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The PC-SIG Library 9
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DISK0875
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CLKHRH.C
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1987-10-25
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2KB
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52 lines
/***************************************************** CLKHRH.C
* NAME: CLKHRH
*
* FUNCTION: Computes hour hand
*
* EXAMPLE: CLKHRH();
*
* INPUTS: determined from global variables
* acthr, hrwth, lasthr, thishr
*
* OUTPUT: placed into global variables
* acbhr, acdhr
*
**************************************************************
* 11/22/86 -RBM- original implementation
* 10/25/87 -RBM- fixed bug imaging 12:00 hand
**************************************************************/
#define XTRNALGLOBALS 1 /* globals externally defined */
#include "E:CLKGBL.H" /* setup global storage */
/**************************************************************
* BEGIN ROUTINE
**************************************************************/
clkhrh()
{
int i; /* temporary counter */
int blkhnd; /* blanking hand (area to blank out) */
struct ACTIMAGE *imgptr; /* pointer to hand image structure */
if (lastmn != thismn) /* active only when min changes */
{
change = 1; /* show hands changed */
/*--- determine which hand to use ---*/
if (thishr == 12) i = 0;
else i = thishr;
acthr = ((int)(i*5)) + ((int)(thismn/10));
if (acthr >= 60) acthr = 59;
/*--- determine what to blank --------*/
blkhnd = acthr - 1;
if (blkhnd < 0) blkhnd = 59;
/*--- build hour hand images ---------*/
imgptr = &acbhr[0];
clkimgh (imgptr, blkhnd); /* image blanking */
imgptr = &acdhr[0];
clkimgh (imgptr, acthr); /* image drawing */
};
} /***** end of routine ******/