PI is only used within STemWin.
 
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PI macro

Syntax

#define PI 3.14

References

LocationText
system_win.c:79
#define PI 3.14
system_win.c:215
GUI_RotatePolygon(aPointsDest[0], aPointsDest[0], 4, - 2 * PI * (float)((float)hour + (float)min /60) / 12);
system_win.c:219
GUI_RotatePolygon(aPointsDest[1], aPointsDest[1], 4, - 2 * PI * (float)((float)min + (float)sec / 60) / 60);
system_win.c:223
GUI_RotatePolygon(aPointsDest[2], aPointsDest[2], 4, - 2 * PI * sec / 60);