/// <summary>
///
/// </summary>
/// <param name="arg"></param>
/// <param name="flatColorVertexId"></param>
/// <param name="picker"></param>
/// <returns></returns>
internal override uint[] Search(PickingEventArgs arg,
uint flatColorVertexId, DrawArraysPicker picker)
{
IndexBuffer buffer = GLBuffer.Create(IndexBufferElementType.UInt, 6, BufferUsage.StaticDraw);
unsafe
{
var array = (uint *)buffer.MapBuffer(MapBufferAccess.WriteOnly);
array[0] = flatColorVertexId - 2; array[1] = flatColorVertexId - 0;
array[2] = flatColorVertexId - 4; array[3] = flatColorVertexId - 2;
array[4] = flatColorVertexId - 0; array[5] = flatColorVertexId - 4;
buffer.UnmapBuffer();
}
var cmd = new DrawElementsCmd(buffer, DrawMode.Lines);
picker.Node.Render4InnerPicking(arg, IndexAccessMode.ByFrame, cmd);
uint id = ColorCodedPicking.ReadStageVertexId(arg.X, arg.Y);
buffer.Dispose();
if (id + 4 == flatColorVertexId)
{
return(new uint[] { id + 4, id, });
}
else
{
return(new uint[] { id - 2, id, });
}
}
public IEnumerable <IDrawCommand> GetDrawCommand()
{
if (this.drawCmds == null)
{
SingleCubeIndex[] indexes = GetIndexes(lengthX, lengthY, lengthZ, this.blockSize);
IndexBuffer[] buffers = indexes.GenIndexBuffers(IndexBufferElementType.UInt, BufferUsage.StaticDraw, this.blockSize);
var cmds = new IDrawCommand[buffers.Length];
for (int i = 0; i < buffers.Length; i++)
{
cmds[i] = new DrawElementsCmd(buffers[i], DrawMode.QuadStrip, uint.MaxValue);
}
this.drawCmds = cmds;
}
foreach (var item in this.drawCmds)
{
yield return(item);
}
}
