protected override VertexBufferPtr Upload2GPU()
{
ZeroIndexBufferPtr bufferPtr = new ZeroIndexBufferPtr(
this.Mode, this.FirstVertex, this.VertexCount);
return(bufferPtr);
}
internal override uint[] Search(RenderEventArgs arg,
int x, int y,
uint lastVertexId, ZeroIndexRenderer modernRenderer)
{
ZeroIndexBufferPtr zeroIndexBufferPtr = modernRenderer.IndexBufferPtr;
ZeroIndexBufferPtr indexBufferPtr = null;
// when the temp index buffer could be long, it's no longer needed.
// what a great OpenGL API design!
using (var buffer = new ZeroIndexBuffer(DrawMode.LineLoop,
zeroIndexBufferPtr.FirstVertex, zeroIndexBufferPtr.VertexCount))
{
indexBufferPtr = buffer.GetBufferPtr() as ZeroIndexBufferPtr;
}
modernRenderer.Render4InnerPicking(arg, indexBufferPtr);
uint id = ColorCodedPicking.ReadPixel(x, y, arg.CanvasRect.Height);
indexBufferPtr.Dispose();
if (id == zeroIndexBufferPtr.FirstVertex)
{
return(new uint[] { (uint)(zeroIndexBufferPtr.FirstVertex + zeroIndexBufferPtr.VertexCount - 1), id, });
}
else
{
return(new uint[] { id - 1, id, });
}
}
internal override uint Search(RenderEventArgs arg,
int x, int y,
uint lastVertexId, ZeroIndexRenderer modernRenderer)
{
ZeroIndexBufferPtr zeroIndexBufferPtr = modernRenderer.IndexBufferPtr;
ZeroIndexBufferPtr indexBufferPtr = null;
// when the temp index buffer could be long, it's no longer needed.
// what a great OpenGL API design!
using (var buffer = new ZeroIndexBuffer(DrawMode.Points,
zeroIndexBufferPtr.FirstVertex, zeroIndexBufferPtr.VertexCount))
{
indexBufferPtr = buffer.GetBufferPtr() as ZeroIndexBufferPtr;
}
modernRenderer.Render4InnerPicking(arg, indexBufferPtr);
uint id = ColorCodedPicking.ReadPixel(x, y, arg.CanvasRect.Height);
indexBufferPtr.Dispose();
if (zeroIndexBufferPtr.FirstVertex <= id &&
id < zeroIndexBufferPtr.FirstVertex + zeroIndexBufferPtr.VertexCount)
{
return(id);
}
else
{
throw new Exception("This should not happen!");
}
}
/// <summary>
///
/// </summary>
/// <returns></returns>
public IndexBufferPtr GetIndex()
{
if (indexBufferPtr == null)
{
using (var buffer = new ZeroIndexBuffer(
DrawMode.Quads, 0, maxCharCount * 4))
{
indexBufferPtr = buffer.GetBufferPtr() as ZeroIndexBufferPtr;
}
}
return(indexBufferPtr);
}
public ZeroIndexBufferPtrController(ZeroIndexBufferPtr indexBufferPtr)
{
this.indexBufferPtr = indexBufferPtr;
}
