LearnOpenGL | Practise for OpenGL following http : //learnopengl.com/ | Computer Vision library

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.

I have been trying to create an OpenGL window making use of GLAD and GLFW, following the instructions found at learnopengl.com and glfw.org. At first glance according to the documentation, this is enough to get a window working:

I'm trying to use a compute shader to do three-dimensional physical simulations but having trouble storing anything into my 3D texture. My shaders compile successfully but when reading back any value from the 3D texture I get a zero vector. I haven't used compute shaders before either so I'm not sure if I'm even distributing the work load properly in order to achieve what I want.

I've isolated the problem in a small example here. Basically the compute.glsl shader has a uniform image3D and uses imageStore to write a vec4(1,1,0,1) into gl_WorkGroupID. In C++ I create a 100x100x100 3D texture and bind it to the shader's uniform, then I call glDispatchCompute(100,100,100) - to my knowledge, this will create 1,000,000 jobs/shader invocations, one for each coordinate in the texture. In my view.glsl fragment shader I read the value of a random coordinate (in this case (3,5,7)) and output that. I use this shade a cube object.

Everything I've tried results in a black cube being output:

Here's my code (I've been following along with learnopengl.com so it's mostly the same boiler plate stuff except I extended the shader class to handle compute shaders):

I wanna draw an opengl window in center of the screen，however I searched everywhere but didn't find any answer to it. Below is a common snippet code of creating a window But it always show up in most left-top position.How can I control it.

I don't have very much experience with OpenGL, GLFW, or GLEW so my troubleshooting ability with these libraries is slim to none. I have managed to render a triangle ([-1, -1, 0], [1, -1, 0], [0, 1, 0]) but when using the vertex attribute coordinates for a cube, along with color attributes it seems to not render. There could be a lot wrong with my code, the shaders, and my matrix operations. I wish I had a clearer understanding of what I'm doing so I could give a more descriptive account of my error. Currently the above code only renders the window. I followed https://learnopengl.com/ initially and got the first tutorials working, the following code is my "testing" file where I've attempted to reimplement some of the elements myself. There are lots of copy pasted portions that may be shared with that tutorial if it helps at all.

Any insight or suggestions would be appreciated very much.

Main Source

I'm trying to build a voxel engine, and to do this I have to create hundreds of thousands of voxels, and I was hoping I could use instanced rendering. However, the drawing is very unexpected. I'm primarily following the LearnOpenGL guide.

When rendering each voxel individually, the program works fine:

However, when using instanced rendering...

Another angle...

I'm trying to render the voxels in a big chunk, so this is what my code looks like:

voxel.hpp

I am using Visual Studio Community and I am trying to create OpenGL application. I am using GLFW to open a window like this:

I am learning OpenGL from http://learnopengl.com and I have a problem with transformation based on this chapter Coordinate Systems... I want to render something like this Movie but I have something like this Movie2 in 5 seconds its back on the screen. Sorry for many links but I think it's easier to show this by video. It's my render loop:

I am attempting to address the age old issue of model vs world space coordinates when adding light to a scene with transformed models.

I have a house model with two instances. a skull, a single point light in my scene as well as some terrain and a skybox. I noticed that when applying some rotations to my models, the illumination provided by the point light was rotating with it. After some reading it became obvious that I am doing all of my computations in my shaders in model space but my light position/directions are in world space.

So, I realized I needed to uniform my space for my calculations and I think it makes sense to keep the shaders in model space and convert the light components from world to model.

When I don't do the transformation it looks almost right (though not perfect which I'm betting is b/c of the different spaces). I render a small lightbulb model at the location of the light and the tops of the houses and the terrain all illuminate as I expect relatively well.

When I do the conversion of the light position back to model space I'm expecting the light to still be illuminating from the lightbulb model. However it gets wonky.

I have no rotations on the models but some minor translations so I'm confused as to why it seems like the light source gets rotated 90 degrees around the x axis...