method
Math.sign
Math.sign(x) -> int
Returns -1 when x is negative, 1 when it is positive, and 0 when it is exactly zero. It works on both int and fixed values, since zero and sign are the same in Q16.16. Multiply a step by Math.sign(dx) to move one unit toward a target, or read the sign of a velocity to decide which way a sprite faces.
Parameters
xthe value to testExample
program FaceTarget {
var x: int = 8
var target: int = 20
handler StepToward phase Update {
x = x + Math.sign(target - x) # +1 while target is to the right
}
}