ThreeJS vs Three speed

[merco]

Hi this is the same model loaded in ThreeJS (chrome)

2024-10-15-17-10-39.mp4

and this in windows forms opentk control

2024-10-15-17-13-06.mp4

rendering speed seems very different.

could something be optimized?

[hjoykim]

hello
Please, could send your demo model file?

[merco]

@hjoykim here we are!

SourceAndModels.zip

you should be able to create a solution like this, and open a *.s3d file. It contains vertex and positions like the original threejs file.

I can't include Javascrit version because it'a a legacy format and you need SAPUI5 frameowork runtime installed to get a working viewer. Do you think this part is necessary too?

this is the render time: without any user interaction

[merco]

a little improvement can be here...
I'm duplicating materials because I want a selection to have the right instance hilighted
You can try using 2robi.S3D

2024-10-16-08-09-45.mp4

[merco]

I can try also with InstancedMesh and that seems good.
But can I set InstancedMesh visbility, opacity and color each singolar "mesh at position" ?
@hjoykim

But the problem now is that I have some mesh with more than one material... and in this case how can mange only 1 color?

S3DFile.zip

This overload... shows multiple colors (However, they appear dull and not very bright.: probably a mistake in light positioning?)

[merco]

https://medium.com/@pailhead011/instancing-with-three-js-part-2-3be34ae83c57

very interesting but too far from my skills

[hjoykim]

Hello, I'm sorry too late reply

I've checked your demo projects.
additionally it's need to find the problem what caused this low performance.

Could you answer to below my requests of image?

[merco]

the web source is SAPUI5 runtime https://tools.hana.ondemand.com/additional/sapui5-rt-1.127.3.zip
with sap.ui.vk.tutorial.VIT.01 example https://sapui5.hana.ondemand.com/#/entity/sap.ui.vk.tutorial.VIT/sample/sap.ui.vk.tutorial.VIT.01

The source file is a legacy file type that I'd like to migrate in Three C# with a new custom file format. So the web source 3D file isn't exacatly the same, but I'm going to get data from threejs in memory geometries , export them in a binary format and reload in a new c# project as "*.s3d"

This is another example file :
My goal is get geometries from legacy file and create a new file format, fast and light as the original, but in Three C#
1m001934_asm.zip

[hoainamtds]

I'm also having the same performance issue with the gltf file. Here is my file:
Link dropbox: https://www.dropbox.com/scl/fi/cp52hqxj6fhh4a2biukbe/Architecture_Sample_Revit.gltf?rlkey=4ns8wpg4gge542ihw0xm7wc41&st=48mgh4cl&dl=0