static void FlattenPoints(EdgeSegment segment, List <Vec2Info> points)
{
switch (segment.SegmentKind)
{
default: throw new NotSupportedException();
case EdgeSegmentKind.LineSegment:
{
LinearSegment seg = (LinearSegment)segment;
points.Add(new Vec2Info(segment, Vec2PointKind.Touch1, seg.P0));
}
break;
case EdgeSegmentKind.QuadraticSegment:
{
QuadraticSegment seg = (QuadraticSegment)segment;
points.Add(new Vec2Info(segment, Vec2PointKind.Touch1, seg.P0));
points.Add(new Vec2Info(segment, Vec2PointKind.C2, seg.P1));
}
break;
case EdgeSegmentKind.CubicSegment:
{
CubicSegment seg = (CubicSegment)segment;
points.Add(new Vec2Info(segment, Vec2PointKind.Touch1, seg.P0));
points.Add(new Vec2Info(segment, Vec2PointKind.C3, seg.P1));
points.Add(new Vec2Info(segment, Vec2PointKind.C3, seg.P2));
}
break;
}
}
public override void splitInThirds(out EdgeSegment part1, out EdgeSegment part2, out EdgeSegment part3)
{
part1 = new LinearSegment(p[0], point(1 / 3.0), this.color);
part2 = new LinearSegment(point(1 / 3.0), point(2 / 3.0), this.color);
part3 = new LinearSegment(point(2 / 3.0), p[1], this.color);
}
public override void SplitInThirds(out EdgeSegment part1, out EdgeSegment part2, out EdgeSegment part3)
{
part1 = new LinearSegment(_p[0], Point(1.0 / 3.0), Color);
part2 = new LinearSegment(Point(1.0 / 3.0), Point(2.0 / 3.0), Color);
part3 = new LinearSegment(Point(2.0 / 3.0), _p[1], Color);
}
static Shape CreateShape(VertexStore vxs, out EdgeBmpLut bmpLut)
{
List <EdgeSegment> flattenEdges = new List <EdgeSegment>();
Shape shape = new Shape(); //start with blank shape
int i = 0;
double x, y;
VertexCmd cmd;
Contour cnt = null;
double latestMoveToX = 0;
double latestMoveToY = 0;
double latestX = 0;
double latestY = 0;
List <ContourCorner> corners = new List <ContourCorner>();
List <int> edgeOfNextContours = new List <int>();
List <int> cornerOfNextContours = new List <int>();
while ((cmd = vxs.GetVertex(i, out x, out y)) != VertexCmd.NoMore)
{
switch (cmd)
{
case VertexCmd.Close:
{
//close current cnt
if ((latestMoveToX != latestX) ||
(latestMoveToY != latestY))
{
//add line to close the shape
if (cnt != null)
{
flattenEdges.Add(cnt.AddLine(latestX, latestY, latestMoveToX, latestMoveToY));
}
}
if (cnt != null)
{
//***
CreateCorners(cnt, corners);
edgeOfNextContours.Add(flattenEdges.Count);
cornerOfNextContours.Add(corners.Count);
shape.contours.Add(cnt);
//***
cnt = null;
}
}
break;
case VertexCmd.C3:
{
//C3 curve (Quadratic)
if (cnt == null)
{
cnt = new Contour();
}
VertexCmd cmd1 = vxs.GetVertex(i + 1, out double x1, out double y1);
i++;
if (cmd1 != VertexCmd.LineTo)
{
throw new NotSupportedException();
}
//in this version,
//we convert Quadratic to Cubic (https://stackoverflow.com/questions/9485788/convert-quadratic-curve-to-cubic-curve)
//Control1X = StartX + ((2f/3) * (ControlX - StartX))
//Control2X = EndX + ((2f/3) * (ControlX - EndX))
//flattenEdges.Add(cnt.AddCubicSegment(
// latestX, latestY,
// ((2f / 3) * (x - latestX)) + latestX, ((2f / 3) * (y - latestY)) + latestY,
// ((2f / 3) * (x - x1)) + x1, ((2f / 3) * (y - y1)) + y1,
// x1, y1));
flattenEdges.Add(cnt.AddQuadraticSegment(latestX, latestY, x, y, x1, y1));
latestX = x1;
latestY = y1;
}
break;
case VertexCmd.C4:
{
//C4 curve (Cubic)
if (cnt == null)
{
cnt = new Contour();
}
VertexCmd cmd1 = vxs.GetVertex(i + 1, out double x2, out double y2);
VertexCmd cmd2 = vxs.GetVertex(i + 2, out double x3, out double y3);
i += 2;
if (cmd1 != VertexCmd.C4 || cmd2 != VertexCmd.LineTo)
{
throw new NotSupportedException();
}
flattenEdges.Add(cnt.AddCubicSegment(latestX, latestY, x, y, x2, y2, x3, y3));
latestX = x3;
latestY = y3;
}
break;
case VertexCmd.LineTo:
{
if (cnt == null)
{
cnt = new Contour();
}
LinearSegment lineseg = cnt.AddLine(latestX, latestY, x, y);
flattenEdges.Add(lineseg);
latestX = x;
latestY = y;
}
break;
case VertexCmd.MoveTo:
{
latestX = latestMoveToX = x;
latestY = latestMoveToY = y;
if (cnt != null)
{
shape.contours.Add(cnt);
cnt = null;
}
}
break;
}
i++;
}
if (cnt != null)
{
shape.contours.Add(cnt);
CreateCorners(cnt, corners);
edgeOfNextContours.Add(flattenEdges.Count);
cornerOfNextContours.Add(corners.Count);
cnt = null;
}
GroupingOverlapContours(shape);
//from a given shape we create a corner-arm for each corner
bmpLut = new EdgeBmpLut(corners, flattenEdges, edgeOfNextContours, cornerOfNextContours);
return(shape);
}