The subtract operator “sub” (-, operator$sub) by default overloaded for VecMath and chem.

For vector mathematics the sub 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, -1.0, -1.0)
println(a - a - b); //(0.0, -2.0, -3.0)

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

The sub operator is defined for different volumes:

• CSGComplement
• VolumeBase

It is used to create a CSGDifference object (The difference consists of all points which are contained in the first volume, but not in one or more of the remaining volumes.).