OGSF library - loading and manipulating volumes (lower level functions) More...

#include <math.h>
#include <grass/gis.h>
#include <grass/gstypes.h>
#include "rgbpack.h"
#include "mc33_table.h"

Include dependency graph for gvl_calc.c:

Go to the source code of this file.

Data Structures
struct	data_buffer

Macros
#define	BUFFER_SIZE 1000000
	memory buffer for writing More...

#define	LINTERP(d, a, b) (a + d * (b - a))

#define	TINTERP(d, v)

#define	FOR_VAR i_for

#define	FOR_0_TO_N(n, cmd) { int FOR_VAR; for (FOR_VAR = 0; FOR_VAR < n; FOR_VAR++) {cmd;} }

#define	WRITE(c) gvl_write_char(dbuff->ndx_new++, &(dbuff->new), c)
	writing and reading isosurface data More...

#define	READ() gvl_read_char(dbuff->ndx_old++, dbuff->old)

#define	SKIP(n) dbuff->ndx_old = dbuff->ndx_old + n

#define	IS_IN_DATA(att) ((isosurf->data_desc >> att) & 1)
	check and set data descriptor More...

#define	SET_IN_DATA(att) isosurf->data_desc = (isosurf->data_desc \| (1 << att))

#define	DISTANCE_2(x1, y1, x2, y2) sqrt((x1-x2)(x1-x2)+(y1-y2)(y1-y2))

#define	SLICE_MODE_INTERP_NO 0

#define	SLICE_MODE_INTERP_YES 1

Functions
int	mc33_process_cube (int c_ndx, float *v)
	ADD. More...

void	iso_w_cndx (int ndx, data_buffer *dbuff)
	Write cube index. More...

int	iso_r_cndx (data_buffer *dbuff)
	Read cube index. More...

int	iso_get_cube_value (geovol_isosurf isosurf, int desc, int x, int y, int z, float v)
	Get value from data input. More...

void	iso_get_range (geovol_isosurf isosurf, int desc, double min, double *max)
	Get volume file values range. More...

int	iso_get_cube_values (geovol_isosurf isosurf, int desc, int x, int y, int z, float v)
	Read values for cube. More...

void	iso_get_cube_grads (geovol_isosurf isosurf, int x, int y, int z, float(grad)[3])
	Calculate cube grads. More...

void	iso_calc_cube (geovol_isosurf isosurf, int x, int y, int z, data_buffer dbuff)
	Process cube. More...

int	gvl_isosurf_calc (geovol *gvol)
	Fill data structure with computed isosurfaces polygons. More...

void	gvl_write_char (int pos, unsigned char **data, unsigned char c)
	ADD. More...

unsigned char	gvl_read_char (int pos, const unsigned char *data)
	Read char. More...

void	gvl_align_data (int pos, unsigned char *data)
	Append data to buffer. More...

float	slice_get_value (geovol *gvl, int x, int y, int z)
	Get volume value. More...

int	slice_calc (geovol gvl, int ndx_slc, void colors)
	Calculate slices. More...

int	gvl_slices_calc (geovol *gvol)
	Calculate slices for given volume set. More...

Variables
int	Rows

int	Cols

int	Depths

double	ResX

double	ResY

double	ResZ

Detailed Description

OGSF library - loading and manipulating volumes (lower level functions)

GRASS OpenGL gsurf OGSF Library

This program is free software under the GNU General Public License (>=v2). Read the file COPYING that comes with GRASS for details.

Author: Tomas Paudits (February 2004); Doxygenized by Martin Landa <landa.martin gmail.com> (May 2008)

Definition in file gvl_calc.c.

Macro Definition Documentation

#define BUFFER_SIZE 1000000

memory buffer for writing

Definition at line 30 of file gvl_calc.c.

Referenced by gvl_write_char().

#define DISTANCE_2	(	x1,
		y1,
		x2,
		y2
	)	sqrt((x1-x2)(x1-x2)+(y1-y2)(y1-y2))

Definition at line 795 of file gvl_calc.c.

Referenced by slice_calc().

#define FOR_0_TO_N	(	n,
		cmd
	)	{ int FOR_VAR; for (FOR_VAR = 0; FOR_VAR < n; FOR_VAR++) {cmd;} }

Definition at line 46 of file gvl_calc.c.

Referenced by iso_calc_cube().

#define FOR_VAR i_for

Definition at line 45 of file gvl_calc.c.

Referenced by iso_calc_cube().

#define IS_IN_DATA ( att ) ((isosurf->data_desc >> att) & 1)

check and set data descriptor

Definition at line 58 of file gvl_calc.c.

Referenced by gvl_isosurf_calc(), and iso_calc_cube().

#define LINTERP	(	d,
		a,
		b
	)	(a + d * (b - a))

Definition at line 35 of file gvl_calc.c.

Referenced by iso_calc_cube().

#define READ ( ) gvl_read_char(dbuff->ndx_old++, dbuff->old)

Definition at line 52 of file gvl_calc.c.

Referenced by iso_calc_cube(), and iso_r_cndx().

#define SET_IN_DATA ( att ) isosurf->data_desc = (isosurf->data_desc | (1 << att))

Definition at line 59 of file gvl_calc.c.

Referenced by gvl_isosurf_calc().

#define SKIP ( n ) dbuff->ndx_old = dbuff->ndx_old + n

Definition at line 53 of file gvl_calc.c.

Referenced by iso_calc_cube().

#define SLICE_MODE_INTERP_NO 0

Definition at line 797 of file gvl_calc.c.

#define SLICE_MODE_INTERP_YES 1

Definition at line 798 of file gvl_calc.c.

Referenced by slice_calc().

#define TINTERP	(	d,
		v
	)

Value:

((v[0]*(1.-d[0])*(1.-d[1])*(1.-d[2])) +\
                        (v[1]*d[0]*(1.-d[1])*(1.-d[2])) + \
                        (v[2]*d[0]*d[1]*(1.-d[2])) + \
                        (v[3]*(1.-d[0])*d[1]*(1.-d[2])) + \
                        (v[4]*(1.-d[0])*(1.-d[1])*d[2]) + \
                        (v[5]*d[0]*(1.-d[1])*d[2]) + \
                        (v[6]*d[0]*d[1]*d[2]) + \
                        (v[7]*(1.-d[0])*d[1]*d[2]))

Definition at line 36 of file gvl_calc.c.

Referenced by iso_calc_cube().

#define WRITE ( c ) gvl_write_char(dbuff->ndx_new++, &(dbuff->new), c)

writing and reading isosurface data

Definition at line 51 of file gvl_calc.c.

Referenced by iso_calc_cube(), iso_r_cndx(), and iso_w_cndx().

Function Documentation

void gvl_align_data	(	int	pos,
		unsigned char *	data
	)

Append data to buffer.

Parameters

pos	position index
data	data buffer

Definition at line 771 of file gvl_calc.c.

References G_debug(), and tools::pos.

int gvl_isosurf_calc ( geovol * gvol )

Fill data structure with computed isosurfaces polygons.

Parameters

gvol	pointer to geovol struct

Returns: 1

Definition at line 584 of file gvl_calc.c.

References Cols, Depths, G_free(), gvl_file_end_read(), gvl_file_get_volfile(), gvl_file_set_mode(), gvl_file_start_read(), gvl_write_char(), IS_IN_DATA, iso_calc_cube(), data_buffer::ndx_new, data_buffer::ndx_old, data_buffer::new, NULL, data_buffer::num_zero, data_buffer::old, ResX, ResY, ResZ, Rows, SET_IN_DATA, and y.

Referenced by gvld_vol().

unsigned char gvl_read_char	(	int	pos,
		const unsigned char *	data
	)

Read char.

Parameters

pos	position index
data	data buffer

Returns: char on success; NULL on failure

Definition at line 757 of file gvl_calc.c.

References tools::pos.

int gvl_slices_calc ( geovol * gvol )

Calculate slices for given volume set.

Parameters

gvol	pointer to geovol struct

Returns: 1

Definition at line 1027 of file gvl_calc.c.

References Cols, Depths, G_debug(), gvl_file_get_name(), Gvl_load_colors_data(), Gvl_unload_colors_data(), ResX, ResY, ResZ, Rows, and slice_calc().

Referenced by gvld_vol().

void gvl_write_char	(	int	pos,
		unsigned char **	data,
		unsigned char	c
	)

ADD.

Parameters

pos
data
c

Definition at line 729 of file gvl_calc.c.

References BUFFER_SIZE, G_debug(), and tools::pos.

Referenced by gvl_isosurf_calc(), and slice_calc().

void iso_calc_cube	(	geovol_isosurf *	isosurf,
		int	x,
		int	y,
		int	z,
		data_buffer *	dbuff
	)

Process cube.

Parameters

isosurf
x,y,z
dbuff

Definition at line 323 of file gvl_calc.c.

References BLU_MASK, cell_table, CELL_ENTRY::edges, FOR_0_TO_N, FOR_VAR, GRN_MASK, GS_v3norm(), Gvl_get_color_for_value(), IS_IN_DATA, iso_get_cube_grads(), iso_get_cube_values(), iso_get_range(), iso_r_cndx(), iso_w_cndx(), LINTERP, max, mc33_process_cube(), min, n, CELL_ENTRY::nedges, READ, RED_MASK, SKIP, TINTERP, and WRITE.

Referenced by gvl_isosurf_calc().

void iso_get_cube_grads	(	geovol_isosurf *	isosurf,
		int	x,
		int	y,
		int	z,
		float(*)	grad[3]
	)

Calculate cube grads.

Parameters

isosurf
x,y,z
grad

Definition at line 246 of file gvl_calc.c.

References Cols, Depths, iso_get_cube_value(), and Rows.

Referenced by iso_calc_cube().

int iso_get_cube_value	(	geovol_isosurf *	isosurf,
		int	desc,
		int	x,
		int	y,
		int	z,
		float *	v
	)

Get value from data input.

Parameters

	isosurf
	desc
	x,y,z
[out]	value

Returns: 0; ?

Definition at line 155 of file gvl_calc.c.

References gvl_file_get_data_type(), gvl_file_get_value(), gvl_file_get_volfile(), gvl_file_is_null_value(), ResX, ResY, ResZ, and dialogs::type.

Referenced by iso_get_cube_grads(), and iso_get_cube_values().

int iso_get_cube_values	(	geovol_isosurf *	isosurf,
		int	desc,
		int	x,
		int	y,
		int	z,
		float *	v
	)

Read values for cube.

Parameters

	isosurf
	desc
	x,y,z
[out]	v

Returns

Definition at line 223 of file gvl_calc.c.

References iso_get_cube_value().

Referenced by iso_calc_cube().

void iso_get_range	(	geovol_isosurf *	isosurf,
		int	desc,
		double *	min,
		double *	max
	)

Get volume file values range.

Parameters

	isosurf
	desc
[out]	min
[out]	max

Definition at line 206 of file gvl_calc.c.

References gvl_file_get_min_max(), and gvl_file_get_volfile().

Referenced by iso_calc_cube().

int iso_r_cndx ( data_buffer * dbuff )

Read cube index.

Parameters

dbuff

Definition at line 120 of file gvl_calc.c.

References data_buffer::num_zero, READ, and WRITE.

Referenced by iso_calc_cube().

void iso_w_cndx	(	int	ndx,
		data_buffer *	dbuff
	)

Write cube index.

Parameters

ndx
dbuff

Definition at line 85 of file gvl_calc.c.

References data_buffer::num_zero, and WRITE.

Referenced by iso_calc_cube().

int mc33_process_cube	(	int	c_ndx,
		float *	v
	)

ADD.

Parameters

c_ndx
v

Returns

Definition at line 307 of file gvl_calc2.c.

References m_case, m_config, m_subconfig, mc33_test_face(), mc33_test_interior(), OFFSET_T1, OFFSET_T10_1_1_S1, OFFSET_T10_1_1_S2, OFFSET_T10_1_2, OFFSET_T10_2_S1, OFFSET_T10_2_S2, OFFSET_T11, OFFSET_T12_1_1_S1, OFFSET_T12_1_1_S2, OFFSET_T12_1_2, OFFSET_T12_2_S1, OFFSET_T12_2_S2, OFFSET_T13_1_S1, OFFSET_T13_1_S2, OFFSET_T13_2_S1, OFFSET_T13_2_S2, OFFSET_T13_3_S1, OFFSET_T13_3_S2, OFFSET_T13_4, OFFSET_T13_5_1, OFFSET_T13_5_2, OFFSET_T14, OFFSET_T2, OFFSET_T3_1, OFFSET_T3_2, OFFSET_T4_1, OFFSET_T4_2, OFFSET_T5, OFFSET_T6_1_1, OFFSET_T6_1_2, OFFSET_T6_2, OFFSET_T7_1, OFFSET_T7_2_S1, OFFSET_T7_2_S2, OFFSET_T7_2_S3, OFFSET_T7_3_S1, OFFSET_T7_3_S2, OFFSET_T7_3_S3, OFFSET_T7_4_1, OFFSET_T7_4_2, OFFSET_T8, OFFSET_T9, OFFSET_TEST10, OFFSET_TEST12, OFFSET_TEST13, OFFSET_TEST3, OFFSET_TEST4, OFFSET_TEST6, and OFFSET_TEST7.

Referenced by iso_calc_cube().

int slice_calc	(	geovol *	gvl,
		int	ndx_slc,
		void *	colors
	)

Calculate slices.

Parameters

gvl	pointer to geovol struct
ndx_slc
colors

Returns: 1

Definition at line 847 of file gvl_calc.c.

References BLU_MASK, tools::color, dialogs::cols, DISTANCE_2, GRN_MASK, gvl_file_end_read(), gvl_file_get_volfile(), gvl_file_set_mode(), gvl_file_start_read(), Gvl_get_color_for_value(), gvl_write_char(), int, tools::pos, r, RED_MASK, ResX, ResY, ResZ, slice_get_value(), SLICE_MODE_INTERP_YES, value, X, y, and Y.

Referenced by gvl_slices_calc().

float slice_get_value	(	geovol *	gvl,
		int	x,
		int	y,
		int	z
	)

Get volume value.

Parameters

gvl	pointer to geovol struct
x,y,z

Returns: value

Definition at line 808 of file gvl_calc.c.

References gvl_file_get_data_type(), gvl_file_get_value(), gvl_file_get_volfile(), dialogs::type, and value.

Referenced by slice_calc().

Variable Documentation

int Cols

Definition at line 73 of file gvl_calc.c.

Referenced by alloc_slice_buff(), alloc_vol_buff(), get_slice_value(), get_vol_value(), gvl_isosurf_calc(), gvl_slices_calc(), iso_get_cube_grads(), read_g3d_slice(), and read_g3d_vol().

int Depths

Definition at line 73 of file gvl_calc.c.

Referenced by alloc_vol_buff(), gvl_isosurf_calc(), gvl_slices_calc(), iso_get_cube_grads(), and read_g3d_vol().

double ResX

Definition at line 74 of file gvl_calc.c.

Referenced by gvl_isosurf_calc(), gvl_slices_calc(), iso_get_cube_value(), and slice_calc().

double ResY

Definition at line 74 of file gvl_calc.c.

Referenced by gvl_isosurf_calc(), gvl_slices_calc(), iso_get_cube_value(), and slice_calc().

double ResZ

Definition at line 74 of file gvl_calc.c.

Referenced by gvl_isosurf_calc(), gvl_slices_calc(), iso_get_cube_value(), and slice_calc().

int Rows

Definition at line 73 of file gvl_calc.c.

Referenced by alloc_slice_buff(), alloc_vol_buff(), get_vol_value(), gvl_isosurf_calc(), gvl_slices_calc(), iso_get_cube_grads(), read_g3d_slice(), and read_g3d_vol().

Data Structures

Macros

Functions

Variables

Detailed Description

Macro Definition Documentation

Function Documentation

Variable Documentation