fix(pie): pie chart avoidLabelOverlap hides label. close #13938

[Nick22nd]

Brief Information

This pull request is in the type of:

• bug fixing
• new feature
• others

What does this PR do?

fix chart avoidLabelOverlap hides label even when there are lot's of free space.

Fixed issues

• Pie chart avoidLabelOverlap hides label even when there are lot's of free space #13938: Pie chart avoidLabelOverlap hides label even when there are lot's of free space

Details

Before: What was the problem?

dx has the direction(1/-1) presentation, if dx < 0; then dx < rA always be true;
But if (-dx) > rA, there would be square root of negative number.

Math.sqrt(dy * dy / (1 - dx * dx / rA / rA))

rB will get NaN.

After: How is it fixed in this PR?

When comparing, dx => Math.abs(dx)

Usage

Are there any API changes?

• The API has been changed.

Related test cases or examples to use the new APIs

NA.

Others

Merging options

• Please squash the commits into a single one when merge.

Other information

[echarts-bot]

Thanks for your contribution!
The community will review it ASAP. In the meanwhile, please checkout the coding standard and Wiki about How to make a pull request.

[pissang]

Wow thanks for the very neat fix!

[echarts-bot]

Congratulations! Your PR has been merged. Thanks for your contribution! 👍