public Line2 perpendicular( Vec2 direction )
{
// return a normal vector from this line, generally pointing in the direction provided
Vec2 normal = new Vec2( -direction.y, direction.x );
double directionality = normal.dot( direction );
if( directionality >= 0 )
return new Line2( v1, v1 + normal * distance );
else
return new Line2( v1, v1 - normal * distance );
}
public Line2 offset( double distance, Vec2 direction )
{
// make a normal vector
Vec2 normal = new Vec2( -this.direction.y, this.direction.x );
// make sure its in the same direction as the direction hint vector
if( normal.dot( direction ) < 0.0 )
normal = normal * -1;
// now create an offset line
Vec2 offset = normal * distance;
return new Line2( v1 + offset, v2 + offset );
}