NAME¶
ftofix - Converts a floating point value to fixed point. Allegro game
programming library.
SYNOPSIS¶
#include <allegro.h>
fixed ftofix(double x);
DESCRIPTION¶
Converts a floating point value to fixed point. Unlike itofix(), this function
clamps values which could overflow the type conversion, setting `errno' to
ERANGE in the process if this happens. Example:
fixed number;
number = itofix(-40000);
ASSERT(fixfloor(number) == -32768);
number = itofix(64000);
ASSERT(fixfloor(number) == 32767);
ASSERT(!errno); /* This will fail. */
RETURN VALUE¶
Returns the value of the floating point value converted to fixed point clamping
overflows (and setting `errno').
SEE ALSO¶
fixtof(3alleg4), itofix(3alleg4), fixtoi(3alleg4),
exfixed(3alleg4), exrotscl(3alleg4), exspline(3alleg4),
exupdate(3alleg4)
