public StrokeGenerator()
{
m_stroker = new StrokeMath();
vertexDistanceList = new VertexDistanceList();
m_out_vertices = new VertexStore();
m_status = StrokeMath.Status.Init;
}
public ContourGenerator()
{
m_stroker = new StrokeMath();
m_width = 1;
vertexDistanceList = new VertexDistanceList();
m_out_vertices = new VertexStore();
m_status = StrokeMath.Status.Init;
m_src_vertex = 0;
m_closed = false;
m_orientation = 0;
m_auto_detect = false;
}
// Generator interface
public void RemoveAll()
{
vertexDistanceList.Clear();
m_closed = false;
m_status = StrokeMath.Status.Init;
}
public VertexCmd GetNextVertex(ref double x, ref double y)
{
VertexCmd cmd = VertexCmd.LineTo;
while (!VertexHelper.IsEmpty(cmd))
{
switch (m_status)
{
case StrokeMath.Status.Init:
this.RewindZero();
goto case StrokeMath.Status.Ready;
case StrokeMath.Status.Ready:
if (vertexDistanceList.Count < 2 + (m_closed ? 1 : 0))
{
cmd = VertexCmd.NoMore;
break;
}
m_status = StrokeMath.Status.Outline1;
cmd = VertexCmd.MoveTo;
m_src_vertex = 0;
m_out_vertex = 0;
goto case StrokeMath.Status.Outline1;
case StrokeMath.Status.Outline1:
if (m_src_vertex >= vertexDistanceList.Count)
{
m_status = StrokeMath.Status.EndPoly1;
break;
}
m_stroker.CreateJoin(m_out_vertices,
vertexDistanceList.prev(m_src_vertex),
vertexDistanceList.curr(m_src_vertex),
vertexDistanceList.next(m_src_vertex),
vertexDistanceList.prev(m_src_vertex).dist,
vertexDistanceList.curr(m_src_vertex).dist);
++m_src_vertex;
m_status = StrokeMath.Status.OutVertices;
m_out_vertex = 0;
goto case StrokeMath.Status.OutVertices;
case StrokeMath.Status.OutVertices:
if (m_out_vertex >= m_out_vertices.Count)
{
m_status = StrokeMath.Status.Outline1;
}
else
{
m_out_vertices.GetVertex(m_out_vertex++, out x, out y);
return(cmd);
}
break;
case StrokeMath.Status.EndPoly1:
if (!m_closed)
{
return(VertexCmd.NoMore);
}
m_status = StrokeMath.Status.Stop;
x = (int)EndVertexOrientation.CCW;
return(VertexCmd.Close);
case StrokeMath.Status.Stop:
return(VertexCmd.NoMore);
}
}
return(cmd);
}
VertexCmd GetNextVertex(ref double x, ref double y)
{
VertexCmd cmd = VertexCmd.LineTo;
while (!VertexHelper.IsEmpty(cmd))
{
switch (m_status)
{
case StrokeMath.Status.Init:
this.Rewind();
goto case StrokeMath.Status.Ready;
case StrokeMath.Status.Ready:
if (vertexDistanceList.Count < 2 + (m_closed ? 1 : 0))
{
cmd = VertexCmd.Stop;
break;
}
m_status = m_closed ? StrokeMath.Status.Outline1 : StrokeMath.Status.Cap1;
cmd = VertexCmd.MoveTo;
m_src_vertex = 0;
m_out_vertex = 0;
break;
case StrokeMath.Status.Cap1:
m_stroker.CreateCap(
m_out_vertices,
vertexDistanceList[0],
vertexDistanceList[1],
vertexDistanceList[0].dist);
m_src_vertex = 1;
m_prev_status = StrokeMath.Status.Outline1;
m_status = StrokeMath.Status.OutVertices;
m_out_vertex = 0;
break;
case StrokeMath.Status.Cap2:
m_stroker.CreateCap(m_out_vertices,
vertexDistanceList[vertexDistanceList.Count - 1],
vertexDistanceList[vertexDistanceList.Count - 2],
vertexDistanceList[vertexDistanceList.Count - 2].dist);
m_prev_status = StrokeMath.Status.Outline2;
m_status = StrokeMath.Status.OutVertices;
m_out_vertex = 0;
break;
case StrokeMath.Status.Outline1:
if (m_closed)
{
if (m_src_vertex >= vertexDistanceList.Count)
{
m_prev_status = StrokeMath.Status.CloseFirst;
m_status = StrokeMath.Status.EndPoly1;
break;
}
}
else
{
if (m_src_vertex >= vertexDistanceList.Count - 1)
{
m_status = StrokeMath.Status.Cap2;
break;
}
}
m_stroker.CreateJoin(m_out_vertices,
vertexDistanceList.prev(m_src_vertex),
vertexDistanceList.curr(m_src_vertex),
vertexDistanceList.next(m_src_vertex),
vertexDistanceList.prev(m_src_vertex).dist,
vertexDistanceList.curr(m_src_vertex).dist);
++m_src_vertex;
m_prev_status = m_status;
m_status = StrokeMath.Status.OutVertices;
m_out_vertex = 0;
break;
case StrokeMath.Status.CloseFirst:
m_status = StrokeMath.Status.Outline2;
cmd = VertexCmd.MoveTo;
goto case StrokeMath.Status.Outline2;
case StrokeMath.Status.Outline2:
if (m_src_vertex <= (!m_closed ? 1 : 0))
{
m_status = StrokeMath.Status.EndPoly2;
m_prev_status = StrokeMath.Status.Stop;
break;
}
--m_src_vertex;
m_stroker.CreateJoin(m_out_vertices,
vertexDistanceList.next(m_src_vertex),
vertexDistanceList.curr(m_src_vertex),
vertexDistanceList.prev(m_src_vertex),
vertexDistanceList.curr(m_src_vertex).dist,
vertexDistanceList.prev(m_src_vertex).dist);
m_prev_status = m_status;
m_status = StrokeMath.Status.OutVertices;
m_out_vertex = 0;
break;
case StrokeMath.Status.OutVertices:
if (m_out_vertex >= m_out_vertices.Count)
{
m_status = m_prev_status;
}
else
{
m_out_vertices.GetVertex(m_out_vertex++, out x, out y);
//Vector2 c = m_out_vertices[(int)m_out_vertex++];
//x = c.x;
//y = c.y;
return(cmd);
}
break;
case StrokeMath.Status.EndPoly1:
m_status = m_prev_status;
x = (int)EndVertexOrientation.CCW;
return(VertexCmd.EndAndCloseFigure);
case StrokeMath.Status.EndPoly2:
m_status = m_prev_status;
x = (int)EndVertexOrientation.CW;
return(VertexCmd.EndAndCloseFigure);
case StrokeMath.Status.Stop:
cmd = VertexCmd.Stop;
break;
}
}
return(cmd);
}
// Vertex Generator Interface
public void RemoveAll()
{
vertexDistanceList.Clear();
m_closed = false;
m_status = StrokeMath.Status.Init;
}
VertexCmd GetNextVertex(ref double x, ref double y)
{
VertexCmd cmd = VertexCmd.LineTo;
while (!VertexHelper.IsEmpty(cmd))
{
switch (m_status)
{
case StrokeMath.Status.Init:
this.Rewind();
goto case StrokeMath.Status.Ready;
case StrokeMath.Status.Ready:
if (vertexDistanceList.Count < 2 + (m_closed ? 1 : 0))
{
cmd = VertexCmd.Stop;
break;
}
m_status = m_closed ? StrokeMath.Status.Outline1 : StrokeMath.Status.Cap1;
cmd = VertexCmd.MoveTo;
m_src_vertex = 0;
m_out_vertex = 0;
break;
case StrokeMath.Status.Cap1:
m_stroker.CreateCap(
m_out_vertices,
vertexDistanceList[0],
vertexDistanceList[1],
vertexDistanceList[0].dist);
m_src_vertex = 1;
m_prev_status = StrokeMath.Status.Outline1;
m_status = StrokeMath.Status.OutVertices;
m_out_vertex = 0;
break;
case StrokeMath.Status.Cap2:
m_stroker.CreateCap(m_out_vertices,
vertexDistanceList[vertexDistanceList.Count - 1],
vertexDistanceList[vertexDistanceList.Count - 2],
vertexDistanceList[vertexDistanceList.Count - 2].dist);
m_prev_status = StrokeMath.Status.Outline2;
m_status = StrokeMath.Status.OutVertices;
m_out_vertex = 0;
break;
case StrokeMath.Status.Outline1:
if (m_closed)
{
if (m_src_vertex >= vertexDistanceList.Count)
{
m_prev_status = StrokeMath.Status.CloseFirst;
m_status = StrokeMath.Status.EndPoly1;
break;
}
}
else
{
if (m_src_vertex >= vertexDistanceList.Count - 1)
{
m_status = StrokeMath.Status.Cap2;
break;
}
}
m_stroker.CreateJoin(m_out_vertices,
vertexDistanceList.prev(m_src_vertex),
vertexDistanceList.curr(m_src_vertex),
vertexDistanceList.next(m_src_vertex),
vertexDistanceList.prev(m_src_vertex).dist,
vertexDistanceList.curr(m_src_vertex).dist);
++m_src_vertex;
m_prev_status = m_status;
m_status = StrokeMath.Status.OutVertices;
m_out_vertex = 0;
break;
case StrokeMath.Status.CloseFirst:
m_status = StrokeMath.Status.Outline2;
cmd = VertexCmd.MoveTo;
goto case StrokeMath.Status.Outline2;
case StrokeMath.Status.Outline2:
if (m_src_vertex <= (!m_closed ? 1 : 0))
{
m_status = StrokeMath.Status.EndPoly2;
m_prev_status = StrokeMath.Status.Stop;
break;
}
--m_src_vertex;
m_stroker.CreateJoin(m_out_vertices,
vertexDistanceList.next(m_src_vertex),
vertexDistanceList.curr(m_src_vertex),
vertexDistanceList.prev(m_src_vertex),
vertexDistanceList.curr(m_src_vertex).dist,
vertexDistanceList.prev(m_src_vertex).dist);
m_prev_status = m_status;
m_status = StrokeMath.Status.OutVertices;
m_out_vertex = 0;
break;
case StrokeMath.Status.OutVertices:
if (m_out_vertex >= m_out_vertices.Count)
{
m_status = m_prev_status;
}
else
{
m_out_vertices.GetVertex(m_out_vertex++, out x, out y);
//Vector2 c = m_out_vertices[(int)m_out_vertex++];
//x = c.x;
//y = c.y;
return cmd;
}
break;
case StrokeMath.Status.EndPoly1:
m_status = m_prev_status;
x = (int)EndVertexOrientation.CCW;
return VertexCmd.CloseAndEndFigure;
case StrokeMath.Status.EndPoly2:
m_status = m_prev_status;
x = (int)EndVertexOrientation.CW;
return VertexCmd.CloseAndEndFigure;
case StrokeMath.Status.Stop:
cmd = VertexCmd.Stop;
break;
}
}
return cmd;
}
void Rewind()
{
if (m_status == StrokeMath.Status.Init)
{
vertexDistanceList.Close(m_closed);
VertexHelper.ShortenPath(vertexDistanceList, m_shorten, m_closed);
if (vertexDistanceList.Count < 3) { m_closed = false; }
}
m_status = StrokeMath.Status.Ready;
m_src_vertex = 0;
m_out_vertex = 0;
}
public void AddVertex(double x, double y, VertexCmd cmd)
{
m_status = StrokeMath.Status.Init;
switch (cmd)
{
case VertexCmd.MoveTo:
vertexDistanceList.ReplaceLast(new VertexDistance(x, y));
break;
case VertexCmd.CloseAndEndFigure:
m_closed = true;
break;
case VertexCmd.EndFigure:
m_closed = false;
break;
default:
vertexDistanceList.AddVertex(new VertexDistance(x, y));
break;
}
}
public void AddVertex(double x, double y, VertexCmd cmd)
{
m_status = StrokeMath.Status.Init;
switch (cmd)
{
case VertexCmd.MoveTo:
vertexDistanceList.ReplaceLast(new VertexDistance(x, y));
break;
case VertexCmd.CloseAndEndFigure:
{
//end and close
m_closed = true;
if (m_orientation == EndVertexOrientation.Unknown)
{
switch ((int)x)
{
case 1:
case 2:
{
m_orientation = (EndVertexOrientation)x;
}
break;
}
}
}
break;
case VertexCmd.EndFigure:
//end not close
if (m_orientation == EndVertexOrientation.Unknown)
{
switch ((int)x)
{
case 1:
case 2:
{
m_orientation = (EndVertexOrientation)x;
}
break;
}
}
break;
default:
vertexDistanceList.AddVertex(new VertexDistance(x, y));
break;
}
}
public VertexCmd GetNextVertex(ref double x, ref double y)
{
VertexCmd cmd = VertexCmd.LineTo;
while (!VertexHelper.IsEmpty(cmd))
{
switch (m_status)
{
case StrokeMath.Status.Init:
this.RewindZero();
goto case StrokeMath.Status.Ready;
case StrokeMath.Status.Ready:
if (vertexDistanceList.Count < 2 + (m_closed ? 1 : 0))
{
cmd = VertexCmd.Stop;
break;
}
m_status = StrokeMath.Status.Outline1;
cmd = VertexCmd.MoveTo;
m_src_vertex = 0;
m_out_vertex = 0;
goto case StrokeMath.Status.Outline1;
case StrokeMath.Status.Outline1:
if (m_src_vertex >= vertexDistanceList.Count)
{
m_status = StrokeMath.Status.EndPoly1;
break;
}
m_stroker.CreateJoin(m_out_vertices,
vertexDistanceList.prev(m_src_vertex),
vertexDistanceList.curr(m_src_vertex),
vertexDistanceList.next(m_src_vertex),
vertexDistanceList.prev(m_src_vertex).dist,
vertexDistanceList.curr(m_src_vertex).dist);
++m_src_vertex;
m_status = StrokeMath.Status.OutVertices;
m_out_vertex = 0;
goto case StrokeMath.Status.OutVertices;
case StrokeMath.Status.OutVertices:
if (m_out_vertex >= m_out_vertices.Count)
{
m_status = StrokeMath.Status.Outline1;
}
else
{
m_out_vertices.GetVertex(m_out_vertex++, out x, out y);
return cmd;
}
break;
case StrokeMath.Status.EndPoly1:
if (!m_closed) return VertexCmd.Stop;
m_status = StrokeMath.Status.Stop;
x = (int)EndVertexOrientation.CCW;
return VertexCmd.CloseAndEndFigure;
case StrokeMath.Status.Stop:
return VertexCmd.Stop;
}
}
return cmd;
}
// Vertex Source Interface
void RewindZero()
{
if (m_status == StrokeMath.Status.Init)
{
vertexDistanceList.Close(true);
if (m_auto_detect)
{
if (m_orientation == EndVertexOrientation.Unknown)
{
m_orientation = (AggMath.CalculatePolygonArea(vertexDistanceList) > 0.0) ?
EndVertexOrientation.CCW :
EndVertexOrientation.CW;
}
}
switch (m_orientation)
{
case EndVertexOrientation.CCW:
{
m_stroker.Width = m_width;
}
break;
case EndVertexOrientation.CW:
{
m_stroker.Width = -m_width;
}
break;
}
}
m_status = StrokeMath.Status.Ready;
m_src_vertex = 0;
}
