scale function
Scales a vec4 by a scalar number
@param {vec4} out the receiving vector @param {ReadonlyVec4} a the vector to scale @param {Number} b amount to scale the vector by @returns {vec4} out
Implementation
List<double> scale(List<double> out, List<double> a, double b) {
out[0] = a[0] * b;
out[1] = a[1] * b;
out[2] = a[2] * b;
out[3] = a[3] * b;
return out;
}