The addition operator “add” (+, operator$add) by default overloaded for VecMath and chem.

For vector mathematics the add operator is used for the different vectors and points:

• Vector2f
• Vector2d
• Point2f
• Point2d
• Vector3f
• Vector3d
• Point3d
• Point3f
• Vector4d
• Vector4f
• Point4d
• Point4f

Vector3f a = new Vector3f(0,1,2);
Vector3f b = new Vector3f(0,2,3);
 
println(a + b); //(0.0, 3.0, 5.0)
println(a + a + b); //(0.0, 4.0, 7.0)

This can be combined between vectors and points of the same dimension. E.g. Point2f and Vector2f or Point2d and Point2f.

The add operator can be used to add a ChemicalTerm to a ChemicalExpression.