topic Re: JS API 4.10 - Clipping a single layer in ArcGIS JavaScript Maps SDK Questions

JS API 4.10 - Clipping a single layer

RomanKönig — Thu, 20 Dec 2018 09:56:16 GMT

We have the task to display only a small region of a layer (in our case a MapImageLayer) around the mouse, and the visible part should move with the mouse. It is some sort of overlay above the other layers.

In 4.9 we did this by clipping the canvas of this single layer, but since in 4.10 all layers draw on the same canvas we can't do that anymore.

One way we were thinking of is to initialize a second MapView above the first one holding only this single layer.

But that is just our first (and not preferred) idea because of complexity in view handling, event handling, etc.

Does anyone have any ideas how to achieve our goal in 4.10+ ?
Is it possible to force a layer to draw on it's own canvas above the other layers combind canvas?

Re: JS API 4.10 - Clipping a single layer

YannCabon — Thu, 20 Dec 2018 18:07:47 GMT

Hi Roman,

We are designing the API to make such feature possible with the webgl rendering. In 4.10 unfortunately you will have to work around it by handling 2 views.

Yann

Re: JS API 4.10 - Clipping a single layer

RomanKönig — Thu, 04 Apr 2019 13:44:17 GMT

Hi Yann Cabon,
i looked through the API 4.11 documentation and i couldn't find anything about layer clipping.
Can you confirm that this feature didn't make it into 4.11 or if so, point me in the right direction?

Thanks in advance, Roman