nvpro-samples / gl_vk_meshlet_cadscene Goto Github PK

Hello;
I compiled one Linux / Fedora 28 with HAS_OPENGL options not Vulkan and then the glsl shader compiler fails with missing values for NVMESHLET_VERTEX_ALIGNMENT and NVMESHLET_PRIM_ALIGNMENT.

Where would I find these values outside of nvmeshlet_utils.glsl? What should they be?

Thank you,

dave

known problem

RT

Built the vulkan only executable and launched with the respective .cfg files. Viewport is non responsive.

OS: Win10 18362.19h1_release.190318-1202
Windows SDK version 10.0.17763.0
Vulkan SDK 1.1.121.2

Had to add
#include <stdexcept>
in deviceutils_vk.cpp to build

PrimitiveCache::maxBlockBits variable is always constant 0xffffffffu.
These don't seem to make any sense, but are they implementation mistakes?

https://github.com/nvpro-samples/gl_vk_meshlet_cadscene/blob/master/nvmeshlet_builder.hpp#L479
https://github.com/nvpro-samples/gl_vk_meshlet_cadscene/blob/master/nvmeshlet_builder.hpp#L537-L556

The packbasic path binds uint[] and uvec2[] arrays to GEOMETRY_SSBO_PRIM, and uses them both. I didn't know this kind of aliasing was legal. What is the reason? The vertex and primitive loops are the heart of the mesh shader but are undocumented, and I can't piece together why these loops, that are seemingly doing different things, are loading from the same aliased data.

What was the reason making this mistake

--> using Vulkan Headers from: C:/VulkanSDK/1.3.211.0/Include
Downloading http://developer.download.nvidia.com/ProGraphics/nvpro-samples/worldcar.csf.gz to C:/Users/Local_Admin/Documents/GitHub/cadScene/downloaded_resources/worldcar.csf.gz
Downloading http://developer.download.nvidia.com/ProGraphics/nvpro-samples/blade.csf.gz to C:/Users/Local_Admin/Documents/GitHub/cadScene/downloaded_resources/blade.csf.gz
Configuring done

empty files are downloaded which fails at run time.

It looks like the path http://developer.download.nvidia.com/ProGraphics/nvpro-samples doesn't exists.

It is possible that a driver supports the required subgroup size extension but doesn't support it for mesh/task.

Was Vulkan SDK 1.3.231.1.

Thanks.