//------------------------------------------------------------------------------------------07.02.2006
/// <summary>Writes the RepObj to the buffer.</summary>
/// <param name="e">Environment data</param>
public void Write(PdfIndirectObject_PageContents.Environment e)
{
PdfIndirectObject_PageContents p = e.pdfIndirectObject_PageContents;
RepArcBase repArcBase = (RepArcBase)e.repObj;
Double rOfsX = repArcBase.rWidth * (-repArcBase.rAlignH + 0.5);
Double rOfsY = repArcBase.rHeight * (1 - repArcBase.rAlignV - 0.5);
e.matrixD.Multiply(new MatrixD(1, 0, 0, 1, rOfsX, rOfsY));
String sDrawCommand = null;
if (repArcBase._penProp != null && repArcBase._penProp.rWidth != 0.0)
{
p.Write_Pen(repArcBase._penProp);
if (repArcBase._brushProp != null)
{
p.Write_Brush(repArcBase._brushProp);
sDrawCommand = "b"; // close, fill and stroke path
}
else
{
sDrawCommand = (repArcBase is RepArc ? "S" : "s"); // stroke : close and stroke path
}
}
else if (repArcBase._brushProp != null)
{
p.Write_Brush(repArcBase._brushProp);
sDrawCommand = "f"; // fill path
}
else
{
return;
}
Double rA = repArcBase.rWidth / 2;
Double rA2 = rA * rA;
Double rB = repArcBase.rHeight / 2;
Double rB2 = rB * rB;
// start point: P0
Double rAngle0 = RT.rRadianFromDegree(repArcBase._rStartAngle);
Double rP0X, rP0Y;
repArcBase.GetEllipseXY(rAngle0, out rP0X, out rP0Y);
p.Command("q");
p.Write_Matrix(e.matrixD);
p.Command("cm");
if (repArcBase is RepArc || repArcBase is RepCircle || repArcBase is RepEllipse)
{
p.Number(rP0X); p.Space(); p.Number(rP0Y);
p.Command("m");
}
else
{
p.Number(0); p.Space(); p.Number(0);
p.Command("m");
p.Number(rP0X); p.Space(); p.Number(rP0Y);
p.Command("l");
}
Double r = repArcBase._rSweepAngle / 180 * Math.PI;
Int32 iNumberOfArcs = ((Int32)(r / (Math.PI / 3.0))) + 1;
Double rSweepAngle = r / iNumberOfArcs;
for (Int32 iArc = 0; iArc < iNumberOfArcs; iArc++)
{
// end point: P3
Double rAngle3 = rAngle0 + rSweepAngle;
Double rP3X, rP3Y;
repArcBase.GetEllipseXY(rAngle3, out rP3X, out rP3Y);
Double rAngle05 = rAngle0 + rSweepAngle / 2.0;
Double rMX, rMY;
repArcBase.GetEllipseXY(rAngle05, out rMX, out rMY);
Double rP1X, rP2X, rP1Y, rP2Y;
Double rDenominator = rP0X * rP3Y - rP3X * rP0Y;
Debug.Assert(!RT.bEquals(rDenominator, 0, 0.0001), "parallel tangents never appears if the sweep angle is less than PI/2");
if (RT.bEquals(rP0Y, 0, 0.0001))
{
Debug.Assert(!RT.bEquals(rP3Y, 0, 0.0001), "P0 and P3 on x-axis: never appears if the sweep angle is less than PI/2");
rP1X = rP0X;
rP2X = 8.0 / 3.0 * rMX - 4.0 / 3.0 * rP0X - rP3X / 3.0;
rP1Y = 8.0 / 3.0 * rMY - rB2 / rP3Y + rB2 * rP3X * (8.0 * rMX - 4 * rP0X - rP3X) / (3.0 * rA2 * rP3Y) - rP3Y / 3.0;
rP2Y = rB2 / rP3Y * (1 - rP2X * rP3X / rA2);
}
else if (RT.bEquals(rP3Y, 0, 0.0001))
{
rP1X = 8.0 / 3.0 * rMX - rP0X / 3.0 - 4.0 / 3.0 * rP3X;
rP2X = rP3X;
rP1Y = rB2 / rP0Y * (1 - rP0X * rP1X / rA2);
rP2Y = 8.0 / 3.0 * rMY - rP0Y / 3.0 - rB2 / rP0Y + rB2 * rP0X * (8.0 * rMX - rP0X - 4 * rP3X) / (3.0 * rA2 * rP0Y);
}
else
{
rP1X = (3.0 * rA2 * rB2 * (rP0Y + rP3Y)
+ rA2 * rP0Y * rP3Y * (rP0Y + rP3Y - 8 * rMY)
+ rB2 * rP3X * rP0Y * (rP0X + rP3X - 8 * rMX))
/ (3 * rB2 * rDenominator);
rP2X = 8.0 / 3.0 * rMX - (rP0X + rP3X) / 3.0 - rP1X;
rP1Y = rB2 / rP0Y * (1 - rP0X * rP1X / rA2);
rP2Y = rB2 / rP3Y * (1 - rP2X * rP3X / rA2);
}
Debug.Assert(RT.bEquals(rMX, rP0X / 8.0 + 3.0 / 8.0 * rP1X + 3.0 / 8.0 * rP2X + rP3X / 8.0, 0.0001));
Debug.Assert(RT.bEquals(rMY, rP0Y / 8.0 + 3.0 / 8.0 * rP1Y + 3.0 / 8.0 * rP2Y + rP3Y / 8.0, 0.0001));
p.Number(rP1X); p.Space(); p.Number(rP1Y); p.Space(); p.Number(rP2X); p.Space(); p.Number(rP2Y); p.Space();
p.Number(rP3X); p.Space(); p.Number(rP3Y);
p.Command("c");
rAngle0 += rSweepAngle;
rP0X = rP3X;
rP0Y = rP3Y;
}
p.Command(sDrawCommand);
p.Command("Q");
}
