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I have taken code for two projects. One being the code for creating a cube and another is the code for creating a pyramid. I am now trying to render both of the objects in OpenGL which I have done the problem is the objects are attached to one another. I have added some code heading towards rendering them separately, however I am now stuck where my cube is only showing 3 of the triangles used to create it and the whole pyramid shows. Yet the objects are still attached to one another. Any help or guidance?

I have the following vertex and fragment shaders:

I'm trying to render multiple objects, but only the first object specified is rendering. I have a series of vertices arrays with their corresponding indices in a separate array. According to everything I've read, I simply allot 2 VBOs per object I'm drawing -- one VBO for vertices, one for indices. I generate the buffers and bind them to their respective VAO. When rendering, I then need to have individual draw calls for each object.

This is my code for declaring the needed VAOs and VBOs:

To be clear, I've extensively tested this code and found the issue is somewhere with the code written prior to the WGL code. It's precisely in the WIN32 code. Now I think it could partially be caused by calling gluOrth2D but even then, that shouldn't be the primary cause as far I as I understand. I may figure this out myself just by messing with stuff but considering this issue (that occured in a much larger project) has taken up a lot of my time I thought it was worth posting this encase anyone else runs into the same problem. I'm hoping for an explanation as well as fix/correction.

I'm having a problem while converting OpenGL video plugin to support GLES 3.0 So far everything went well, except glTexSubImage2D the original code uses GL_UNSIGNED_SHORT_1_5_5_5_REV as pixels type which is not supported in GLES 3.0

the type that worked is GL_UNSIGNED_SHORT_5_5_5_1 but colors and pixels are broken,

so I thought converting the pixels buffer would be fine..

but due to my limited understanding in GL and C++ I didn't succeed to do that.

Pixels process:

• the pixels will be converted internally to 16 bit ABGR as in the Shader comments:

I have an OpenGL project where I wanted to wrap all the objects in classes. I started with the VBO. Before wrapping, the code looked something like this:

I'm currently working with OpenGL in C++, and I'm trying to debug by identifying what the currently bound vertex buffer and index buffer are. I have three functions.

In my OpenGL ES 3.0 program I need to have two separate Uniform Buffer Objects (UBOs). With just one UBO, things work as expected. The code for that case looks as follows:

GLSL vertex shader:

I have read and pieced multiple projects together in order to create an x11 window with open gl working, with the preinstalled GL/gl.h and GL/glx.h. The problem I get is that the triangles I want to draw to the screen does not show. What I think is that I have not setup any projecting parameters etc, or that the triangles doesn't get drawn to the space I want to draw to.

I do get a window and I am able to setup xevents that triggers after I have subscribed with eventmasks. Pressing 'esc' key will trigger an event which will in the end call Shutdown() and break the loop, free up x11 and gl stuff, and lastly exit the program. So the only thing that doesn't work is the drawing to screen stuff which basically is the main point of my program.

How can I resolve this?

main.cpp: