Debug Reveals Missing .glsl files in Opengl

[PaulCMurdoch]

Description of bug / unexpected behavior

When you run debug on any opengl program it shows that .glsl files the code tries to access does not exist. For instance in #2155. vert.glsl, geom.glsl, and frag.glsl are said not to exist.The code trying to access these files is at: https://github.com/ManimCommunity/manim/blob/main/manim/renderer/shader_wrapper.py.

Expected behavior

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System specifications

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• OS (with version, e.g Windows 10 v2004 or macOS 10.15 (Catalina)):
• RAM:
• Python version (python/py/python3 --version):
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Additional comments

[k4pran]

It seems to be related to OpenGLCamera as it has no shader folder set, I might be wrong but from my understanding the camera shouldn't actually be rendered like other objects, we just get the view matrix from it right? If that is the case I assume we need an exception for the camera to not try and load any shaders for it.

This debug issue will also happen for cases like the below:

class SurfaceTest(Scene):
    def construct(self):
        s = OpenGLSurface()
        self.add(s)
        self.interactive_embed()

Reason is that it uses a shader folder that doesn't have a geometry shader, as geo shaders are not always needed maybe we shouldn't log if they are missing?