GeometryInstance in batching - how does it work?

CesiumJS
1

Hi,

I have been offline for two weeks, and I see that a new class,

GeometryInstance has been introduced, which has to be used to create
a primitive now. whereas previously I could use:

var geometry = new Cesium.PolygonGeometry(opts);

var primitive = new Cesium.Primitive({

    geometries :  [ geometry ],

    appearance : appearance

};

primitives.add(primitive);

now I'm trying:

var primitive = new Cesium.Primitive({

    geometryInstances :  [ new Cesium.GeometryInstance({ geometry:

geometry }) ],

    appearance : appearance

};

primitives.add(primitive);

I'm getting errors:

Uncaught DeveloperError:
Invalid renderState.blending.equationRgb.
Error at new DeveloperError
(lib/Cesium/Source/Core/DeveloperError.js:44:22) at new
RenderState (lib/Cesium/Source/Renderer/RenderState.js:176:19) at
Context.createRenderState
(lib/Cesium/Source/Renderer/Context.js:1801:22) at
Primitive.update (lib/Cesium/Source/Scene/Primitive.js:393:34) at
CompositePrimitive.update
(lib/Cesium/Source/Scene/CompositePrimitive.js:403:27) at
Scene.render (lib/Cesium/Source/Scene/Scene.js:543:26) at
declare.render
(lib/Cesium/Source/Widgets/Dojo/CesiumViewerWidget.js:1178:24) at
declare.updateAndRender
(lib/Cesium/Source/Widgets/Dojo/CesiumViewerWidget.js:1203:18) at
updateAndRender
(lib/Cesium/Source/Widgets/Dojo/CesiumViewerWidget.js:1227:24) RenderState.js:176

what am I doing wrong?

Akos

but this gives me errors :(
2

Hi Akos,

Your code looks right. It looks like the problem is with the appearance. We also moved to separate appearances classes. The joy of being on the bleeding edge.

I updated the Wall Sandcastle example in the batching branch. Have a look and let me know if you need more help syncing up your code.

Patrick

3

Patrick,

Your code looks right. It looks like the problem is with the
appearance. We also moved to separate appearances classes. The joy
of being on the bleeding edge.

:slight_smile:

it seems that it was the pickData attribute again - as soon as I added
pickData to the GeometryInstance constructor, everything was working
fine again.

I updated the Wall Sandcastle example in the batching branch. Have a
look and let me know if you need more help syncing up your code.

will look at it, thanks.

Akos

4

Good eye. I still haven’t gotten to matching up the vertex formats yet. I’ll let you know when that is in.

Patrick