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);
}
}
}
}
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);
}
}
}
}
protected override void RecognizeUInt(uint lastVertexId, IntPtr pointer, OneIndexBufferPtr oneIndexBufferPtr, List <RecognizedPrimitiveInfo> primitiveInfoList, 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 + 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[i - 2] != primitiveRestartIndex
)
{
var item = new RecognizedPrimitiveInfo(i, array[i - 2], array[i - 1], lastVertexId);
primitiveInfoList.Add(item);
}
}
}
}
/// <summary>
/// 识别出以<paramref name="lastVertexId"/>结尾的图元。
/// </summary>
/// <param name="lastVertexId"></param>
/// <param name="pointer"></param>
/// <param name="oneIndexBufferPtr"></param>
/// <returns></returns>
public List <RecognizedPrimitiveInfo> Recognize(
uint lastVertexId, IntPtr pointer, OneIndexBufferPtr oneIndexBufferPtr)
{
var lastIndexIdList = new List <RecognizedPrimitiveInfo>();
switch (oneIndexBufferPtr.Type)
{
case IndexElementType.UByte:
RecognizeByte(lastVertexId, pointer, oneIndexBufferPtr, lastIndexIdList);
break;
case IndexElementType.UShort:
RecognizeUShort(lastVertexId, pointer, oneIndexBufferPtr, lastIndexIdList);
break;
case IndexElementType.UInt:
RecognizeUInt(lastVertexId, pointer, oneIndexBufferPtr, lastIndexIdList);
break;
default:
throw new NotImplementedException();
}
return(lastIndexIdList);
}
internal override uint[] Search(RenderEventArgs arg,
int x, int y,
uint lastVertexId, ZeroIndexRenderer modernRenderer)
{
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] = lastVertexId - 2; array[1] = lastVertexId - 0;
array[2] = lastVertexId - 4; array[3] = lastVertexId - 2;
array[4] = lastVertexId - 0; array[5] = lastVertexId - 4;
}
indexBufferPtr = buffer.GetBufferPtr() as OneIndexBufferPtr;
}
modernRenderer.Render4InnerPicking(arg, indexBufferPtr);
uint id = ColorCodedPicking.ReadPixel(x, y, arg.CanvasRect.Height);
indexBufferPtr.Dispose();
if (id + 4 == lastVertexId)
{
return(new uint[] { id + 4, id, });
}
else
{
return(new uint[] { id - 2, id, });
}
}
protected override void RecognizeUInt(uint lastVertexId, IntPtr pointer, OneIndexBufferPtr oneIndexBufferPtr,
List <RecognizedPrimitiveInfo> primitiveInfoList)
{
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 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);
}
}
}
public PrimitiveRestartSwitch(OneIndexBufferPtr indexBufferPtr)
: base(OpenGL.GL_PRIMITIVE_RESTART, true)
{
if (indexBufferPtr == null)
{
throw new ArgumentException();
}
switch (indexBufferPtr.Type)
{
case IndexElementType.UnsignedByte:
this.RestartIndex = byte.MaxValue;
break;
case IndexElementType.UnsignedShort:
this.RestartIndex = ushort.MaxValue;
break;
case IndexElementType.UnsignedInt:
this.RestartIndex = uint.MaxValue;
break;
default:
break;
}
}
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 RecognizeUShort(uint lastVertexId, IntPtr pointer, OneIndexBufferPtr oneIndexBufferPtr, List <RecognizedPrimitiveIndex> lastIndexIdList)
{
int length = oneIndexBufferPtr.Length;
unsafe
{
var array = (ushort *)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>
/// 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="oneIndexBufferPtr"></param>
/// <param name="primitiveRestartIndex"></param>
/// <returns></returns>
public List <RecognizedPrimitiveIndex> Recognize(
uint lastVertexId, IntPtr pointer, OneIndexBufferPtr oneIndexBufferPtr, uint primitiveRestartIndex)
{
var lastIndexIdList = new List <RecognizedPrimitiveIndex>();
if (lastVertexId != primitiveRestartIndex)
{
switch (oneIndexBufferPtr.Type)
{
case IndexElementType.UnsignedByte:
RecognizeByte(lastVertexId, pointer, oneIndexBufferPtr, lastIndexIdList, primitiveRestartIndex);
break;
case IndexElementType.UnsighedShort:
RecognizeUShort(lastVertexId, pointer, oneIndexBufferPtr, lastIndexIdList, primitiveRestartIndex);
break;
case IndexElementType.UnsignedInt:
RecognizeUInt(lastVertexId, pointer, oneIndexBufferPtr, lastIndexIdList, primitiveRestartIndex);
break;
default:
throw new NotImplementedException();
}
}
return(lastIndexIdList);
}
internal override uint Search(RenderEventArgs arg,
int x, int y,
uint lastVertexId, ZeroIndexRenderer modernRenderer)
{
OneIndexBufferPtr indexBufferPtr = null;
using (var buffer = new OneIndexBuffer(IndexElementType.UInt, DrawMode.Points, BufferUsage.StaticDraw))
{
buffer.Create(3);
unsafe
{
var array = (uint *)buffer.Header.ToPointer();
array[0] = 0;
array[1] = lastVertexId - 1;
array[2] = lastVertexId - 0;
}
indexBufferPtr = buffer.GetBufferPtr() as OneIndexBufferPtr;
}
modernRenderer.Render4InnerPicking(arg, indexBufferPtr);
uint id = ColorCodedPicking.ReadPixel(x, arg.CanvasRect.Height - y - 1);
indexBufferPtr.Dispose();
if (0 == id || lastVertexId - 1 == id || lastVertexId - 0 == id)
{
return(id);
}
else
{
throw new Exception("This should not happen!");
}
}
internal override uint Search(RenderEventArgs arg,
int x, int y,
uint lastVertexId, ZeroIndexRenderer modernRenderer)
{
OneIndexBufferPtr indexBufferPtr = null;
using (var buffer = new OneIndexBuffer <uint>(DrawMode.Points, BufferUsage.StaticDraw))
{
buffer.Alloc(4);
unsafe
{
var array = (uint *)buffer.Header.ToPointer();
array[0] = lastVertexId - 0;
array[1] = lastVertexId - 1;
array[2] = lastVertexId - 2;
array[3] = lastVertexId - 3;
}
indexBufferPtr = buffer.GetBufferPtr() as OneIndexBufferPtr;
}
modernRenderer.Render4InnerPicking(arg, indexBufferPtr);
uint id = ColorCodedPicking.ReadPixel(x, y, arg.CanvasRect.Height);
indexBufferPtr.Dispose();
if (lastVertexId - 3 <= id && id <= lastVertexId - 0)
{
return(id);
}
else
{
throw new Exception("This should not happen!");
}
}
private uint Pick(RenderEventArgs arg, OneIndexBufferPtr twoPrimitivesIndexBufferPtr,
int x, int y)
{
Render4InnerPicking(arg, twoPrimitivesIndexBufferPtr);
uint pickedIndex = ColorCodedPicking.ReadPixel(x, y, arg.CanvasRect.Height);
return(pickedIndex);
}
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!");
}
}
internal override uint[] Search(RenderEventArgs arg,
int x, int y,
RecognizedPrimitiveInfo primitiveInfo,
OneIndexRenderer modernRenderer)
{
uint[] indexList = primitiveInfo.VertexIds;
if (indexList.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], }; }
OneIndexBufferPtr indexBufferPtr = null;
using (var buffer = new OneIndexBuffer(IndexElementType.UInt, DrawMode.Lines, BufferUsage.StaticDraw))
{
buffer.Create(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, arg.CanvasRect.Height - y - 1);
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 UnmanagedArrayBase CreateElements(int elementCount)
//{
// UnmanagedArrayBase result = null;
// switch (this.Type)
// {
// case IndexElementType.UnsignedByte:
// result = new UnmanagedArray<byte>(elementCount);
// break;
// case IndexElementType.UnsignedShort:
// result = new UnmanagedArray<ushort>(elementCount);
// break;
// case IndexElementType.UnsignedInt:
// result = new UnmanagedArray<uint>(elementCount);
// break;
// default:
// throw new NotImplementedException();
// }
// return result;
//}
protected override VertexBufferPtr Upload2GPU()
{
uint[] buffers = new uint[1];
GL.GetDelegateFor <GL.glGenBuffers>()(1, buffers);
GL.GetDelegateFor <GL.glBindBuffer>()(GL.GL_ELEMENT_ARRAY_BUFFER, buffers[0]);
GL.GetDelegateFor <GL.glBufferData>()(GL.GL_ELEMENT_ARRAY_BUFFER, this.ByteLength, this.Header, (uint)this.Usage);
OneIndexBufferPtr bufferPtr = new OneIndexBufferPtr(
buffers[0], this.Mode, this.ElementCount, this.Type, this.Length, this.ByteLength);
return(bufferPtr);
}
//protected override UnmanagedArrayBase CreateElements(int elementCount)
//{
// UnmanagedArrayBase result = null;
// switch (this.Type)
// {
// case IndexElementType.UnsignedByte:
// result = new UnmanagedArray<byte>(elementCount);
// break;
// case IndexElementType.UnsignedShort:
// result = new UnmanagedArray<ushort>(elementCount);
// break;
// case IndexElementType.UnsignedInt:
// result = new UnmanagedArray<uint>(elementCount);
// break;
// default:
// throw new NotImplementedException();
// }
// return result;
//}
protected override BufferPtr Upload2GPU()
{
uint[] buffers = new uint[1];
glGenBuffers(1, buffers);
glBindBuffer(OpenGL.GL_ELEMENT_ARRAY_BUFFER, buffers[0]);
glBufferData(OpenGL.GL_ELEMENT_ARRAY_BUFFER, this.ByteLength, this.Header, (uint)this.Usage);
glBindBuffer(OpenGL.GL_ELEMENT_ARRAY_BUFFER, 0);
OneIndexBufferPtr bufferPtr = new OneIndexBufferPtr(
buffers[0], this.Mode, 0, this.ElementCount, this.Type, this.Length, this.ByteLength);
return(bufferPtr);
}
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);
}
}
}
/// <summary>
///
/// </summary>
protected override IndexBufferPtr Upload2GPU()
{
uint[] buffers = new uint[1];
glGenBuffers(1, buffers);
const uint target = OpenGL.GL_ELEMENT_ARRAY_BUFFER;
glBindBuffer(target, buffers[0]);
glBufferData(target, this.ByteLength, this.Header, (uint)this.Usage);
glBindBuffer(target, 0);
var bufferPtr = new OneIndexBufferPtr(
buffers[0], this.Mode, this.Type, this.Length, this.ByteLength);
return(bufferPtr);
}
internal override uint[] Search(RenderEventArgs arg,
int x, int y,
uint lastVertexId, ZeroIndexRenderer modernRenderer)
{
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] = 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;
}
indexBufferPtr = buffer.GetBufferPtr() as OneIndexBufferPtr;
}
modernRenderer.Render4InnerPicking(arg, indexBufferPtr);
uint id = ColorCodedPicking.ReadPixel(x, y, arg.CanvasRect.Height);
indexBufferPtr.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 RecognizeUShort(uint lastVertexId, IntPtr pointer, OneIndexBufferPtr oneIndexBufferPtr, List <RecognizedPrimitiveInfo> primitiveInfoList, 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 RecognizedPrimitiveInfo(i, value);
primitiveInfoList.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 RecognizeByte(uint lastVertexId, IntPtr pointer, OneIndexBufferPtr oneIndexBufferPtr, List <RecognizedPrimitiveIndex> lastIndexIdList)
{
int length = oneIndexBufferPtr.Length;
unsafe
{
var array = (byte *)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 RecognizeByte(uint lastVertexId, IntPtr pointer, OneIndexBufferPtr oneIndexBufferPtr, List <RecognizedPrimitiveInfo> primitiveInfoList)
{
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 RecognizedPrimitiveInfo(i, array[i - 2], array[i - 1], lastVertexId);
primitiveInfoList.Add(item);
}
}
}
}
internal override uint Search(RenderEventArgs arg,
int x, int y,
RecognizedPrimitiveInfo primitiveInfo,
OneIndexRenderer modernRenderer)
{
uint[] indexList = primitiveInfo.VertexIds;
if (indexList.Length < 3)
{
throw new ArgumentException();
}
OneIndexBufferPtr indexBufferPtr = null;
using (var buffer = new OneIndexBuffer(IndexElementType.UInt, DrawMode.Points, BufferUsage.StaticDraw))
{
buffer.Create(indexList.Length);
unsafe
{
var array = (uint *)buffer.Header.ToPointer();
for (int i = 0; i < indexList.Length; i++)
{
array[i] = indexList[i];
}
}
indexBufferPtr = buffer.GetBufferPtr() as OneIndexBufferPtr;
}
modernRenderer.Render4InnerPicking(arg, indexBufferPtr);
uint id = ColorCodedPicking.ReadPixel(x, arg.CanvasRect.Height - y - 1);
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 <RecognizedPrimitiveInfo> primitiveInfoList)
{
int length = oneIndexBufferPtr.Length;
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);
}
}
}
}
/// <summary>
/// 在三角形图元中拾取指定位置的Line
/// </summary>
/// <param name="arg">渲染参数</param>
/// <param name="x">指定位置</param>
/// <param name="y">指定位置</param>
/// <param name="lastVertexId">三角形图元的最后一个顶点</param>
/// <param name="modernRenderer">目标Renderer</param>
/// <returns></returns>
internal override uint[] Search(RenderEventArgs arg,
int x, int y,
uint lastVertexId, ZeroIndexRenderer modernRenderer)
{
// 创建临时索引
OneIndexBufferPtr indexBufferPtr = null;
using (var buffer = new OneIndexBuffer <uint>(DrawMode.Lines, BufferUsage.StaticDraw))
{
buffer.Create(6);
unsafe
{
var array = (uint *)buffer.Header.ToPointer();
array[0] = lastVertexId - 1; array[1] = lastVertexId - 0;
array[2] = lastVertexId - 2; array[3] = lastVertexId - 1;
array[4] = lastVertexId - 0; array[5] = lastVertexId - 2;
}
indexBufferPtr = buffer.GetBufferPtr() as OneIndexBufferPtr;
}
// 用临时索引渲染此三角形图元（仅渲染此三角形图元）
modernRenderer.Render4InnerPicking(arg, indexBufferPtr);
// id是拾取到的Line的Last Vertex Id
uint id = ColorCodedPicking.ReadPixel(x, y, arg.CanvasRect.Height);
indexBufferPtr.Dispose();
// 对比临时索引，找到那个Line
if (id + 2 == lastVertexId)
{
return(new uint[] { id + 2, id, });
}
else
{
return(new uint[] { id - 1, id, });
}
}
/// <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="x">指定位置</param>
/// <param name="y">指定位置</param>
/// <param name="lastVertexId">三角形图元的最后一个顶点</param>
/// <param name="modernRenderer">目标Renderer</param>
/// <returns></returns>
internal override uint Search(RenderEventArgs arg,
int x, int y,
uint lastVertexId, ZeroIndexRenderer modernRenderer)
{
// 创建临时索引
OneIndexBufferPtr indexBufferPtr = null;
using (var buffer = new OneIndexBuffer <uint>(DrawMode.Points, BufferUsage.StaticDraw))
{
buffer.Create(3);
unsafe
{
var array = (uint *)buffer.Header.ToPointer();
array[0] = lastVertexId - 0;
array[1] = lastVertexId - 1;
array[2] = lastVertexId - 2;
}
indexBufferPtr = buffer.GetBufferPtr() as OneIndexBufferPtr;
}
// 用临时索引渲染此三角形图元（仅渲染此三角形图元）
modernRenderer.Render4InnerPicking(arg, indexBufferPtr);
// id是拾取到的Line的Last Vertex Id
uint id = ColorCodedPicking.ReadPixel(x, y, arg.CanvasRect.Height);
indexBufferPtr.Dispose();
// 对比临时索引，找到那个Line
if (lastVertexId - 2 <= id && id <= lastVertexId - 0)
{
return(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="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;
}
}
protected abstract void RecognizeByte(uint lastVertexId, IntPtr pointer, OneIndexBufferPtr oneIndexBufferPtr, List <RecognizedPrimitiveIndex> lastIndexIdList, uint primitiveRestartIndex);
