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Issue rendering outlines for polygons with many positions

See original GitHub issue

As you can see in the screenshot there seems to be a problem rendering outlines for polygons with many positions (34000 positions in the hierarchy with extrudedHeight in this case):

2019-02-26_13-08

Green: 32000 positions, rendering ok w/ outlines Yellow: 34000 positions, rendering ok w/o outline Red: 34000 positions, rendering fails w/ outlines

Yellow and red have the same geometry.

Solid shapes seem to work but it looks like Cesium doesn’t connect the outlines right - at some point it seems they’re getting closed although they don’t enclose the complete geometry.

The Sandcastle example below uses the Entity API but the issue also exists with the Primitive API (using PolygonOutlineGeometry).

Sandcastle example:

https://cesiumjs.org/Cesium/Build/Apps/Sandcastle/index.html#c=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

Browser: Chrome 72 & Firefox 65

Operating System: Ubuntu 18.04.2 LTS

Issue Analytics

State:
Created 5 years ago
Comments:5 (4 by maintainers)

Top GitHub Comments

1reaction

jbo023commented, Feb 26, 2019

The problem is in the following line

https://github.com/AnalyticalGraphicsInc/cesium/blob/master/Source/Core/PolygonOutlineGeometry.js#L200

If the line

        var indices = IndexDatatype.createTypedArray(length, indicesSize);

is changed to

        var indices = IndexDatatype.createTypedArray(length + cornersLength, indicesSize);

The Outline geometry is correct.

The function IndexDatatype.createTypedArray returns a UINT16Array which is not enough for the index range of 0 to 68000 (points + cornerPoints)

I could create a Pullrequest tomorrow

0reactions

ulrichsoncommented, Feb 27, 2019

Thanks @hpinkos @jbo023 for the quick fix!

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