protected override void RecognizeUShort(uint lastVertexId, IntPtr pointer, DrawElementsCmd cmd, List <RecognizedPrimitiveInfo> primitiveInfoList, uint primitiveRestartIndex)
{
int length = cmd.IndexBufferObject.Length;
unsafe
{
var array = (ushort *)pointer.ToPointer();
long nearestRestartIndex = -1;
uint i = 0;
while (i < length && array[i] == primitiveRestartIndex)
{
nearestRestartIndex = i; i++;
}
for (i = i + 1; i < length; i++)
{
var value = array[i];
if (value == primitiveRestartIndex)
{
// try the loop back line.
nearestRestartIndex = i;
}
else if (value == lastVertexId &&
array[i - 1] != primitiveRestartIndex)
{
var item = new RecognizedPrimitiveInfo(i, array[i - 1], lastVertexId);
primitiveInfoList.Add(item);
}
}
}
}
/// <summary>
///
/// </summary>
/// <param name="arg"></param>
/// <param name="singleNodeVertexId"></param>
/// <param name="stageVertexId"></param>
/// <param name="picker"></param>
/// <returns></returns>
internal override uint Search(PickingEventArgs arg,
uint singleNodeVertexId, uint stageVertexId, DrawArraysPicker picker)
{
var array = new uint[]
{
singleNodeVertexId - 0,
singleNodeVertexId - 2,
singleNodeVertexId - 4
};
IndexBuffer buffer = array.GenIndexBuffer(BufferUsage.StaticDraw);
var cmd = new DrawElementsCmd(buffer, DrawMode.Points);
picker.Node.Render4InnerPicking(arg, cmd);
uint id = ColorCodedPicking.ReadStageVertexId(arg.X, arg.Y);
buffer.Dispose();
if (stageVertexId - 0 == id || stageVertexId - 2 == id || stageVertexId - 4 == id)
{
return(id);
}
else
{
throw new Exception("This should not happen!");
}
}
/// <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, 4, BufferUsage.StaticDraw);
unsafe
{
var array = (uint *)buffer.MapBuffer(MapBufferAccess.WriteOnly);
array[0] = lastVertexId - 0;
array[1] = lastVertexId - 1;
array[2] = lastVertexId - 2;
array[3] = lastVertexId - 3;
buffer.UnmapBuffer();
}
var cmd = new DrawElementsCmd(buffer, DrawMode.Points);
picker.Node.Render4InnerPicking(arg, IndexAccessMode.ByFrame, cmd);
uint id = ColorCodedPicking.ReadStageVertexId(arg.X, arg.Y);
buffer.Dispose();
if (lastVertexId - 3 <= id && id <= lastVertexId - 0)
{
return(id);
}
else
{
throw new Exception("This should not happen!");
}
}
/// <summary>
///
/// </summary>
/// <param name="arg"></param>
/// <param name="primitiveInfo"></param>
/// <param name="picker"></param>
/// <returns></returns>
internal override uint Search(PickingEventArgs arg,
RecognizedPrimitiveInfo primitiveInfo,
DrawElementsPicker picker)
{
uint[] indexList = primitiveInfo.VertexIds;
if (indexList.Length != 4)
{
throw new ArgumentException();
}
IndexBuffer buffer = indexList.GenIndexBuffer(BufferUsage.StaticDraw);
var cmd = new DrawElementsCmd(buffer, DrawMode.Points);
picker.Node.Render4InnerPicking(arg, cmd);
uint id = ColorCodedPicking.ReadStageVertexId(arg.X, arg.Y);
buffer.Dispose();
if (id == indexList[0] || id == indexList[1] ||
id == indexList[2] || id == indexList[3])
{
return(id);
}
else
{
throw new Exception("This should not happen!");
}
}
protected override void RecognizeUInt(uint singleNodeVertexId, 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)
{
nearestRestartIndex = i;
}
else if (((i - 3 - nearestRestartIndex) % 4 == 0) &&
(value == singleNodeVertexId) &&
(array[i - 1] != primitiveRestartIndex) &&
(array[i - 2] != primitiveRestartIndex) &&
(array[i - 3] != primitiveRestartIndex))
{
var item = new RecognizedPrimitiveInfo(i, array[i - 3], array[i - 2], array[i - 1], singleNodeVertexId);
primitiveInfoList.Add(item);
}
}
}
indexBuffer.UnmapBuffer();
}
/// <summary>
/// 在三角形图元中拾取指定位置的Point
/// </summary>
/// <param name="arg">渲染参数</param>
/// <param name="flatColorVertexId">三角形图元的最后一个顶点</param>
/// <param name="picker">目标Renderer</param>
/// <returns></returns>
internal override uint Search(PickingEventArgs arg, uint flatColorVertexId, DrawArraysPicker picker)
{
// 创建临时索引
IndexBuffer buffer = GLBuffer.Create(IndexBufferElementType.UInt, 3, BufferUsage.StaticDraw);
unsafe
{
var array = (uint *)buffer.MapBuffer(MapBufferAccess.WriteOnly);
array[0] = flatColorVertexId - 0;
array[1] = flatColorVertexId - 1;
array[2] = flatColorVertexId - 2;
buffer.UnmapBuffer();
}
var cmd = new DrawElementsCmd(buffer, DrawMode.Points);
// 用临时索引渲染此三角形图元（仅渲染此三角形图元）
picker.Node.Render4InnerPicking(arg, cmd);
// id是拾取到的Line的Last Vertex Id
uint id = ColorCodedPicking.ReadStageVertexId(arg.X, arg.Y);
buffer.Dispose();
// 对比临时索引，找到那个Line
if (flatColorVertexId - 2 <= id && id <= flatColorVertexId - 0)
{
return(id);
}
else
{
throw new Exception("This should not happen!");
}
}
protected override void RecognizeByte(uint singleNodeVertexId, 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 + 2; i < length; i++)
{
var value = array[i];
if (value == primitiveRestartIndex)
{
// try the loop back line.
nearestRestartIndex = i;
}
else if (value == singleNodeVertexId &&
array[i - 1] != primitiveRestartIndex &&
array[nearestRestartIndex + 1] != primitiveRestartIndex &&
nearestRestartIndex + 2 < i)
{
var item = new RecognizedPrimitiveInfo(i, array[nearestRestartIndex + 1], array[i - 1], singleNodeVertexId);
primitiveInfoList.Add(item);
}
}
}
indexBuffer.UnmapBuffer();
}
/// <summary>
/// 识别出以<paramref name="lastVertexId"/>结尾的图元。
/// <para>识别过程中要考虑排除PrimitiveRestartIndex</para>
/// </summary>
/// <param name="lastVertexId"></param>
/// <param name="pointer"></param>
/// <param name="cmd"></param>
/// <param name="primitiveRestartIndex"></param>
/// <returns></returns>
public List <RecognizedPrimitiveInfo> Recognize(
uint lastVertexId, IntPtr pointer, DrawElementsCmd cmd, uint primitiveRestartIndex)
{
var lastIndexIdList = new List <RecognizedPrimitiveInfo>();
if (lastVertexId != primitiveRestartIndex)
{
switch (cmd.IndexBufferObject.ElementType)
{
case IndexBufferElementType.UByte:
RecognizeByte(lastVertexId, pointer, cmd, lastIndexIdList, primitiveRestartIndex);
break;
case IndexBufferElementType.UShort:
RecognizeUShort(lastVertexId, pointer, cmd, lastIndexIdList, primitiveRestartIndex);
break;
case IndexBufferElementType.UInt:
RecognizeUInt(lastVertexId, pointer, cmd, lastIndexIdList, primitiveRestartIndex);
break;
default:
throw new NotDealWithNewEnumItemException(typeof(IndexBufferElementType));
}
}
return(lastIndexIdList);
}
/// <summary>
///
/// </summary>
/// <param name="arg"></param>
/// <param name="twoPrimitivesIndexBuffer"></param>
/// <returns></returns>
private uint Pick(PickingEventArgs arg, DrawElementsCmd twoPrimitivesIndexBuffer)
{
this.Node.Render4InnerPicking(arg, ControlMode.ByFrame, twoPrimitivesIndexBuffer);
uint pickedIndex = ColorCodedPicking.ReadStageVertexId(arg.X, arg.Y);
return(pickedIndex);
}
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 + 1; i < length; i++)
{
var value = array[i];
if (value == primitiveRestartIndex)
{
// try the loop back line.
if (array[nearestRestartIndex + 1] == flatColorVertexId &&
array[i - 1] != primitiveRestartIndex &&
nearestRestartIndex + 1 < i - 1)
{
var item = new RecognizedPrimitiveInfo((uint)(nearestRestartIndex + 1), value, flatColorVertexId);
primitiveInfoList.Add(item);
}
nearestRestartIndex = i;
}
else if (value == flatColorVertexId &&
array[i - 1] != primitiveRestartIndex)
{
var item = new RecognizedPrimitiveInfo(i, array[i - 1], flatColorVertexId);
primitiveInfoList.Add(item);
}
}
if (array[nearestRestartIndex + 1] == flatColorVertexId &&
array[length - 1] != primitiveRestartIndex &&
nearestRestartIndex + 1 < length - 1)
{
var item = new RecognizedPrimitiveInfo((uint)(nearestRestartIndex + 1), array[length - 1], flatColorVertexId);
primitiveInfoList.Add(item);
}
}
indexBuffer.UnmapBuffer();
}
/// <summary>
///
/// </summary>
/// <param name="arg"></param>
/// <param name="primitiveInfo"></param>
/// <param name="singleNodeVertexId"></param>
/// <param name="stageVertexId"></param>
/// <param name="picker"></param>
/// <returns></returns>
internal override uint[] Search(PickingEventArgs arg,
RecognizedPrimitiveInfo primitiveInfo,
uint singleNodeVertexId, uint stageVertexId,
DrawElementsPicker picker)
{
uint[] vertexIds = primitiveInfo.VertexIds;
if (vertexIds.Length < 3)
{
throw new ArgumentException();
}
IndexBuffer buffer = vertexIds.GenIndexBuffer(BufferUsage.StaticDraw);
var cmd = new DrawElementsCmd(buffer, DrawMode.LineLoop);
picker.Node.Render4InnerPicking(arg, cmd);
uint id = ColorCodedPicking.ReadStageVertexId(arg.X, arg.Y);
buffer.Dispose();
uint baseId = stageVertexId - singleNodeVertexId;
if (id == baseId + vertexIds[0])
{
return(new uint[] { baseId + vertexIds[vertexIds.Length - 1], id, });
}
else
{
uint[] result = null;
for (int i = 1; i < vertexIds.Length; i++)
{
if (id == baseId + vertexIds[i])
{
result = new uint[] { baseId + vertexIds[i - 1], id, };
break;
}
}
if (result != null)
{
return(result);
}
else
{
throw new Exception("This should not happen!");
}
}
}
/// <summary>
///
/// </summary>
/// <param name="arg"></param>
/// <param name="primitiveInfo"></param>
/// <param name="singleNodeVertexId"></param>
/// <param name="stageVertexId"></param>
/// <param name="picker"></param>
/// <returns></returns>
internal override uint[] Search(PickingEventArgs arg,
RecognizedPrimitiveInfo primitiveInfo,
uint singleNodeVertexId, uint stageVertexId,
DrawElementsPicker picker)
{
uint[] verttexIds = primitiveInfo.VertexIds;
if (verttexIds.Length != 3)
{
throw new ArgumentException();
}
//if (indexList[0] == indexList[1]) { return new uint[] { indexList[0], indexList[2], }; }
//else if (indexList[0] == indexList[2]) { return new uint[] { indexList[0], indexList[1], }; }
//else if (indexList[1] == indexList[2]) { return new uint[] { indexList[1], indexList[0], }; }
var targetVertexIds = new uint[6] {
verttexIds[0], verttexIds[1], verttexIds[1], verttexIds[2], verttexIds[2], verttexIds[0],
};
IndexBuffer buffer = targetVertexIds.GenIndexBuffer(BufferUsage.StaticDraw);
var cmd = new DrawElementsCmd(buffer, DrawMode.Lines);
picker.Node.Render4InnerPicking(arg, cmd);
uint id = ColorCodedPicking.ReadStageVertexId(arg.X, arg.Y);
buffer.Dispose();
uint baseId = stageVertexId - singleNodeVertexId;
if (id == baseId + verttexIds[1])
{
return(new uint[] { baseId + verttexIds[0], id, });
}
else if (id == baseId + verttexIds[2])
{
return(new uint[] { baseId + verttexIds[1], id, });
}
else if (id == baseId + verttexIds[0])
{
return(new uint[] { baseId + verttexIds[2], id, });
}
else
{
throw new Exception("This should not happen!");
}
}
protected override void RecognizeUShort(uint lastVertexId, IntPtr pointer, DrawElementsCmd cmd, List <RecognizedPrimitiveInfo> primitiveInfoList, uint primitiveRestartIndex)
{
int length = cmd.IndexBufferObject.Length;
unsafe
{
var array = (ushort *)pointer.ToPointer();
for (uint i = 0; i < length; i++)
{
var value = array[i];
if (value == lastVertexId)
{
var item = new RecognizedPrimitiveInfo(i, value);
primitiveInfoList.Add(item);
}
}
}
}
/// <summary>
///
/// </summary>
/// <param name="arg"></param>
/// <param name="primitiveInfo"></param>
/// <param name="picker"></param>
/// <returns></returns>
internal override uint[] Search(PickingEventArgs arg,
RecognizedPrimitiveInfo primitiveInfo,
DrawElementsPicker picker)
{
uint[] indexList = primitiveInfo.VertexIds;
if (indexList.Length < 3)
{
throw new ArgumentException();
}
IndexBuffer buffer = indexList.GenIndexBuffer(BufferUsage.StaticDraw);
var cmd = new DrawElementsCmd(buffer, DrawMode.LineLoop);
picker.Node.Render4InnerPicking(arg, IndexAccessMode.ByFrame, cmd);
uint id = ColorCodedPicking.ReadStageVertexId(arg.X, arg.Y);
buffer.Dispose();
if (id == indexList[0])
{
return(new uint[] { indexList[indexList.Length - 1], id, });
}
else
{
uint[] result = null;
for (int i = 1; i < indexList.Length; i++)
{
if (id == indexList[i])
{
result = new uint[] { indexList[i - 1], indexList[i], };
break;
}
}
if (result != null)
{
return(result);
}
else
{
throw new Exception("This should not happen!");
}
}
}
protected override void RecognizeUInt(uint lastVertexId, IntPtr pointer, DrawElementsCmd cmd, List <RecognizedPrimitiveInfo> primitiveInfoList)
{
int length = cmd.IndexBufferObject.Length;
unsafe
{
var array = (uint *)pointer.ToPointer();
uint i = 0;
for (i = i + 3; i < length; i++)
{
var value = array[i];
if (value == lastVertexId)
{
var item = new RecognizedPrimitiveInfo(i, array[i - 2], array[i - 3], array[i - 1], lastVertexId);
primitiveInfoList.Add(item);
}
}
}
}
/// <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, 8, BufferUsage.StaticDraw);
unsafe
{
var array = (uint *)buffer.MapBuffer(MapBufferAccess.WriteOnly);
array[0] = lastVertexId - 0; array[1] = lastVertexId - 2;
array[2] = lastVertexId - 2; array[3] = lastVertexId - 3;
array[4] = lastVertexId - 3; array[5] = lastVertexId - 1;
array[6] = lastVertexId - 1; array[7] = lastVertexId - 0;
buffer.UnmapBuffer();
}
var cmd = new DrawElementsCmd(buffer, DrawMode.Lines);
picker.Node.Render4InnerPicking(arg, ControlMode.ByFrame, cmd);
uint id = ColorCodedPicking.ReadStageVertexId(arg.X, arg.Y);
buffer.Dispose();
if (id + 2 == lastVertexId)
{
return(new uint[] { lastVertexId - 0, lastVertexId - 2, });
}
else if (id + 3 == lastVertexId)
{
return(new uint[] { lastVertexId - 2, lastVertexId - 3 });
}
else if (id + 1 == lastVertexId)
{
return(new uint[] { lastVertexId - 3, lastVertexId - 1, });
}
else if (id + 0 == lastVertexId)
{
return(new uint[] { lastVertexId - 1, lastVertexId - 0, });
}
else
{
throw new Exception("This should not happen!");
}
}
protected override void RecognizeUInt(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 = (uint *)pointer.ToPointer();
for (uint i = 0; i < length; i++)
{
var value = array[i];
if (value == lastVertexId)
{
var item = new RecognizedPrimitiveInfo(i, value);
primitiveInfoList.Add(item);
}
}
}
indexBuffer.UnmapBuffer();
}
protected override void RecognizeByte(uint lastVertexId, IntPtr pointer, DrawElementsCmd cmd, List <RecognizedPrimitiveInfo> primitiveInfoList)
{
int length = cmd.IndexBufferObject.Length;
unsafe
{
var array = (byte *)pointer.ToPointer();
long nearestRestartIndex = -1;
uint i = 0;
for (i = i + 2; i < length; i++)
{
var value = array[i];
if (value == lastVertexId &&
(i - nearestRestartIndex) % 3 == 0)
{
var item = new RecognizedPrimitiveInfo(i, array[i - 2], array[i - 1], lastVertexId);
primitiveInfoList.Add(item);
}
}
}
}
protected override void RecognizeUInt(uint flatColorVertexId, 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();
uint i = 0;
for (i = i + 1; i < length; i += 2)
{
var value = array[i];
if (value == flatColorVertexId)
{
var item = new RecognizedPrimitiveInfo(i, array[i - 1], flatColorVertexId);
primitiveInfoList.Add(item);
}
}
}
indexBuffer.UnmapBuffer();
}
protected override void RecognizeByte(uint singleNodeVertexId, 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 + 4; i < length; i += 6)
{
var value = array[i];
if (value == singleNodeVertexId)
{
var item = new RecognizedPrimitiveInfo(i, array[i - 4], array[i - 2], singleNodeVertexId);
primitiveInfoList.Add(item);
}
}
}
indexBuffer.UnmapBuffer();
}
/// <summary>
/// 在三角形图元中拾取指定位置的Line
/// </summary>
/// <param name="arg"></param>
/// <param name="singleNodeVertexId">三角形图元的最后一个顶点</param>
/// <param name="stageVertexId"></param>
/// <param name="picker"></param>
/// <returns></returns>
internal override uint[] Search(PickingEventArgs arg,
uint singleNodeVertexId, uint stageVertexId, DrawArraysPicker picker)
{
// 创建临时索引
var array = new uint[]
{
singleNodeVertexId - 1, singleNodeVertexId - 0,
singleNodeVertexId - 2, singleNodeVertexId - 1,
singleNodeVertexId - 0, singleNodeVertexId - 2
};
IndexBuffer buffer = array.GenIndexBuffer(BufferUsage.StaticDraw);
var cmd = new DrawElementsCmd(buffer, DrawMode.Lines);
// 用临时索引渲染此三角形图元（仅渲染此三角形图元）
picker.Node.Render4InnerPicking(arg, cmd);
// id是拾取到的Line的Last Vertex Id
uint id = ColorCodedPicking.ReadStageVertexId(arg.X, arg.Y);
buffer.Dispose();
// 对比临时索引，找到那个Line
if (id + 2 == stageVertexId)
{
return(new uint[] { id + 2, id, });
}
else if (id + 1 == stageVertexId)
{
return(new uint[] { id - 1, id, });
}
else if (id + 0 == stageVertexId)
{
return(new uint[] { id - 1, id, });
}
else
{
throw new Exception("This should not happen!");
}
}
/// <summary>
/// 将共享点前移，然后重新渲染、拾取
/// </summary>
/// <param name="recognizedPrimitiveIndex0"></param>
/// <param name="recognizedPrimitiveIndex1"></param>
/// <param name="singlePrimitiveMode"></param>
/// <param name="cmd"></param>
/// <param name="lastIndex0"></param>
/// <param name="lastIndex1"></param>
private void AssembleIndexBuffer(
RecognizedPrimitiveInfo recognizedPrimitiveIndex0,
RecognizedPrimitiveInfo recognizedPrimitiveIndex1,
DrawMode singlePrimitiveMode,
out DrawElementsCmd cmd,
out uint lastIndex0, out uint lastIndex1)
{
List <uint> indexArray = ArrangeIndexes(
recognizedPrimitiveIndex0, recognizedPrimitiveIndex1,
out lastIndex0, out lastIndex1);
if (indexArray.Count !=
recognizedPrimitiveIndex0.VertexIds.Length
+ 1
+ recognizedPrimitiveIndex1.VertexIds.Length)
{
throw new Exception(string.Format("index array[{0}] not same length with [recognized primitive1 index length{1}] + [1] + recognized primitive2 index length[{2}]", indexArray.Count, recognizedPrimitiveIndex0.VertexIds.Length, recognizedPrimitiveIndex1.VertexIds.Length));
}
IndexBuffer buffer = indexArray.ToArray().GenIndexBuffer(BufferUsage.StaticDraw);
cmd = new DrawElementsCmd(buffer, singlePrimitiveMode, uint.MaxValue);// uint.MaxValue in glPrimitiveRestartIndex();
//oneIndexBuffer = Buffer.Create(IndexElementType.UInt,
// recognizedPrimitiveIndex0.VertexIds.Length
// + 1
// + recognizedPrimitiveIndex1.VertexIds.Length,
// singlePrimitiveMode, BufferUsage.StaticDraw);
//unsafe
//{
// var array = (uint*)oneIndexBuffer.MapBuffer(MapBufferAccess.WriteOnly);
// for (int i = 0; i < indexArray.Count; i++)
// {
// array[i] = indexArray[i];
// }
// oneIndexBuffer.UnmapBuffer();
//}
}
protected override void RecognizeUShort(uint lastVertexId, 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 + 3; i < length; i++)
{
var value = array[i];
if (value == lastVertexId &&
(i - 3) % 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 RecognizeByte(uint lastVertexId, IntPtr pointer, DrawElementsCmd cmd, List <RecognizedPrimitiveInfo> primitiveInfoList)
{
int length = cmd.IndexBufferObject.Length;
unsafe
{
var array = (byte *)pointer.ToPointer();
for (uint i = 1; i < length; i++)
{
var value = array[i];
if (value == lastVertexId)
{
var item = new RecognizedPrimitiveInfo(i, array[i - 1], lastVertexId);
primitiveInfoList.Add(item);
}
}
if (array[0] == lastVertexId &&
length > 1)
{
var item = new RecognizedPrimitiveInfo(0, array[length - 1], lastVertexId);
primitiveInfoList.Add(item);
}
}
}
protected override void RecognizeByte(uint lastVertexId, 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();
//long nearestRestartIndex = -1;
uint i = 0;
for (i = i + 2; i < length; i += 3)
{
var value = array[i];
if (value == lastVertexId)
//&& (i - nearestRestartIndex) % 3 == 0)
{
var item = new RecognizedPrimitiveInfo(i, array[i - 2], array[i - 1], lastVertexId);
primitiveInfoList.Add(item);
}
}
}
indexBuffer.UnmapBuffer();
}
public OneIndexBufferController(DrawElementsCmd drawCmd)
{
this.drawCmd = drawCmd;
}
/// <summary>
/// Get picked geometry from a <see cref="PickableNode"/> with <see cref="DrawArraysCmd"/> as index buffer.
/// </summary>
/// <param name="node"></param>
/// <param name="positionBuffer"></param>
/// <param name="drawCommand"></param>
public DrawElementsPicker(PickableNode node, VertexBuffer positionBuffer, DrawElementsCmd drawCommand)
: base(node, positionBuffer)
{
this.DrawCommand = drawCommand;
}
protected abstract void RecognizeByte(uint lastVertexId, DrawElementsCmd cmd, List <RecognizedPrimitiveInfo> primitiveInfoList, uint primitiveRestartIndex);
protected abstract void RecognizeUShort(uint lastVertexId, DrawElementsCmd cmd, List <RecognizedPrimitiveInfo> primitiveInfoList);
