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winex11: wintab.c: use atan2 instead of atan.

This commit is contained in:
Dan Kegel 2008-03-06 12:33:09 -08:00 committed by Alexandre Julliard
parent 81e0ef44e9
commit 1eba6c7644
1 changed files with 6 additions and 27 deletions
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33
dlls/winex11.drv/wintab.c
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@ -742,35 +742,14 @@ void X11DRV_LoadTabletInfo(HWND hwnddefault)
static int figure_deg(int x, int y)
{
int rc;
float angle;
if (y != 0)
{
rc = (int) 10 * (atan( (FLOAT)abs(y) / (FLOAT)abs(x)) / (3.1415 / 180));
if (y>0)
{
if (x>0)
rc += 900;
else
rc = 2700 - rc;
}
else
{
if (x>0)
rc = 900 - rc;
else
rc += 2700;
}
}
else
{
if (x >= 0)
rc = 900;
else
rc = 2700;
}
angle = atan2((float)y, (float)x);
angle += M_PI_2;
if (angle <= 0)
angle += 2 * M_PI;
return rc;
return (0.5 + (angle * 1800.0 / M_PI));
}
static int get_button_state(int curnum)