private void AddLineCap(PointFP p1, PointFP p2, int lineCap)
{
if (lineCap == PenFP.LINECAP_BUTT || p1.Equals(p2))
{
return;
}
var dx = p2.X - p1.X;
var dy = p2.Y - p1.Y;
var len = PointFP.Distance(dx, dy);
var cap = lineCap == PenFP.LINECAP_ROUND
? GraphicsPathFP.ROUNDCAP : GraphicsPathFP.SQUARECAP;
dx = MathFP.Mul(_ffRad, MathFP.Div(dx, len));
dy = MathFP.Mul(_ffRad, MathFP.Div(dy, len));
var m = new MatrixFP(dx, dx, dy, -dy, p2.X, p2.Y);
_outline.AddMoveTo(new PointFP(0, GraphicsPathFP.ONE).Transform(m));
for (var i = 0; i < cap.Length; i++)
{
_outline.AddLineTo(new PointFP(cap[i]).Transform(m));
}
_outline.AddLineTo(new PointFP(0, -GraphicsPathFP.ONE).Transform(m));
_outline.AddClose();
}
private void AddLineJoin(PointFP lastPoint, PointFP currPoint,
PointFP nextPoint)
{
if (lastPoint == null || currPoint == null || nextPoint == null ||
nextPoint.Equals(currPoint) || lastPoint.Equals(currPoint))
{
return;
}
PointFP p1 = null, p2 = null;
LineFP head, tail, lastHead, lastTail;
CalcHeadTail(currPoint, nextPoint,
head = new LineFP(), tail = new LineFP());
CalcHeadTail(lastPoint, currPoint,
lastHead = new LineFP(), lastTail = new LineFP());
var needLineJoin = false;
var pi1 = new PointFP();
var pi2 = new PointFP();
var cross1 = LineFP.Intersects(new LineFP(head.Pt1, tail.Pt1),
new LineFP(lastHead.Pt1, lastTail.Pt1), pi1);
var cross2 = LineFP.Intersects(new LineFP(head.Pt2, tail.Pt2),
new LineFP(lastHead.Pt2, lastTail.Pt2), pi2);
if (cross1 && !cross2 && pi1.X != SingleFP.NOT_A_NUMBER)
{
p1 = lastTail.Pt2;
p2 = head.Pt2;
needLineJoin = true;
}
else if (!cross1 && cross2 && pi2.X != SingleFP.NOT_A_NUMBER)
{
p1 = lastTail.Pt1;
p2 = head.Pt1;
needLineJoin = true;
}
if (needLineJoin)
{
_outline.AddMoveTo(cross1 ? pi1 : pi2);
_outline.AddLineTo(cross1 ? p2 : p1);
if (_lineJoin == PenFP.LINEJOIN_MITER)
{
_outline.AddLineTo(cross1 ? pi2 : pi1);
}
_outline.AddLineTo(cross1 ? p1 : p2);
_outline.AddClose();
if (_lineJoin == PenFP.LINEJOIN_ROUND)
{
AddLineCap(cross2 ? pi2 : pi1, currPoint, PenFP.LINECAP_ROUND);
}
}
}
public override void LineTo(PointFP point)
{
if (point.Equals(_currPoint))
{
return;
}
LineFP head, tail;
CalcHeadTail(_currPoint, point,
head = new LineFP(), tail = new LineFP());
if (_drawingCurve)
{
if (_lastCurveTail != null)
{
_curvePath1.AddLineTo(_lastCurveTail.Pt1);
_curvePath2.AddLineTo(_lastCurveTail.Pt2);
}
_lastCurveTail = new LineFP(tail);
}
else
{
if (_needDrawStartCap)
{
_startCapP1 = new PointFP(_currPoint);
_startCapP2 = new PointFP(point);
_needDrawStartCap = false;
}
AddLineJoin(_lastPoint, _currPoint, point);
_outline.AddMoveTo(head.Pt1);
_outline.AddLineTo(tail.Pt1);
_outline.AddLineTo(tail.Pt2);
_outline.AddLineTo(head.Pt2);
_outline.AddLineTo(head.Pt1);
_outline.AddClose();
_lastPoint = new PointFP(_currPoint);
}
base.LineTo(point);
}
private void AddLineJoin(PointFP lastPoint, PointFP currPoint,
PointFP nextPoint)
{
if (lastPoint == null || currPoint == null || nextPoint == null
|| nextPoint.Equals(currPoint) || lastPoint.Equals(currPoint))
{
return;
}
PointFP p1 = null, p2 = null;
LineFP head, tail, lastHead, lastTail;
CalcHeadTail(currPoint, nextPoint,
head = new LineFP(), tail = new LineFP());
CalcHeadTail(lastPoint, currPoint,
lastHead = new LineFP(), lastTail = new LineFP());
var needLineJoin = false;
var pi1 = new PointFP();
var pi2 = new PointFP();
var cross1 = LineFP.Intersects(new LineFP(head.Pt1, tail.Pt1),
new LineFP(lastHead.Pt1, lastTail.Pt1), pi1);
var cross2 = LineFP.Intersects(new LineFP(head.Pt2, tail.Pt2),
new LineFP(lastHead.Pt2, lastTail.Pt2), pi2);
if (cross1 && !cross2 && pi1.X != SingleFP.NOT_A_NUMBER)
{
p1 = lastTail.Pt2;
p2 = head.Pt2;
needLineJoin = true;
}
else if (!cross1 && cross2 && pi2.X != SingleFP.NOT_A_NUMBER)
{
p1 = lastTail.Pt1;
p2 = head.Pt1;
needLineJoin = true;
}
if (needLineJoin)
{
_outline.AddMoveTo(cross1 ? pi1 : pi2);
_outline.AddLineTo(cross1 ? p2 : p1);
if (_lineJoin == PenFP.LINEJOIN_MITER)
{
_outline.AddLineTo(cross1 ? pi2 : pi1);
}
_outline.AddLineTo(cross1 ? p1 : p2);
_outline.AddClose();
if (_lineJoin == PenFP.LINEJOIN_ROUND)
{
AddLineCap(cross2 ? pi2 : pi1, currPoint, PenFP.LINECAP_ROUND);
}
}
}
private void AddLineCap(PointFP p1, PointFP p2, int lineCap)
{
if (lineCap == PenFP.LINECAP_BUTT || p1.Equals(p2))
{
return;
}
var dx = p2.X - p1.X;
var dy = p2.Y - p1.Y;
var len = PointFP.Distance(dx, dy);
var cap = lineCap == PenFP.LINECAP_ROUND
? GraphicsPathFP.ROUNDCAP : GraphicsPathFP.SQUARECAP;
dx = MathFP.Mul(_ffRad, MathFP.Div(dx, len));
dy = MathFP.Mul(_ffRad, MathFP.Div(dy, len));
var m = new MatrixFP(dx, dx, dy, -dy, p2.X, p2.Y);
_outline.AddMoveTo(new PointFP(0, GraphicsPathFP.ONE).Transform(m));
for (var i = 0; i < cap.Length; i++)
{
_outline.AddLineTo(new PointFP(cap[i]).Transform(m));
}
_outline.AddLineTo(new PointFP(0, -GraphicsPathFP.ONE).Transform(m));
_outline.AddClose();
}
public override void LineTo(PointFP point)
{
if (point.Equals(_currPoint))
{
return;
}
LineFP head, tail;
CalcHeadTail(_currPoint, point,
head = new LineFP(), tail = new LineFP());
if (_drawingCurve)
{
if (_lastCurveTail != null)
{
_curvePath1.AddLineTo(_lastCurveTail.Pt1);
_curvePath2.AddLineTo(_lastCurveTail.Pt2);
}
_lastCurveTail = new LineFP(tail);
}
else
{
if (_needDrawStartCap)
{
_startCapP1 = new PointFP(_currPoint);
_startCapP2 = new PointFP(point);
_needDrawStartCap = false;
}
AddLineJoin(_lastPoint, _currPoint, point);
_outline.AddMoveTo(head.Pt1);
_outline.AddLineTo(tail.Pt1);
_outline.AddLineTo(tail.Pt2);
_outline.AddLineTo(head.Pt2);
_outline.AddLineTo(head.Pt1);
_outline.AddClose();
_lastPoint = new PointFP(_currPoint);
}
base.LineTo(point);
}
////////////////////////////////////////////////////////////////////////////
//--------------------------------- REVISIONS ------------------------------
// Date Name Tracking # Description
// --------- ------------------- ------------- ----------------------
// 13JUN2009 James Shen Initial Creation
////////////////////////////////////////////////////////////////////////////
/**
* Check to see if the point is empty one.
* @param p
* @return
*/
public static bool IsEmpty(PointFP p)
{
return(Empty.Equals(p));
}
