public EllipsePieceSegment(FPoint center, float radiusX, float radiusY, float aStart = 0, float aEnd = FloatMath.TAU, CircularDirection dir = CircularDirection.CW)
{
this.center = center;
this.radiusX = radiusX;
this.radiusY = radiusY;
this.direction = dir;
angleStart = aStart;
angleEnd = aEnd;
if (dir == CircularDirection.CW)
{
Length = FloatMath.TAU * FloatMath.Sqrt((radiusX * radiusX + radiusY * radiusY) / 2f) * (angleEnd - angleStart) / FloatMath.TAU;
Boundings = EllipseHelper.CalculateEllipseSegmentsBoundingBox(center.X, center.Y, radiusX, radiusY, angleStart, angleEnd);
}
else
{
// inverted
Length = FloatMath.TAU * FloatMath.Sqrt((radiusX * radiusX + radiusY * radiusY) / 2f) * (angleStart - angleEnd) / FloatMath.TAU;
Boundings = EllipseHelper.CalculateEllipseSegmentsBoundingBox(center.X, center.Y, radiusX, radiusY, angleEnd, angleStart);
}
}
public CirclePieceSegment(FPoint center, float radius, float aStart = 0, float aEnd = FloatMath.TAU)
{
this.center = center;
this.radius = radius;
if (aStart < aEnd)
{
direction = CircularDirection.CW;
angleStart = aStart;
angleEnd = aEnd;
}
else
{
direction = CircularDirection.CCW;
angleStart = aEnd;
angleEnd = aStart;
}
Length = (2 * FloatMath.PI * radius) * (angleEnd - angleStart) / FloatMath.TAU;
directionZero = new Vector2(radius, 0);
Boundings = EllipseHelper.CalculateEllipseSegmentsBoundingBox(center.X, center.Y, radius, radius, angleStart, angleEnd);
}