// built-in vector identifiers: // #declare u = <1,0> // #declare v = <0,1> // #declare o = <0,0,0> // #declare x = <1,0,0> // #declare y = <0,1,0> // #declare z = <0,0,1> // #declare t = <0,0,0,1> // #declare X=vlength(V); // length of the vector V // extract each component of a vector: // for 3D vectors: // #if (MyVector.x > 5) ... // #if (MyVector.y > 5) ... // #if (MyVector.z > 5) ... // in addition for 4D vectors: // #if (MyVector.t > 5) ... // for 2D (UV) vectors: // #if (MyVector.u > 5) ... // #if (MyVector.v > 5) ...