public static List <Poly2Tri.Polygon> GetTrianglulatedArea(this MultiFigures figures, bool yAxisPointDown)
{
List <Poly2Tri.Polygon> output = new List <Poly2Tri.Polygon>();
GetTrianglulatedArea(figures, yAxisPointDown, output);
return(output);
}
public void PreparePolygons(MultiFigures figures, List <Poly2Tri.Polygon> outputPolygons)
{
using (ReusableCoordList.Borrow(out ReusableCoordList reuseableList))
{
Figure[] figs = figures._figures;
for (int i = 0; i < figs.Length; ++i)
{
Figure fig = figs[i];
float[] figCoords = fig.coordXYs;
float prevX = float.MaxValue;
float prevY = float.MinValue;
int startAt = reuseableList._coordXYs.Count;
for (int n = 0; n < figCoords.Length;)
{
float x = figCoords[n];
float y = figCoords[n + 1];
reuseableList._coordXYs.Append(prevX = x);
reuseableList._coordXYs.Append(prevY = y);
n += 2;
}
if (reuseableList._coordXYs[startAt] == prevX && reuseableList._coordXYs[startAt + 1] == prevY)
{
reuseableList._coordXYs.RemoveLast();
reuseableList._coordXYs.RemoveLast();
}
reuseableList._contourEndPoints.Append(reuseableList._coordXYs.Count - 1); //glyph convention
}
PreparePolygons(reuseableList._coordXYs.ToArray(), reuseableList._contourEndPoints.ToArray(), outputPolygons);
}
}
public static void GetTrianglulatedArea(this MultiFigures figures, bool yAxisPointDown, List <Poly2Tri.Polygon> output)
{
using (Poly2TriTool.Borrow(out Poly2TriTool poly2Tri))
{
poly2Tri.YAxisPointDown = yAxisPointDown;
poly2Tri.PreparePolygons(figures, output);
poly2Tri.Triangulate(output);
figures.Poly2TriPolygons = output;
}
}
public FigureContainer(MultiFigures multiFig)
{
_figure = null;
_multiFig = multiFig;
}
public FigureContainer(Figure fig)
{
_figure = fig;
_multiFig = null;
}
public FigureContainer Build(PixelFarm.Drawing.VertexStore vxs)
{
//vxs must be flatten vxs.
double prevX = 0;
double prevY = 0;
double prevMoveToX = 0;
double prevMoveToY = 0;
_xylist.Clear();
_figs.Clear();
//TODO: reivew here
//about how to reuse this list
//result...
int index = 0;
VertexCmd cmd;
double x, y;
while ((cmd = vxs.GetVertex(index++, out x, out y)) != VertexCmd.NoMore)
{
switch (cmd)
{
case PixelFarm.CpuBlit.VertexCmd.MoveTo:
prevMoveToX = prevX = x;
prevMoveToY = prevY = y;
_xylist.Add((float)x);
_xylist.Add((float)y);
break;
case PixelFarm.CpuBlit.VertexCmd.LineTo:
_xylist.Add((float)x);
_xylist.Add((float)y);
prevX = x;
prevY = y;
break;
case PixelFarm.CpuBlit.VertexCmd.Close:
{
//don't add
//_xylist.Add((float)prevMoveToX);
//_xylist.Add((float)prevMoveToY);
prevX = prevMoveToX;
prevY = prevMoveToY;
//-----------
Figure newfig = new Figure(_xylist.ToArray());
newfig.IsClosedFigure = true;
_figs.Add(newfig);
//-----------
_xylist.Clear(); //clear temp list
}
break;
case PixelFarm.CpuBlit.VertexCmd.NoMore:
goto EXIT_LOOP;
default:
throw new System.NotSupportedException();
}
}
EXIT_LOOP:
if (_figs.Count == 0)
{
Figure newfig = new Figure(_xylist.ToArray());
newfig.IsClosedFigure = false;
return(new FigureContainer(newfig));
}
//
if (_xylist.Count > 1)
{
prevX = prevMoveToX;
prevY = prevMoveToY;
//
Figure newfig = new Figure(_xylist.ToArray());
newfig.IsClosedFigure = true; //?
_figs.Add(newfig);
}
if (_figs.Count == 1)
{
Figure fig = _figs[0];
_figs.Clear();
return(new FigureContainer(fig));
}
else
{
MultiFigures multiFig = new MultiFigures(_figs.ToArray());
_figs.Clear();
return(new FigureContainer(multiFig));
}
}