Armory: Bump node does not compile

[knowledgenude]

I don't know if this is already supported but is returning errors:

build_untitled/compiled/Shaders/Material_001_mesh.frag.glsl:7: 'n' : undeclared identifier 
build_untitled/compiled/Shaders/Material_001_mesh.frag.glsl:7: '=' :  cannot convert from ' temp float' to ' temp 3-component vector of float'
build_untitled/compiled/Shaders/Material_001_mesh.frag.glsl:7: '' : compilation terminated 

SPIR-V is not generated for failed compile or link

Compiling shader 1 of 19 (Material_001_mesh.frag.glsl) failed:
Shader compiler error.
(node:7132) UnhandledPromiseRejectionWarning: Unhandled promise rejection (rejection id: 2): Shader compiler error.
(node:7132) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

[MoritzBrueckner]

Hi, the bump node is already supported, this problem occurs because of some wrong shader generation. Can you share an example file or a few steps to reproduce?

[knowledgenude]

@MoritzBrueckner Hm, maybe i am using it in the wrong way... the nodes sockets are not of the same color, but in eevee it works as expected.

Example: bump.zip

Setup:

[MoritzBrueckner]

There are actually multiple issues here:

• The musgrave texture node was "returning" a color even if it no longer has a color output (not sure if it existed before). PR that fixes this: https://github.com/armory3d/armory/pull/1993

• The bump mapping node tries to access normals that aren't written in the shader yet. This only occurs when the Armory Project > Export Tangents setting is active, but if it's not there is another error also happening in the normal map parsing ('vVec' : undeclared identifier).

  It seems that there are many open problems with normal maps (also see https://github.com/armory3d/armory/issues/1968), the normal map parsing urgently needs an update. When I try to make bump mapping work with tangents I just get a black mesh, so I still have to figure out what I'm doing wrong.

Thanks for the report as always!