protected override void RecognizeByte(uint lastVertexId, IntPtr pointer, OneIndexBufferPtr oneIndexBufferPtr, List <RecognizedPrimitiveIndex> lastIndexIdList)
{
int length = oneIndexBufferPtr.Length;
unsafe
{
var array = (byte *)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 RecognizedPrimitiveIndex(lastVertexId, i);
item.IndexIdList.Add(array[i - 3]);
item.IndexIdList.Add(array[i - 2]);
item.IndexIdList.Add(array[i - 1]);
item.IndexIdList.Add(value);
lastIndexIdList.Add(item);
}
}
}
}
internal override uint[] Search(RenderEventArgs arg,
int x, int y,
RecognizedPrimitiveIndex lastIndexId,
OneIndexRenderer modernRenderer)
{
List <uint> indexList = lastIndexId.IndexIdList;
if (indexList.Count < 3)
{
throw new ArgumentException();
}
OneIndexBufferPtr indexBufferPtr = null;
using (var buffer = new OneIndexBuffer <uint>(DrawMode.LineLoop, BufferUsage.StaticDraw))
{
buffer.Create(indexList.Count);
unsafe
{
var array = (uint *)buffer.Header.ToPointer();
for (int i = 0; i < indexList.Count; i++)
{
array[i] = indexList[i];
}
}
indexBufferPtr = buffer.GetBufferPtr() as OneIndexBufferPtr;
}
modernRenderer.Render4InnerPicking(arg, indexBufferPtr);
uint id = ColorCodedPicking.ReadPixel(x, y, arg.CanvasRect.Height);
indexBufferPtr.Dispose();
if (id == indexList[0])
{
return(new uint[] { indexList[indexList.Count - 1], id, });
}
else
{
uint[] result = null;
for (int i = 1; i < indexList.Count; 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 RecognizeByte(uint lastVertexId, IntPtr pointer, OneIndexBufferPtr oneIndexBufferPtr, List<RecognizedPrimitiveIndex> lastIndexIdList, uint primitiveRestartIndex)
{
int length = oneIndexBufferPtr.Length;
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 == lastVertexId
&& array[i - 1] != primitiveRestartIndex
&& array[nearestRestartIndex + 1] != primitiveRestartIndex
&& nearestRestartIndex + 2 < i)
{
var item = new RecognizedPrimitiveIndex(lastVertexId, i);
item.IndexIdList.Add(array[nearestRestartIndex + 1]);
item.IndexIdList.Add(array[i - 1]);
item.IndexIdList.Add(value);
lastIndexIdList.Add(item);
}
}
}
}
protected override void RecognizeUInt(uint lastVertexId, IntPtr pointer, OneIndexBufferPtr oneIndexBufferPtr, List <RecognizedPrimitiveIndex> lastIndexIdList, uint primitiveRestartIndex)
{
int length = oneIndexBufferPtr.Length;
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)
{
nearestRestartIndex = i;
}
else if (value == lastVertexId &&
array[i - 1] != primitiveRestartIndex &&
(i - nearestRestartIndex) % 2 == 0)
{
var item = new RecognizedPrimitiveIndex(lastVertexId, i);
item.IndexIdList.Add(array[i - 1]);
item.IndexIdList.Add(value);
lastIndexIdList.Add(item);
}
}
}
}
internal override uint Search(RenderEventArgs arg,
int x, int y,
RecognizedPrimitiveIndex lastIndexId,
OneIndexRenderer modernRenderer)
{
List<uint> indexList = lastIndexId.IndexIdList;
if (indexList.Count < 3) { throw new ArgumentException(); }
OneIndexBufferPtr indexBufferPtr = null;
using (var buffer = new OneIndexBuffer<uint>(DrawMode.Points, BufferUsage.StaticDraw))
{
buffer.Alloc(indexList.Count);
unsafe
{
var array = (uint*)buffer.Header.ToPointer();
for (int i = 0; i < indexList.Count; i++)
{
array[i] = indexList[i];
}
}
indexBufferPtr = buffer.GetBufferPtr() as OneIndexBufferPtr;
}
modernRenderer.Render4InnerPicking(arg, indexBufferPtr);
uint id = ColorCodedPicking.ReadPixel(x, y, arg.CanvasRect.Height);
indexBufferPtr.Dispose();
if (id != uint.MaxValue)
{ return id; }
else
{ throw new Exception("This should not happen!"); }
}
protected override void RecognizeUInt(uint lastVertexId, IntPtr pointer, OneIndexBufferPtr oneIndexBufferPtr,
List <RecognizedPrimitiveIndex> lastIndexIdList)
{
int length = oneIndexBufferPtr.Length;
unsafe
{
var array = (uint *)pointer.ToPointer();
for (uint i = 1; i < length; i++)
{
var value = array[i];
if (value == lastVertexId)
{
var item = new RecognizedPrimitiveIndex(lastVertexId, i);
item.IndexIdList.Add(array[i - 1]);
item.IndexIdList.Add(value);
lastIndexIdList.Add(item);
}
}
if (array[0] == lastVertexId &&
length > 1)
{
var item = new RecognizedPrimitiveIndex(lastVertexId, 0);
item.IndexIdList.Add(array[length - 1]);
item.IndexIdList.Add(lastVertexId);
lastIndexIdList.Add(item);
}
}
}
/// <summary>
/// 将共享点前移，构成2个图元组成的新的小小的索引。
/// </summary>
/// <param name="recognizedPrimitiveIndex0"></param>
/// <param name="recognizedPrimitiveIndex1"></param>
/// <returns></returns>
private List<uint> ArrangeIndexes(
RecognizedPrimitiveIndex recognizedPrimitiveIndex0,
RecognizedPrimitiveIndex recognizedPrimitiveIndex1,
DrawMode drawMode,
out uint lastIndex0, out uint lastIndex1)
{
List<uint> sameIndexList = new List<uint>();
List<uint> array0 = new List<uint>(recognizedPrimitiveIndex0.IndexIdList);
List<uint> array1 = new List<uint>(recognizedPrimitiveIndex1.IndexIdList);
array0.Sort(); array1.Sort();
int p0 = 0, p1 = 0;
while (p0 < array0.Count && p1 < array1.Count)
{
if (array0[p0] < array1[p1])
{ p0++; }
else if (array0[p0] > array1[p1])
{ p1++; }
else
{
sameIndexList.Add(array0[p0]);
array0.RemoveAt(p0);
array1.RemoveAt(p1);
}
}
if (array0.Count == 0 && array1.Count == 0)
{ throw new Exception("Two primitives are totally the same!"); }
if (array0.Count > 0)
{ lastIndex0 = array0.Last(); }
else
{
if (sameIndexList.Count == 0)
{ throw new Exception("array0 is totally empty!"); }
lastIndex0 = sameIndexList.Last();
}
if (array1.Count > 0)
{ lastIndex1 = array1.Last(); }
else
{
if (sameIndexList.Count == 0)
{ throw new Exception("array1 is totally empty!"); }
lastIndex1 = sameIndexList.Last();
}
if (lastIndex0 == lastIndex1) { throw new Exception(); }
List<uint> result = new List<uint>();
result.AddRange(sameIndexList);
result.AddRange(array0);
result.Add(uint.MaxValue);// primitive restart index
result.AddRange(sameIndexList);
result.AddRange(array1);
return result;
}
internal override uint[] Search(RenderEventArgs arg,
int x, int y,
RecognizedPrimitiveIndex lastIndexId,
OneIndexRenderer modernRenderer)
{
List <uint> indexList = lastIndexId.IndexIdList;
if (indexList.Count != 4)
{
throw new ArgumentException();
}
OneIndexBufferPtr indexBufferPtr = null;
using (var buffer = new OneIndexBuffer <uint>(DrawMode.Lines, BufferUsage.StaticDraw))
{
buffer.Create(8);
unsafe
{
var array = (uint *)buffer.Header.ToPointer();
array[0] = indexList[0]; array[1] = indexList[1];
array[2] = indexList[1]; array[3] = indexList[2];
array[4] = indexList[2]; array[5] = indexList[3];
array[6] = indexList[3]; array[7] = indexList[0];
}
indexBufferPtr = buffer.GetBufferPtr() as OneIndexBufferPtr;
}
modernRenderer.Render4InnerPicking(arg, indexBufferPtr);
uint id = ColorCodedPicking.ReadPixel(x, y, arg.CanvasRect.Height);
indexBufferPtr.Dispose();
if (id == indexList[1])
{
return(new uint[] { indexList[0], indexList[1], });
}
else if (id == indexList[2])
{
return(new uint[] { indexList[1], indexList[2], });
}
else if (id == indexList[3])
{
return(new uint[] { indexList[2], indexList[3], });
}
else if (id == indexList[0])
{
return(new uint[] { indexList[2], indexList[0], });
}
else
{
throw new Exception("This should not happen!");
}
}
/// <summary>
/// 是三角形，就pick一个三角形；是四边形，就pick一个四边形，是多边形，就pick一个多边形。
/// </summary>
/// <param name="stageVertexId"></param>
/// <param name="lastIndexId"></param>
/// <param name="typeOfMode"></param>
/// <returns></returns>
private PickedGeometry PickWhateverItIs(uint stageVertexId, RecognizedPrimitiveIndex lastIndexId, GeometryType typeOfMode)
{
PickedGeometry pickedGeometry = new PickedGeometry();
pickedGeometry.GeometryType = typeOfMode;
pickedGeometry.StageVertexId = stageVertexId;
pickedGeometry.From = this;
pickedGeometry.Indexes = lastIndexId.IndexIdList.ToArray();
pickedGeometry.Positions = FillPickedGeometrysPosition(pickedGeometry.Indexes);
return(pickedGeometry);
}
protected override void RecognizeByte(uint lastVertexId, IntPtr pointer, OneIndexBufferPtr oneIndexBufferPtr, List <RecognizedPrimitiveIndex> lastIndexIdList, uint primitiveRestartIndex)
{
int length = oneIndexBufferPtr.Length;
unsafe
{
var array = (byte *)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] == lastVertexId &&
array[i - 1] != primitiveRestartIndex &&
nearestRestartIndex + 1 < i - 1)
{
var item = new RecognizedPrimitiveIndex(lastVertexId, (uint)(nearestRestartIndex + 1));
item.IndexIdList.Add(value);
item.IndexIdList.Add(lastVertexId);
lastIndexIdList.Add(item);
}
nearestRestartIndex = i;
}
else if (value == lastVertexId &&
array[i - 1] != primitiveRestartIndex)
{
var item = new RecognizedPrimitiveIndex(lastVertexId, i);
item.IndexIdList.Add(array[i - 1]);
item.IndexIdList.Add(value);
lastIndexIdList.Add(item);
}
}
if (array[nearestRestartIndex + 1] == lastVertexId &&
array[length - 1] != primitiveRestartIndex &&
nearestRestartIndex + 1 < length - 1)
{
var item = new RecognizedPrimitiveIndex(lastVertexId, (uint)(nearestRestartIndex + 1));
item.IndexIdList.Add(array[length - 1]);
item.IndexIdList.Add(lastVertexId);
lastIndexIdList.Add(item);
}
}
}
internal override uint[] Search(RenderEventArg arg,
int x, int y,
RecognizedPrimitiveIndex lastIndexId,
OneIndexRenderer modernRenderer)
{
List<uint> indexList = lastIndexId.IndexIdList;
if (indexList.Count < 3) { throw new ArgumentException(); }
OneIndexBufferPtr indexBufferPtr = null;
using (var buffer = new OneIndexBuffer<uint>(DrawMode.LineLoop, BufferUsage.StaticDraw))
{
buffer.Alloc(indexList.Count);
unsafe
{
var array = (uint*)buffer.Header.ToPointer();
for (int i = 0; i < indexList.Count; i++)
{
array[i] = indexList[i];
}
}
indexBufferPtr = buffer.GetBufferPtr() as OneIndexBufferPtr;
}
modernRenderer.Render4InnerPicking(arg, indexBufferPtr);
uint id = ColorCodedPicking.ReadPixel(x, y, arg.CanvasRect.Height);
indexBufferPtr.Dispose();
if (id == indexList[0])
{ return new uint[] { indexList[indexList.Count - 1], id, }; }
else
{
uint[] result = null;
for (int i = 1; i < indexList.Count; 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!"); }
}
}
private RecognizedPrimitiveIndex GetLastIndexIdOfPickedGeometry(
RenderEventArgs arg,
uint lastVertexId, int x, int y)
{
List <RecognizedPrimitiveIndex> lastIndexIdList = GetLastIndexIdList(arg, lastVertexId);
if (lastIndexIdList.Count == 0)
{
return(null);
}
RecognizedPrimitiveIndex lastIndexId = GetLastIndexId(
arg, lastIndexIdList, x, y);
return(lastIndexId);
}
protected override void RecognizeUInt(uint lastVertexId, IntPtr pointer, OneIndexBufferPtr oneIndexBufferPtr, List<RecognizedPrimitiveIndex> lastIndexIdList, uint primitiveRestartIndex)
{
int length = oneIndexBufferPtr.Length;
unsafe
{
var array = (uint*)pointer.ToPointer();
for (uint i = 0; i < length; i++)
{
var value = array[i];
if (value == lastVertexId)
{
var item = new RecognizedPrimitiveIndex(lastVertexId, i);
item.IndexIdList.Add(value);
lastIndexIdList.Add(item);
}
}
}
}
protected override void RecognizeUShort(uint lastVertexId, IntPtr pointer, OneIndexBufferPtr oneIndexBufferPtr, List <RecognizedPrimitiveIndex> lastIndexIdList, uint primitiveRestartIndex)
{
int length = oneIndexBufferPtr.Length;
unsafe
{
var array = (ushort *)pointer.ToPointer();
for (uint i = 0; i < length; i++)
{
var value = array[i];
if (value == lastVertexId)
{
var item = new RecognizedPrimitiveIndex(lastVertexId, i);
item.IndexIdList.Add(value);
lastIndexIdList.Add(item);
}
}
}
}
internal override uint Search(RenderEventArgs arg,
int x, int y,
RecognizedPrimitiveIndex lastIndexId,
OneIndexRenderer modernRenderer)
{
List <uint> indexList = lastIndexId.IndexIdList;
if (indexList.Count < 3)
{
throw new ArgumentException();
}
OneIndexBufferPtr indexBufferPtr = null;
using (var buffer = new OneIndexBuffer <uint>(DrawMode.Points, BufferUsage.StaticDraw))
{
buffer.Alloc(indexList.Count);
unsafe
{
var array = (uint *)buffer.Header.ToPointer();
for (int i = 0; i < indexList.Count; i++)
{
array[i] = indexList[i];
}
}
indexBufferPtr = buffer.GetBufferPtr() as OneIndexBufferPtr;
}
modernRenderer.Render4InnerPicking(arg, indexBufferPtr);
uint id = ColorCodedPicking.ReadPixel(x, y, arg.CanvasRect.Height);
indexBufferPtr.Dispose();
if (id != uint.MaxValue)
{
return(id);
}
else
{
throw new Exception("This should not happen!");
}
}
internal override uint[] Search(RenderEventArgs arg,
int x, int y,
RecognizedPrimitiveIndex lastIndexId,
OneIndexRenderer modernRenderer)
{
List<uint> indexList = lastIndexId.IndexIdList;
if (indexList.Count != 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], }; }
OneIndexBufferPtr indexBufferPtr = null;
using (var buffer = new OneIndexBuffer<uint>(DrawMode.Lines, BufferUsage.StaticDraw))
{
buffer.Alloc(6);
unsafe
{
var array = (uint*)buffer.Header.ToPointer();
array[0] = indexList[0]; array[1] = indexList[1];
array[2] = indexList[1]; array[3] = indexList[2];
array[4] = indexList[2]; array[5] = indexList[0];
}
indexBufferPtr = buffer.GetBufferPtr() as OneIndexBufferPtr;
}
modernRenderer.Render4InnerPicking(arg, indexBufferPtr);
uint id = ColorCodedPicking.ReadPixel(x, y, arg.CanvasRect.Height);
indexBufferPtr.Dispose();
if (id == indexList[1])
{ return new uint[] { indexList[0], indexList[1], }; }
else if (id == indexList[2])
{ return new uint[] { indexList[1], indexList[2], }; }
else if (id == indexList[0])
{ return new uint[] { indexList[2], indexList[0], }; }
else
{ throw new Exception("This should not happen!"); }
}
protected override void RecognizeByte(uint lastVertexId, IntPtr pointer, OneIndexBufferPtr oneIndexBufferPtr, List<RecognizedPrimitiveIndex> lastIndexIdList)
{
int length = oneIndexBufferPtr.Length;
unsafe
{
var array = (byte*)pointer.ToPointer();
uint i = 0;
for (i = i + 2; i < length; i++)
{
var value = array[i];
if (value == lastVertexId)
{
var item = new RecognizedPrimitiveIndex(lastVertexId, i);
item.IndexIdList.Add(array[0]);
item.IndexIdList.Add(array[i - 1]);
item.IndexIdList.Add(value);
lastIndexIdList.Add(item);
}
}
}
}
protected override void RecognizeUInt(uint lastVertexId, IntPtr pointer, OneIndexBufferPtr oneIndexBufferPtr, List<RecognizedPrimitiveIndex> lastIndexIdList)
{
int length = oneIndexBufferPtr.Length;
unsafe
{
var array = (uint*)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 RecognizedPrimitiveIndex(lastVertexId, i);
item.IndexIdList.Add(array[i - 2]);
item.IndexIdList.Add(array[i - 1]);
item.IndexIdList.Add(value);
lastIndexIdList.Add(item);
}
}
}
}
/// <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="drawMode"></param>
/// <param name="oneIndexBufferPtr"></param>
/// <param name="lastIndex0"></param>
/// <param name="lastIndex1"></param>
private void AssembleIndexBuffer(
RecognizedPrimitiveIndex recognizedPrimitiveIndex0,
RecognizedPrimitiveIndex recognizedPrimitiveIndex1,
DrawMode drawMode,
out OneIndexBufferPtr oneIndexBufferPtr,
out uint lastIndex0, out uint lastIndex1)
{
List <uint> indexArray = ArrangeIndexes(
recognizedPrimitiveIndex0, recognizedPrimitiveIndex1, drawMode,
out lastIndex0, out lastIndex1);
if (indexArray.Count !=
recognizedPrimitiveIndex0.IndexIdList.Count
+ 1
+ recognizedPrimitiveIndex1.IndexIdList.Count)
{
throw new Exception();
}
using (var indexBuffer = new OneIndexBuffer <uint>(drawMode, BufferUsage.StaticDraw))
{
indexBuffer.Create(
recognizedPrimitiveIndex0.IndexIdList.Count
+ 1
+ recognizedPrimitiveIndex1.IndexIdList.Count);
unsafe
{
var array = (uint *)indexBuffer.Header.ToPointer();
for (int i = 0; i < indexArray.Count; i++)
{
array[i] = indexArray[i];
}
}
oneIndexBufferPtr = indexBuffer.GetBufferPtr() as OneIndexBufferPtr;
}
}
/// <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="drawMode"></param>
/// <param name="oneIndexBufferPtr"></param>
/// <param name="lastIndex0"></param>
/// <param name="lastIndex1"></param>
private void AssembleIndexBuffer(
RecognizedPrimitiveIndex recognizedPrimitiveIndex0,
RecognizedPrimitiveIndex recognizedPrimitiveIndex1,
DrawMode drawMode,
out OneIndexBufferPtr oneIndexBufferPtr,
out uint lastIndex0, out uint lastIndex1)
{
List<uint> indexArray = ArrangeIndexes(
recognizedPrimitiveIndex0, recognizedPrimitiveIndex1, drawMode,
out lastIndex0, out lastIndex1);
if (indexArray.Count !=
recognizedPrimitiveIndex0.IndexIdList.Count
+ 1
+ recognizedPrimitiveIndex1.IndexIdList.Count)
{ throw new Exception(); }
using (var indexBuffer = new OneIndexBuffer<uint>(drawMode, BufferUsage.StaticDraw))
{
indexBuffer.Alloc(
recognizedPrimitiveIndex0.IndexIdList.Count
+ 1
+ recognizedPrimitiveIndex1.IndexIdList.Count);
unsafe
{
var array = (uint*)indexBuffer.Header.ToPointer();
for (int i = 0; i < indexArray.Count; i++)
{
array[i] = indexArray[i];
}
}
oneIndexBufferPtr = indexBuffer.GetBufferPtr() as OneIndexBufferPtr;
}
}
internal abstract uint[] Search(RenderEventArg arg,
int x, int y,
RecognizedPrimitiveIndex lastIndexId,
OneIndexRenderer modernRenderer);
protected override void RecognizeUShort(uint lastVertexId, IntPtr pointer, OneIndexBufferPtr oneIndexBufferPtr, List<RecognizedPrimitiveIndex> lastIndexIdList, uint primitiveRestartIndex)
{
int length = oneIndexBufferPtr.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)
{
nearestRestartIndex = i;
}
else if (value == lastVertexId
&& array[i - 1] != primitiveRestartIndex
&& (i - nearestRestartIndex) % 2 == 0)
{
var item = new RecognizedPrimitiveIndex(lastVertexId, i);
item.IndexIdList.Add(array[i - 1]);
item.IndexIdList.Add(value);
lastIndexIdList.Add(item);
}
}
}
}
private PickedGeometry SearchLine(RenderEventArgs arg, uint stageVertexId, int x, int y, uint lastVertexId, RecognizedPrimitiveIndex lastIndexId, OneIndexLineSearcher searcher)
{
PickedGeometry pickedGeometry = new PickedGeometry();
pickedGeometry.From = this;
pickedGeometry.GeometryType = GeometryType.Line;
pickedGeometry.StageVertexId = stageVertexId;
pickedGeometry.Indexes = searcher.Search(arg, x, y, lastIndexId, this);
pickedGeometry.Positions = FillPickedGeometrysPosition(pickedGeometry.Indexes);
return(pickedGeometry);
}
public override PickedGeometry Pick(RenderEventArgs arg, uint stageVertexId,
int x, int y)
{
uint lastVertexId;
if (!this.GetLastVertexIdOfPickedGeometry(stageVertexId, out lastVertexId))
{
return(null);
}
// 找到 lastIndexId
RecognizedPrimitiveIndex lastIndexId = this.GetLastIndexIdOfPickedGeometry(
arg, lastVertexId, x, y);
if (lastIndexId == null)
{
Debug.WriteLine(
"Got lastVertexId[{0}] but no lastIndexId! Params are [{1}] [{2}] [{3}] [{4}]",
lastVertexId, arg, stageVertexId, x, y);
{ return(null); }
}
GeometryType geometryType = arg.PickingGeometryType;
DrawMode mode = this.indexBufferPtr.Mode;
GeometryType typeOfMode = mode.ToGeometryType();
if (geometryType == GeometryType.Point)
{
// 获取pickedGeometry
if (typeOfMode == GeometryType.Point)
{
return(PickWhateverItIs(stageVertexId, lastIndexId, typeOfMode));
}
else if (typeOfMode == GeometryType.Line)
{
if (this.OnPrimitiveTest(lastVertexId, mode))
{
return(PickPoint(stageVertexId, lastVertexId));
}
else
{
return(null);
}
}
else
{
OneIndexPointSearcher searcher = GetPointSearcher(mode);
if (searcher != null)// line is from triangle, quad or polygon
{
return(SearchPoint(arg, stageVertexId, x, y, lastVertexId, lastIndexId, searcher));
}
else
{
throw new Exception(string.Format("Lack of searcher for [{0}]", mode));
}
}
}
else if (geometryType == GeometryType.Line)
{
// 获取pickedGeometry
if (geometryType == typeOfMode)
{
return(PickWhateverItIs(stageVertexId, lastIndexId, typeOfMode));
}
else
{
OneIndexLineSearcher searcher = GetLineSearcher(mode);
if (searcher != null)// line is from triangle, quad or polygon
{
return(SearchLine(arg, stageVertexId, x, y, lastVertexId, lastIndexId, searcher));
}
else if (mode == DrawMode.Points)// want a line when rendering GL_POINTS
{
return(null);
}
else
{
throw new Exception(string.Format("Lack of searcher for [{0}]", mode));
}
}
}
else
{
if (typeOfMode == geometryType)// I want what it is
{
return(PickWhateverItIs(stageVertexId, lastIndexId, typeOfMode));
}
else
{
return(null);
}
//{ throw new Exception(string.Format("Lack of searcher for [{0}]", mode)); }
}
}
internal abstract uint Search(RenderEventArgs arg,
int x, int y,
RecognizedPrimitiveIndex lastIndexId,
OneIndexRenderer modernRenderer);
/// <summary>
/// 将共享点前移，构成2个图元组成的新的小小的索引。
/// </summary>
/// <param name="recognizedPrimitiveIndex0"></param>
/// <param name="recognizedPrimitiveIndex1"></param>
/// <param name="drawMode"></param>
/// <param name="lastIndex0"></param>
/// <param name="lastIndex1"></param>
/// <returns></returns>
private List <uint> ArrangeIndexes(
RecognizedPrimitiveIndex recognizedPrimitiveIndex0,
RecognizedPrimitiveIndex recognizedPrimitiveIndex1,
DrawMode drawMode,
out uint lastIndex0, out uint lastIndex1)
{
List <uint> sameIndexList = new List <uint>();
List <uint> array0 = new List <uint>(recognizedPrimitiveIndex0.IndexIdList);
List <uint> array1 = new List <uint>(recognizedPrimitiveIndex1.IndexIdList);
array0.Sort(); array1.Sort();
int p0 = 0, p1 = 0;
while (p0 < array0.Count && p1 < array1.Count)
{
if (array0[p0] < array1[p1])
{
p0++;
}
else if (array0[p0] > array1[p1])
{
p1++;
}
else
{
sameIndexList.Add(array0[p0]);
array0.RemoveAt(p0);
array1.RemoveAt(p1);
}
}
if (array0.Count == 0 && array1.Count == 0)
{
throw new Exception("Two primitives are totally the same!");
}
if (array0.Count > 0)
{
lastIndex0 = array0.Last();
}
else
{
if (sameIndexList.Count == 0)
{
throw new Exception("array0 is totally empty!");
}
lastIndex0 = sameIndexList.Last();
}
if (array1.Count > 0)
{
lastIndex1 = array1.Last();
}
else
{
if (sameIndexList.Count == 0)
{
throw new Exception("array1 is totally empty!");
}
lastIndex1 = sameIndexList.Last();
}
if (lastIndex0 == lastIndex1)
{
throw new Exception();
}
List <uint> result = new List <uint>();
result.AddRange(sameIndexList);
result.AddRange(array0);
result.Add(uint.MaxValue);// primitive restart index
result.AddRange(sameIndexList);
result.AddRange(array1);
return(result);
}
