public static PVector Add(PVector v1, PVector v2)
{
var v = v1.CopyVector();
v1.Add(v2);
return(v1);
}
public static PVector Sub(PVector v1, PVector v2)
{
var v = v1.CopyVector();
v.Sub(v2);
return(v);
}
public PVector ProjectTo(PVector vec)
{
var v = vec.CopyVector();
v.Normalize();
v.Mult(Dot(vec));
return(v);
}
public static PVector Rotate3D(PVector vector, PVector axis, double theta)
{
var vec = axis.CopyVector();
vec.Normalize();
double scalar_1 = (1 - Math.Cos(theta)) * (Dot(vector, vec));
double scalar_2 = Math.Cos(theta);
double scalar_3 = Math.Sin(theta);
PVector norm = vec.CopyVector();
PVector tv = vector.CopyVector();
PVector crs = Cross(norm, tv);
norm.Mult(scalar_1);
tv.Mult(scalar_2);
crs.Mult(scalar_3);
var retVal = norm.CopyVector();
retVal.Add(tv);
retVal.Add(crs);
return(retVal);
}
public static PCurve GetNodeCurve(PVector pt1, PVector pt2)
{
var p1 = pt1.CopyVector();
p1.Z = 0;
var p2 = pt2.CopyVector();
p2.Z = 0;
var wdif = Math.Abs(p2.X - p1.X) / 2;
if (wdif < 50)
{
wdif = 50;
}
PVector p1A = new PVector(p1.X + wdif, p1.Y);
PVector p2A = new PVector(p2.X - wdif, p2.Y);
var ls = new List <PVector>()
{
p1, p1A, p2A, p2
};
return(new PCurve(ls));
}