/// <summary>
/// Sets up a new vertex array object if needing to be updated.
/// </summary>
private void UpdateArray()
{
if (m_dirty && m_program != null && m_vertexBuffer != null)
{
// destroy the old vertex array
if (m_vertexArrayGenerated)
{
GL.DeleteVertexArray(this);
m_vertexArrayGenerated = false;
}
// create a new vertex array
m_handle = GL.GenVertexArray();
m_vertexArrayGenerated = true;
// bind the new array
GL.BindVertexArray(this);
// set the source vertex and index buffers
m_vertexBuffer.Bind();
if (m_indexBuffer != null)
{
m_indexBuffer.Bind();
}
// set the vertex attributes
m_program.SetVertexAttributes(m_vertexBuffer.VertexAttributes);
// unbind all the buffers
GL.BindVertexArray(0);
m_vertexBuffer.Unbind();
if (m_indexBuffer != null)
{
m_indexBuffer.Unbind();
}
m_dirty = false;
}
}
