transformMat3 function
Transforms the vec3 with a mat3.
@param {vec3} out the receiving vector @param {ReadonlyVec3} a the vector to transform @param {ReadonlyMat3} m the 3x3 matrix to transform with @returns {vec3} out
Implementation
List<double> transformMat3(List<double> out, List<double> a, List<double> m) {
final x = a[0], y = a[1], z = a[2];
out[0] = x * m[0] + y * m[3] + z * m[6];
out[1] = x * m[1] + y * m[4] + z * m[7];
out[2] = x * m[2] + y * m[5] + z * m[8];
return out;
}