/// <summary>
/// calculates the tansform to convert models to metres and centre on the most populated region, includes reference models
/// </summary>
/// <returns></returns>
private XbimMatrix3D GetGlobalModelTransform()
{
XbimRegion largest = _context.GetLargestRegion();
XbimRect3D bb = XbimRect3D.Empty;
if (largest != null)
{
bb = new XbimRect3D(largest.Centre, largest.Centre);
}
foreach (var refModel in _context.Model.ReferencedModels)
{
XbimRegion r;
Xbim3DModelContext refContext = new Xbim3DModelContext(refModel.Model);
r = refContext.GetLargestRegion();
if (r != null)
{
if (bb.IsEmpty)
{
bb = new XbimRect3D(r.Centre, r.Centre);
}
else
{
bb.Union(r.Centre);
}
}
}
XbimPoint3D p = bb.Centroid();
var modelTranslation = new XbimVector3D(-p.X, -p.Y, -p.Z);
double metreFactor = 1.0 / _context.Model.ModelFactors.OneMetre;
return(XbimMatrix3D.CreateTranslation(modelTranslation) * XbimMatrix3D.CreateScale(metreFactor));
}
public XbimModelPositioning(XbimModel model)
{
_model = model;
Context = new Xbim3DModelContext(model);
var supportLevel = model.GeometrySupportLevel;
switch (supportLevel)
{
case 1:
LargestRegion = GetLargestRegion(model);
break;
case 2:
LargestRegion = Context.GetLargestRegion();
break;
}
}
private XbimPoint3D[] MinMaxPoints(XbimRegion rect, double oneMeter = 1.0)
{
var pMin = new XbimPoint3D(
(rect.Centre.X - (rect.Size.X / 2)) / oneMeter,
(rect.Centre.Y - (rect.Size.Y / 2)) / oneMeter,
(rect.Centre.Z - (rect.Size.Z / 2)) / oneMeter
);
var pMax = new XbimPoint3D(
(rect.Centre.X + (rect.Size.X / 2)) / oneMeter,
(rect.Centre.Y + (rect.Size.Y / 2)) / oneMeter,
(rect.Centre.Z + (rect.Size.Z / 2)) / oneMeter
);
return new[] { pMin, pMax };
}