iscatt_structs.c File Reference

Imagery library - functions for manipulation with structures used by wx.iscatt (wx Interactive Scatter Plot Tool) More...

#include <math.h>
#include <grass/imagery.h>
#include <grass/gis.h>

Include dependency graph for iscatt_structs.c:

Go to the source code of this file.

Functions
int	I_id_scatt_to_bands (const int scatt_id, const int n_bands, int *b_1_id, int *b_2_id)
	Compute band ids from scatter plot id. More...
int	I_bands_to_id_scatt (const int b_1_id, const int b_2_id, const int n_bands, int *scatt_id)
	Compute scatter plot id from band ids. More...
void	I_sc_init_cats (struct scCats *cats, int n_bands, int type)
	Initialize structure for storing scatter plots data. More...
void	I_sc_free_cats (struct scCats *cats)
	Free data of struct scCats, the structure itself remains allocated. More...
int	I_sc_add_cat (struct scCats *cats)
	Add category. More...
int	I_sc_insert_scatt_data (struct scCats *cats, struct scdScattData *scatt_data, int cat_id, int scatt_id)
	Insert scatter plot data . Inserted scatt_data struct must have same type as cats struct (SC_SCATT_DATA or SC_SCATT_CONDITIONS). More...
void	I_scd_init_scatt_data (struct scdScattData *scatt_data, int type, int n_vals, void *data)
	Insert scatter plot data. More...

Detailed Description

Imagery library - functions for manipulation with structures used by wx.iscatt (wx Interactive Scatter Plot Tool)

Copyright (C) 2013 by the GRASS Development Team

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

Author

Stepan Turek stepa.nosp@m.n.tu.nosp@m.rek@s.nosp@m.ezna.nosp@m.m.cz (GSoC 2013, Mentor: Martin Landa)

Definition in file iscatt_structs.c.

Function Documentation

I_bands_to_id_scatt()

int I_bands_to_id_scatt	(	const int	b_1_id,
		const int	b_2_id,
		const int	n_bands,
		int *	scatt_id
	)

Compute scatter plot id from band ids.

See also I_id_scatt_to_bands

Parameters

	b_1_id	id of band1
	b_1_id	id of band2
	n_bands	number of bands
[out]	scatt_id	scatter plot id

Returns

0

Definition at line 70 of file iscatt_structs.c.

I_id_scatt_to_bands()

int I_id_scatt_to_bands	(	const int	scatt_id,
		const int	n_bands,
		int *	b_1_id,
		int *	b_2_id
	)

Compute band ids from scatter plot id.

Scatter plot id describes which bands defines the scatter plot.

Let say we have 3 bands, their ids are 0, 1 and 2. Scatter plot with id 0 consists of band 1 (b_1_id) 0 and band 2 (b_2_id) 1. All scatter plots: scatt_id b_1_id b_2_id 0 0 1 1 0 2 2 1 2

Parameters

	scatt_id	scatter plot id
	n_bands	number of bands
[out]	b_1_id	id of band1
[out]	b_2_id	id of band2

Returns

0

Definition at line 41 of file iscatt_structs.c.

Referenced by I_sc_insert_scatt_data().

I_sc_add_cat()

int I_sc_add_cat

(

struct scCats *

cats

)

Add category.

Category represents group of scatter plots.

Parameters

cats	pointer to scCats struct

Returns

assigned category id (starts with 0)

-1 if maximum number of categories was reached

Definition at line 155 of file iscatt_structs.c.

References scCats::cats_arr, scCats::cats_ids, scCats::cats_idxs, G_malloc, G_zero(), scCats::n_a_cats, scScatts::n_a_scatts, scCats::n_cats, scCats::n_scatts, scScatts::scatt_idxs, scScatts::scatts_arr, and scScatts::scatts_bands.

I_sc_free_cats()

void I_sc_free_cats

(

struct scCats *

cats

)

Free data of struct scCats, the structure itself remains allocated.

Parameters

cats	pointer to existing scCats struct

Definition at line 119 of file iscatt_structs.c.

References scCats::cats_arr, scCats::cats_ids, scCats::cats_idxs, G_free(), scCats::n_a_cats, scCats::n_bands, scCats::n_cats, scCats::n_scatts, scScatts::scatt_idxs, scScatts::scatts_arr, scScatts::scatts_bands, and scCats::type.

I_sc_init_cats()

void I_sc_init_cats	(	struct scCats *	cats,
		int	n_bands,
		int	type
	)

Initialize structure for storing scatter plots data.

Parameters

cats	pointer to scCats struct
n_bands	number of bands
type	SC_SCATT_DATA - stores scatter plots
type	SC_SCATT_CONDITIONS - stores selected areas in scatter plots

Definition at line 89 of file iscatt_structs.c.

I_sc_insert_scatt_data()

int I_sc_insert_scatt_data	(	struct scCats *	cats,
		struct scdScattData *	scatt_data,
		int	cat_id,
		int	scatt_id
	)

Insert scatter plot data . Inserted scatt_data struct must have same type as cats struct (SC_SCATT_DATA or SC_SCATT_CONDITIONS).

Parameters

cats	pointer to scCats struct
scarr_data	pointer to scdScattData struct
cat_id	id number of category
scatt_id	id number of scatter plot

Returns

0 on success

-1 on failure

Definition at line 208 of file iscatt_structs.c.

References scdScattData::b_conds_arr, scCats::cats_arr, scCats::cats_idxs, I_id_scatt_to_bands(), scScatts::n_a_scatts, scCats::n_bands, scCats::n_cats, scCats::n_scatts, SC_SCATT_CONDITIONS, SC_SCATT_DATA, scScatts::scatt_idxs, scdScattData::scatt_vals_arr, scScatts::scatts_arr, scScatts::scatts_bands, and scCats::type.

I_scd_init_scatt_data()

void I_scd_init_scatt_data	(	struct scdScattData *	scatt_data,
		int	type,
		int	n_vals,
		void *	data
	)

Insert scatter plot data.

Parameters

scatt_data	pointer to existing struct scdScattData
type	SC_SCATT_DATA for scatter plots or SC_SCATT_CONDITIONS for selected areas in scatter plot
n_vals	number of data values
data	array of values (unsigned char for SC_SCATT_CONDITIONS, unsigned int for SC_SCATT_DATA)

Definition at line 259 of file iscatt_structs.c.