negate function
Negates the components of a vec4
@param {vec4} out the receiving vector @param {ReadonlyVec4} a vector to negate @returns {vec4} out
Implementation
List<double> negate(List<double> out, List<double> a) {
out[0] = -a[0];
out[1] = -a[1];
out[2] = -a[2];
out[3] = -a[3];
return out;
}