lerp method
Implementation
V4 lerp(V4 o, double amount) => _v4(
x + amount*(o.x - x),
y + amount*(o.y - y),
z + amount*(o.z - z),
w + amount*(o.w - w),
);
V4 lerp(V4 o, double amount) => _v4(
x + amount*(o.x - x),
y + amount*(o.y - y),
z + amount*(o.z - z),
w + amount*(o.w - w),
);