GRASS GIS 7 Programmer's Manual
7.9.dev(2021)-e5379bbd7
Main Page
Related Pages
+
Data Structures
Data Structures
Class Hierarchy
+
Data Fields
+
All
a
b
c
d
e
f
g
h
i
k
l
m
n
o
p
q
r
s
t
u
v
w
x
y
z
~
+
Functions
a
b
c
d
e
f
g
h
i
k
l
m
n
o
p
q
r
s
t
u
v
w
~
+
Variables
a
b
c
d
e
f
g
h
i
k
l
m
n
o
p
q
r
s
t
u
v
w
x
y
z
Related Functions
+
Files
File List
+
Globals
+
All
_
a
b
c
d
e
f
g
h
i
j
k
l
m
n
o
p
q
r
s
t
u
v
w
x
y
z
+
Functions
_
a
b
c
d
e
f
g
h
i
k
l
m
n
o
p
q
r
s
t
u
v
w
x
y
z
+
Variables
_
a
b
c
d
e
f
g
h
i
l
m
n
o
p
r
s
t
u
w
x
y
+
Typedefs
a
b
c
d
e
f
g
h
i
j
k
l
m
o
p
r
s
t
u
v
w
y
z
+
Enumerations
a
c
d
e
h
l
m
n
o
p
r
s
t
v
y
+
Enumerator
a
b
c
d
e
f
g
h
i
l
m
n
o
p
r
s
t
u
v
w
+
Macros
_
a
b
c
d
e
f
g
h
i
k
l
m
n
o
p
q
r
s
t
u
v
w
x
y
z
•
All
Data Structures
Files
Functions
Variables
Typedefs
Enumerations
Enumerator
Friends
Macros
Pages
xcos.c
Go to the documentation of this file.
1
2
#include <math.h>
3
4
#include <
grass/gis.h
>
5
#include <
grass/raster.h
>
6
#include <
grass/calc.h
>
7
8
/**********************************************************************
9
cos(x)
10
11
if floating point exception occurs during the evaluation of cos(x)
12
the result is NULL
13
14
note: x is in degrees.
15
**********************************************************************/
16
17
#define DEGREES_TO_RADIANS (M_PI / 180.0)
18
19
int
f_cos
(
int
argc,
const
int
*argt,
void
**args)
20
{
21
DCELL
*res = args[0];
22
DCELL
*arg1 = args[1];
23
int
i;
24
25
if
(argc < 1)
26
return
E_ARG_LO
;
27
if
(argc > 1)
28
return
E_ARG_HI
;
29
30
if
(argt[0] !=
DCELL_TYPE
)
31
return
E_RES_TYPE
;
32
33
if
(argt[1] !=
DCELL_TYPE
)
34
return
E_ARG_TYPE
;
35
36
for
(i = 0; i <
columns
; i++)
37
if
(
IS_NULL_D
(&arg1[i]))
38
SET_NULL_D
(&res[i]);
39
else
{
40
floating_point_exception
= 0;
41
res[i] = cos(arg1[i] *
DEGREES_TO_RADIANS
);
42
if
(
floating_point_exception
)
43
SET_NULL_D
(&res[i]);
44
}
45
46
return
0;
47
}
DCELL
double DCELL
Definition:
gis.h:603
E_ARG_TYPE
Definition:
calc.h:14
E_ARG_HI
Definition:
calc.h:13
columns
int columns
Definition:
calc.c:12
floating_point_exception
volatile int floating_point_exception
Definition:
calc.c:9
raster.h
gis.h
DEGREES_TO_RADIANS
#define DEGREES_TO_RADIANS
Definition:
xcos.c:17
DCELL_TYPE
#define DCELL_TYPE
Definition:
raster.h:13
f_cos
int f_cos(int argc, const int *argt, void **args)
Definition:
xcos.c:19
E_ARG_LO
Definition:
calc.h:12
IS_NULL_D
#define IS_NULL_D(x)
Definition:
calc.h:30
E_RES_TYPE
Definition:
calc.h:15
SET_NULL_D
#define SET_NULL_D(x)
Definition:
calc.h:34
calc.h
lib
calc
xcos.c
Generated on Mon May 31 2021 05:21:32 for GRASS GIS 7 Programmer's Manual by
1.8.13