public MultiPartTessResult CreateMultiPartTessResult(MultiPartPolygon multipartPolygon)
{
//store internal gfx path inside render vx
MultiPartTessResult multipartTessResult = new MultiPartTessResult();
_igfxPathBuilder.CreateGraphicsPathForMultiPartRenderVx(multipartPolygon,
multipartTessResult,
_glsx.GetTessTool(),
_glsx.GetSmoothBorderBuilder());
//
return(multipartTessResult);
}
internal void CreateGraphicsPathForMultiPartRenderVx(
MultiPartPolygon multipartPolygon,
MultiPartTessResult multipartTessResult,
TessTool tessTool,
SmoothBorderBuilder borderBuilder)
{
//a multipart polygon contains a list of expand coord (x,y) set.
List <float[]> expandCoordsList = multipartPolygon.expandCoordsList;
List <int[]> endPointList = multipartPolygon.contourEndPoints;
int listCount = expandCoordsList.Count;
for (int i = 0; i < listCount; ++i)
{
//expand x,y
float[] expandCoords = expandCoordsList[i];
int[] endPoints = endPointList[i];
//area
int localVertexCount;
tessTool.TessAndAddToMultiPartResult(expandCoords,
endPoints,
multipartTessResult,
out localVertexCount);
//borders
//build smooth border
int m = endPoints.Length;
int latest_endPoint = 0;
multipartTessResult.BeginBorderPart();
for (int n = 0; n < m; ++n)
{
int endPoint = endPoints[n]; //'x' , not include 'y'
int len = (endPoint - latest_endPoint) + 1; //so len we add +1 for 'y'
int borderTriangleStripCount;
//expand coords for draw array
float[] smoothBorderXYs = borderBuilder.BuildSmoothBorders(expandCoords, latest_endPoint, len, out borderTriangleStripCount);
latest_endPoint += len + 2;
multipartTessResult.AddSmoothBorders(smoothBorderXYs, borderTriangleStripCount);
}
multipartTessResult.EndBorderPart();
}
}