internal override uint[] Search(RenderEventArgs arg,
int x, int y,
uint lastVertexId, ZeroIndexRenderer modernRenderer)
{
OneIndexBuffer buffer = Buffer.Create(IndexBufferElementType.UInt, 6, DrawMode.Lines, BufferUsage.StaticDraw);
unsafe
{
var array = (uint*)buffer.MapBuffer(MapBufferAccess.WriteOnly);
array[0] = lastVertexId - 2; array[1] = lastVertexId - 0;
array[2] = lastVertexId - 4; array[3] = lastVertexId - 2;
array[4] = lastVertexId - 0; array[5] = lastVertexId - 4;
buffer.UnmapBuffer();
}
modernRenderer.Render4InnerPicking(arg, buffer);
uint id = ColorCodedPicking.ReadStageVertexId(x, y);
buffer.Dispose();
if (id + 4 == lastVertexId)
{ return new uint[] { id + 4, id, }; }
else
{ return new uint[] { id - 2, id, }; }
}