static void CreateCorners(List <Vec2Info> points, List <ContourCorner> corners)
{
int j = points.Count;
int beginAt = corners.Count;
if (beginAt >= ushort.MaxValue)
{
throw new NotSupportedException();
}
for (int i = 1; i < j - 1; ++i)
{
ContourCorner corner = new ContourCorner(corners.Count, points[i - 1], points[i], points[i + 1]);
corners.Add(corner);
#if DEBUG
corner.dbugLeftIndex = beginAt + i - 1;
corner.dbugMiddleIndex = beginAt + i;
corner.dbugRightIndex = beginAt + i + 1;
#endif
}
{
ContourCorner corner = new ContourCorner(corners.Count, points[j - 2], points[j - 1], points[0]);
corners.Add(corner);
#if DEBUG
corner.dbugLeftIndex = beginAt + j - 2;
corner.dbugMiddleIndex = beginAt + j - 1;
corner.dbugRightIndex = beginAt + 0;
#endif
}
{
ContourCorner corner = new ContourCorner(corners.Count, points[j - 1], points[0], points[1]);
corners.Add(corner);
#if DEBUG
corner.dbugLeftIndex = beginAt + j - 1;
corner.dbugMiddleIndex = beginAt + 0;
corner.dbugRightIndex = beginAt + 1;
#endif
}
}
static Vertex2d ConvToV2d(PointD p) => new Vertex2d(p.X, p.Y); //temp
/// <summary>
/// fill inner and outer border from corner0 to corner1
/// </summary>
/// <param name="painter"></param>
/// <param name="c0"></param>
/// <param name="c1"></param>
void FillBorders(AggPainter painter, ContourCorner c0, ContourCorner c1)
{
//counter-clockwise
if (!c0.MiddlePoint_IsTouchPoint)
{
return;
}
//with a given corner, have have information of 3 points
//left-point of the corner,=> from vertex
//middle-point, current vertex
//right-point,=> next vertex
//a vertex may be touch-curve vertext, or 'not-touch-curve' vertex
//'is not touch-curve point', => this vertex is a control point of C3 or C4 curve,
//-------------------------------------------------------
if (c0.RightPoint_IsTouchPoint)
{
//c0 => touch curve
//c1 => touch curve,
//we create an imaginary line from c0 to c1
//then we create an 'inner border' of a line from c0 to c1
//and we create an 'outer border' of a line from c0 to c1
//
using (Tools.BorrowVxs(out var v1))
{
//1. inner-border, set fill mode to inform proper color encoding of inner border
_msdfEdgePxBlender.FillMode = MsdfEdgePixelBlender.BlenderFillMode.InnerBorder;
//2020-03-13, version 3 fill is still better than v3.1,
//TODO: review version v3.1
if (_use_v3_1)
{
//version 3.1 fill technique
CreateBorder(v1, ConvToV2d(c1.RightPoint), ConvToV2d(c1.MiddlePoint), ConvToV2d(c0.MiddlePoint), ConvToV2d(c0.LeftPoint));
}
else
{
//version 3 fill technique
CreateInnerBorder(v1,
c0.MiddlePoint.X, c0.MiddlePoint.Y,
c1.MiddlePoint.X, c1.MiddlePoint.Y, INNER_BORDER_W);
}
painter.Fill(v1, c0.InnerColor);
//-------------
v1.Clear(); //reuse
//2. outer-border, set fill mode too.
_msdfEdgePxBlender.FillMode = MsdfEdgePixelBlender.BlenderFillMode.OuterBorder;
if (_use_v3_1)
{
//version 3.1 fill technique
CreateBorder(v1, ConvToV2d(c0.LeftPoint), ConvToV2d(c0.MiddlePoint), ConvToV2d(c1.MiddlePoint), ConvToV2d(c1.RightPoint));
}
else
{
//version 3 fill technique
CreateOuterBorder(v1,
c0.MiddlePoint.X, c0.MiddlePoint.Y,
c1.MiddlePoint.X, c1.MiddlePoint.Y, OUTER_BORDER_W);
}
painter.Fill(v1, c0.OuterColor);
}
}
else
{
//painter.CurrentBxtBlendOp = null;
//**
//c0 is touch line,
//but c1 is not, this means=> next segment will be a curve(C3 or C4 curve)
//
EdgeSegment ownerSeg = c1.CenterSegment;
switch (ownerSeg.SegmentKind)
{
default: throw new NotSupportedException();
case EdgeSegmentKind.CubicSegment:
{
//approximate
CubicSegment cs = (CubicSegment)ownerSeg;
using (Tools.BorrowVxs(out var v1))
using (Tools.BorrowShapeBuilder(out var b))
using (Tools.BorrowStroke(out var strk))
{
b.MoveTo(cs.P0.x + _dx, cs.P0.y + _dy) //...
.Curve4To(cs.P1.x + _dx, cs.P1.y + _dy,
cs.P2.x + _dx, cs.P2.y + _dy,
cs.P3.x + _dx, cs.P3.y + _dy)
.NoMore()
.Flatten();
//-----------------------
//fill outside part of the curve
strk.Width = CURVE_STROKE_EACHSIDE * 2;
strk.StrokeSideForOpenShape = StrokeSideForOpenShape.Outside;
strk.MakeVxs(b.CurrentSharedVxs, v1);
painter.Fill(v1, c0.OuterColor);
//-----------------------
//fill inside part of the curve
v1.Clear(); //reuse
strk.StrokeSideForOpenShape = StrokeSideForOpenShape.Inside;
strk.MakeVxs(b.CurrentSharedVxs, v1);
painter.Fill(v1, c0.InnerColor);
//-----------------------
}
}
break;
case EdgeSegmentKind.QuadraticSegment:
{
QuadraticSegment qs = (QuadraticSegment)ownerSeg;
using (Tools.BorrowVxs(out var v1))
using (Tools.BorrowShapeBuilder(out var b))
using (Tools.BorrowStroke(out var strk))
{
b.MoveTo(qs.P0.x + _dx, qs.P0.y + _dy)//...
.Curve3To(qs.P1.x + _dx, qs.P1.y + _dy,
qs.P2.x + _dx, qs.P2.y + _dy)
.NoMore()
.Flatten();
//-----------------------
//fill outside part of the curve
strk.Width = CURVE_STROKE_EACHSIDE * 2;
strk.StrokeSideForOpenShape = StrokeSideForOpenShape.Outside;
strk.MakeVxs(b.CurrentSharedVxs, v1);
painter.Fill(v1, c0.OuterColor);
//-----------------------
//fill inside part of the curve
v1.Clear();//reuse
strk.StrokeSideForOpenShape = StrokeSideForOpenShape.Inside;
strk.MakeVxs(b.CurrentSharedVxs, v1);
painter.Fill(v1, c0.InnerColor);
//-----------------------
}
}
break;
}
}
}