/// <summary>
/// 遍历以<paramref name="lastVertexId"/>为最后一个顶点的图元，
/// 瞄准每个图元的索引（例如1个三角形有3个索引）中的最后一个索引，
/// 将此索引在<see cref="IndexBuffer"/>中的索引（位置）收集起来。
/// </summary>
/// <param name="arg"></param>
/// <param name="lastVertexId"></param>
/// <returns></returns>
private List <RecognizedPrimitiveInfo> GetLastIndexIdList(PickingEventArgs arg, uint lastVertexId)
{
var indexBuffer = this.Renderer.PickingRenderUnit.VertexArrayObject.IndexBuffer;
PrimitiveRecognizer recognizer = PrimitiveRecognizerFactory.Create(
(arg.GeometryType.Contains(GeometryType.Point) &&
indexBuffer.Mode.ToGeometryType() == GeometryType.Line) ?
DrawMode.Points : indexBuffer.Mode);
PrimitiveRestartState glState = GetPrimitiveRestartState();
var buffer = indexBuffer as OneIndexBuffer;
IntPtr pointer = buffer.MapBuffer(MapBufferAccess.ReadOnly);
List <RecognizedPrimitiveInfo> primitiveInfoList = null;
if (glState == null)
{
primitiveInfoList = recognizer.Recognize(lastVertexId, pointer, indexBuffer as OneIndexBuffer);
}
else
{
primitiveInfoList = recognizer.Recognize(lastVertexId, pointer, indexBuffer as OneIndexBuffer, glState.RestartIndex);
}
buffer.UnmapBuffer();
return(primitiveInfoList);
}
/// <summary>
/// 遍历以<see cref="lastVerteID"/>为最后一个顶点的图元，
/// 瞄准每个图元的索引（例如1个三角形有3个索引）中的最后一个索引，
/// 将此索引在<see cref="indexBufferPtr"/>中的索引（位置）收集起来。
/// </summary>
/// <param name="lastVertexId"></param>
/// <returns></returns>
private List <RecognizedPrimitiveIndex> GetLastIndexIdList(RenderEventArgs arg, uint lastVertexId)
{
PrimitiveRecognizer recognizer = PrimitiveRecognizerFactory.Create(
(arg.RenderMode == RenderModes.ColorCodedPicking &&
arg.PickingGeometryType == GeometryType.Point &&
this.indexBufferPtr.Mode.ToGeometryType() == GeometryType.Line) ?
DrawMode.Points : this.indexBufferPtr.Mode);
PrimitiveRestartSwitch glSwitch = GetPrimitiveRestartSwitch();
OpenGL.BindBuffer(BufferTarget.ElementArrayBuffer, this.indexBufferPtr.BufferId);
IntPtr pointer = OpenGL.MapBuffer(BufferTarget.ElementArrayBuffer, MapBufferAccess.ReadOnly);
List <RecognizedPrimitiveIndex> lastIndexIdList = null;
if (glSwitch == null)
{
lastIndexIdList = recognizer.Recognize(lastVertexId, pointer, this.indexBufferPtr as OneIndexBufferPtr);
}
else
{
lastIndexIdList = recognizer.Recognize(lastVertexId, pointer, this.indexBufferPtr as OneIndexBufferPtr, glSwitch.RestartIndex);
}
OpenGL.UnmapBuffer(BufferTarget.ElementArrayBuffer);
OpenGL.BindBuffer(BufferTarget.ElementArrayBuffer, 0);
return(lastIndexIdList);
}
/// <summary>
/// 遍历以<paramref name="lastVertexId"/>为最后一个顶点的图元，
/// 瞄准每个图元的索引（例如1个三角形有3个索引）中的最后一个索引，
/// 将此索引在<see cref="IndexBuffer"/>中的索引（位置）收集起来。
/// </summary>
/// <param name="arg"></param>
/// <param name="lastVertexId"></param>
/// <returns></returns>
private List <RecognizedPrimitiveInfo> GetLastIndexIdList(RenderEventArgs arg, uint lastVertexId)
{
PrimitiveRecognizer recognizer = PrimitiveRecognizerFactory.Create(
(arg.PickingGeometryType == PickingGeometryType.Point &&
this.indexBuffer.Mode.ToGeometryType() == PickingGeometryType.Line) ?
DrawMode.Points : this.indexBuffer.Mode);
PrimitiveRestartState glState = GetPrimitiveRestartState();
var buffer = this.indexBuffer as OneIndexBuffer;
IntPtr pointer = buffer.MapBuffer(MapBufferAccess.ReadOnly);
List <RecognizedPrimitiveInfo> primitiveInfoList = null;
if (glState == null)
{
primitiveInfoList = recognizer.Recognize(lastVertexId, pointer, this.indexBuffer as OneIndexBuffer);
}
else
{
primitiveInfoList = recognizer.Recognize(lastVertexId, pointer, this.indexBuffer as OneIndexBuffer, glState.RestartIndex);
}
buffer.UnmapBuffer();
return(primitiveInfoList);
}
/// <summary>
/// 遍历以<paramref name="lastVertexId"/>为最后一个顶点的图元，
/// 瞄准每个图元的索引（例如1个三角形有3个索引）中的最后一个索引，
/// 将此索引在<see cref="IndexBuffer"/>中的索引（位置）收集起来。
/// </summary>
/// <param name="arg"></param>
/// <param name="lastVertexId"></param>
/// <returns></returns>
private List <RecognizedPrimitiveInfo> GetLastIndexIdList(PickingEventArgs arg, uint lastVertexId)
{
var drawCmd = this.DrawCommand;
PrimitiveRecognizer recognizer = PrimitiveRecognizerFactory.Create(
(arg.GeometryType.Contains(GeometryType.Point) &&
drawCmd.Mode.ToGeometryType() == GeometryType.Line) ?
DrawMode.Points : drawCmd.Mode);
PrimitiveRestartState glState = GetPrimitiveRestartState();
var buffer = (drawCmd as IHasIndexBuffer).IndexBufferObject;
IntPtr pointer = buffer.MapBuffer(MapBufferAccess.ReadOnly);
List <RecognizedPrimitiveInfo> primitiveInfoList = null;
if (glState == null)
{
primitiveInfoList = recognizer.Recognize(lastVertexId, pointer, drawCmd as DrawElementsCmd);
}
else
{
primitiveInfoList = recognizer.Recognize(lastVertexId, pointer, drawCmd as DrawElementsCmd, glState.RestartIndex);
}
buffer.UnmapBuffer();
return(primitiveInfoList);
}
/// <summary>
/// 遍历以<paramref name="flatColorVertexId"/>为最后一个顶点的图元，
/// 瞄准每个图元的索引（例如1个三角形有3个索引）中的最后一个索引，
/// 将此索引在<see cref="IndexBuffer"/>中的索引（位置）收集起来。
/// </summary>
/// <param name="arg"></param>
/// <param name="flatColorVertexId"></param>
/// <returns></returns>
private List <RecognizedPrimitiveInfo> GetPossiblePrimitives(PickingEventArgs arg, uint flatColorVertexId)
{
var drawCmd = this.DrawCommand;
DrawMode mode = drawCmd.CurrentMode;
PrimitiveRecognizer recognizer = PrimitiveRecognizerFactory.Create(
(arg.GeometryType.Contains(GeometryType.Point) &&
mode.ToGeometryType() == GeometryType.Line) ?
DrawMode.Points : mode);
List <RecognizedPrimitiveInfo> primitiveInfoList = recognizer.Recognize(flatColorVertexId, drawCmd);
return(primitiveInfoList);
}
/// <summary>
/// 遍历以<paramref name="lastVertexId"/>为最后一个顶点的图元，
/// 瞄准每个图元的索引（例如1个三角形有3个索引）中的最后一个索引，
/// 将此索引在<see cref="IndexBuffer"/>中的索引（位置）收集起来。
/// </summary>
/// <param name="arg"></param>
/// <param name="lastVertexId"></param>
/// <returns></returns>
private List <RecognizedPrimitiveInfo> GetLastIndexIdList(PickingEventArgs arg, uint lastVertexId)
{
var drawCmd = this.DrawCommand;
DrawMode mode = drawCmd.Mode;
PrimitiveRecognizer recognizer = PrimitiveRecognizerFactory.Create(
(arg.GeometryType.Contains(GeometryType.Point) &&
mode.ToGeometryType() == GeometryType.Line) ?
DrawMode.Points : mode);
PrimitiveRestartState glState = GetPrimitiveRestartState();
List <RecognizedPrimitiveInfo> primitiveInfoList = null;
if (glState == null)
{
primitiveInfoList = recognizer.Recognize(lastVertexId, drawCmd);
}
else
{
primitiveInfoList = recognizer.Recognize(lastVertexId, drawCmd, glState.RestartIndex);
}
return(primitiveInfoList);
}
public static PrimitiveRecognizer Create(DrawMode mode)
{
PrimitiveRecognizer recognizer = null;
switch (mode)
{
case DrawMode.Points:
recognizer = new PointsRecognizer();
break;
case DrawMode.LineStrip:
recognizer = new LineStripRecognizer();
break;
case DrawMode.LineLoop:
recognizer = new LineLoopRecognizer();
break;
case DrawMode.Lines:
recognizer = new LinesRecognizer();
break;
case DrawMode.LineStripAdjacency:
break;
case DrawMode.LinesAdjacency:
break;
case DrawMode.TriangleStrip:
recognizer = new TriangleStripRecognizer();
break;
case DrawMode.TriangleFan:
recognizer = new TriangleFanRecognizer();
break;
case DrawMode.Triangles:
recognizer = new TrianglesRecognizer();
break;
case DrawMode.TriangleStripAdjacency:
break;
case DrawMode.TrianglesAdjacency:
break;
case DrawMode.Patches:
break;
case DrawMode.QuadStrip:
recognizer = new QuadStripRecognizer();
break;
case DrawMode.Quads:
recognizer = new QuadsRecognizer();
break;
case DrawMode.Polygon:
break;
default:
break;
}
if (recognizer == null)
{
throw new NotImplementedException(string.Format(
"尚未实现[{0}]的recognizer!", mode));
}
return(recognizer);
}
