How to draw a line?

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This more a "yes or no" question than an actual question. I'm working on a game where the player can select elements. When he clicks on elements I draw a line between the previous selection and a the new one. I'm currently using the Debug.Drawline function to display the link between chosen elements but I need a final method.

My idea is to import a quad from Blender (to avoid using Unity planes which are full of vertex) scale it, rotate it, and display it always facing the camera.

My question: Is it the good technique to display lines or is there other techniques?

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Answer by Common_Horse · Jun 25, 2012 at 07:00 AM

You can use line renders, which allow you to define a start and end point, as well as width. This is generally more simple than using a quad, but I think it may be less efficient.

-AJ

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Mizuho · Jun 25, 2012 at 07:14 AM 0

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It is less efficient because it requires the space for the GameObject and Component to hold it.

Common_Horse · Jun 25, 2012 at 07:20 AM 0

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True, but wouldn't you normally need to have a game object and mesh render component if you were to do it with a quad?

Mizuho · Jun 25, 2012 at 07:22 AM 0

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Unless you had Unity Pro, in which case it is drawn directly without anything to hold it.

lvictorino · Jun 25, 2012 at 07:28 AM 1

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@$$anonymous$$izuho @ArielJohnson I've tried Line renderer technique... but it seem to not always facing camera (example where I expect to have a square drawn: http://delta.riskle.com/~larles/unityline.JPG ) Is there something to know with LineRenderer while using an orthographic camera?

Mizuho · Jun 25, 2012 at 08:20 AM 1

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@lvictorino: You only need one LineRenderer to get a square. It's a bit of a trick because the LineRenderer rotates its lines by 90 degrees for every additional segment added to it, so if you draw over the same path four times, it looks like a solid line to the camera.

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How to draw a line?

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