GL_SELECT mode in VBOs

Apprentice

Posts: 13
Joined: 2007.10

Post: #1

Feb 28, 2008 — 10:38 AM

Hi experts,

This is an old issue and I saw a couple thread regarding this posted a couple years ago, but I couldn't find the solution. Does anyone know this? Thanks a lot in advance. I have tried something like this:

Code:

Mesh::Render(GLenum mode)

{

    if (mode == GL_RENDER && !m_VBOLoaded)

    {

        BuildVBOs();

        m_VBOLoaded = true;

    }

    if (mode == GL_SELECT)

    {

        clearVBOS();

        m_VBOLoaded = false;

    }

    renderMesh(); -->this is also a Mesh function and calls gldrawElements to render a mesh;

}

I did in this way, since Picking is so slow with VBOs. I tried to remove VBOs and use normal vetex array to render in picking mode. Is this supposed to work? I have been trying this and it looks like it works if I only load one or two meshes and it crashs if I load a lot meshes. not sure it's my code problem or it's just the wrong idea. Thanks,
Ching

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