public static (double volume, IDPoint3 center)? GetVolumeAndMassCenter(this ITriObject triObject)
{
try
{
double Volume = 0;
IDPoint3 Center = MaxGlobal.DPoint3.Create(0, 0, 0);
for (int i = 0; i < triObject.Mesh.NumFaces; i++)
{
IFace face = triObject.Mesh.Faces[i];
IDPoint3 vert2 = MaxGlobal.DPoint3.Create(triObject.Mesh.GetVert((int)face.GetVert(2)));
IDPoint3 vert1 = MaxGlobal.DPoint3.Create(triObject.Mesh.GetVert((int)face.GetVert(1)));
IDPoint3 vert0 = MaxGlobal.DPoint3.Create(triObject.Mesh.GetVert((int)face.GetVert(0)));
vert1.Subtract(vert0);
vert2.Subtract(vert0);
double dV = MaxGlobal.DotProd(
MaxGlobal.CrossProd(
vert1.Subtract(vert0),
vert2.Subtract(vert0))
, vert0);
Volume += dV;
Center = Center.Add((vert0.Add(vert1).Add(vert2)).MultiplyBy(dV));
}
Volume = Volume / 6;
Center = Center.DivideBy(24);
Center = Center.DivideBy(Volume);
return(Volume, Center);
}
catch
{
return(null);
}
}
public static (double volume, Point3D center)? GetVolumeAndMassCenter(this IINode node)
{
try
{
bool toDelete = false;
ITriObject triObject = node.GetTriObjectFromNodeInCurrentTime(out toDelete);
(double volume, IDPoint3 center)? ret = triObject.GetVolumeAndMassCenter();
// Delete the triObject
//triObject.DeleteAllRefsToMe();
// Gets the WORLD position
IDMatrix3 tm = node.GetObjectTM(MaxInterface.Time, null).ToDMatrix3();
IDPoint3 worldCenter = MaxGlobal.Multiply(tm, ret.Value.center);
return(ret.Value.volume, worldCenter.ToPoint3D());
}
catch
{
return(null);
}
}
public static Point3D ToPoint3D(this IDPoint3 pnt)
{
return(new Point3D(pnt.X, pnt.Y, pnt.Z));
}
