shaders | Slideshow for a shader talk at Dev Workshop Conf | Learning library

I'm learning WebGl and trying to convert a web mining script to do elliptical curve addition. I started by replacing the working GL code with the code from vanitygen-plus, even though it does more than I need/want. I also began replacing the variables passed to the expected ones and removed a bunch of unneeded JavaScript. I now get the error "glminer.js:54 WebGL: INVALID_OPERATION: useProgram: program not valid" currently testing in chrome 91 on windows 10. unfortunately this doesn't help me much as it doesn't tell me what is invalid.

I've been working on a project, but I got a weird error. I can't pass 2 Shader instances to a variadic constructor, even though it says it supports 2 Shader parameters.

Exact error message: E0289 no instance of constructor "Program::Program" matches the argument list argument types are: (Shader, Shader)

Here is code:

I'm trying to pass the color of my triangle through my main function, but when I try to do it my triangle only gets white like it has no fragment shader

Vertex Shader:

Why/how do I bind vertex attributes to a shader? - examples do but never explain.

If I allow a vertex attribute in GLSL location = 0, does that still have to be allowed in code?

How to properly set Q-vertex array buffers/objects?

Where does this* weird artifact even come from?

*The blue square is a label used to display QPixmap images. The green one is the 1 GLWidget that inherits from QOpenGLWidget. As you can see, it creates a weird square on the top-left aswell.

The Green window is supposed to display a red triangle on the lower right corner.

The relevant code might only be the last section, GLWidget.h.

Also paintGL() only runs just a few times for some reason. code:

.pro:

In the fragment shader the alpha of gl_Fragcolor is null : gl_FragColor = vec4(0.88,0.33,0.55,0.0);

When you look the color of the point (size 24) , the color is the background-color of the canvas.

Where is the clearColor ? ( gl.clearColor(0.12, 0.34, 0.56, 1.0);)

I'm new at OpenGL and GLSL. I'm trying to write a first program with using those libraries in Qt Creator that would draw in the QOpenGLWindow window an ordinary rectangle. The compilation was implemented successfully, however the program crashes immediately on trying to run this with the following error output:

My code does not display a red triangle, instead there is a black screen. I was following the OpenGL tutorial by The Cherno. This happened at end of the 7th episode. I am using Visual Studio 2019 with Visual C++ on Windows 10 Home. My Graphics Card is a NVidia 820m.Link for tutorial I was following.

I am following an OpenGL tutorial from https://learnopengl.com/ (specifically https://learnopengl.com/Advanced-OpenGL/Depth-testing) and I have many errors to do with stbi. Error Log image here (Below I have also attached the complete Output tab). I have added the "#define STB_IMAGE_IMPLEMENTATION" at the top of the main.cpp file (and not in a header). If I don't use any stb_image functionalities, the project compiles and runs. I have had projects where stb_image worked fine, but all those projects that worked were x86 (or 32-bit). It seems that I can not get stb_image with x64 (or 64-bit). I know that x64 itself works since other projects without stb_image that were x64 have compiled. I have also looked back to where I downloaded the header file for stb_image and there was no option for x64 vs x86 as there was only one universal option. Here is an image of how the files are organized: File hierarchy. I will also include my main.cpp file but if you want to see a specific file let me know. I am very new to c++ since I come from java and python so any help is appreciated.

I just started learning OpenGL by following https://learnopengl.com/Getting-started/Hello-Triangle, following the tutorial I wrote the code as per my understanding which compiles and does give me an output but instead of an orangish triangle it shows a white one. If I replace the shaderProgram() with the code from https://learnopengl.com/code_viewer_gh.php?code=src/1.getting_started/2.1.hello_triangle/hello_triangle.cpp it works (shows the orange triangle), so I think I narrowed the problem to shader program compilation, I just couldn't find what's wrong with it, following is my code.