Drawing an outline around object

OK thanks for clarifying that you want to draw four straight lines, as seen from the camera, in the shape of a box, around some objects.

There's basically two ways to draw lines un Unity.

You can use the LineRenderer which is free with Unity. Simply read the doco, it is very easy to use.

Or you can grab Vectrosity on the asset store for two dollars, which pretty much everyone uses for drawing lines, glowing lines, and the like.

There is a third remarkably easy way:

1. right now in unity in the editor, just "make" a "line". So, make it exactly 10 cm wide, and 1 meter long. Very simply make a "plane" using a silly unity primitive, and stretch it so it is as I describe.

2. it might be easuer for you to make a horizontal one of those, and also a vertical one

3. name those objects say MeterLineH and MeterLineV. (note that this will now have a scale of "1" both ways)

4. carefully make a little system where you supply a length (say "2.3 m"). the system takes your original MeterLineV and simply scales it, in this case simply to 2.3 on the vertical length. Do the same thing for horizontal

5. note that you can color the originals (from point 1) any way you want, etc

6. As you can see, you can now, with one line of code, make horizontal or vertical lines, any length you want, and always a fixed 10cm in width. Voila.

7. just carefully write a routine that makes a BOX from four of those

So really that's how you do it. Note that, FWIW, there's no reason not to use a "cube" in step 1 (stretch it out). Or you could "properly"

Let me finally say - did uou look at Unity's (annoying and crappy) GUI system?

Note that it has stupid features like "box" and so on ...

http://docs.unity3d.com/Documentation/ScriptReference/GUI.html

Be aware it will take you 10x, or 40x longer to use their "GUI" system, than simply do the 7 steps I mention above!

Finally !!!

Funnily enough I had exactly this problem once. Let me dfraw your attention to a great little product on the Asset Store (it's only five bucks!) called "Dynamic Circles" - everyone should have it, it;s so good

notice in this question (similar to yours here), I came to that conclusion

http://answers.unity3d.com/questions/238526/easiest-way-to-make-a-kind-of-glowing-indicator-ar.html

Hope all of this helps in some way! So your solutions are

• LineRenderer of Unity, a bit clunky for this

• learn Vectrosity, the go to solution for glowing lines etc

• surprisingly, just make essentially stretched planes, to make tidy squared-off lines

• note the natty "Dynamic Circles" asset which is neat (since it's only a few bucks, just grab it without hesitation as it's interesting)

Hope this helps! Cheers!