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.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;
}
modernRenderer.Render4InnerPicking(arg, indexBufferPtr);
uint id = ColorCodedPicking.ReadPixel(x, y, arg.CanvasRect.Height);
indexBufferPtr.Dispose();
if (lastVertexId - 2 <= id && id <= lastVertexId - 0)
{
return(id);
}
else
{
throw new Exception("This should not happen!");
}
}
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!");
}
}
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 - 1; array[1] = lastVertexId - 0;
array[2] = lastVertexId - 2; array[3] = lastVertexId - 1;
array[4] = lastVertexId - 3; array[5] = lastVertexId - 2;
array[6] = lastVertexId - 0; array[7] = lastVertexId - 3;
}
indexBufferPtr = buffer.GetBufferPtr() as OneIndexBufferPtr;
}
modernRenderer.Render4InnerPicking(arg, indexBufferPtr);
uint id = ColorCodedPicking.ReadPixel(x, y, arg.CanvasRect.Height);
indexBufferPtr.Dispose();
if (id + 3 == lastVertexId)
{
return(new uint[] { id + 3, id, });
}
else
{
return(new uint[] { id - 1, id, });
}
}
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!");
}
}
}
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!");
}
}
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.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, arg.CanvasRect.Height - y - 1);
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!");
}
}
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,
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!");
}
}
/// <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(IndexElementType.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, arg.CanvasRect.Height - y - 1);
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!");
}
}