/// <summary>
/// Gets the parameters required to draw an arc.
/// </summary>
private void GetArcParameters(C2DArc Arc, C2DRect Rect, ref int nStartAngle, ref int nSweepAngle)
{
C2DPoint Centre = Arc.GetCircleCentre();
Rect.Set(Centre.x - Arc.Radius, Centre.y + Arc.Radius,
Centre.x + Arc.Radius, Centre.y - Arc.Radius);
ScaleAndOffSet(Rect.TopLeft);
ScaleAndOffSet(Rect.BottomRight);
ScaleAndOffSet(Centre); // CR 19-1-09
C2DPoint bottomRightTemp = new C2DPoint(Rect.BottomRight); // to make valid // CR 11-3-09
Rect.BottomRight.Set(Rect.TopLeft); // to make valid // CR 11-3-09
Rect.ExpandToInclude(bottomRightTemp); // to make valid // CR 11-3-09
C2DPoint pt1 = Arc.Line.GetPointFrom();
C2DPoint pt2 = Arc.Line.GetPointTo();
this.ScaleAndOffSet(pt1);
this.ScaleAndOffSet(pt2);
C2DVector vec1 = new C2DVector(Centre, pt1);
C2DVector vec2 = new C2DVector(Centre, pt2);
C2DVector vecx = new C2DVector(100, 0); // x - axis
double dStartAngle = vecx.AngleToLeft(vec1) * Constants.conDegreesPerRadian;
double dSweepAngle = 0;
bool bAlreadyFlipped = Scale.x * Scale.y < 0;
if (Arc.ArcOnRight ^ bAlreadyFlipped)
{
dSweepAngle = vec1.AngleToLeft(vec2) * Constants.conDegreesPerRadian;
}
else
{
dSweepAngle = -vec1.AngleToRight(vec2) * Constants.conDegreesPerRadian;
}
nStartAngle = (int)dStartAngle;
if (nStartAngle == 360)
{
nStartAngle = 0;
}
nSweepAngle = (int)dSweepAngle;
}
/// <summary>
/// Gets the parameters required to draw an arc.
/// </summary>
private void GetArcParameters(C2DArc Arc, C2DRect Rect, ref int nStartAngle, ref int nSweepAngle)
{
C2DPoint Centre = Arc.GetCircleCentre();
Rect.Set(Centre.x - Arc.Radius, Centre.y + Arc.Radius,
Centre.x + Arc.Radius, Centre.y - Arc.Radius);
ScaleAndOffSet(Rect.TopLeft);
ScaleAndOffSet(Rect.BottomRight);
ScaleAndOffSet(Centre); // CR 19-1-09
C2DPoint bottomRightTemp = new C2DPoint(Rect.BottomRight); // to make valid // CR 11-3-09
Rect.BottomRight.Set(Rect.TopLeft); // to make valid // CR 11-3-09
Rect.ExpandToInclude(bottomRightTemp); // to make valid // CR 11-3-09
C2DPoint pt1 = Arc.Line.GetPointFrom();
C2DPoint pt2 = Arc.Line.GetPointTo();
this.ScaleAndOffSet(pt1);
this.ScaleAndOffSet(pt2);
C2DVector vec1 = new C2DVector(Centre, pt1);
C2DVector vec2 = new C2DVector(Centre, pt2);
C2DVector vecx = new C2DVector(100, 0); // x - axis
double dStartAngle = vecx.AngleToLeft(vec1) * Constants.conDegreesPerRadian;
double dSweepAngle = 0;
bool bAlreadyFlipped = Scale.x * Scale.y < 0;
if (Arc.ArcOnRight ^ bAlreadyFlipped)
dSweepAngle = vec1.AngleToLeft(vec2) * Constants.conDegreesPerRadian;
else
dSweepAngle = -vec1.AngleToRight(vec2) * Constants.conDegreesPerRadian;
nStartAngle = (int)dStartAngle;
if (nStartAngle == 360)
nStartAngle = 0;
nSweepAngle = (int)dSweepAngle;
}
