Casting between Vector's with different types but the same length does not work

[ghost]

vec3 a = cast(vec3)vec3i(1, 2, 3);

[JonathanILevi]

That can be don with simple constructing it.

vec3 a = vec3(vec3i(1,2,3)); Or because of D magic simple vec3 a = vec3i(1,2,3);

float to int though is not that easy.

[JonathanILevi]

That kind of cast which you are trying to do is not intended to work. You need to cast the elements of the vector into a new vector not cast the vector.

Here are the functions I used for casting these vectors (and array cast functions):

Vector!(NT,L) vecCast(NT,OT,size_t L)(Vector!(OT,L) xs) {
    return Vector!(NT,L)(xs.vector.arrayCast!NT);
}

NT[] arrayCast(NT,OT)(OT[] xs) {
    return xs.map!(cst!(NT,OT)).array();
}
NT[L] arrayCast(NT,OT,size_t L)(OT[L] xs) {
    NT[L] nxs;
    foreach (i,e; xs) {
        nxs[i] = e.cst!NT;
    }
    return nxs;
}

The cst is just a template function version of the cast primitive. It is from the cst library on dub.

Here are 4 examples of using it:

vec3 a = vecCast!float(vec3i(1, 2, 3));
vec3i a = vecCast!int(vec3(1, 2, 3));
vec3 a = vec3i(1, 2, 3).vecCast!float;
vec3i a = vec3(1, 2, 3).vecCast!int;

[Dav1dde]

Thanks for answering, I'll assume this has been answered now.

Maybe worth adding an opCast, mh...