point2line
index		  
Name flip ( )
Description Flips the vector 180 degrees from it's forward angle.
Syntax 
flip();
Returns None
Usage Web & Application
Related
Examples 
import point2line.*;

Vect2 velocity = new Vect2( 0, 1 );

println( degrees( velocity.angle() ) );  // prints "90.0"

velocity.flip();

println( degrees( velocity.angle() ) );  // prints "270.0"