//--------------------------------------------------------------------------------------------------
protected override void CalculateExtents()
{
// Update bounding rect
Bnd_Box2d aabb = new Bnd_Box2d();
var shapes = _Source?.GetBreps();
if (shapes != null)
{
foreach (var shape in shapes)
{
double xmin = 0;
double xmax = 0;
double ymin = 0;
double ymax = 0;
double zmin = 0;
double zmax = 0;
shape.BoundingBox()?.Get(ref xmin, ref ymin, ref zmin, ref xmax, ref ymax, ref zmax);
aabb.Add(new Pnt2d(xmin, ymin));
aabb.Add(new Pnt2d(xmax, ymax));
}
}
Extents = aabb;
}
protected override void CalculateExtents()
{
var aabb = new Bnd_Box2d();
aabb.Add(Pnt2d.Origin);
aabb.Add(DrawingRenderHelper.MeasureText(Text, Style).ToPnt());
Extents = aabb;
}
public void ReferenceValues()
{
Bnd_Box2d box = new Bnd_Box2d();
box.Add(new Pnt2d(1, 2));
box.Add(new Pnt2d(-1, -2));
double xmin = 0, ymin = 0, xmax = 0, ymax = 0;
box.Get(ref xmin, ref ymin, ref xmax, ref ymax);
Assert.AreEqual(-1, xmin);
Assert.AreEqual(1, xmax);
Assert.AreEqual(-2, ymin);
Assert.AreEqual(2, ymax);
}
//--------------------------------------------------------------------------------------------------
protected void AddCircle(Geom2d_Circle geom2DCircle, double first, double last, bool reverse)
{
if (Math.Abs(last - first) < geom2DCircle.Period())
{
// Circle arc
var start = geom2DCircle.Value(reverse ? last : first);
var end = geom2DCircle.Value(reverse ? first : last);
// Add the midpoint seems to be the simplest way to improve the BB
BoundingBox?.Add(geom2DCircle.Value(first + (last - first) / 2));
// Get parameters of circle
double radius = geom2DCircle.Radius();
double length = last - first;
double halfParameter = (geom2DCircle.LastParameter() - geom2DCircle.FirstParameter()) / 2.0;
var size = (length < halfParameter) ? SvgArcSize.Small : SvgArcSize.Large;
var sweep = geom2DCircle.Position().Sense() > 0
? (reverse ? SvgArcSweep.Negative : SvgArcSweep.Positive)
: (reverse ? SvgArcSweep.Positive : SvgArcSweep.Negative);
AddToPath(new SvgPathSegArc(start, radius, radius, 0.0f, size, sweep, end));
}
else
{
// Complete circle
var circleCenter = geom2DCircle.Location();
var circleRadius = geom2DCircle.Radius();
if (CombineToPath)
{
if (geom2DCircle.Position().Sense() > 0)
{
reverse = !reverse;
}
ClosePath();
var rimPoints = new List <Pnt2d>(4)
{
new Pnt2d(circleCenter.X, circleCenter.Y + circleRadius),
new Pnt2d(circleCenter.X - circleRadius, circleCenter.Y),
new Pnt2d(circleCenter.X, circleCenter.Y - circleRadius),
new Pnt2d(circleCenter.X + circleRadius, circleCenter.Y),
};
SvgArcSweep sweep;
if (reverse)
{
rimPoints.Reverse();
sweep = SvgArcSweep.Positive;
}
else
{
sweep = SvgArcSweep.Negative;
}
AddToPath(new SvgPathSegArc(rimPoints[0], circleRadius, circleRadius, 45.0f, SvgArcSize.Small, sweep, rimPoints[1]));
AddToPath(new SvgPathSegArc(rimPoints[1], circleRadius, circleRadius, 45.0f, SvgArcSize.Small, sweep, rimPoints[2]));
AddToPath(new SvgPathSegArc(rimPoints[2], circleRadius, circleRadius, 45.0f, SvgArcSize.Small, sweep, rimPoints[3]));
AddToPath(new SvgPathSegArc(rimPoints[3], circleRadius, circleRadius, 45.0f, SvgArcSize.Small, sweep, rimPoints[0]));
ClosePath();
}
else
{
CurrentGroup.Children.Add(new SvgCircleElement(circleCenter, circleRadius));
}
// Enlarge BB
var f = geom2DCircle.FirstParameter();
var q = (geom2DCircle.LastParameter() - f) / 4;
BoundingBox?.Add(geom2DCircle.Value(f));
BoundingBox?.Add(geom2DCircle.Value(f + q));
BoundingBox?.Add(geom2DCircle.Value(f + q * 2));
BoundingBox?.Add(geom2DCircle.Value(f + q * 3));
}
}