private void BuildScreenQuadGeometryBuffers()
{
var quad = GeometryGenerator.CreateFullScreenQuad();
var verts = quad.Vertices.Select(v => new Basic32(v.Position, v.Normal, v.TexC)).ToList();
var vbd = new BufferDescription(Basic32.Stride * verts.Count, ResourceUsage.Immutable, BindFlags.VertexBuffer, CpuAccessFlags.None, ResourceOptionFlags.None, 0);
_screenQuadVB = new Buffer(Device, new DataStream(verts.ToArray(), false, false), vbd);
var ibd = new BufferDescription(sizeof(int) * quad.Indices.Count, ResourceUsage.Immutable, BindFlags.IndexBuffer, CpuAccessFlags.None, ResourceOptionFlags.None, 0);
_screenQuadIB = new Buffer(Device, new DataStream(quad.Indices.ToArray(), false, false), ibd);
}