[Imstk-developers] How to compile shader code in CMake?

[Milef, Nicholas Boris]

What I understand is that I need to make a custom target to attach this command to (is this correct?):
https://stackoverflow.com/a/30734105

The file I'm working in only has an executable, but the shaders don't need to be compiled before building the executable:
https://gitlab.kitware.com/iMSTK/iMSTK/blob/master/Examples/Sandbox/CMakeLists.txt
________________________________
From: Dzenan Zukic [dzenan.zukic at kitware.com]
Sent: Wednesday, August 09, 2017 10:13 PM
To: Milef, Nicholas Boris
Cc: imstk-developers at imstk.org
Subject: Re: [Imstk-developers] How to compile shader code in CMake?

Yes, CMake documentation is one of the worst. You should look for "cmake add_custom_command example", one of the first hits is this<https://stackoverflow.com/questions/13470499/cmake-add-custom-command-with-dependencies-from-a-different-directory>.

Dženan Zukić, PhD, Senior R&D Engineer, Kitware (Carrboro, N.C.)

On Wed, Aug 9, 2017 at 5:42 PM, Milef, Nicholas Boris <milefn at rpi.edu<mailto:milefn at rpi.edu>> wrote:
Actually, how would I use this command? Would I attach this to the target, or should I run the .exe separately?

I'm kind of confused by the documentation.
________________________________
From: Imstk-developers [imstk-developers-bounces at imstk.org<mailto:imstk-developers-bounces at imstk.org>] on behalf of Milef, Nicholas Boris [milefn at rpi.edu<mailto:milefn at rpi.edu>]
Sent: Wednesday, August 09, 2017 4:17 PM
To: Dzenan Zukic
Cc: imstk-developers at imstk.org<mailto:imstk-developers at imstk.org>
Subject: Re: [Imstk-developers] How to compile shader code in CMake?

Great! Thanks Dzenan!
________________________________
From: Dzenan Zukic [dzenan.zukic at kitware.com<mailto:dzenan.zukic at kitware.com>]
Sent: Wednesday, August 09, 2017 4:13 PM
To: Milef, Nicholas Boris
Cc: imstk-developers at imstk.org<mailto:imstk-developers at imstk.org>
Subject: Re: [Imstk-developers] How to compile shader code in CMake?

You can add custom command:
https://cmake.org/cmake/help/v3.0/command/add_custom_command.html

Dženan Zukić, PhD, Senior R&D Engineer, Kitware (Carrboro, N.C.)

On Wed, Aug 9, 2017 at 4:09 PM, Milef, Nicholas Boris <milefn at rpi.edu<mailto:milefn at rpi.edu>> wrote:
I need to compile the Vulkan shaders (from GLSL to SPIR-V) and I don't really want to add the SPIR-V shaders in the repo because they're binary (although they aren't very large).

>From command prompt, I run this (included with VulkanSDK):
glslangvalidator -V mesh_frag.frag -o mesh_frag.spv

Any ideas on how to do this?

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