There you go

Lovely

I was toying with the though of creating an open opengl room while we're at it^^

I haven't really been doing anything more than running examples since the fixed pipeline days

What do you want to know?

I honestly wasn't thinking anyone would react that quickly. I'm currently in the process of trying to draw a simple triangle, but I fail phenomenally

So right now I'm restructuring what I wrote to find the issue^^

Ok, so first of all

What technology are you using?

VBOs or VAOs?

both?

creating a VAO with glgenvertexarrays

binding it

So you use the VAOs to store the VBOS

ah wait

creating a VBO with glgenbuffers

binding it

filling it with vertices from an array of floats

creating the vao with glgenvertexarrays

binding it

then doing glvertexattribpointer while the vao is bound

unbinding the vao

thats the setup

in my draw loop i clear the color and depth buffers

then bind my vao

Just posting the code is enough

gldrawarrays

oh that will look fun

do you do java?^^

Yeah

That's my primary language for OpenGL

lovely

    int vbo;
    int vao;

    @Override
    public void init(GL gl) {
        //1. create VBO with vertice data
        vbo = gl.glGenBuffers(); //allocate buffer on gpu
        gl.glBindBuffer(GL.GL_ARRAY_BUFFER, vbo); //bind buffer to gl operation
        float[] triangleVertices = {-0.8f, -0.8f, 0.0f,
                                    0.8f, -0.8f, 0.0f,
                                    0.0f,  0.8f, 0.0f};
        gl.glBufferData(GL.GL_ARRAY_BUFFER, triangleVertices, GL.GL_STATIC_DRAW);

Do you use shaders?

not at this point

I'm basically only trying to get a white triangle drawn as described here:

opengl-tutorial.org/beginners-tutorials/…

upper half is without shaders as far as i understood it

What OS do you have? Mac?

That can affect it

win

Ok, then no problem there

BTW, the first value you pass to the glVertexAttribPointer is actually the vertex attribute you put the VBO in

Using GLFW to create window and context. the GL interface i use is synthesized from lwjgl's generated GL## classes and passed through from my backend

hmm that might help

It's currently ok

I was just in the process of rewriting yeah. I'll give it a spin then

Basically, a VAO has 16 slots, these are the vertex attributes

Put a piece of error checking in the game loop

good call

got a snippet?

int error = GL.glGetError();
while (error != GL.GL_NO_ERROR)
    System.out.println(error);
    error = GL.glGetError();

thanks

It prints out a number, around 65000 (I think) if it's a buffer error

great i'll give it a spin

it's throwing a beautiful access violation, so I've messed up something in my reafctoring

messed up something in my window creation... I'll eventually be back

do you know by chance: is there any drawback in calling GL.createCapabilities() every frame?

I think it has a return in it, if the current capability is the one belonging to the window

So maybe nanoseconds

yeah i just realised it's probably rather makeContextCurrent from glfw that I need

I refactored my view interface to allow setting it up and tearing it down when it is assigned/unassigned to/from a window. so now I have the issue that I need to pass the context back and forth - took me way too long to find that issue^^