static ZeroIndexLineSearcher GetLineSearcher(DrawMode mode)
{
if (lineSearcherDict == null)
{
var dict = new Dictionary <DrawMode, ZeroIndexLineSearcher>();
dict.Add(DrawMode.Triangles, new ZeroIndexLineInTriangleSearcher());
dict.Add(DrawMode.TrianglesAdjacency, new ZeroIndexLineInTrianglesAdjacencySearcher());
dict.Add(DrawMode.TriangleStrip, new ZeroIndexLineInTriangleStripSearcher());
dict.Add(DrawMode.TriangleStripAdjacency, new ZeroIndexLineInTriangleStripAdjacencySearcher());
dict.Add(DrawMode.TriangleFan, new ZeroIndexLineInTriangleFanSearcher());
dict.Add(DrawMode.Quads, new ZeroIndexLineInQuadSearcher());
dict.Add(DrawMode.QuadStrip, new ZeroIndexLineInQuadStripSearcher());
dict.Add(DrawMode.Polygon, new ZeroIndexLineInPolygonSearcher());
lineSearcherDict = dict;
}
ZeroIndexLineSearcher result = null;
if (lineSearcherDict.TryGetValue(mode, out result))
{
return(result);
}
else
{
return(null);
}
}
/// <summary>
/// Search line in triangles/triangle_strip/triangle_fan/
/// triangles_adjacency/triangle_strip_adjacency/
/// quads/quad_strip/polygon
/// </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="searcher"></param>
/// <returns></returns>
private PickedGeometry SearchLine(RenderEventArgs arg, uint stageVertexId,
int x, int y, uint lastVertexId, ZeroIndexLineSearcher searcher)
{
var vertexIds = searcher.Search(arg, x, y, lastVertexId, this);
var positions = FillPickedGeometrysPosition(vertexIds);
var pickedGeometry = new PickedGeometry(PickingGeometryType.Line, positions, vertexIds, stageVertexId, this);
return(pickedGeometry);
}
/// <summary>
/// Search line in triangles/triangle_strip/triangle_fan/
/// triangles_adjacency/triangle_strip_adjacency/
/// quads/quad_strip/polygon
/// </summary>
/// <param name="arg"></param>
/// <param name="stageVertexId"></param>
/// <param name="x"></param>
/// <param name="y"></param>
/// <param name="lastVertexId"></param>
/// <param name="searcher"></param>
/// <returns></returns>
private PickedGeometry SearchLine(RenderEventArgs arg, uint stageVertexId,
int x, int y, uint lastVertexId, ZeroIndexLineSearcher searcher)
{
PickedGeometry pickedGeometry = new PickedGeometry();
pickedGeometry.From = this;
pickedGeometry.GeometryType = GeometryType.Line;
pickedGeometry.StageVertexId = stageVertexId;
pickedGeometry.VertexIds = searcher.Search(arg, x, y, lastVertexId, this);
pickedGeometry.Positions = FillPickedGeometrysPosition(pickedGeometry.VertexIds);
return(pickedGeometry);
}
/// <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);
}
PickingGeometryType geometryType = arg.PickingGeometryType;
if (geometryType == PickingGeometryType.Point)
{
DrawMode mode = this.indexBuffer.Mode;
PickingGeometryType typeOfMode = mode.ToGeometryType();
if (typeOfMode == PickingGeometryType.Point)
{
return(PickWhateverItIs(arg, stageVertexId, lastVertexId, mode, typeOfMode));
}
else if (typeOfMode == PickingGeometryType.Line)
{
if (this.OnPrimitiveTest(lastVertexId, mode))
{
return(PickPoint(arg, stageVertexId, lastVertexId));
}
else
{
return(null);
}
}
else
{
ZeroIndexPointSearcher searcher = GetPointSearcher(mode);
if (searcher != null)// point is from triangle, quad or polygon
{
return(SearchPoint(arg, stageVertexId, x, y, lastVertexId, searcher));
}
else
{
throw new Exception(string.Format("Lack of searcher for [{0}]", mode));
}
}
}
else if (geometryType == PickingGeometryType.Line)
{
DrawMode mode = this.indexBuffer.Mode;
PickingGeometryType typeOfMode = mode.ToGeometryType();
if (geometryType == typeOfMode)
{
return(PickWhateverItIs(arg, stageVertexId, lastVertexId, mode, typeOfMode));
}
else
{
ZeroIndexLineSearcher searcher = GetLineSearcher(mode);
if (searcher != null)// line is from triangle, quad or polygon
{
return(SearchLine(arg, stageVertexId, x, y, lastVertexId, 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
{
DrawMode mode = this.indexBuffer.Mode;
PickingGeometryType typeOfMode = mode.ToGeometryType();
if (typeOfMode == geometryType)// I want what it is
{
return(PickWhateverItIs(arg, stageVertexId, lastVertexId, mode, typeOfMode));
}
else
{
return(null);
}
//{ throw new Exception(string.Format("Lack of searcher for [{0}]", mode)); }
}
}
private static ZeroIndexLineSearcher GetLineSearcher(DrawMode mode)
{
ZeroIndexLineSearcher result = null;
switch (mode)
{
case DrawMode.Points:
result = null;
break;
case DrawMode.Lines:
result = null;
break;
case DrawMode.LineLoop:
result = null;
break;
case DrawMode.LineStrip:
result = null;
break;
case DrawMode.Triangles:
result = lineInTriangles;
break;
case DrawMode.TriangleStrip:
result = lineInTriangleStrip;
break;
case DrawMode.TriangleFan:
result = lineInTriangleFan;
break;
case DrawMode.Quads:
result = lineInQuads;
break;
case DrawMode.QuadStrip:
result = lineInQuadStrip;
break;
case DrawMode.Polygon:
result = lineInPolygon;
break;
case DrawMode.LinesAdjacency:
result = null;
break;
case DrawMode.LineStripAdjacency:
result = null;
break;
case DrawMode.TrianglesAdjacency:
result = lineInTrianglesAdjacency;
break;
case DrawMode.TriangleStripAdjacency:
result = lineInTriangleStripAdjacency;
break;
case DrawMode.Patches:
result = null;
break;
default:
result = null;
break;
}
return(result);
}
/// <summary>
/// Search line in triangles/triangle_strip/triangle_fan/
/// triangles_adjacency/triangle_strip_adjacency/
/// quads/quad_strip/polygon
/// </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="searcher"></param>
/// <returns></returns>
private PickedGeometry SearchLine(RenderEventArgs arg, uint stageVertexId,
int x, int y, uint lastVertexId, ZeroIndexLineSearcher searcher)
{
var vertexIds = searcher.Search(arg, x, y, lastVertexId, this);
var positions = FillPickedGeometrysPosition(vertexIds);
var pickedGeometry = new PickedGeometry(arg.UsingViewPort, PickingGeometryType.Line, positions, vertexIds, stageVertexId, this);
return pickedGeometry;
}
private static ZeroIndexLineSearcher GetLineSearcher(DrawMode mode)
{
ZeroIndexLineSearcher result = null;
switch (mode)
{
case DrawMode.Points:
result = null;
break;
case DrawMode.Lines:
result = null;
break;
case DrawMode.LineLoop:
result = null;
break;
case DrawMode.LineStrip:
result = null;
break;
case DrawMode.Triangles:
result = lineInTriangles;
break;
case DrawMode.TriangleStrip:
result = lineInTriangleStrip;
break;
case DrawMode.TriangleFan:
result = lineInTriangleFan;
break;
case DrawMode.Quads:
result = lineInQuads;
break;
case DrawMode.QuadStrip:
result = lineInQuadStrip;
break;
case DrawMode.Polygon:
result = lineInPolygon;
break;
case DrawMode.LinesAdjacency:
result = null;
break;
case DrawMode.LineStripAdjacency:
result = null;
break;
case DrawMode.TrianglesAdjacency:
result = lineInTrianglesAdjacency;
break;
case DrawMode.TriangleStripAdjacency:
result = lineInTriangleStripAdjacency;
break;
case DrawMode.Patches:
result = null;
break;
default:
throw new NotDealWithNewEnumItemException(typeof(DrawMode));
}
return(result);
}
/// <summary>
/// Search line in triangles/triangle_strip/triangle_fan/
/// triangles_adjacency/triangle_strip_adjacency/
/// quads/quad_strip/polygon
/// </summary>
/// <param name="arg"></param>
/// <param name="stageVertexId"></param>
/// <param name="x"></param>
/// <param name="y"></param>
/// <param name="lastVertexId"></param>
/// <param name="searcher"></param>
/// <returns></returns>
private PickedGeometry SearchLine(RenderEventArg arg, uint stageVertexId,
int x, int y, uint lastVertexId, ZeroIndexLineSearcher searcher)
{
PickedGeometry pickedGeometry = new PickedGeometry();
pickedGeometry.From = this;
pickedGeometry.GeometryType = GeometryType.Line;
pickedGeometry.StageVertexId = stageVertexId;
pickedGeometry.Indexes = searcher.Search(arg, x, y, lastVertexId, this);
pickedGeometry.Positions = FillPickedGeometrysPosition(pickedGeometry.Indexes);
return pickedGeometry;
}