[ShaderGraph] [2022.1] [Ruby] Bool <-> Vector casts

[cdxntchou]

Purpose of this PR

Fix for https://fogbugz.unity3d.com/f/cases/1359160/

Add bool <-> vector casts:

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Testing status

Describe what manual/automated tests were performed for this PR

• Tested that casting bool to a dynamic vector node results in the same vector size as casting a float.
• Bool cast by itself to a dynamic vector node results in a 1-element vector (float).
• double checked conversion code in HLSL is correct

Added automated tests:

• Dynamic slot tests -- allow bool to be connected to dynamic vector slot in all combinations
• Fixed slot tests -- allow bool to be connected to static vector slot in all combinations
• Node Tests -- check that conversion from bool --> any vector type produces the correct value

PR ShaderGraph: 🟢
https://yamato.cds.internal.unity3d.com/jobs/902-Graphics/tree/sg%252Fbool-cast/.yamato%252Fall-shadergraph.yml%2523PR_ShaderGraph_trunk/9198270/job/pipeline

master: c722c5d
https://yamato.cds.internal.unity3d.com/jobs/902-Graphics/tree/master/.yamato%252Fall-
shadergraph.yml%2523PR_ShaderGraph_trunk/9173313/job/pipeline

PR HDRP: 🟡 -- failures match master behavior
https://yamato.cds.internal.unity3d.com/jobs/902-Graphics/tree/sg%252Fbool-cast/.yamato%252Fall-hdrp.yml%2523PR_HDRP_trunk/9221605/job/pipeline

master: c722c5d
https://yamato.cds.internal.unity3d.com/jobs/902-Graphics/tree/master/.yamato%252Fall-hdrp.yml%2523PR_HDRP_trunk/9193640/job/pipeline

failures:
HDRP on OSX_Metal_playmode_mono_Linear on version trunk -- non-test failure on both 🟡
HDRP on Linux_Vulkan_playmode_mono_Linear on version trunk -- non-test-failure on both 🟡
https://yamato.cds.internal.unity3d.com/jobs/902-Graphics/tree/master/.yamato%252Fhdrp-linux-vulkan.yml%2523HDRP_Linux_Vulkan_playmode_mono_Linear_trunk/9224677/job
HDRP on Win_DX11_playmode_XR_mono_Linear on version trunk -- green on rerun 🟢

PR URP: 🟡 -- failures match master behavior
https://yamato.cds.internal.unity3d.com/jobs/902-Graphics/tree/sg%252Fbool-cast/.yamato%252Fall-urp.yml%2523PR_URP_trunk/9198473/job/pipeline

master: c722c5d

failures:
URP_Terrain on Android_Vulkan_Standalone_il2cpp_Linear on version trunk -- non-test failure on both 🟡
URP_Foundation on OSX_Metal_playmode_mono_Linear on version trunk -- non-test failure on both after master rerun 🟡
https://yamato.cds.internal.unity3d.com/jobs/902-Graphics/tree/master/.yamato%252Furp_foundation-osx-metal.yml%2523URP_Foundation_OSX_Metal_playmode_mono_Linear_trunk/9227199/job

URP_Foundation on Android_OpenGLES3_Standalone_il2cpp_Linear on version trunk -- green on rerun 🟢
URP_PostPro on OSX_Metal_playmode_mono_Linear on version trunk -- non-test failure on both after master rerun 🟡
https://yamato.cds.internal.unity3d.com/jobs/902-Graphics/tree/master/.yamato%252Furp_postpro-osx-metal.yml%2523URP_PostPro_OSX_Metal_playmode_mono_Linear_trunk/9226818/job

Universal_Stereo on Win__Standalone_mono_Linear on version trunk -- same 1 test failed on both 🟡
ShaderGraph on OSX_Metal_playmode_mono_Linear on version trunk -- non-test failure on both after master rerun 🟡
https://yamato.cds.internal.unity3d.com/jobs/902-Graphics/tree/master/.yamato%252Fshadergraph-osx-metal.yml%2523ShaderGraph_OSX_Metal_playmode_mono_Linear_trunk/9226817/job

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Comments to reviewers

Notes for the reviewers you have assigned.

[github-actions]

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[bencloward]

I went over this with Alex and we both love it! Thanks a lot for figuring out how to do this.

[cdxntchou]

I went over this with Alex and we both love it! Thanks a lot for figuring out how to do this.

👍

[joshua-davis]

Does this mean that vector -> bool casts only take the x component? Should that be the behavior or should it be using either any/all?

[cdxntchou]

Probably taking the first one has the least chance of unintentional behavior...

[joshua-davis]

This isn't clear to me as you remove Boolean from the list but you handle the case of boolean here. Can this actually happen and if so why?

[cdxntchou]

Yeah the inner case here can be removed, as the outer case handles it. Didn't have the outer check originally, but it's needed to make bool act like Vector1 in terms of allowing upcasts.

[jessebarker]

LGTM

[joshua-davis]

Looks good and the questions I had were answered.