/// <summary>
///
/// </summary>
/// <param name="arg"></param>
/// <param name="stageVertexId"></param>
/// <param name="x">mouse position(Left Down is (0, 0)).</param>
/// <param name="y">mouse position(Left Down is (0, 0)).</param>
/// <returns></returns>
public override PickedGeometry GetPickedGeometry(RenderEventArgs arg, uint stageVertexId,
int x, int y)
{
uint lastVertexId;
if (!this.GetLastVertexIdOfPickedGeometry(stageVertexId, out lastVertexId))
{
return(null);
}
// 找到 lastIndexId
RecognizedPrimitiveInfo lastIndexId = this.GetLastIndexIdOfPickedGeometry(
arg, lastVertexId, x, y);
if (lastIndexId == null)
{
Debug.WriteLine(string.Format(
"Got lastVertexId[{0}] but no lastIndexId! Params are [{1}] [{2}] [{3}] [{4}]",
lastVertexId, arg, stageVertexId, x, y));
{ return(null); }
}
PickingGeometryType geometryType = arg.PickingGeometryType;
DrawMode mode = this.indexBuffer.Mode;
PickingGeometryType typeOfMode = mode.ToGeometryType();
if (geometryType == PickingGeometryType.Point)
{
// 获取pickedGeometry
if (typeOfMode == PickingGeometryType.Point)
{
return(PickWhateverItIs(arg, stageVertexId, lastIndexId, typeOfMode));
}
else if (typeOfMode == PickingGeometryType.Line)
{
if (this.OnPrimitiveTest(lastVertexId, mode))
{
return(PickPoint(arg, 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 == PickingGeometryType.Line)
{
// 获取pickedGeometry
if (geometryType == typeOfMode)
{
return(PickWhateverItIs(arg, 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(arg, stageVertexId, lastIndexId, typeOfMode));
}
else
{
return(null);
}
//{ throw new Exception(string.Format("Lack of searcher for [{0}]", mode)); }
}
}
/// <summary>
///
/// </summary>
/// <param name="arg"></param>
/// <param name="stageVertexId"></param>
/// <param name="x">mouse position(Left Down is (0, 0)).</param>
/// <param name="y">mouse position(Left Down is (0, 0)).</param>
/// <param name="lastVertexId"></param>
/// <param name="primitiveInfo"></param>
/// <param name="searcher"></param>
/// <returns></returns>
private PickedGeometry SearchPoint(RenderEventArgs arg, uint stageVertexId, int x, int y, uint lastVertexId, RecognizedPrimitiveInfo primitiveInfo, OneIndexPointSearcher searcher)
{
var vertexIds = new uint[] { searcher.Search(arg, x, y, primitiveInfo, this), };
vec3[] positions = FillPickedGeometrysPosition(vertexIds);
var pickedGeometry = new PickedGeometry(PickingGeometryType.Point, positions, vertexIds, stageVertexId, this);
return(pickedGeometry);
}
/// <summary>
///
/// </summary>
/// <param name="arg"></param>
/// <param name="stageVertexId"></param>
/// <returns></returns>
public override PickedGeometry GetPickedGeometry(PickingEventArgs arg, uint stageVertexId)
{
PickableNode node = this.Renderer;
uint lastVertexId;
if (!node.GetLastVertexIdOfPickedGeometry(stageVertexId, out lastVertexId))
{
return(null);
}
// 找到 lastIndexId
RecognizedPrimitiveInfo lastIndexId = this.GetLastIndexIdOfPickedGeometry(
arg, lastVertexId);
if (lastIndexId == null)
{
Debug.WriteLine(string.Format(
"Got lastVertexId[{0}] but no lastIndexId! Params are [{1}] [{2}] [{3}] [{4}]",
lastVertexId, arg, stageVertexId));
{ return(null); }
}
PickingGeometryTypes geometryType = arg.GeometryType;
DrawMode drawMode = node.PickingRenderUnit.VertexArrayObject.IndexBuffer.Mode;
GeometryType typeOfMode = drawMode.ToGeometryType();
if ((geometryType & PickingGeometryTypes.Point) == PickingGeometryTypes.Point)
{
// 获取pickedGeometry
if (typeOfMode == GeometryType.Point)
{
return(PickWhateverItIs(arg, stageVertexId, lastIndexId, typeOfMode));
}
else if (typeOfMode == GeometryType.Line)
{
if (this.OnPrimitiveTest(lastVertexId, drawMode))
{
return(PickPoint(arg, stageVertexId, lastVertexId));
}
else
{
return(null);
}
}
else
{
OneIndexPointSearcher searcher = GetPointSearcher(drawMode);
if (searcher != null)// line is from triangle, quad or polygon
{
return(SearchPoint(arg, stageVertexId, lastVertexId, lastIndexId, searcher));
}
else
{
throw new Exception(string.Format("Lack of searcher for [{0}]", drawMode));
}
}
}
else if ((geometryType & PickingGeometryTypes.Line) == PickingGeometryTypes.Line)
{
// 获取pickedGeometry
if (typeOfMode == GeometryType.Point) // want a line when rendering GL_POINTS
{
return(null);
}
if (typeOfMode == GeometryType.Line)
{
return(PickWhateverItIs(arg, stageVertexId, lastIndexId, typeOfMode));
}
else
{
OneIndexLineSearcher searcher = GetLineSearcher(drawMode);
if (searcher != null)// line is from triangle, quad or polygon
{
return(SearchLine(arg, stageVertexId, lastIndexId, searcher));
}
else
{
throw new Exception(string.Format("Lack of searcher for [{0}]", drawMode));
}
}
}
else
{
if (geometryType.Contains(typeOfMode)) // I want what it is
{
return(PickWhateverItIs(arg, stageVertexId, lastIndexId, typeOfMode));
}
else
{
return(null);
}
//{ throw new Exception(string.Format("Lack of searcher for [{0}]", mode)); }
}
}
private static OneIndexPointSearcher GetPointSearcher(DrawMode mode)
{
OneIndexPointSearcher result = null;
switch (mode)
{
case DrawMode.Points:
break;
case DrawMode.Lines:
break;
case DrawMode.LineLoop:
break;
case DrawMode.LineStrip:
break;
case DrawMode.Triangles:
result = pointInTriangle;
break;
case DrawMode.TriangleStrip:
result = pointInTriangle;
break;
case DrawMode.TriangleFan:
result = pointInTriangle;
break;
case DrawMode.Quads:
result = pointInQuad;
break;
case DrawMode.QuadStrip:
result = pointInQuad;
break;
case DrawMode.Polygon:
result = pointInPolygon;
break;
case DrawMode.LinesAdjacency:
break;
case DrawMode.LineStripAdjacency:
break;
case DrawMode.TrianglesAdjacency:
result = pointInTriangle;
break;
case DrawMode.TriangleStripAdjacency:
result = pointInTriangle;
break;
case DrawMode.Patches:
break;
default:
throw new NotDealWithNewEnumItemException(typeof(DrawMode));
}
return(result);
}
private PickedGeometry SearchPoint(RenderEventArgs arg, uint stageVertexId, int x, int y, uint lastVertexId, RecognizedPrimitiveIndex lastIndexId, OneIndexPointSearcher searcher)
{
PickedGeometry pickedGeometry = new PickedGeometry();
pickedGeometry.From = this;
pickedGeometry.GeometryType = GeometryType.Line;
pickedGeometry.StageVertexId = stageVertexId;
pickedGeometry.Indexes = new uint[] { searcher.Search(arg, x, y, lastIndexId, this), };
pickedGeometry.Positions = FillPickedGeometrysPosition(pickedGeometry.Indexes);
return(pickedGeometry);
}
private static OneIndexPointSearcher GetPointSearcher(DrawMode mode)
{
OneIndexPointSearcher result = null;
switch (mode)
{
case DrawMode.Points:
break;
case DrawMode.Lines:
break;
case DrawMode.LineLoop:
break;
case DrawMode.LineStrip:
break;
case DrawMode.Triangles:
result = pointInTriangle;
break;
case DrawMode.TriangleStrip:
result = pointInTriangle;
break;
case DrawMode.TriangleFan:
result = pointInTriangle;
break;
case DrawMode.Quads:
result = pointInQuad;
break;
case DrawMode.QuadStrip:
result = pointInQuad;
break;
case DrawMode.Polygon:
result = pointInPolygon;
break;
case DrawMode.LinesAdjacency:
break;
case DrawMode.LineStripAdjacency:
break;
case DrawMode.TrianglesAdjacency:
result = pointInTriangle;
break;
case DrawMode.TriangleStripAdjacency:
result = pointInTriangle;
break;
case DrawMode.Patches:
break;
default:
break;
}
return(result);
}
/// <summary>
///
/// </summary>
/// <param name="arg"></param>
/// <param name="stageVertexId"></param>
/// <param name="x">mouse position(Left Down is (0, 0)).</param>
/// <param name="y">mouse position(Left Down is (0, 0)).</param>
/// <param name="lastVertexId"></param>
/// <param name="primitiveInfo"></param>
/// <param name="searcher"></param>
/// <returns></returns>
private PickedGeometry SearchPoint(RenderEventArgs arg, uint stageVertexId, int x, int y, uint lastVertexId, RecognizedPrimitiveInfo primitiveInfo, OneIndexPointSearcher searcher)
{
var vertexIds = new uint[] { searcher.Search(arg, x, y, primitiveInfo, this), };
vec3[] positions = FillPickedGeometrysPosition(vertexIds);
var pickedGeometry = new PickedGeometry(arg.UsingViewPort, PickingGeometryType.Point, positions, vertexIds, stageVertexId, this);
return pickedGeometry;
}