gsget.h File Reference

#include <grass/ogsf.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

BM_GET_BYOFFSET

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

Definition at line 31 of file gsget.h.

FNORM

#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 51 of file gsget.h.

GET_MAPATT

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

Definition at line 29 of file gsget.h.

GET_MAPATT1

#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.

GET_MAPATT2

#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 13 of file gsget.h.

NXMASK

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

Definition at line 37 of file gsget.h.

NYMASK

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

Definition at line 38 of file gsget.h.

NZMASK

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

Definition at line 39 of file gsget.h.

NZUP

#define NZUP   0x000003ff

Definition at line 41 of file gsget.h.

PNORM

#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 57 of file gsget.h.

SCALE_ATT

#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 24 of file gsget.h.

XYMAXPOS

#define XYMAXPOS   0x3ff /* 1023 */

Definition at line 34 of file gsget.h.

ZMAXPOS

#define ZMAXPOS   0x3ff /* 1023 */

Definition at line 35 of file gsget.h.