm_make_mask(), gsd_coarse_surf_map(), gsd_fringe_horiz_line(), gsd_fringe_horiz_line2(), gsd_fringe_horiz_poly(), gsd_fringe_vert_line(), gsd_fringe_vert_poly(), gsd_norm_arrows(), gsd_surf_map(), gsd_surf_map_old(), gsd_wire_arrows(), gsd_wire_surf_map(), gsdiff_do_SD(), and viewcell_tri_interp().

#define GET_MAPATT1	(		buff,
			offset,
			att
	)

Value:

att=(buff->ib? (float)buff->ib[offset]: \
                                      buff->sb? (float)buff->sb[offset]: \
                                      buff->cb? (float)buff->cb[offset]: \
                                      buff->fb? (float)buff->fb[offset]: \
                                      0.0)

Definition at line 6 of file gsget.h.

#define GET_MAPATT2	(		buff,
			offset,
			att
	)

Value:

att=(buff->ib? (float)buff->ib[offset]: \
                                      buff->sb? (float)buff->sb[offset]: \
                                      buff->cb? (float)buff->cb[offset]: \
                                      buff->fb? (float)buff->fb[offset]: \
                                      buff->k); \
                                      if(buff->tfunc) \
                                          att = (buff->tfunc)(att, offset);

Definition at line 12 of file gsget.h.

#define NXMASK   0xffe00000 /* top 11 bits */

Definition at line 36 of file gsget.h.

#define NYMASK   0x1ffc00 /* middle 11 bits of packed int */

Definition at line 37 of file gsget.h.

#define NZMASK   0x3ff /* lowest 10 bits */

Definition at line 38 of file gsget.h.

#define NZUP   0x000003ff

Definition at line 40 of file gsget.h.

#define PNORM	(		i,
			nv
	)

Value:

i = ((unsigned int)((nv[X]*XYMAXPOS)+XYMAXPOS) << 21) |           \
  ((unsigned int)((nv[Y]*XYMAXPOS)+XYMAXPOS) << 10) |               \
  (unsigned int)(nv[Z]*ZMAXPOS)

Definition at line 56 of file gsget.h.

#define SCALE_ATT	(		att,
			val,
			low,
			high
	)

Value:

((val) <= att->max_nz && \
                                (val) >= att->min_nz && att->range_nz? \
                                (((val) - att->min_nz)/att->range_nz) * \
                                ((high) - (low)) + (low): 0)

Definition at line 22 of file gsget.h.

Referenced by gsd_coarse_surf_map(), gsd_surf_map(), and gsd_surf_map_old().

#define XYMAXPOS   0x3ff /* 1023 */

Definition at line 33 of file gsget.h.

#define ZMAXPOS   0x3ff /* 1023 */

Definition at line 34 of file gsget.h.