// vec4 is a primitive type @(1,2,3,4) => vec4 a; // declare another @(5,6,7,8) => vec4 b; // add them a + b => vec4 sum; // difference a - b => vec4 diff; // cross product (ignores w component) a * b => vec4 c; // another way to do cross product (ignores w component) a.cross(b) => vec4 cross; // dot product (function) a.dot(b) => float dot; // print sum! <<< "sum:", sum>>>; // print difference <<< "diff:", diff>>>; // print cross product <<< "cross product:", c>>>; // print dot product <<< "dot product:", dot>>>; // array [ a, b, c ] @=> vec4 group[]; // print them <<< group[0], group[1], group[2]>>>;