public void setAngle( double angle ) {
		slope.set( Math.cos( angle ), Math.sin( angle ) );
	}
public void setAngle( double angle ) {
		slope.set( Math.cos( angle ), Math.sin( angle ) );
	}
public void setAngle ( double angle ) { slope . set ( Math . cos ( angle ) , Math . sin ( angle ) ) ; }
Sets the slope to the unit vector specified by the provided angle.

@param angle Angle of the line specified in radians.
Sets the slope to the unit vector specified by the provided angle .