operand order in * operator overload

Question

I\'m writing a vec3 class for my game physics engine.

I\'ve made an operator overload to allow me to multiply a vector by a scalar (to scale the vector):

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Answer 1

You need to declare a free operator, outside the class (or inside, as a friend):

const vec3 operator*( const real n, vec3 v )
{
    //no need to re-implement, since you already have v * n defined
    return v * n;
}

The reason is that, when declared as a class member, the first operator is implicitly this, so you basically have defined vec3 * real.