vertex_array_object.rs VertexAttribPointer stride being set incorrectly

[rnd-ash]

So in my project, I have a mesh file that has the data already ready to be sent to the GPU. I create bindings dynamically, and call VertexBuffer::new_raw. Then, when VertexAttribPointer in vertex_array_object.rs is called, the stride parameter is incorrect.

Example:

Vertex attributes (Generated)

 [("position", 0, 0, F16F16F16, false), ("texturelocation", 6, 1, F16F16, false)]

So here we see the vertex consists of 3x F16 for position, and 2x F16 for texture location. This means that each vertex is 5x2 bytes long (10 bytes).

So I call VertexBuffer::new_raw like so:

VertexBuffer::new_raw(
                display,
                vertex_buffer.as_slice(),
                Cow::Owned(bindings),
                10,
            )

Note that vertex_buffer is simply a array of u8 bytes from the file being read into the GPU directly.

but then, when rendering, the vertex size is ignored and set to 1 instead!

Call (vertex_array_object.rs)

ctxt.gl.VertexAttribPointer(1, 2, 5131, 1, 6,)

Note how the 4th parameter here is 1 in the call withint glium? This should be 10 as it is what I set in my vertex stride size.

[rnd-ash]

I had a further look at the source to VertexBuffer

    #[inline]
    pub unsafe fn new_raw<F: ?Sized>(facade: &F, data: &[T],
                             bindings: VertexFormat, elements_size: usize)
                             -> Result<VertexBuffer<T>, CreationError>
                             where F: Facade
    {
        // FIXME: check that the format is supported

        Ok(VertexBuffer {
            buffer: Buffer::new(facade, data, BufferType::ArrayBuffer,
                                         BufferMode::Default)?,
            bindings,
        })
    }

It appears the elements_size param is actually ignored

[est31]

That's interesting, it seems that BufferAny has a parameter to allow you setting a custom elements_size.