public static FRectangle CalculateEllipseSegmentsBoundingBox(float cx, float cy, float rx, float ry, float aStart, float aEnd)
{
float minX = 0;
float minY = 0;
float maxX = 0;
float maxY = 0;
if (FloatMath.ArcContainsAngle(aStart, aEnd, FloatMath.RAD_POS_270))
{
minY = -ry;
}
else
{
minY = FloatMath.Min(minY, GetPointYOnEllipse(0, 0, rx, ry, aStart));
minY = FloatMath.Min(minY, GetPointYOnEllipse(0, 0, rx, ry, aEnd));
}
if (FloatMath.ArcContainsAngle(aStart, aEnd, FloatMath.RAD_POS_090))
{
maxY = +ry;
}
else
{
maxY = FloatMath.Max(maxY, GetPointYOnEllipse(0, 0, rx, ry, aStart));
maxY = FloatMath.Max(maxY, GetPointYOnEllipse(0, 0, rx, ry, aEnd));
}
if (FloatMath.ArcContainsAngle(aStart, aEnd, FloatMath.RAD_POS_180))
{
minX = -rx;
}
else
{
minX = FloatMath.Min(minX, GetPointXOnEllipse(0, 0, rx, ry, aStart));
minX = FloatMath.Min(minX, GetPointXOnEllipse(0, 0, rx, ry, aEnd));
}
if (FloatMath.ArcContainsAngle(aStart, aEnd, FloatMath.RAD_000))
{
maxX = +rx;
}
else
{
maxX = FloatMath.Max(maxX, GetPointXOnEllipse(0, 0, rx, ry, aStart));
maxX = FloatMath.Max(maxX, GetPointXOnEllipse(0, 0, rx, ry, aEnd));
}
return(new FRectangle(cx + minX, cy + minY, maxX - minX, maxY - minY));
}