[BUG] Chart is not displayed when lineArc is set to true

[Artfloriani]

Expected Behavior

Chart should be drawn even with lineArc set to true.

Current Behavior

After ChartJS 2.4.0, when setting lineArc to true the chart is not diplayed.

Steps to Reproduce (for bugs)

2.5.0 https://jsfiddle.net/hvenb74o/5/ -- BUG
2.4.0 https://jsfiddle.net/hvenb74o/6/ -- Working

Context

I'm working on an app that does need a Chart with a rounded arc instead of the default one. Using 2.4.0 is not ideal for me as there are bugs that are present on 2.4.0 and I do need to create plenty of hacks in order to have it working.

Environment

• Chart.js version: 2.5.0
• Browser name and version: Chrome 56

[etimberg]

@Artfloriani the lineArc setting was a poorly named setting that controlled how points were interpreted and was required to be false for a radar chart.

However, we merged #3782 recently which fixes this. It's not released yet but you can build master and see how it goes.

[Artfloriani]

@etimberg Thanks for the updated. Just checked and it is working fine from the master branch.

Would it be possible to draw the radar chart without the internal gridLines but with the border of the circular chart?

[etimberg]

Yes, but it's cumbersome. I think you would need to specify the grid line colours as an array and then have all but the last value be 'transparent'

[Artfloriani]

@etimberg Worked like a charm, cheers 👍