dgoldberg/streamice/phi_gl_streamice.F

#include "CPP_OPTIONS.h"

      _RL FUNCTION PHI_GL_STREAMICE (X, W)

!      This function returns a "smoothed indicator function"
!      that is zero when x<0, 1 when x>w/2, and continuously diff.

       _RL X, W 
       _RL TMP1, PI

       IF (X<0.0) THEN
         PHI_GL_STREAMICE = 0.0
       ELSEIF(X>W/2.0) THEN
         PHI_GL_STREAMICE = 1.0
       ELSE
         PI = 3.14159265358979323844D0
         TMP1 = COS (2*PI*X/W)
         PHI_GL_STREAMICE = 0.5 * (1-TMP1)
       ENDIF

       RETURN
       END 
1	dgoldberg	1.1	#include "CPP_OPTIONS.h"
2
3			_RL FUNCTION PHI_GL_STREAMICE (X, W)
4
5			! This function returns a "smoothed indicator function"
6			! that is zero when x<0, 1 when x>w/2, and continuously diff.
7
8			_RL X, W
9			_RL TMP1, PI
10
11			IF (X<0.0) THEN
12			PHI_GL_STREAMICE = 0.0
13			ELSEIF(X>W/2.0) THEN
14			PHI_GL_STREAMICE = 1.0
15			ELSE
16			PI = 3.14159265358979323844D0
17			TMP1 = COS (2PIX/W)
18			PHI_GL_STREAMICE = 0.5 * (1-TMP1)
19			ENDIF
20
21			RETURN
22			END