public bool TessPolygon(float[] vertex2dCoords, int[] contourEndPoints)
{
//internal tess the polygon
int ncoords = vertex2dCoords.Length / 2;
tessListener.ResetAndLoadInputVertexList(ncoords);
if (ncoords == 0)
{
return(false);
}
//-----------------------
//this support sub contour in the same array of vertex2dCoords
tess.BeginPolygon();
if (contourEndPoints == null)
{
//only 1 contour
int beginAt = 0;
int thisContourEndAt = vertex2dCoords.Length / 2;
tess.BeginContour();
for (int i = beginAt; i < thisContourEndAt; ++i)
{
tess.AddVertex(
vertex2dCoords[i << 1], //*2
vertex2dCoords[(i << 1) + 1], 0, i); //*2+1
}
beginAt = thisContourEndAt + 1;
tess.EndContour();
}
else
{
//may have more than 1 contour
int nContourCount = contourEndPoints.Length;
int beginAt = 0;
for (int m = 0; m < nContourCount; ++m)
{
int thisContourEndAt = (contourEndPoints[m] + 1) / 2;
tess.BeginContour();
for (int i = beginAt; i < thisContourEndAt; ++i)
{
tess.AddVertex(
vertex2dCoords[i << 1], //*2
vertex2dCoords[(i << 1) + 1], 0, i); //*2+1
}
beginAt = thisContourEndAt + 1;
tess.EndContour();
}
}
tess.EndPolygon();
//-----------------------
return(true);
}
public bool TessPolygon(IPolygonVerticeReader polygonReader, Tesselator.ITessListener listner)
{
//internal tess the polygon
polygonReader.Reset();
listner.BeginRead();
//
State state = polygonReader.CurrentState;
int current_vertex = 0;
float cur_x = 0;
float cur_y = 0;
for (; ;)
{
switch (state)
{
case State.BeginPolygon:
_tess.BeginPolygon();
break;
case State.BeginContour:
_tess.BeginContour();
break;
case State.Vertex:
_tess.AddVertex(cur_x, cur_y, current_vertex);
current_vertex++;
break;
case State.EndContour:
_tess.EndContour();
break;
case State.EndPolygon:
_tess.EndPolygon();
goto EXIT_LOOP;
}
state = polygonReader.ReadNext(out cur_x, out cur_y);
}
EXIT_LOOP:
return(true);
}
public void EndPolygon()
{
m_Tesselator.EndPolygon();
}
