How do I make a laser sight?

Am trying to add a laser guide to a gun. I want the laser to stretch until it collides with anything on the layer. but the problem is i have no idea what to do and i cant find any tutorials to help me on this. Also if you do know how to do this could you explain how it works too?

This a sample I had saved from a public posting. I did not write it but, should get you started.

Gravitycat

this is a very basic one...

TheDom

i wont recomend using this method... its more cpu intensive...at least for mobile, it works very well, but my method is more optimize... no offense

Non taken and thanks for sharing

Thank you so much Lunatrap it works great.

Gravitycat

NP

I didn't check lunatrap's capx (don't have the latest c2 installed), but if it's not using rex's light behaviour then I'd recommend you use that instead of an event-based solution - it's much easier & seems more efficient with lots of laser bounces:

Just apply the Light behaviour to your laser sprite (a thin sprite with the origin at the left side), & with one action it will extend towards a custom obstacle or a sprite with the solid behaviour. You can do this every tick or manually.

After the laser has hit, you then get the hit object's UID, hitX, hitY & a reflection angle (eg. to pick the hit object you would do: Spritename | Pick instance with UID Laser.Light.HitUID)