func (u UnitVector3D) Cross(v UnitVector3D) (s UnitVector3D) {
sU := unit.Copy(u)
unit.Mul(sU, v)
var sV Vector3D
sV[0] = u.V[1]*v.V[2] - u.V[2]*v.V[1]
sV[1] = u.V[2]*v.V[0] - u.V[0]*v.V[2]
sV[2] = u.V[0]*v.V[1] - u.V[1]*v.V[0]
s = UnitVector3D{sU, sV}
return
}
func (u UnitVector3D) Scale(f unit.Quantity) (s UnitVector3D) {
sU := unit.Copy(u)
unit.Mul(sU, &f)
var sV Vector3D
for i := range u.V {
sV[i] = f.Value() * u.V[i]
}
s = UnitVector3D{sU, sV}
return
}
func (u UnitVector3D) Dot(v UnitVector3D) (s *unit.Quantity) {
sU := unit.Copy(u)
unit.Mul(sU, v)
var sV float64
for i := range u.V {
sV += u.V[i] * v.V[i]
}
s = unit.CreateQuantity(sV, sU)
return
}
func (u UnitVector3D) Add(v UnitVector3D) (s UnitVector3D) {
if !unit.DimensionsMatch(u, v) {
panic("Attempted to add the values of two units whose dimensions do not match.")
}
sU := unit.Copy(u)
var sV Vector3D
for i := range u.V {
sV[i] = u.V[i] + v.V[i]
}
s = UnitVector3D{sU, sV}
return
}