normalize function
Normalize a vec2
@param {vec2} out the receiving vector @param {ReadonlyVec2} a vector to normalize @returns {vec2} out
Implementation
List<double> normalize(out, a) {
var x = a[0], y = a[1];
var len = x * x + y * y;
if (len > 0) {
// TODO: evaluate use of glm_invsqrt here?
len = 1 / math.sqrt(len);
}
out[0] = a[0] * len;
out[1] = a[1] * len;
return out;
}