glut | Used with the opengl gem

I am having troubles using OpenGL functions in my render loop.
Here is my code :

I am trying to draw this free airwing model from Starfox 64 in OpenGL. I converted the .fbx file to .obj in Blender and am using tinyobjloader to load it (all requirements for my university subject).

I pretty much slapped the example code (with the modern API) into my program, replaced the file name, and grabbed the attrib.vertices and attrib.normals vectors to draw the airwing.

I can view the vertices with GL_POINTS:

I want to draw points with openGL, I have a 32x32 screen size and I want to fill it with the color red, however I don't understand how the parameters of glVertex2f(-1, 0.5) are working

My first instinct was to do something like this:

I tried to use the following code Bresenham line drawing but by OpenGL GLUT project. I have successfully run the code but no outcome result. I'm trying to draw to points between the two points p1(5,8) and P2(9,11). But seems have a problem with my for loop.

Hello I am trying to orbit the earth around the sun in an orbit path.What I have done so far draw two cirlces one the sun and the earth.The earth is on the ellipse.Tried to use glutTimerFunc() to create an animation but no result, here is the code.How is it possible to make earth orbit around the sun in an ellipse path.

I am writing a program with OpenGL/GLUT using the fixed function pipeline (I know, I know, it's university). I've written the Quaternion class from scratch with help of other implementations and the internet and it essentially works fine, but it's rotating along every axis in the opposite direction to what I thought it would.

I thought about posting this on the Math stack exchange, but given it's OpenGL/GLUT I thought it would be better understood here.

The axis below are: green -> Y, red -> X, blue -> Z. The darker sides are the positive directions. I've rotated it a little to show the positive Z axis. The axes are the world coordinate axes.

I have defined pressing "a" as a positive rotation in Y. The right hand rule states that this is a counterclockwise rotation in the Y axis. The image shows the rotation of the cube after pressing "a". As you can see, it has rotated clockwise. This occurs for every axis.

My Quaternion class:

So, I'm trying to do a very basic program in OpenGL. Everything went fine, had issues with texturing but now it's all solved.

But now, I have a little issue. The texture shows, but it isn't "centered". I tried changing the vertex positions, but nope, it doesn't work.

Here's an image showing what's happening:

Here's some code that might help:

My includes:

Hello I am trying to implement the share of facebook in my javascript code, however I get this error, I tried several solutions suggested but none was successful in its my implementation.

Could someone help me correct this error?

Thanks in advance. Any help is welcome.

Full code: https://pastebin.com/kSgFDf0L

Error on console.

I am attempting to make a 3D rotating torus with lighting. The rotating torus works fine. The lighting is the problem; if I leave GL_SPECULAR to its default, the light works fine. When I try to set it to a RGBA float quadruplet (what it is supposed to be) it says it is the incorrect format. I tried to print the actual default value of GL_SPECULAR using print(str(int(GL_SPECULAR))) it returns the float 4611.0, and I can not find any information on this type of color format. Here is my code: