Is there a way to have line renderer on a canvas?

Question

i'd love to know if there was a way to get my lineRenderer on a canvas (or some other way to draw lines on a canvas)

Answer 1

Answer by EdwinChua · Apr 11, 2017 at 01:46 AM

If anyone's still looking for the answer: https://forum.unity3d.com/threads/render-lines-on-top-of-panel-ui-element.287023/

Use "Screen Space - Camera", assign the camera, and increase the width of the line so it becomes visible.

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nieyoub23 · Apr 26, 2017 at 05:26 PM 0

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THANK YOU!

Harinezumi · Jul 02, 2017 at 12:43 PM 0

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That was the solution I was looking for the past 2 hours! Thank you!

Answer 2

Answer by filip_andry · Aug 13, 2016 at 08:44 AM

Hi just use a panel filled with any color you want and use Height and Widith to set the length and the widith of your line,

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i3130002 · Jul 24 at 09:33 AM 0

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I spend hours going went down this rabbit hole, wish you had been provided a sample code.

DenisK_WRG i3130002 · Aug 01 at 07:31 PM 0

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I guess he suggests not very optimal way to draw with empty Image line line. But it's fit to draw single line (like progress for example).

Answer 3

Answer by Mmmpies · Jun 11, 2016 at 11:21 AM

Just tried this and it simply doesn't render on the UI. I can see the line on the canvas exactly where I expect in the scene view but it's not there on the Game view.

However whilst looking at why it wasn't rendering I came across this page ...

http://forum.unity3d.com/threads/new-ui-and-line-drawing.253772/

Maybe that'll help.

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pradip_spixel · Aug 03, 2018 at 06:03 AM 0

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can i draw multiple line using line renderer???

Harinezumi pradip_spixel · Aug 03, 2018 at 07:39 AM 0

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First, please don't ask new questions in comments, instead ask a new question - it is free.

Anyway, the answer is no, unless you use a hack. The moment you change the position of points, it will render in a different place.

The hack would be to add the last point of each line again with a fully transparent color, and then add a point for the first point of the next line, also transparent, then you start adding the points of the second line, and so on. Basically you create single line, but with transparent segments to separate parts. But I don't recommend this, because I'm almost certain it is less efficient than multiple LineRenderers.

Answer 4

Answer by lampyridae · Nov 09, 2018 at 03:55 PM

I ran across two other solutions not mentioned here while looking for a way to draw lines in a UI canvas. These solutions probably don't apply to all situations, but they may be helpful to some.

Render Texture Solution

Create a Render Texture in your assets.
Create a second camera in your scene.
In your second camera's Target Texture option, specify your new Render Texture.
Assemble your Line Renderer and some background Quad some distance away from your GameObjects. Make your second camera watch that.
Create a Raw Image in your Canvas and have it render your Render Texture.

Low Level Graphics Solution

Use Unity's low level graphics library: GL.

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Answer 5

Answer by unity_LmmLqTPyJHdvDg · Jan 10 at 09:45 AM

Nothing works for me... I have the canvas on the camera, the z axis, the material and all but I still can't figure out why I'm unable to see the lines in the gamemode.

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DenisK_WRG · Aug 01 at 07:33 PM 0

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Maybe clip plane property of camera (canvas)?

Is there a way to have line renderer on a canvas?

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