After version 1.96 some 3dtiles display is not normal

[hemincan]

Sandcastle example:this is example

But it is displayed normally in 1.96 and below.

[ggetz]

Thanks for the report @hemincan. I can confirm this is a bug after we overhauled glTF loading.

[jinjun1994]

same problem

[jinjun1994]

How to fix this bug? I am in a hurry. @ggetz

[jinjun1994]

I want to fix this bug, could you give me some clues as I cannot locate it? Thank you very much! @ggetz

[ggetz]

Hi @jinjun1994, this would likely need further debugging to determine the exact issue. I would begin looking in GltfLoader which loads the glTF embedded in the tile, and creates the resources needed to render the glTF. Then ModelSceneGraph prepares the resources for rendering.

[jinjun1994]

@ggetz

The issue may be related to the size of the index buffer？ Under the new glTF loader architecture, the glTF file is not displayed. The command is "drawElements: TRIANGLES, 269259, 5125 (UNSIGNED_INT), 0". However, when changed to "UNSIGNED_SHORT", although the object is deformed, it is displayed.

[luolihui119]

Hi @jinjun1994 ，Have you found a solution yet？Cesium version is 1.102

[luolihui119]

This issue is related to the index buffer.This could be the reason： GltfLoader Line 1253 : indices.count = accessor.count; this count is not equal to indexBufferLoader.buffer.numberOfIndices;

[MSNjojo]

This issue is related to the index buffer.This could be the reason： GltfLoader Line 1253 : indices.count = accessor.count; this count is not equal to indexBufferLoader.buffer.numberOfIndices;

yes, here is my work around context.js count = defaultValue(count, indexBuffer.numberOfIndices); => count = indexBuffer.numberOfIndices;

I guess there are some errors in model loader or the process of parsing data. It results in numberOfIndices not equal to count