protected override void RecognizeUShort(uint singleNodeVertexId, DrawElementsCmd cmd, List <RecognizedPrimitiveInfo> primitiveInfoList)
{
IndexBuffer indexBuffer = cmd.IndexBufferObject;
int length = indexBuffer.Length;
IntPtr pointer = indexBuffer.MapBuffer(MapBufferAccess.ReadOnly);
unsafe
{
var array = (ushort *)pointer.ToPointer();
uint i = 0;
for (i = i + 2; i < length; i++)
{
var value = array[i];
if (value == singleNodeVertexId)
{
var item = new RecognizedPrimitiveInfo(i, array[0], array[i - 1], singleNodeVertexId);
primitiveInfoList.Add(item);
}
}
}
indexBuffer.UnmapBuffer();
}
protected override void RecognizeByte(uint flatColorVertexId, DrawElementsCmd cmd, List <RecognizedPrimitiveInfo> primitiveInfoList)
{
IndexBuffer indexBuffer = cmd.IndexBufferObject;
int length = indexBuffer.Length;
IntPtr pointer = indexBuffer.MapBuffer(MapBufferAccess.ReadOnly);
unsafe
{
var array = (byte *)pointer.ToPointer();
uint i = 0;
for (i = i + 3; i < length; i += 4)
{
var value = array[i];
if (value == flatColorVertexId)
{
var item = new RecognizedPrimitiveInfo(i, array[i - 3], array[i - 2], array[i - 1], flatColorVertexId);
primitiveInfoList.Add(item);
}
}
}
indexBuffer.UnmapBuffer();
}
protected override void RecognizeByte(uint lastVertexId, DrawElementsCmd cmd, List <RecognizedPrimitiveInfo> primitiveInfoList, uint primitiveRestartIndex)
{
IndexBuffer indexBuffer = cmd.IndexBufferObject;
int length = indexBuffer.Length;
IntPtr pointer = indexBuffer.MapBuffer(MapBufferAccess.ReadOnly);
unsafe
{
var array = (byte *)pointer.ToPointer();
long nearestRestartIndex = -1;
uint i = 0;
while (i < length && array[i] == primitiveRestartIndex)
{
nearestRestartIndex = i; i++;
}
for (i = i + 4; i < length; i++)
{
var value = array[i];
if (value == primitiveRestartIndex)
{
nearestRestartIndex = i;
}
else if (
array[i + 1] != primitiveRestartIndex &&
value == lastVertexId &&
array[i - 1] != primitiveRestartIndex &&
array[i - 2] != primitiveRestartIndex &&
array[i - 3] != primitiveRestartIndex &&
array[i - 4] != primitiveRestartIndex &&
(i - 4 - nearestRestartIndex) % 6 == 0)
{
var item = new RecognizedPrimitiveInfo(i, array[i - 4], array[i - 2], lastVertexId);
primitiveInfoList.Add(item);
}
}
}
indexBuffer.UnmapBuffer();
}
private IndexBuffer GetBufferInBytes(int length)
{
IndexBuffer buffer = GLBuffer.Create(IndexBufferElementType.UByte, length, BufferUsage.StaticDraw);
unsafe
{
IntPtr pointer = buffer.MapBuffer(MapBufferAccess.WriteOnly);
var array = (byte *)pointer;
for (int i = 0; i < model.indexes.Length; i++)
{
if (model.indexes[i] == uint.MaxValue)
{
array[i] = byte.MaxValue;
}
else
{
array[i] = (byte)model.indexes[i];
}
}
buffer.UnmapBuffer();
}
return(buffer);
}
/// <summary>
///
/// </summary>
/// <param name="arg"></param>
/// <param name="lastVertexId"></param>
/// <param name="picker"></param>
/// <returns></returns>
internal override uint[] Search(PickingEventArgs arg,
uint lastVertexId, DrawArraysPicker picker)
{
IndexBuffer buffer = GLBuffer.Create(IndexBufferElementType.UInt, 6, BufferUsage.StaticDraw);
unsafe
{
var array = (uint *)buffer.MapBuffer(MapBufferAccess.WriteOnly);
array[0] = 0; array[1] = lastVertexId - 1;
array[2] = lastVertexId - 1; array[3] = lastVertexId - 0;
array[4] = lastVertexId - 0; array[5] = 0;
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 + 1 == lastVertexId)
{
return(new uint[] { 0, lastVertexId - 1, });
}
else if (id == lastVertexId)
{
return(new uint[] { lastVertexId - 1, lastVertexId - 0, });
}
else if (id == 0)
{
return(new uint[] { lastVertexId - 0, 0, });
}
else
{
throw new Exception("This should not happen!");
}
}
protected override void RecognizeUInt(uint lastVertexId, DrawElementsCmd cmd, List <RecognizedPrimitiveInfo> primitiveInfoList)
{
IndexBuffer indexBuffer = cmd.IndexBufferObject;
int length = indexBuffer.Length;
IntPtr pointer = indexBuffer.MapBuffer(MapBufferAccess.ReadOnly);
unsafe
{
var array = (uint *)pointer.ToPointer();
long nearestRestartIndex = -1;
uint i = 0;
for (i = i + 3; i < length; i++)
{
var value = array[i];
if (value == lastVertexId &&
(i - nearestRestartIndex) % 4 == 0)
{
var item = new RecognizedPrimitiveInfo(i, array[i - 3], array[i - 2], array[i - 1], lastVertexId);
primitiveInfoList.Add(item);
}
}
}
indexBuffer.UnmapBuffer();
}
protected override void RecognizeUInt(uint flatColorVertexId, DrawElementsCmd cmd, List <RecognizedPrimitiveInfo> primitiveInfoList, uint primitiveRestartIndex)
{
IndexBuffer indexBuffer = cmd.IndexBufferObject;
int length = indexBuffer.Length;
IntPtr pointer = indexBuffer.MapBuffer(MapBufferAccess.ReadOnly);
unsafe
{
var array = (uint *)pointer.ToPointer();
long nearestRestartIndex = -1;
uint i = 0;
while (i < length && array[i] == primitiveRestartIndex)
{
nearestRestartIndex = i; i++;
}
for (i = i + 3; i < length; i++)
{
var value = array[i];
if (value == primitiveRestartIndex)
{
// try the loop back line.
nearestRestartIndex = i;
}
else if (value == flatColorVertexId &&
array[i - 1] != primitiveRestartIndex &&
array[i - 3] != primitiveRestartIndex &&
array[i - 2] != primitiveRestartIndex
)
{
var item = new RecognizedPrimitiveInfo(i, array[i - 2], array[i - 3], array[i - 1], flatColorVertexId);
primitiveInfoList.Add(item);
}
}
}
indexBuffer.UnmapBuffer();
}