Should material.specular be set to a vector3?

[SwordOfWrynn]

I was using the code from the lighting tutorials while looking at the debug one, and last line (171) of the following code in the Window class for Lighting Ch.4

`// Here we specify to the shaders what textures they should refer to when we want to get the positions.

        _lightingShader.SetInt("material.diffuse", 0);

        _lightingShader.SetInt("material.specular", 1);

        _lightingShader.SetVector3("material.specular", new Vector3(0.5f, 0.5f, 0.5f));`

is causing a GL error
"[DebugSeverityHigh source=DebugSourceApi type=DebugTypeError id=1282] GL_INVALID_OPERATION error generated. Invalid component count."
with debugging enabled

This also exists in all subsequent chapter's windows. I believe that that last line is an error that was left in when Lighting Ch.4 changed material.specular in lighting.frag from a vec3 to a sampler2D.

[NogginBops]

Yeah I'm not sure where that line comes from...
It should be removed as it has no real purpose as the diffuse and specular colors are sourced from the sampler2ds.
Seems like I have already fixed this issue in my refactoring of the tutorial here: #89
So just removing those lines should fix your error.

[NogginBops]

Pushed 7b876bd that removes these erroneous calls.