Hello.
I found that TMS(Cesium Tile Map Service Raster Overlay) + WMS(Cesium Web Map Service Raster Overlay) overlapping is flikering by camera distance.
I also read the article below. I checked Cesium Ion Raster Overlay + WMS is working fine on Cesium Unity latest (v1.1.0)
Hi,
are their any examples showing how to use WMS or TMS tile services will cesium for unity?
Iām canāt seem to get either the CesiumWebMapServiceRasterOverlay or CesiumTileMapServiceRasterOverlay working with free tile services.
For instance, nasa have a free WMS tile service on the following url but I canāt get it working.
https://svs.gsfc.nasa.gov/cgi-bin/wms
Using that as a tile source prevents cesium from displaying anything no matter which layer you select.
Does cesium for unity workā¦
I wonder if there is any option for it i missed or this is a bug
reproduce issue step. (with Unity 2021.3.10f1)
git clone cesium-unity-samples repo. check out with main branch. (tag: v1.1.0)
open the project, open 02_CesiumMelbourne scene.
remove Cesium Ion Raster Overlay component in Cesium World Terrain object.
add Cesium Tile Map Service Raster Overlay component.
add Cesium Web Map Service Raster Overlay component.
git clone cesium-google-earth-examples repo.
paste local TMS url in Cesium Tile Map Service Raster Overlay component (from cesium-google-earth-examples repo) : D:/cesium-google-earth-examples/Cesium/Assets/Textures/NaturalEarthII/tilemapresource.xml
paste WMS url in Cesium Web Map Service Raster Overlay component : http://geoserver.nationalmap.nicta.com.au/geotopo_250k/ows
paste Layers in Cesium Web Map Service Raster Overlay component : Hydrography:bores
note that if you use online TMS url there is no difference. I used local tms files for testing this without network delay.
I checked terrain tile material when this trouble happened, overlay0Texture is missing.
so I tried to understand with Cesium Native and Cesium Unity code, I havenāt got no clue for this.
somebody help please~
Thanks for the detailed writeup! I was able to reproduce the problem and confirm itās a bug. Iāve opened a pull request with a fix here:
CesiumGS:main ā CesiumGS:remove-correct-overlay-index
opened 09:02AM - 10 May 23 UTC
This fixes the bug reported here:
https://community.cesium.com/t/tms-wms-rasterā¦ -overlay-overlapping-is-flikering/23904
There was a bug in `UnityPrepareRendererResources::detachRasterInMainThread` where it would clear the wrong overlay texture slot in the material. Instead of using the index of the overlay in the list of overlays to look up the correct material texture slot, it would use the overlay texture coordinate index. With only one overlay, these are the same. With two overlays with different sets of texture coordinates (e.g., one web mercator the other geographic), they're also likely to be the same. But with two overlays with the same projection, these numbers are different, and attempts to detach the second texture would accidentally detach the first instead. End result: missing textures.
See the community forum post above for an easy way to test this. You can use `https://sandcastle.cesium.com/CesiumUnminified/Assets/Textures/NaturalEarthII/tilemapresource.xml` for the TMS URL rather than downloading it and loading it locally as described in the post.
1 Like
@Kevin_Ring Thank you!
I tested your fix. this trouble is solved!
by the way I have 2 questions.
I read code in CesiumShaderProperties.cpp there are _overlay0 ~3 Texture set to Shader. so I expect that WMS or TMS overlay can be 4 layer overlapping maximum. Am I right?
and Cesium Ion Raster Overlay is using Bing Map. I wonder networking is whether TMS or not. I didnāt understand exactly.
Yes, thatās right.
and Cesium Ion Raster Overlay is using Bing Map. I wonder networking is whether TMS or not. I didnāt understand exactly.
Sorry I donāt understand what youāre asking here.
