Why Does My Go OpenGL Triangle Remain Invisible?

OpenGL Vertex Buffer Fails to Display Triangle in Go

In an attempt to replicate a tutorial on creating a simple triangle using OpenGL in Go, an individual encountered difficulties in getting the vertex buffer to display the shape. While the window opened and the background turned blue, the triangle remained invisible.

The code snippet provided involves creating a vertex buffer and then drawing the triangle using glDrawArrays. However, in the c-version of the code which works, the AttribPointer function takes a parameter (void*)0 to specify the array buffer offset, while in the Go-version, the provided offset argument crash the application, and nil doesn't seem to work either.

The updated solution involved using the work branch of banthar bindings and altering the calls to AttribPointer and BufferData as follows:

<code class="go">vertexAttrib.AttribPointer(
    3,     // size
    gl.FLOAT, //type
    false, // normalized?
    0,     // stride
    nil) // array buffer offset

data := []float32{0, 1, 0, -1, -1, 0, 1, -1, 0}
[...]
gl.BufferData(gl.ARRAY_BUFFER, len(data)*4, data, gl.STATIC_DRAW)</code>

By passing the size in bytes to BufferData and setting the array buffer offset to nil in AttribPointer, the problem was resolved, and the triangle was successfully displayed.

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