public static IMesh Skew(IMesh mesh, IPlane plane = default, IVector3D skewDirection = default, double skewFactor = 1.0)
{
IMesh dM = mesh.DeepCopy();
if (plane == default)
{
plane = IPlane.WorldXY;
}
if (skewDirection == default)
{
skewDirection = IVector3D.UnitZ;
}
IPoint3D pt;
double d;
foreach (int vK in dM.VerticesKeys)
{
pt = dM.GetVertexWithKey(vK).Position;
d = plane.DistanceToPlane(pt);
if (d > 0)
{
pt += IVector3D.Mult(skewDirection, d * skewFactor);
}
dM.SetVertexPosition(vK, pt);
}
dM.UpdateGraphics();
return(dM);
}
public static IMesh Stretch(IMesh mesh, IPlane plane = default, IVector3D direction = default, double stretchFactor = 1, double compressionFactor = 1)
{
if (plane == default)
{
plane = IPlane.WorldXY;
}
if (direction == default)
{
direction = plane.Normal;
}
IMesh dM = mesh.DeepCopy();
IPoint3D p;
IVector3D vec;
ITopologicVertex v;
foreach (int vK in mesh.VerticesKeys)
{
v = dM.GetVertexWithKey(vK);
double d = plane.DistanceToPlane(v.Position);
if (d > 1e-9)
{
p = plane.GetClosestPoint(v.Position);
vec = v.Position - p;
vec *= stretchFactor;
vec += p;
p = GetClosestPointToFictiousLine(v.Position, plane.Origin, plane.Origin + direction);
vec -= p;
vec *= 1 / compressionFactor;
vec += p;
dM.SetVertexPosition(vK, vec.X, vec.Y, vec.Z);
}
}
dM.UpdateGraphics();
return(dM);
}