void CreateBorder(VertexStore vxs, Vertex2d prev, Vertex2d now, Vertex2d next0, Vertex2d next1)
{
//now we are on now
using (Tools.BorrowVxs(out var vxs1))
{
vxs.AddMoveTo(now.x, now.y);
//create outer line-join
_strokeMath.CreateJoin(vxs1, prev, now, next0);
vxs.AppendVertexStore(vxs1);
//create inner line join
//next outer line join
vxs1.Clear();//reuse
_strokeMath.CreateJoin(vxs1, now, next0, next1);
vxs.AppendVertexStore(vxs1);
vxs.AddLineTo(next0.x, next0.y);
vxs.AddCloseFigure();
}
}
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);
}
