type:surface在x,y轴为category情况下，visualMap颜色无法准确对应

[loadingjoke]

What problem does this feature solve?

能支持x,y为类别情况下的surface图表

What does the proposed API look like?

visualMap添加支持surface不为曲面的选项就行

[echarts-bot]

Hi! We've received your issue and please be patient to get responded. 🎉
The average response time is expected to be within one day for weekdays.

In the meanwhile, please make sure that you have posted enough image to demo your request. You may also check out the API and chart option to get the answer.

Have a nice day! 🍵

[loadingjoke]

而且3d好像无法添加marline或markarea,希望能添加上，至少可以一定程度上替代visualMap的分类功能

[github-actions]

This issue has been automatically marked as stale because it did not have recent activity. It will be closed in 7 days if no further activity occurs. If you wish not to mark it as stale, please leave a comment in this issue.

[github-actions]

This issue has been automatically closed because it did not have recent activity. If this remains to be a problem with the latest version of Apache ECharts, please open a new issue and link this to it. Thanks!