fix(scale): #20265 when dataZomm.filterMode is “empty” or ‘none’， the line graph is scaled to only one category, it is not filtered correctly

[linlang171]

Brief Information

This pull request is in the type of:

• bug fixing
• new feature
• others

What does this PR do?

fix bug #20265 issue

Fixed issues

#20265 : datazoom.filterMode设为'empty'时line图在缩放至只剩一条数据时所有数据都依旧会渲然，未依照empty的规则进行筛选。

Details

Before: What was the problem?

when dataZomm.filterMode is “empty” or ‘none’， the line graph is scaled to only one category, it is not filtered correctly

After: How does it behave after the fixing?

The data is correctly filtered. And The bug is caused by calling the normalize method when calculating rendering values. When extra [1]==extra [0], it does not consider the possibility of NaN and returns 0.5 directly

Document Info

One of the following should be checked.

• This PR doesn't relate to document changes
• The document should be updated later
• The document changes have been made in apache/echarts-doc#xxx

Misc

ZRender Changes

• This PR depends on ZRender changes (ecomfe/zrender#xxx).

Related test cases or examples to use the new APIs

N.A.

Others

Merging options

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

Other information

[echarts-bot]

Thanks for your contribution!
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⚠️ MISSING DOCUMENT INFO: Please make sure one of the document options are checked in this PR's description. Search "Document Info" in the description of this PR. This should be done either by the author or the reviewers of the PR.

[echarts-bot]

Document changes are required in this PR. Please also make a PR to apache/echarts-doc for document changes and update the issue id in the PR description. When the doc PR is merged, the maintainers will remove the PR: awaiting doc label.