abs
.abs()
Returns the 'absolute' of this number. The absolute is the positive version of a number. So if it is negative, it will return it as a positive value.
For example the absolute of 3 and -3, are both 3.
n = -9.abs() // set to 9
n = 9.abs() // also set to 9Advanced Example
Draws a ball bouncing along the 'absolute' of a sine wave.
x = 100
angle = 0
size = 120
onEachFrame() do |delta|
fill( :green )
angle = angle + delta/30
x = (x + delta*2) % getScreenWidth()
y = getScreenHeight() * angle.sin().abs()
setColor( :white )
fillCircle( x, getScreenHeight() - y, size, :center, :bottom )
// draw the circles ahead and behind, for screen wrapping
fillCircle( x-getScreenWidth(), getScreenHeight() - y,
size, :center, :bottom )
fillCircle( x+getScreenWidth(), getScreenHeight() - y,
size, :center, :bottom )
end
