3D 填充图 Mapbox 和 高德地图 统一高度

[lzxue]

AntV Open Source Contribution Plan（可选）

• 我同意将这个 Issue 参与 OSCP 计划

Issue 类型

高级任务

任务介绍

目前对于填充图，在Mapbox 和 高德地图下高度表现不一致。

https://l7.antv.antgroup.com/examples/polygon/3d/#polygon_stylemap
re #1634

参考说明

No response

[weilb]

I have the same problem , Mapbox Instance also has problems with the height of the line wall

[deletenothing]

deletenothing 认领

[zhuyyafd]

zhuyyafd 认领

[lzxue]

@deletenothing @weilb 感谢认领，这块问题是，shader 内部需要处理单位换算，有需要我可以讲解实现机制

[deletenothing]

@deletenothing @weilb 感谢认领，这块问题是，shader 内部需要处理单位换算，有需要我可以讲解实现机制

@lzxue 可以加微信交流一下吗？

[Pureblackkk]

Hi, there. I still found this problem with your new pr code added with Mapbox or TencentMap. I think the problem comes from the wall types vertex shader. In the wall vertex shader the aSize.x being used as the height of the wall, and it'll be converted to the real pixel height in the world coordinates corresponding to the current u_Zoom level when the height is not fixed. After several tries, I found when I fixed the height which will be passed to the fragment shader or invert the coordinates transformation with pow(2.0, u_Zoom - 1), it will be fine or at least not that wired. Though I didn't totally figure out the mechanism of how the coordinates system working in L7 and the difference of it in MapBox, I think it's the problem of zoom level transformation. Looking forward to hearing you suggestion @lzxue

[lzxue]

Are you talking about the Wall layer? I haven't tested the wall layer yet and The wall layer capability is not perfect yet.it still has promblem.

another question：

the case of non-fixed height, the unit is in meters, while for fixed height, it is measured in pixels. this is a design problem with using heightfixed. This is a historical issue. I have long wanted to refactor it. Using heightUnit is more appropriate. I will fix this in the future.

• You can think that the coordinate system of L7 is the same as mapbox, only the Amap map is special.

[Pureblackkk]

I see. What do you mean by height unit, is it kind of the dimensionless quantity which is used commonly for all kinds of coordinate system? Anyway, if you solve this issue I'll definitely glad to see how that works out, and also it's great if you could share more information and knowledge in the future. (Thumb up XD)