/// <summary>
/// create polygon from flatten curve outline point
/// </summary>
/// <param name="cnt"></param>
/// <returns></returns>
static Poly2Tri.Polygon CreatePolygon2(GlyphContour cnt)
{
List <Poly2Tri.TriangulationPoint> points = new List <Poly2Tri.TriangulationPoint>();
List <GlyphPart> allParts = cnt.parts;
//---------------------------------------
//merge all generated points
//also remove duplicated point too!
List <GlyphPoint2D> mergedPoints = new List <GlyphPoint2D>();
cnt.mergedPoints = mergedPoints;
//---------------------------------------
{
int tt = 0;
int j = allParts.Count;
for (int i = 0; i < j; ++i)
{
GlyphPart p = allParts[i];
List <GlyphPoint2D> fpoints = p.GetFlattenPoints();
if (tt == 0)
{
int n = fpoints.Count;
for (int m = 0; m < n; ++m)
{
//GlyphPoint2D fp = fpoints[m];
mergedPoints.Add(fpoints[m]);
//allPoints.Add((float)fp.x);
//allPoints.Add((float)fp.y);
}
tt++;
}
else
{
//except first point
int n = fpoints.Count;
for (int m = 1; m < n; ++m)
{
//GlyphPoint2D fp = fpoints[m];
mergedPoints.Add(fpoints[m]);
//allPoints.Add((float)fp.x);
//allPoints.Add((float)fp.y);
}
}
}
}
//---------------------------------------
{
//check last (x,y) and first (x,y)
int lim = mergedPoints.Count - 1;
{
if (mergedPoints[lim].IsEqualValues(mergedPoints[0]))
{
//remove last (x,y)
mergedPoints.RemoveAt(lim);
lim -= 1;
}
}
//limitation: poly tri not accept duplicated points!
double prevX = 0;
double prevY = 0;
Dictionary <TmpPoint, bool> tmpPoints = new Dictionary <TmpPoint, bool>();
lim = mergedPoints.Count;
for (int i = 0; i < lim; ++i)
{
GlyphPoint2D p = mergedPoints[i];
double x = p.x;
double y = p.y;
if (x == prevX && y == prevY)
{
if (i > 0)
{
throw new NotSupportedException();
}
}
else
{
TmpPoint tmp_point = new TmpPoint(x, y);
if (!tmpPoints.ContainsKey(tmp_point))
{
//ensure no duplicated point
tmpPoints.Add(tmp_point, true);
var userTriangulationPoint = new Poly2Tri.TriangulationPoint(x, y)
{
userData = p
};
p.triangulationPoint = userTriangulationPoint;
points.Add(userTriangulationPoint);
}
else
{
throw new NotSupportedException();
}
prevX = x;
prevY = y;
}
}
Poly2Tri.Polygon polygon = new Poly2Tri.Polygon(points.ToArray());
return(polygon);
}
}
static void CreateFitShape(IGlyphTranslator tx,
GlyphContour contour,
float pixelScale,
bool x_axis,
bool y_axis,
bool useHalfPixel)
{
List <GlyphPoint2D> mergePoints = contour.mergedPoints;
int j = mergePoints.Count;
//merge 0 = start
double prev_px = 0;
double prev_py = 0;
double p_x = 0;
double p_y = 0;
double first_px = 0;
double first_py = 0;
{
GlyphPoint2D p = mergePoints[0];
p_x = p.x * pixelScale;
p_y = p.y * pixelScale;
if (y_axis && p.isPartOfHorizontalEdge && p.isUpperSide && p_y > 3)
{
//vertical fitting
//fit p_y to grid
p_y = RoundToNearestVerticalSide((float)p_y, useHalfPixel);
}
if (x_axis && p.IsPartOfVerticalEdge && p.IsLeftSide)
{
float new_x = RoundToNearestHorizontalSide((float)p_x);
//adjust right-side vertical edge
EdgeLine rightside = p.GetMatchingVerticalEdge();
if (rightside != null)
{
}
p_x = new_x;
}
tx.MoveTo((float)p_x, (float)p_y);
//-------------
first_px = prev_px = p_x;
first_py = prev_py = p_y;
}
for (int i = 1; i < j; ++i)
{
//all merge point is polygon point
GlyphPoint2D p = mergePoints[i];
p_x = p.x * pixelScale;
p_y = p.y * pixelScale;
if (y_axis && p.isPartOfHorizontalEdge && p.isUpperSide && p_y > 3)
{
//vertical fitting
//fit p_y to grid
p_y = RoundToNearestVerticalSide((float)p_y, useHalfPixel);
}
if (x_axis && p.IsPartOfVerticalEdge && p.IsLeftSide)
{
//horizontal fitting
//fix p_x to grid
float new_x = RoundToNearestHorizontalSide((float)p_x);
////adjust right-side vertical edge
//PixelFarm.Agg.Typography.EdgeLine rightside = p.GetMatchingVerticalEdge();
//if (rightside != null && !rightside.IsLeftSide && rightside.IsOutside)
//{
// var rightSideP = rightside.p.userData as GlyphPoint2D;
// var rightSideQ = rightside.q.userData as GlyphPoint2D;
// //find move diff
// float movediff = (float)p_x - new_x;
// //adjust right side edge
// rightSideP.x = rightSideP.x + movediff;
// rightSideQ.x = rightSideQ.x + movediff;
//}
p_x = new_x;
}
//
tx.LineTo((float)p_x, (float)p_y);
//
prev_px = p_x;
prev_py = p_y;
}
tx.LineTo((float)first_px, (float)first_py);
}
public bool IsEqualValues(GlyphPoint2D another)
{
return(x == another.x && y == another.y);
}