Error rendering model

[joaomlap]

Hi,

Not sure if this is helpful at all but while following the steps here:
https://www.kitware.com/vtk-wasm-and-its-trame-integration/

I was able to render some parts of my big-ish model but when trying to render the full thing I got some errors:

Python Server:

 JS Error => 2024-10-29 16:11:06.364 (  78.142s) [          401734]vtkGenericDataArray.txx:378    ERR| vtkTypeInt64Array (0xffe85080): Unable to allocate 476064 elements of size 8 bytes.
 JS Error => WASM update failed
 JS Error => RuntimeError: null function or function signature mismatch

Browser console;

2024-10-29 16:27:10.215 (  76.527s) [          401734]vtkGenericDataArray.txx:378    ERR| vtkTypeInt64Array (0xffe850e8): Unable to allocate 476064 elements of size 8 bytes. 
overrideMethod @ hook.js:608
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hook.js:608 WASM update failed
overrideMethod @ hook.js:608
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trame_vtklocal.umd.js:1 4293415576
hook.js:608 RuntimeError: null function or function signature mismatch
    at vtkWasmSceneManager.wasm:0xa84d04
    at vtkWasmSceneManager.wasm:0xfbdd5a
    at dynCall (vtkWasmSceneManager.mjs:9:73159)
    at vtkWasmSceneManager.mjs:9:73240
    at Object.startEventLoop (eval at newFunc (vtkWasmSceneManager.mjs:9:68337), <anonymous>:8:10)
    at trame_vtklocal.umd.js:1:7497

[jourdain]

Can you describe the geometry in question? Multi-block, number of blocks, number of cells, number of points...
Just so we have some idea of what you are talking about in term of big-ish model?

[jspanchu]

@joaomlap I think your mesh is really big. The error basically says that VTK failed to allocate almost 3.6 GB for cell array connectivity (or offsets in a vtkCellArray because the data type is vtkTypeInt64Array) Since the memory limit in wasm32 is 4GB it is quite easy for applications to run out of memory. I guess the extra 400 megabytes were either used up for the points of your mesh or for small allocations internal to VTK used to store the state/blobs in C++ object manager memory.

@jourdain We need a way for trame to optionally use wasm64.

[jourdain]

Yes we will enable such option once wasm64 is more widely supported