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?

I have a similar type of game, and LineRenderer works pretty well. There's no significant problems with using LineRenderer as long as you don't have hundreds or thousands of lines.

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Well, here's my standard link: [Vectrosity][1]. [1]: http://www.starscenesoftware.com/vectrosity.html

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@Eric5h5: You and your paid solutions. I think a lot of us happen to be Scrooges. Well, I'd like to think that.

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That's why I don't post them as answers. I've written quite a lot of free scripts on the wiki which I also link to. Fortunately many people are not Scrooges.

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the price is too low, the only problem with most Asset store products

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1 Answer

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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

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

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

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@Mizuho @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?

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@lvictorino: You can't have more than two points on the line for the line bends. There are only two ways to do it: 1. Cross over the same line FOUR times. 2. Use two LineRenderers, each belonging to their own GameObject.

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@Mizuho I'm sorry but I don't understand your solution. How can I get a square with only two LineRenderers ?

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