// 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;
}
public static void ShortenPath(VertexDistanceList vertexDistanceList, double s, bool closed)
{
if (s > 0.0 && vertexDistanceList.Count > 1)
{
double d;
int n = (int)(vertexDistanceList.Count - 2);
while (n != 0)
{
d = vertexDistanceList[n].dist;
if (d > s)
{
break;
}
vertexDistanceList.RemoveLast();
s -= d;
--n;
}
if (vertexDistanceList.Count < 2)
{
vertexDistanceList.Clear();
}
else
{
n = (int)vertexDistanceList.Count - 1;
VertexDistance prev = vertexDistanceList[n - 1];
VertexDistance last = vertexDistanceList[n];
d = (prev.dist - s) / prev.dist;
double x = prev.x + (last.x - prev.x) * d;
double y = prev.y + (last.y - prev.y) * d;
last.x = x;
last.y = y;
if (!prev.IsEqual(last))
{
vertexDistanceList.RemoveLast();
}
vertexDistanceList.Close(closed);
}
}
}
public static void ShortenPath(VertexDistanceList vertexDistanceList, double s, bool closed)
{
if (s > 0.0 && vertexDistanceList.Count > 1)
{
double d;
int n = (int)(vertexDistanceList.Count - 2);
while (n != 0)
{
d = vertexDistanceList[n].dist;
if (d > s) break;
vertexDistanceList.RemoveLast();
s -= d;
--n;
}
if (vertexDistanceList.Count < 2)
{
vertexDistanceList.Clear();
}
else
{
n = (int)vertexDistanceList.Count - 1;
VertexDistance prev = vertexDistanceList[n - 1];
VertexDistance last = vertexDistanceList[n];
d = (prev.dist - s) / prev.dist;
double x = prev.x + (last.x - prev.x) * d;
double y = prev.y + (last.y - prev.y) * d;
last.x = x;
last.y = y;
if (!prev.IsEqual(last))
{
vertexDistanceList.RemoveLast();
}
vertexDistanceList.Close(closed);
}
}
}