Range of view with collision detector

Hi,

I want to made a range of view for my game enemys. Is in construct 2 simple posibility to make something like on image below:

<img src="http://oi57.tinypic.com/2v3n3p0.jpg" border="0" />

Check: Line of sight   (LOS)

I fing this thread - scirra.com/forum/c2enemy-line-of-sight_topic45095.html

But one source died, and second there is not what needs. They make a single line, it's good for game with topview camera. I want made this for side view game, and it's must be something more then single line.

Line of sight in the Manual

You may tried with an invisible sprite pinned to your ennemi and put where your line of sight end. Then test yhis invisible sprite collision with obstacles

Thx all!